./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix028_tso.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_tso.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_tso.i ./goblint.2024-05-21_14-57-05.files/protection/mix028_tso.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 19:31:43,484 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:31:43,526 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:31:43,529 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:31:43,530 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:31:43,553 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:31:43,554 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:31:43,554 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:31:43,555 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:31:43,555 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:31:43,555 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:31:43,556 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:31:43,556 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:31:43,556 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:31:43,557 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:31:43,557 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:31:43,557 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:31:43,558 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:31:43,558 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:31:43,558 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:31:43,558 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:31:43,559 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:31:43,559 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:31:43,559 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:31:43,560 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:31:43,560 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:31:43,560 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:31:43,560 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:31:43,561 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:31:43,561 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:31:43,561 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:31:43,561 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:31:43,562 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:31:43,562 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:31:43,562 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:31:43,562 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:31:43,562 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:31:43,563 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:31:43,563 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:31:43,563 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:31:43,563 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:31:43,564 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:31:43,564 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:31:43,564 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:31:43,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:31:43,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:31:43,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:31:43,740 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:31:43,741 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:31:43,742 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix028_tso.yml/witness.yml [2024-06-03 19:31:43,925 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:31:43,926 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:31:43,927 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix028_tso.i [2024-06-03 19:31:44,963 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:31:45,195 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:31:45,196 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix028_tso.i [2024-06-03 19:31:45,212 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128d90c3c/3bf29a6561474136b0f37d5dd6dee423/FLAG032072ea8 [2024-06-03 19:31:45,221 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128d90c3c/3bf29a6561474136b0f37d5dd6dee423 [2024-06-03 19:31:45,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:31:45,223 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:31:45,228 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:31:45,228 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:31:45,247 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:31:45,247 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:31:43" (1/2) ... [2024-06-03 19:31:45,248 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20d2e172 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:31:45, skipping insertion in model container [2024-06-03 19:31:45,248 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:31:43" (1/2) ... [2024-06-03 19:31:45,249 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2542dbdc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:31:45, skipping insertion in model container [2024-06-03 19:31:45,249 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:31:45" (2/2) ... [2024-06-03 19:31:45,250 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20d2e172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:31:45, skipping insertion in model container [2024-06-03 19:31:45,250 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:31:45" (2/2) ... [2024-06-03 19:31:45,250 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:31:45,343 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:31:45,344 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) [2024-06-03 19:31:45,345 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) [2024-06-03 19:31:45,345 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) [2024-06-03 19:31:45,345 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:31:45,345 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-03 19:31:45,383 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:31:45,689 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:31:45,699 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:31:45,828 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:31:45,861 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:31:45,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:31:45 WrapperNode [2024-06-03 19:31:45,862 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:31:45,863 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:31:45,863 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:31:45,863 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:31:45,868 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:31:45" (1/1) ... [2024-06-03 19:31:45,895 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:31:45" (1/1) ... [2024-06-03 19:31:45,926 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 166 [2024-06-03 19:31:45,926 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:31:45,927 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:31:45,927 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:31:45,927 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:31:45,935 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:31:45" (1/1) ... [2024-06-03 19:31:45,936 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:31:45" (1/1) ... [2024-06-03 19:31:45,938 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:31:45" (1/1) ... [2024-06-03 19:31:45,960 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 19:31:45,961 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:31:45" (1/1) ... [2024-06-03 19:31:45,961 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:31:45" (1/1) ... [2024-06-03 19:31:45,979 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:31:45" (1/1) ... [2024-06-03 19:31:45,980 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:31:45" (1/1) ... [2024-06-03 19:31:45,982 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:31:45" (1/1) ... [2024-06-03 19:31:45,983 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:31:45" (1/1) ... [2024-06-03 19:31:45,985 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:31:45,986 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:31:45,986 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:31:45,986 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:31:45,986 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:31:45" (1/1) ... [2024-06-03 19:31:46,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:31:46,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:31:46,029 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 19:31:46,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:31:46,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:31:46,057 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:31:46,057 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:31:46,057 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:31:46,058 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:31:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:31:46,058 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:31:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:31:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:31:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:31:46,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:31:46,047 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 19:31:46,060 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 19:31:46,184 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:31:46,186 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:31:46,480 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:31:46,480 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:31:46,637 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:31:46,637 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:31:46,637 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:31:46 BoogieIcfgContainer [2024-06-03 19:31:46,637 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:31:46,639 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:31:46,639 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:31:46,641 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:31:46,641 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:31:43" (1/4) ... [2024-06-03 19:31:46,642 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52190ed5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:31:46, skipping insertion in model container [2024-06-03 19:31:46,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:31:45" (2/4) ... [2024-06-03 19:31:46,642 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52190ed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:31:46, skipping insertion in model container [2024-06-03 19:31:46,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:31:45" (3/4) ... [2024-06-03 19:31:46,643 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52190ed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:31:46, skipping insertion in model container [2024-06-03 19:31:46,643 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:31:46" (4/4) ... [2024-06-03 19:31:46,644 INFO L112 eAbstractionObserver]: Analyzing ICFG mix028_tso.i [2024-06-03 19:31:46,658 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:31:46,658 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 19:31:46,658 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:31:46,694 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:31:46,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 19:31:46,736 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-03 19:31:46,736 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:31:46,738 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 62 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 19:31:46,738 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 19:31:46,740 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-03 19:31:46,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:31:46,750 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;@cc798d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:31:46,751 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 19:31:46,754 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:31:46,754 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:31:46,754 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:31:46,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:46,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:31:46,755 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 19:31:46,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:46,758 INFO L85 PathProgramCache]: Analyzing trace with hash -492059225, now seen corresponding path program 1 times [2024-06-03 19:31:46,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:46,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738564340] [2024-06-03 19:31:46,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:46,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:47,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:47,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738564340] [2024-06-03 19:31:47,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738564340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:47,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:47,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:31:47,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037645321] [2024-06-03 19:31:47,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:47,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:31:47,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:47,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:31:47,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:31:47,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 19:31:47,879 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 19:31:47,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:47,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 19:31:47,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:48,199 INFO L124 PetriNetUnfolderBase]: 1359/2110 cut-off events. [2024-06-03 19:31:48,199 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-03 19:31:48,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4226 conditions, 2110 events. 1359/2110 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10225 event pairs, 941 based on Foata normal form. 1/2045 useless extension candidates. Maximal degree in co-relation 4211. Up to 2029 conditions per place. [2024-06-03 19:31:48,214 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-03 19:31:48,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 177 flow [2024-06-03 19:31:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:31:48,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:31:48,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-03 19:31:48,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 19:31:48,225 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-03 19:31:48,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 177 flow [2024-06-03 19:31:48,228 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 19:31:48,230 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-03 19:31:48,232 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 19:31:48,235 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-03 19:31:48,236 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-03 19:31:48,236 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 19:31:48,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:48,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:48,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:31:48,237 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 19:31:48,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:48,238 INFO L85 PathProgramCache]: Analyzing trace with hash -422483706, now seen corresponding path program 1 times [2024-06-03 19:31:48,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:48,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784129657] [2024-06-03 19:31:48,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:48,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:48,967 INFO 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 19:31:48,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:48,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784129657] [2024-06-03 19:31:48,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784129657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:48,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:48,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:31:48,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195609461] [2024-06-03 19:31:48,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:48,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:31:48,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:48,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:31:48,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:31:49,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:31:49,009 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 19:31:49,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:49,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:31:49,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:49,279 INFO L124 PetriNetUnfolderBase]: 1560/2338 cut-off events. [2024-06-03 19:31:49,279 INFO L125 PetriNetUnfolderBase]: For 459/459 co-relation queries the response was YES. [2024-06-03 19:31:49,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5356 conditions, 2338 events. 1560/2338 cut-off events. For 459/459 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11019 event pairs, 930 based on Foata normal form. 3/2339 useless extension candidates. Maximal degree in co-relation 5341. Up to 2302 conditions per place. [2024-06-03 19:31:49,288 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-03 19:31:49,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 246 flow [2024-06-03 19:31:49,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:31:49,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:31:49,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-06-03 19:31:49,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-03 19:31:49,290 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 88 transitions. [2024-06-03 19:31:49,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 246 flow [2024-06-03 19:31:49,291 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 19:31:49,291 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-03 19:31:49,292 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 19:31:49,292 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-03 19:31:49,292 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-03 19:31:49,293 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 19:31:49,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:49,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:49,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:31:49,293 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 19:31:49,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:49,294 INFO L85 PathProgramCache]: Analyzing trace with hash -212092032, now seen corresponding path program 1 times [2024-06-03 19:31:49,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:49,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252403209] [2024-06-03 19:31:49,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:49,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:49,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:49,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252403209] [2024-06-03 19:31:49,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252403209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:49,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:49,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:31:49,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868758175] [2024-06-03 19:31:49,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:49,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:31:49,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:49,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:31:49,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:31:49,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:31:49,994 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 19:31:49,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:49,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:31:49,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:50,275 INFO L124 PetriNetUnfolderBase]: 1568/2358 cut-off events. [2024-06-03 19:31:50,275 INFO L125 PetriNetUnfolderBase]: For 1342/1342 co-relation queries the response was YES. [2024-06-03 19:31:50,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5993 conditions, 2358 events. 1568/2358 cut-off events. For 1342/1342 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11232 event pairs, 669 based on Foata normal form. 5/2360 useless extension candidates. Maximal degree in co-relation 5976. Up to 2248 conditions per place. [2024-06-03 19:31:50,288 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-03 19:31:50,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 75 transitions, 400 flow [2024-06-03 19:31:50,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:31:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:31:50,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-03 19:31:50,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 19:31:50,293 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 115 transitions. [2024-06-03 19:31:50,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 75 transitions, 400 flow [2024-06-03 19:31:50,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 386 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 19:31:50,297 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-03 19:31:50,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-03 19:31:50,298 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-03 19:31:50,298 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-03 19:31:50,299 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 19:31:50,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:50,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:50,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:31:50,299 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 19:31:50,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:50,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1956947905, now seen corresponding path program 1 times [2024-06-03 19:31:50,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:50,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506091311] [2024-06-03 19:31:50,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:50,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:51,045 INFO 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 19:31:51,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:51,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506091311] [2024-06-03 19:31:51,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506091311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:51,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:51,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:31:51,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332681593] [2024-06-03 19:31:51,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:51,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:31:51,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:51,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:31:51,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:31:51,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:31:51,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:51,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:51,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:31:51,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:51,412 INFO L124 PetriNetUnfolderBase]: 1580/2378 cut-off events. [2024-06-03 19:31:51,412 INFO L125 PetriNetUnfolderBase]: For 3188/3191 co-relation queries the response was YES. [2024-06-03 19:31:51,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7137 conditions, 2378 events. 1580/2378 cut-off events. For 3188/3191 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11316 event pairs, 481 based on Foata normal form. 12/2387 useless extension candidates. Maximal degree in co-relation 7117. Up to 2216 conditions per place. [2024-06-03 19:31:51,456 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-03 19:31:51,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 82 transitions, 503 flow [2024-06-03 19:31:51,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:31:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:31:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-03 19:31:51,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198412698412699 [2024-06-03 19:31:51,458 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 131 transitions. [2024-06-03 19:31:51,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 82 transitions, 503 flow [2024-06-03 19:31:51,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 82 transitions, 495 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-03 19:31:51,461 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 293 flow [2024-06-03 19:31:51,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-03 19:31:51,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-03 19:31:51,463 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 293 flow [2024-06-03 19:31:51,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:51,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:51,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:51,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:31:51,463 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 19:31:51,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:51,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1897621729, now seen corresponding path program 1 times [2024-06-03 19:31:51,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:51,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217546122] [2024-06-03 19:31:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:51,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:52,059 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 19:31:52,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:52,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217546122] [2024-06-03 19:31:52,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217546122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:52,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:52,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:31:52,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728051843] [2024-06-03 19:31:52,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:52,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:31:52,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:52,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:31:52,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:31:52,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:31:52,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 293 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 19:31:52,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:52,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:31:52,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:52,495 INFO L124 PetriNetUnfolderBase]: 1368/2119 cut-off events. [2024-06-03 19:31:52,495 INFO L125 PetriNetUnfolderBase]: For 4021/4021 co-relation queries the response was YES. [2024-06-03 19:31:52,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6891 conditions, 2119 events. 1368/2119 cut-off events. For 4021/4021 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10360 event pairs, 562 based on Foata normal form. 2/2099 useless extension candidates. Maximal degree in co-relation 6868. Up to 2036 conditions per place. [2024-06-03 19:31:52,507 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 50 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2024-06-03 19:31:52,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 437 flow [2024-06-03 19:31:52,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:31:52,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:31:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-03 19:31:52,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-03 19:31:52,509 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 293 flow. Second operand 5 states and 91 transitions. [2024-06-03 19:31:52,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 437 flow [2024-06-03 19:31:52,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 63 transitions, 387 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 19:31:52,513 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 267 flow [2024-06-03 19:31:52,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-03 19:31:52,514 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-03 19:31:52,514 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 267 flow [2024-06-03 19:31:52,515 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 19:31:52,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:52,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:52,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:31:52,515 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 19:31:52,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:52,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1304420413, now seen corresponding path program 1 times [2024-06-03 19:31:52,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:52,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274500497] [2024-06-03 19:31:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:52,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:53,212 INFO 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 19:31:53,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:53,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274500497] [2024-06-03 19:31:53,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274500497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:53,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:53,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:31:53,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030365764] [2024-06-03 19:31:53,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:53,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:31:53,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:53,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:31:53,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:31:53,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:31:53,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:53,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:53,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:31:53,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:53,708 INFO L124 PetriNetUnfolderBase]: 1358/2141 cut-off events. [2024-06-03 19:31:53,709 INFO L125 PetriNetUnfolderBase]: For 4716/4716 co-relation queries the response was YES. [2024-06-03 19:31:53,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6909 conditions, 2141 events. 1358/2141 cut-off events. For 4716/4716 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10489 event pairs, 526 based on Foata normal form. 4/2135 useless extension candidates. Maximal degree in co-relation 6884. Up to 2004 conditions per place. [2024-06-03 19:31:53,719 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 55 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2024-06-03 19:31:53,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 71 transitions, 457 flow [2024-06-03 19:31:53,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:31:53,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:31:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-03 19:31:53,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:31:53,720 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 267 flow. Second operand 6 states and 108 transitions. [2024-06-03 19:31:53,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 71 transitions, 457 flow [2024-06-03 19:31:53,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 71 transitions, 435 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 19:31:53,724 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 299 flow [2024-06-03 19:31:53,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=299, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-03 19:31:53,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-03 19:31:53,725 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 299 flow [2024-06-03 19:31:53,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:53,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:53,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:53,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:31:53,726 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 19:31:53,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:53,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1082209242, now seen corresponding path program 1 times [2024-06-03 19:31:53,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:53,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413505304] [2024-06-03 19:31:53,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:53,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:54,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:54,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413505304] [2024-06-03 19:31:54,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413505304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:54,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:54,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:31:54,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740944292] [2024-06-03 19:31:54,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:54,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:31:54,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:54,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:31:54,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:31:54,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:31:54,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 299 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 19:31:54,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:54,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:31:54,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:54,869 INFO L124 PetriNetUnfolderBase]: 1571/2366 cut-off events. [2024-06-03 19:31:54,869 INFO L125 PetriNetUnfolderBase]: For 7236/7242 co-relation queries the response was YES. [2024-06-03 19:31:54,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8341 conditions, 2366 events. 1571/2366 cut-off events. For 7236/7242 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11159 event pairs, 635 based on Foata normal form. 8/2371 useless extension candidates. Maximal degree in co-relation 8316. Up to 2253 conditions per place. [2024-06-03 19:31:54,880 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 19 changer transitions 0/78 dead transitions. [2024-06-03 19:31:54,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 78 transitions, 543 flow [2024-06-03 19:31:54,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:31:54,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:31:54,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-03 19:31:54,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-03 19:31:54,881 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 299 flow. Second operand 6 states and 111 transitions. [2024-06-03 19:31:54,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 78 transitions, 543 flow [2024-06-03 19:31:54,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 513 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 19:31:54,885 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 341 flow [2024-06-03 19:31:54,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-03 19:31:54,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-03 19:31:54,886 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 341 flow [2024-06-03 19:31:54,886 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 19:31:54,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:54,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:54,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:31:54,887 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 19:31:54,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:54,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1746584512, now seen corresponding path program 2 times [2024-06-03 19:31:54,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:54,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145782769] [2024-06-03 19:31:54,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:54,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:55,498 INFO 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 19:31:55,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:55,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145782769] [2024-06-03 19:31:55,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145782769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:55,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:55,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:31:55,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692076223] [2024-06-03 19:31:55,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:55,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:31:55,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:55,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:31:55,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:31:55,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:31:55,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 341 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 19:31:55,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:55,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:31:55,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:55,985 INFO L124 PetriNetUnfolderBase]: 1559/2339 cut-off events. [2024-06-03 19:31:55,986 INFO L125 PetriNetUnfolderBase]: For 8650/8654 co-relation queries the response was YES. [2024-06-03 19:31:55,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8510 conditions, 2339 events. 1559/2339 cut-off events. For 8650/8654 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10950 event pairs, 649 based on Foata normal form. 3/2335 useless extension candidates. Maximal degree in co-relation 8484. Up to 2237 conditions per place. [2024-06-03 19:31:55,996 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 49 selfloop transitions, 20 changer transitions 0/73 dead transitions. [2024-06-03 19:31:55,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 517 flow [2024-06-03 19:31:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:31:55,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:31:55,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-03 19:31:55,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-03 19:31:55,997 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 341 flow. Second operand 6 states and 107 transitions. [2024-06-03 19:31:55,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 517 flow [2024-06-03 19:31:56,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 73 transitions, 488 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:31:56,001 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 360 flow [2024-06-03 19:31:56,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=360, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-03 19:31:56,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-03 19:31:56,002 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 360 flow [2024-06-03 19:31:56,002 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 19:31:56,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:56,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:56,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:31:56,003 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 19:31:56,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:56,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1366003396, now seen corresponding path program 1 times [2024-06-03 19:31:56,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:56,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953772219] [2024-06-03 19:31:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:56,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:56,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:56,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953772219] [2024-06-03 19:31:56,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953772219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:56,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:56,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:31:56,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73308341] [2024-06-03 19:31:56,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:56,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:31:56,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:56,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:31:56,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:31:56,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:31:56,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 360 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 19:31:56,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:56,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:31:56,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:57,318 INFO L124 PetriNetUnfolderBase]: 1733/2610 cut-off events. [2024-06-03 19:31:57,318 INFO L125 PetriNetUnfolderBase]: For 11532/11532 co-relation queries the response was YES. [2024-06-03 19:31:57,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9886 conditions, 2610 events. 1733/2610 cut-off events. For 11532/11532 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12474 event pairs, 547 based on Foata normal form. 8/2613 useless extension candidates. Maximal degree in co-relation 9859. Up to 2237 conditions per place. [2024-06-03 19:31:57,331 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 80 selfloop transitions, 39 changer transitions 0/123 dead transitions. [2024-06-03 19:31:57,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 123 transitions, 999 flow [2024-06-03 19:31:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:31:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:31:57,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:31:57,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-03 19:31:57,335 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 360 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:31:57,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 123 transitions, 999 flow [2024-06-03 19:31:57,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 123 transitions, 873 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 19:31:57,345 INFO L231 Difference]: Finished difference. Result has 69 places, 82 transitions, 581 flow [2024-06-03 19:31:57,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=581, PETRI_PLACES=69, PETRI_TRANSITIONS=82} [2024-06-03 19:31:57,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-03 19:31:57,346 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 82 transitions, 581 flow [2024-06-03 19:31:57,346 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 19:31:57,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:57,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:57,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:31:57,347 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 19:31:57,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:57,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1268731286, now seen corresponding path program 2 times [2024-06-03 19:31:57,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:57,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611402093] [2024-06-03 19:31:57,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:57,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:58,064 INFO 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 19:31:58,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:58,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611402093] [2024-06-03 19:31:58,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611402093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:58,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:58,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:31:58,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565273516] [2024-06-03 19:31:58,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:58,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:31:58,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:58,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:31:58,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:31:58,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:31:58,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 82 transitions, 581 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 19:31:58,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:58,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:31:58,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:58,730 INFO L124 PetriNetUnfolderBase]: 1805/2712 cut-off events. [2024-06-03 19:31:58,730 INFO L125 PetriNetUnfolderBase]: For 15092/15094 co-relation queries the response was YES. [2024-06-03 19:31:58,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11329 conditions, 2712 events. 1805/2712 cut-off events. For 15092/15094 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12906 event pairs, 568 based on Foata normal form. 12/2719 useless extension candidates. Maximal degree in co-relation 11298. Up to 2285 conditions per place. [2024-06-03 19:31:58,745 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 66 selfloop transitions, 48 changer transitions 0/118 dead transitions. [2024-06-03 19:31:58,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 118 transitions, 1005 flow [2024-06-03 19:31:58,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:31:58,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:31:58,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-03 19:31:58,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-03 19:31:58,747 INFO L175 Difference]: Start difference. First operand has 69 places, 82 transitions, 581 flow. Second operand 7 states and 132 transitions. [2024-06-03 19:31:58,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 118 transitions, 1005 flow [2024-06-03 19:31:58,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 118 transitions, 977 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-03 19:31:58,760 INFO L231 Difference]: Finished difference. Result has 74 places, 89 transitions, 734 flow [2024-06-03 19:31:58,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=734, PETRI_PLACES=74, PETRI_TRANSITIONS=89} [2024-06-03 19:31:58,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-03 19:31:58,762 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 89 transitions, 734 flow [2024-06-03 19:31:58,762 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 19:31:58,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:58,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:58,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:31:58,763 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 19:31:58,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:58,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1719949398, now seen corresponding path program 3 times [2024-06-03 19:31:58,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:58,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343336670] [2024-06-03 19:31:58,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:58,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:59,424 INFO 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 19:31:59,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:59,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343336670] [2024-06-03 19:31:59,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343336670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:59,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:59,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:31:59,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285672530] [2024-06-03 19:31:59,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:59,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:31:59,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:59,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:31:59,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:31:59,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:31:59,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 89 transitions, 734 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 19:31:59,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:59,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:31:59,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:00,071 INFO L124 PetriNetUnfolderBase]: 1841/2774 cut-off events. [2024-06-03 19:32:00,071 INFO L125 PetriNetUnfolderBase]: For 18384/18390 co-relation queries the response was YES. [2024-06-03 19:32:00,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12348 conditions, 2774 events. 1841/2774 cut-off events. For 18384/18390 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13330 event pairs, 569 based on Foata normal form. 7/2765 useless extension candidates. Maximal degree in co-relation 12315. Up to 2301 conditions per place. [2024-06-03 19:32:00,086 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 65 selfloop transitions, 58 changer transitions 0/127 dead transitions. [2024-06-03 19:32:00,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 127 transitions, 1268 flow [2024-06-03 19:32:00,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:00,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:00,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 19:32:00,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 19:32:00,088 INFO L175 Difference]: Start difference. First operand has 74 places, 89 transitions, 734 flow. Second operand 7 states and 133 transitions. [2024-06-03 19:32:00,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 127 transitions, 1268 flow [2024-06-03 19:32:00,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 127 transitions, 1152 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-03 19:32:00,103 INFO L231 Difference]: Finished difference. Result has 77 places, 99 transitions, 878 flow [2024-06-03 19:32:00,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=878, PETRI_PLACES=77, PETRI_TRANSITIONS=99} [2024-06-03 19:32:00,104 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-03 19:32:00,104 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 99 transitions, 878 flow [2024-06-03 19:32:00,105 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 19:32:00,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:00,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:00,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:32:00,105 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 19:32:00,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:00,106 INFO L85 PathProgramCache]: Analyzing trace with hash 582237618, now seen corresponding path program 4 times [2024-06-03 19:32:00,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:00,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707349018] [2024-06-03 19:32:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:00,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:00,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:00,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707349018] [2024-06-03 19:32:00,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707349018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:00,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:00,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:00,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111699968] [2024-06-03 19:32:00,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:00,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:00,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:00,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:00,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:00,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:00,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 99 transitions, 878 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 19:32:00,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:00,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:00,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:01,455 INFO L124 PetriNetUnfolderBase]: 1825/2744 cut-off events. [2024-06-03 19:32:01,456 INFO L125 PetriNetUnfolderBase]: For 18407/18413 co-relation queries the response was YES. [2024-06-03 19:32:01,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12132 conditions, 2744 events. 1825/2744 cut-off events. For 18407/18413 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13149 event pairs, 560 based on Foata normal form. 7/2737 useless extension candidates. Maximal degree in co-relation 12098. Up to 2294 conditions per place. [2024-06-03 19:32:01,469 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 61 selfloop transitions, 60 changer transitions 0/125 dead transitions. [2024-06-03 19:32:01,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 125 transitions, 1242 flow [2024-06-03 19:32:01,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:01,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:01,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 19:32:01,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-03 19:32:01,471 INFO L175 Difference]: Start difference. First operand has 77 places, 99 transitions, 878 flow. Second operand 7 states and 130 transitions. [2024-06-03 19:32:01,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 125 transitions, 1242 flow [2024-06-03 19:32:01,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 125 transitions, 1155 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-03 19:32:01,489 INFO L231 Difference]: Finished difference. Result has 82 places, 99 transitions, 921 flow [2024-06-03 19:32:01,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=921, PETRI_PLACES=82, PETRI_TRANSITIONS=99} [2024-06-03 19:32:01,490 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-03 19:32:01,490 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 99 transitions, 921 flow [2024-06-03 19:32:01,490 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 19:32:01,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:01,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:01,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:32:01,491 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 19:32:01,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:01,491 INFO L85 PathProgramCache]: Analyzing trace with hash 582477186, now seen corresponding path program 1 times [2024-06-03 19:32:01,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:01,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381724825] [2024-06-03 19:32:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:01,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:02,464 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 19:32:02,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:02,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381724825] [2024-06-03 19:32:02,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381724825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:02,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:02,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:02,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391687093] [2024-06-03 19:32:02,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:02,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:02,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:02,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:02,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:02,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:32:02,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 99 transitions, 921 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:02,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:02,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:32:02,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:03,047 INFO L124 PetriNetUnfolderBase]: 1610/2521 cut-off events. [2024-06-03 19:32:03,047 INFO L125 PetriNetUnfolderBase]: For 17755/17757 co-relation queries the response was YES. [2024-06-03 19:32:03,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11271 conditions, 2521 events. 1610/2521 cut-off events. For 17755/17757 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 12465 event pairs, 527 based on Foata normal form. 4/2507 useless extension candidates. Maximal degree in co-relation 11234. Up to 2349 conditions per place. [2024-06-03 19:32:03,060 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 104 selfloop transitions, 13 changer transitions 0/122 dead transitions. [2024-06-03 19:32:03,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 122 transitions, 1239 flow [2024-06-03 19:32:03,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:03,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 19:32:03,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-03 19:32:03,062 INFO L175 Difference]: Start difference. First operand has 82 places, 99 transitions, 921 flow. Second operand 7 states and 124 transitions. [2024-06-03 19:32:03,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 122 transitions, 1239 flow [2024-06-03 19:32:03,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 122 transitions, 1087 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 19:32:03,077 INFO L231 Difference]: Finished difference. Result has 82 places, 101 transitions, 828 flow [2024-06-03 19:32:03,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=828, PETRI_PLACES=82, PETRI_TRANSITIONS=101} [2024-06-03 19:32:03,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-03 19:32:03,079 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 101 transitions, 828 flow [2024-06-03 19:32:03,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:03,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:03,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:03,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:32:03,079 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:03,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:03,080 INFO L85 PathProgramCache]: Analyzing trace with hash 659927372, now seen corresponding path program 1 times [2024-06-03 19:32:03,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:03,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265927746] [2024-06-03 19:32:03,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:03,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:03,760 INFO 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 19:32:03,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:03,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265927746] [2024-06-03 19:32:03,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265927746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:03,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:03,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:32:03,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205912229] [2024-06-03 19:32:03,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:03,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:32:03,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:03,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:32:03,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:32:03,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:32:03,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 101 transitions, 828 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 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 19:32:03,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:03,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:32:03,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:04,106 INFO L124 PetriNetUnfolderBase]: 1607/2508 cut-off events. [2024-06-03 19:32:04,106 INFO L125 PetriNetUnfolderBase]: For 18812/18814 co-relation queries the response was YES. [2024-06-03 19:32:04,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11102 conditions, 2508 events. 1607/2508 cut-off events. For 18812/18814 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12329 event pairs, 554 based on Foata normal form. 1/2507 useless extension candidates. Maximal degree in co-relation 11065. Up to 2387 conditions per place. [2024-06-03 19:32:04,119 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 99 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2024-06-03 19:32:04,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 112 transitions, 1088 flow [2024-06-03 19:32:04,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:32:04,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:32:04,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-03 19:32:04,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-03 19:32:04,120 INFO L175 Difference]: Start difference. First operand has 82 places, 101 transitions, 828 flow. Second operand 5 states and 87 transitions. [2024-06-03 19:32:04,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 112 transitions, 1088 flow [2024-06-03 19:32:04,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 112 transitions, 1047 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 19:32:04,135 INFO L231 Difference]: Finished difference. Result has 82 places, 104 transitions, 837 flow [2024-06-03 19:32:04,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=837, PETRI_PLACES=82, PETRI_TRANSITIONS=104} [2024-06-03 19:32:04,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-03 19:32:04,135 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 104 transitions, 837 flow [2024-06-03 19:32:04,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 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 19:32:04,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:04,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:04,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:32:04,136 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 19:32:04,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:04,137 INFO L85 PathProgramCache]: Analyzing trace with hash 621032788, now seen corresponding path program 1 times [2024-06-03 19:32:04,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:04,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089130976] [2024-06-03 19:32:04,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:04,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:04,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:04,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089130976] [2024-06-03 19:32:04,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089130976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:04,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:04,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:04,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744539659] [2024-06-03 19:32:04,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:04,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:04,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:04,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:04,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:04,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:04,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 104 transitions, 837 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:04,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:04,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:04,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:05,437 INFO L124 PetriNetUnfolderBase]: 1858/2821 cut-off events. [2024-06-03 19:32:05,437 INFO L125 PetriNetUnfolderBase]: For 25346/25352 co-relation queries the response was YES. [2024-06-03 19:32:05,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13011 conditions, 2821 events. 1858/2821 cut-off events. For 25346/25352 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13706 event pairs, 572 based on Foata normal form. 14/2830 useless extension candidates. Maximal degree in co-relation 12973. Up to 2316 conditions per place. [2024-06-03 19:32:05,451 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 75 selfloop transitions, 63 changer transitions 0/142 dead transitions. [2024-06-03 19:32:05,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 142 transitions, 1339 flow [2024-06-03 19:32:05,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:05,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:05,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-03 19:32:05,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-03 19:32:05,453 INFO L175 Difference]: Start difference. First operand has 82 places, 104 transitions, 837 flow. Second operand 7 states and 136 transitions. [2024-06-03 19:32:05,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 142 transitions, 1339 flow [2024-06-03 19:32:05,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 142 transitions, 1311 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-03 19:32:05,476 INFO L231 Difference]: Finished difference. Result has 86 places, 110 transitions, 1022 flow [2024-06-03 19:32:05,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1022, PETRI_PLACES=86, PETRI_TRANSITIONS=110} [2024-06-03 19:32:05,476 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-03 19:32:05,477 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 110 transitions, 1022 flow [2024-06-03 19:32:05,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:05,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:05,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:05,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:32:05,477 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 19:32:05,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:05,478 INFO L85 PathProgramCache]: Analyzing trace with hash 675965348, now seen corresponding path program 2 times [2024-06-03 19:32:05,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:05,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556971476] [2024-06-03 19:32:05,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:05,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:06,187 INFO 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 19:32:06,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:06,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556971476] [2024-06-03 19:32:06,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556971476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:06,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:06,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:06,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105139926] [2024-06-03 19:32:06,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:06,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:06,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:06,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:06,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:06,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:06,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 110 transitions, 1022 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:06,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:06,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:06,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:06,831 INFO L124 PetriNetUnfolderBase]: 1890/2875 cut-off events. [2024-06-03 19:32:06,831 INFO L125 PetriNetUnfolderBase]: For 29604/29606 co-relation queries the response was YES. [2024-06-03 19:32:06,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13907 conditions, 2875 events. 1890/2875 cut-off events. For 29604/29606 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 14046 event pairs, 558 based on Foata normal form. 8/2878 useless extension candidates. Maximal degree in co-relation 13868. Up to 2345 conditions per place. [2024-06-03 19:32:06,847 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 76 selfloop transitions, 65 changer transitions 0/145 dead transitions. [2024-06-03 19:32:06,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 145 transitions, 1534 flow [2024-06-03 19:32:06,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:06,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:06,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-03 19:32:06,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-03 19:32:06,850 INFO L175 Difference]: Start difference. First operand has 86 places, 110 transitions, 1022 flow. Second operand 7 states and 132 transitions. [2024-06-03 19:32:06,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 145 transitions, 1534 flow [2024-06-03 19:32:06,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 145 transitions, 1319 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:06,871 INFO L231 Difference]: Finished difference. Result has 87 places, 116 transitions, 1038 flow [2024-06-03 19:32:06,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1038, PETRI_PLACES=87, PETRI_TRANSITIONS=116} [2024-06-03 19:32:06,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-03 19:32:06,872 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 116 transitions, 1038 flow [2024-06-03 19:32:06,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:06,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:06,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:06,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:32:06,873 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:06,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:06,873 INFO L85 PathProgramCache]: Analyzing trace with hash 871890792, now seen corresponding path program 3 times [2024-06-03 19:32:06,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:06,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934988423] [2024-06-03 19:32:06,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:06,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:07,577 INFO 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 19:32:07,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:07,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934988423] [2024-06-03 19:32:07,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934988423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:07,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:07,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:07,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71849800] [2024-06-03 19:32:07,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:07,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:07,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:07,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:07,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:07,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:07,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 116 transitions, 1038 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:07,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:07,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:07,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:08,195 INFO L124 PetriNetUnfolderBase]: 1874/2853 cut-off events. [2024-06-03 19:32:08,196 INFO L125 PetriNetUnfolderBase]: For 30799/30808 co-relation queries the response was YES. [2024-06-03 19:32:08,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13810 conditions, 2853 events. 1874/2853 cut-off events. For 30799/30808 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 13903 event pairs, 576 based on Foata normal form. 9/2850 useless extension candidates. Maximal degree in co-relation 13771. Up to 2332 conditions per place. [2024-06-03 19:32:08,210 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 73 selfloop transitions, 62 changer transitions 0/139 dead transitions. [2024-06-03 19:32:08,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 139 transitions, 1382 flow [2024-06-03 19:32:08,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:08,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-03 19:32:08,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-03 19:32:08,211 INFO L175 Difference]: Start difference. First operand has 87 places, 116 transitions, 1038 flow. Second operand 7 states and 125 transitions. [2024-06-03 19:32:08,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 139 transitions, 1382 flow [2024-06-03 19:32:08,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 139 transitions, 1244 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-03 19:32:08,232 INFO L231 Difference]: Finished difference. Result has 90 places, 116 transitions, 1035 flow [2024-06-03 19:32:08,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1035, PETRI_PLACES=90, PETRI_TRANSITIONS=116} [2024-06-03 19:32:08,232 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-03 19:32:08,232 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 116 transitions, 1035 flow [2024-06-03 19:32:08,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:08,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:08,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:08,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:32:08,233 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:08,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:08,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1017086490, now seen corresponding path program 1 times [2024-06-03 19:32:08,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:08,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572366019] [2024-06-03 19:32:08,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:08,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:09,188 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 19:32:09,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:09,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572366019] [2024-06-03 19:32:09,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572366019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:09,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:09,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:32:09,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782784873] [2024-06-03 19:32:09,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:09,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:32:09,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:09,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:32:09,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:32:09,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:32:09,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 116 transitions, 1035 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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 19:32:09,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:09,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:32:09,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:09,631 INFO L124 PetriNetUnfolderBase]: 1664/2626 cut-off events. [2024-06-03 19:32:09,632 INFO L125 PetriNetUnfolderBase]: For 28686/28688 co-relation queries the response was YES. [2024-06-03 19:32:09,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12622 conditions, 2626 events. 1664/2626 cut-off events. For 28686/28688 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 13200 event pairs, 581 based on Foata normal form. 1/2625 useless extension candidates. Maximal degree in co-relation 12582. Up to 2468 conditions per place. [2024-06-03 19:32:09,645 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 112 selfloop transitions, 11 changer transitions 0/128 dead transitions. [2024-06-03 19:32:09,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 128 transitions, 1333 flow [2024-06-03 19:32:09,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:32:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:32:09,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-03 19:32:09,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-03 19:32:09,649 INFO L175 Difference]: Start difference. First operand has 90 places, 116 transitions, 1035 flow. Second operand 6 states and 100 transitions. [2024-06-03 19:32:09,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 128 transitions, 1333 flow [2024-06-03 19:32:09,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 128 transitions, 1150 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 19:32:09,672 INFO L231 Difference]: Finished difference. Result has 89 places, 119 transitions, 912 flow [2024-06-03 19:32:09,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=852, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=912, PETRI_PLACES=89, PETRI_TRANSITIONS=119} [2024-06-03 19:32:09,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-03 19:32:09,673 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 119 transitions, 912 flow [2024-06-03 19:32:09,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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 19:32:09,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:09,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:09,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:32:09,674 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 19:32:09,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:09,675 INFO L85 PathProgramCache]: Analyzing trace with hash -638235399, now seen corresponding path program 1 times [2024-06-03 19:32:09,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:09,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465886810] [2024-06-03 19:32:09,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:09,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:10,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:10,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465886810] [2024-06-03 19:32:10,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465886810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:10,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:10,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:10,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421581677] [2024-06-03 19:32:10,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:10,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:10,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:10,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:10,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:10,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:10,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 119 transitions, 912 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:10,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:10,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:10,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:10,788 INFO L124 PetriNetUnfolderBase]: 1885/2867 cut-off events. [2024-06-03 19:32:10,788 INFO L125 PetriNetUnfolderBase]: For 35410/35415 co-relation queries the response was YES. [2024-06-03 19:32:10,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14013 conditions, 2867 events. 1885/2867 cut-off events. For 35410/35415 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 13957 event pairs, 445 based on Foata normal form. 6/2870 useless extension candidates. Maximal degree in co-relation 13972. Up to 2545 conditions per place. [2024-06-03 19:32:10,802 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 113 selfloop transitions, 32 changer transitions 0/149 dead transitions. [2024-06-03 19:32:10,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 149 transitions, 1388 flow [2024-06-03 19:32:10,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:10,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 19:32:10,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:32:10,804 INFO L175 Difference]: Start difference. First operand has 89 places, 119 transitions, 912 flow. Second operand 7 states and 126 transitions. [2024-06-03 19:32:10,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 149 transitions, 1388 flow [2024-06-03 19:32:10,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 149 transitions, 1350 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:32:10,827 INFO L231 Difference]: Finished difference. Result has 92 places, 123 transitions, 993 flow [2024-06-03 19:32:10,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=993, PETRI_PLACES=92, PETRI_TRANSITIONS=123} [2024-06-03 19:32:10,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-03 19:32:10,828 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 123 transitions, 993 flow [2024-06-03 19:32:10,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:10,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:10,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:10,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:32:10,829 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 19:32:10,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:10,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1956852477, now seen corresponding path program 2 times [2024-06-03 19:32:10,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:10,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748576543] [2024-06-03 19:32:10,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:10,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:11,455 INFO 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 19:32:11,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:11,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748576543] [2024-06-03 19:32:11,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748576543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:11,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:11,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:11,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952234522] [2024-06-03 19:32:11,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:11,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:11,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:11,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:11,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:11,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:11,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 123 transitions, 993 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:11,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:11,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:11,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:12,097 INFO L124 PetriNetUnfolderBase]: 1877/2854 cut-off events. [2024-06-03 19:32:12,098 INFO L125 PetriNetUnfolderBase]: For 38962/38967 co-relation queries the response was YES. [2024-06-03 19:32:12,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14362 conditions, 2854 events. 1877/2854 cut-off events. For 38962/38967 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 13907 event pairs, 583 based on Foata normal form. 6/2857 useless extension candidates. Maximal degree in co-relation 14320. Up to 2621 conditions per place. [2024-06-03 19:32:12,112 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 110 selfloop transitions, 33 changer transitions 0/147 dead transitions. [2024-06-03 19:32:12,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 147 transitions, 1357 flow [2024-06-03 19:32:12,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:12,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:12,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 19:32:12,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-03 19:32:12,113 INFO L175 Difference]: Start difference. First operand has 92 places, 123 transitions, 993 flow. Second operand 7 states and 124 transitions. [2024-06-03 19:32:12,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 147 transitions, 1357 flow [2024-06-03 19:32:12,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 147 transitions, 1297 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-03 19:32:12,136 INFO L231 Difference]: Finished difference. Result has 96 places, 123 transitions, 1008 flow [2024-06-03 19:32:12,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1008, PETRI_PLACES=96, PETRI_TRANSITIONS=123} [2024-06-03 19:32:12,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-03 19:32:12,137 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 123 transitions, 1008 flow [2024-06-03 19:32:12,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:12,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:12,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:12,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:32:12,138 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 19:32:12,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:12,138 INFO L85 PathProgramCache]: Analyzing trace with hash -519902571, now seen corresponding path program 1 times [2024-06-03 19:32:12,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:12,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559355964] [2024-06-03 19:32:12,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:12,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:13,100 INFO 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 19:32:13,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:13,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559355964] [2024-06-03 19:32:13,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559355964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:13,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:13,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:13,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330062305] [2024-06-03 19:32:13,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:13,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:13,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:13,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:13,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:13,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:13,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 123 transitions, 1008 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:13,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:13,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:13,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:13,789 INFO L124 PetriNetUnfolderBase]: 1969/3003 cut-off events. [2024-06-03 19:32:13,789 INFO L125 PetriNetUnfolderBase]: For 47006/47008 co-relation queries the response was YES. [2024-06-03 19:32:13,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15261 conditions, 3003 events. 1969/3003 cut-off events. For 47006/47008 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14850 event pairs, 521 based on Foata normal form. 24/3022 useless extension candidates. Maximal degree in co-relation 15217. Up to 2321 conditions per place. [2024-06-03 19:32:13,806 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 86 selfloop transitions, 70 changer transitions 0/160 dead transitions. [2024-06-03 19:32:13,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 160 transitions, 1458 flow [2024-06-03 19:32:13,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:13,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:13,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:32:13,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-03 19:32:13,809 INFO L175 Difference]: Start difference. First operand has 96 places, 123 transitions, 1008 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:32:13,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 160 transitions, 1458 flow [2024-06-03 19:32:13,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 160 transitions, 1383 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:13,839 INFO L231 Difference]: Finished difference. Result has 98 places, 125 transitions, 1115 flow [2024-06-03 19:32:13,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1115, PETRI_PLACES=98, PETRI_TRANSITIONS=125} [2024-06-03 19:32:13,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-03 19:32:13,840 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 125 transitions, 1115 flow [2024-06-03 19:32:13,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:13,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:13,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:13,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:32:13,840 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:13,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:13,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1465308467, now seen corresponding path program 1 times [2024-06-03 19:32:13,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:13,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499686123] [2024-06-03 19:32:13,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:13,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:14,557 INFO 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 19:32:14,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:14,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499686123] [2024-06-03 19:32:14,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499686123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:14,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:14,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:32:14,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675227747] [2024-06-03 19:32:14,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:14,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:32:14,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:14,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:32:14,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:32:14,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:14,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 125 transitions, 1115 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 19:32:14,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:14,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:14,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:15,044 INFO L124 PetriNetUnfolderBase]: 1974/3022 cut-off events. [2024-06-03 19:32:15,045 INFO L125 PetriNetUnfolderBase]: For 48228/48234 co-relation queries the response was YES. [2024-06-03 19:32:15,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15923 conditions, 3022 events. 1974/3022 cut-off events. For 48228/48234 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14990 event pairs, 612 based on Foata normal form. 7/3027 useless extension candidates. Maximal degree in co-relation 15878. Up to 2916 conditions per place. [2024-06-03 19:32:15,061 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 127 selfloop transitions, 13 changer transitions 0/144 dead transitions. [2024-06-03 19:32:15,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 144 transitions, 1477 flow [2024-06-03 19:32:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:32:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:32:15,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-03 19:32:15,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-03 19:32:15,062 INFO L175 Difference]: Start difference. First operand has 98 places, 125 transitions, 1115 flow. Second operand 6 states and 101 transitions. [2024-06-03 19:32:15,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 144 transitions, 1477 flow [2024-06-03 19:32:15,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 144 transitions, 1329 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:15,096 INFO L231 Difference]: Finished difference. Result has 98 places, 128 transitions, 1034 flow [2024-06-03 19:32:15,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1034, PETRI_PLACES=98, PETRI_TRANSITIONS=128} [2024-06-03 19:32:15,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-03 19:32:15,097 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 128 transitions, 1034 flow [2024-06-03 19:32:15,097 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 19:32:15,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:15,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:15,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:32:15,098 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 19:32:15,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:15,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1867302541, now seen corresponding path program 2 times [2024-06-03 19:32:15,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:15,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767212895] [2024-06-03 19:32:15,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:15,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:16,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:16,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767212895] [2024-06-03 19:32:16,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767212895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:16,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:16,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:16,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331067937] [2024-06-03 19:32:16,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:16,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:16,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:16,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:16,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:16,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:16,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 128 transitions, 1034 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:16,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:16,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:16,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:16,704 INFO L124 PetriNetUnfolderBase]: 1991/3021 cut-off events. [2024-06-03 19:32:16,705 INFO L125 PetriNetUnfolderBase]: For 51897/51903 co-relation queries the response was YES. [2024-06-03 19:32:16,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16042 conditions, 3021 events. 1991/3021 cut-off events. For 51897/51903 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14817 event pairs, 536 based on Foata normal form. 5/3004 useless extension candidates. Maximal degree in co-relation 15996. Up to 2504 conditions per place. [2024-06-03 19:32:16,723 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 81 selfloop transitions, 74 changer transitions 0/159 dead transitions. [2024-06-03 19:32:16,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 159 transitions, 1468 flow [2024-06-03 19:32:16,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:16,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:16,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 19:32:16,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-03 19:32:16,724 INFO L175 Difference]: Start difference. First operand has 98 places, 128 transitions, 1034 flow. Second operand 8 states and 143 transitions. [2024-06-03 19:32:16,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 159 transitions, 1468 flow [2024-06-03 19:32:16,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 159 transitions, 1425 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-03 19:32:16,764 INFO L231 Difference]: Finished difference. Result has 102 places, 130 transitions, 1183 flow [2024-06-03 19:32:16,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1183, PETRI_PLACES=102, PETRI_TRANSITIONS=130} [2024-06-03 19:32:16,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-03 19:32:16,765 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 130 transitions, 1183 flow [2024-06-03 19:32:16,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:16,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:16,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:16,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:32:16,765 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 19:32:16,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:16,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1858731661, now seen corresponding path program 3 times [2024-06-03 19:32:16,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:16,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73902162] [2024-06-03 19:32:16,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:16,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:17,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:17,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73902162] [2024-06-03 19:32:17,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73902162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:17,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:17,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:17,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355915212] [2024-06-03 19:32:17,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:17,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:17,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:17,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:17,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:17,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:17,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 130 transitions, 1183 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:17,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:17,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:17,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:18,357 INFO L124 PetriNetUnfolderBase]: 2008/3048 cut-off events. [2024-06-03 19:32:18,357 INFO L125 PetriNetUnfolderBase]: For 58214/58220 co-relation queries the response was YES. [2024-06-03 19:32:18,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16970 conditions, 3048 events. 2008/3048 cut-off events. For 58214/58220 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15015 event pairs, 485 based on Foata normal form. 5/3031 useless extension candidates. Maximal degree in co-relation 16923. Up to 2293 conditions per place. [2024-06-03 19:32:18,374 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 84 selfloop transitions, 81 changer transitions 0/169 dead transitions. [2024-06-03 19:32:18,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 169 transitions, 1777 flow [2024-06-03 19:32:18,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:32:18,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-03 19:32:18,376 INFO L175 Difference]: Start difference. First operand has 102 places, 130 transitions, 1183 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:32:18,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 169 transitions, 1777 flow [2024-06-03 19:32:18,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 169 transitions, 1605 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:18,419 INFO L231 Difference]: Finished difference. Result has 104 places, 134 transitions, 1256 flow [2024-06-03 19:32:18,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1256, PETRI_PLACES=104, PETRI_TRANSITIONS=134} [2024-06-03 19:32:18,419 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-03 19:32:18,419 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 134 transitions, 1256 flow [2024-06-03 19:32:18,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:18,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:18,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:18,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:32:18,420 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 19:32:18,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:18,421 INFO L85 PathProgramCache]: Analyzing trace with hash -2095203691, now seen corresponding path program 4 times [2024-06-03 19:32:18,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:18,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489229288] [2024-06-03 19:32:18,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:18,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:19,265 INFO 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 19:32:19,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:19,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489229288] [2024-06-03 19:32:19,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489229288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:19,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:19,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:19,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119509746] [2024-06-03 19:32:19,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:19,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:19,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:19,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:19,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:19,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:19,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 134 transitions, 1256 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:19,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:19,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:19,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:19,903 INFO L124 PetriNetUnfolderBase]: 2000/3040 cut-off events. [2024-06-03 19:32:19,903 INFO L125 PetriNetUnfolderBase]: For 62491/62497 co-relation queries the response was YES. [2024-06-03 19:32:19,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17162 conditions, 3040 events. 2000/3040 cut-off events. For 62491/62497 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14933 event pairs, 546 based on Foata normal form. 5/3023 useless extension candidates. Maximal degree in co-relation 17114. Up to 2519 conditions per place. [2024-06-03 19:32:19,923 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 87 selfloop transitions, 72 changer transitions 0/163 dead transitions. [2024-06-03 19:32:19,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 163 transitions, 1664 flow [2024-06-03 19:32:19,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:19,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:19,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:32:19,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:32:19,925 INFO L175 Difference]: Start difference. First operand has 104 places, 134 transitions, 1256 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:32:19,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 163 transitions, 1664 flow [2024-06-03 19:32:19,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 163 transitions, 1472 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-03 19:32:19,983 INFO L231 Difference]: Finished difference. Result has 107 places, 134 transitions, 1216 flow [2024-06-03 19:32:19,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1064, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1216, PETRI_PLACES=107, PETRI_TRANSITIONS=134} [2024-06-03 19:32:19,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-03 19:32:19,984 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 134 transitions, 1216 flow [2024-06-03 19:32:19,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:19,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:19,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:19,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:32:19,985 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:19,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:19,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1464922517, now seen corresponding path program 2 times [2024-06-03 19:32:19,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:19,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470334243] [2024-06-03 19:32:19,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:19,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:20,649 INFO 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 19:32:20,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:20,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470334243] [2024-06-03 19:32:20,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470334243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:20,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:20,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:32:20,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729299856] [2024-06-03 19:32:20,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:20,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:32:20,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:20,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:32:20,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:32:20,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:20,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 134 transitions, 1216 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 19:32:20,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:20,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:20,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:21,156 INFO L124 PetriNetUnfolderBase]: 1997/3065 cut-off events. [2024-06-03 19:32:21,156 INFO L125 PetriNetUnfolderBase]: For 64906/64920 co-relation queries the response was YES. [2024-06-03 19:32:21,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17090 conditions, 3065 events. 1997/3065 cut-off events. For 64906/64920 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15278 event pairs, 610 based on Foata normal form. 13/3074 useless extension candidates. Maximal degree in co-relation 17041. Up to 2948 conditions per place. [2024-06-03 19:32:21,188 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 126 selfloop transitions, 18 changer transitions 0/148 dead transitions. [2024-06-03 19:32:21,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 148 transitions, 1578 flow [2024-06-03 19:32:21,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:32:21,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:32:21,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-03 19:32:21,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-03 19:32:21,190 INFO L175 Difference]: Start difference. First operand has 107 places, 134 transitions, 1216 flow. Second operand 6 states and 97 transitions. [2024-06-03 19:32:21,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 148 transitions, 1578 flow [2024-06-03 19:32:21,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 148 transitions, 1403 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 19:32:21,267 INFO L231 Difference]: Finished difference. Result has 106 places, 137 transitions, 1125 flow [2024-06-03 19:32:21,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1125, PETRI_PLACES=106, PETRI_TRANSITIONS=137} [2024-06-03 19:32:21,268 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-03 19:32:21,269 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 137 transitions, 1125 flow [2024-06-03 19:32:21,269 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 19:32:21,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:21,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:21,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:32:21,286 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:21,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:21,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1470630485, now seen corresponding path program 1 times [2024-06-03 19:32:21,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:21,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792414973] [2024-06-03 19:32:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:21,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:21,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:21,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792414973] [2024-06-03 19:32:21,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792414973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:21,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:21,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:32:21,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193069239] [2024-06-03 19:32:21,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:21,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:32:21,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:21,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:32:21,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:32:22,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:32:22,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 137 transitions, 1125 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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 19:32:22,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:22,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:32:22,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:22,521 INFO L124 PetriNetUnfolderBase]: 1798/2839 cut-off events. [2024-06-03 19:32:22,522 INFO L125 PetriNetUnfolderBase]: For 58051/58053 co-relation queries the response was YES. [2024-06-03 19:32:22,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15419 conditions, 2839 events. 1798/2839 cut-off events. For 58051/58053 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14577 event pairs, 560 based on Foata normal form. 1/2838 useless extension candidates. Maximal degree in co-relation 15369. Up to 2681 conditions per place. [2024-06-03 19:32:22,540 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 136 selfloop transitions, 11 changer transitions 0/152 dead transitions. [2024-06-03 19:32:22,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 152 transitions, 1485 flow [2024-06-03 19:32:22,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:32:22,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:32:22,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-03 19:32:22,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-03 19:32:22,541 INFO L175 Difference]: Start difference. First operand has 106 places, 137 transitions, 1125 flow. Second operand 6 states and 103 transitions. [2024-06-03 19:32:22,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 152 transitions, 1485 flow [2024-06-03 19:32:22,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 152 transitions, 1423 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-03 19:32:22,585 INFO L231 Difference]: Finished difference. Result has 108 places, 140 transitions, 1127 flow [2024-06-03 19:32:22,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1127, PETRI_PLACES=108, PETRI_TRANSITIONS=140} [2024-06-03 19:32:22,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-03 19:32:22,586 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 140 transitions, 1127 flow [2024-06-03 19:32:22,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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 19:32:22,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:22,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:22,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:32:22,587 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 19:32:22,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:22,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1464916565, now seen corresponding path program 2 times [2024-06-03 19:32:22,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:22,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058522097] [2024-06-03 19:32:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:22,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:23,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:23,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058522097] [2024-06-03 19:32:23,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058522097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:23,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:23,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:32:23,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316549387] [2024-06-03 19:32:23,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:23,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:32:23,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:23,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:32:23,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:32:23,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:32:23,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 140 transitions, 1127 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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 19:32:23,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:23,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:32:23,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:23,754 INFO L124 PetriNetUnfolderBase]: 1795/2836 cut-off events. [2024-06-03 19:32:23,754 INFO L125 PetriNetUnfolderBase]: For 60959/60964 co-relation queries the response was YES. [2024-06-03 19:32:23,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15730 conditions, 2836 events. 1795/2836 cut-off events. For 60959/60964 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14588 event pairs, 564 based on Foata normal form. 3/2836 useless extension candidates. Maximal degree in co-relation 15679. Up to 2671 conditions per place. [2024-06-03 19:32:23,771 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 131 selfloop transitions, 16 changer transitions 0/152 dead transitions. [2024-06-03 19:32:23,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 152 transitions, 1483 flow [2024-06-03 19:32:23,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:32:23,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:32:23,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-03 19:32:23,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 19:32:23,773 INFO L175 Difference]: Start difference. First operand has 108 places, 140 transitions, 1127 flow. Second operand 6 states and 102 transitions. [2024-06-03 19:32:23,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 152 transitions, 1483 flow [2024-06-03 19:32:23,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 152 transitions, 1441 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 19:32:23,828 INFO L231 Difference]: Finished difference. Result has 110 places, 143 transitions, 1165 flow [2024-06-03 19:32:23,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1165, PETRI_PLACES=110, PETRI_TRANSITIONS=143} [2024-06-03 19:32:23,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-03 19:32:23,829 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 143 transitions, 1165 flow [2024-06-03 19:32:23,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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 19:32:23,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:23,830 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 19:32:23,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:32:23,830 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 19:32:23,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:23,830 INFO L85 PathProgramCache]: Analyzing trace with hash 444320215, now seen corresponding path program 1 times [2024-06-03 19:32:23,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:23,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357581379] [2024-06-03 19:32:23,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:23,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:24,589 INFO 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 19:32:24,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:24,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357581379] [2024-06-03 19:32:24,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357581379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:24,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:24,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:24,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038350237] [2024-06-03 19:32:24,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:24,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:24,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:24,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:24,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:24,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:24,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 143 transitions, 1165 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:24,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:24,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:24,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:25,276 INFO L124 PetriNetUnfolderBase]: 2118/3271 cut-off events. [2024-06-03 19:32:25,276 INFO L125 PetriNetUnfolderBase]: For 88530/88532 co-relation queries the response was YES. [2024-06-03 19:32:25,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19063 conditions, 3271 events. 2118/3271 cut-off events. For 88530/88532 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16692 event pairs, 403 based on Foata normal form. 16/3282 useless extension candidates. Maximal degree in co-relation 19011. Up to 2043 conditions per place. [2024-06-03 19:32:25,298 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 112 selfloop transitions, 68 changer transitions 0/184 dead transitions. [2024-06-03 19:32:25,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 184 transitions, 1785 flow [2024-06-03 19:32:25,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:25,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:32:25,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 19:32:25,300 INFO L175 Difference]: Start difference. First operand has 110 places, 143 transitions, 1165 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:32:25,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 184 transitions, 1785 flow [2024-06-03 19:32:25,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 184 transitions, 1727 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-03 19:32:25,361 INFO L231 Difference]: Finished difference. Result has 114 places, 145 transitions, 1299 flow [2024-06-03 19:32:25,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1299, PETRI_PLACES=114, PETRI_TRANSITIONS=145} [2024-06-03 19:32:25,362 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-03 19:32:25,363 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 145 transitions, 1299 flow [2024-06-03 19:32:25,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:25,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:25,363 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 19:32:25,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:32:25,363 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 19:32:25,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:25,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1778106203, now seen corresponding path program 2 times [2024-06-03 19:32:25,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:25,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866991270] [2024-06-03 19:32:25,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:25,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:25,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:26,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:26,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866991270] [2024-06-03 19:32:26,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866991270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:26,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:26,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:26,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204874403] [2024-06-03 19:32:26,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:26,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:26,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:26,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:26,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:26,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:26,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 145 transitions, 1299 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:26,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:26,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:26,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:26,719 INFO L124 PetriNetUnfolderBase]: 2176/3364 cut-off events. [2024-06-03 19:32:26,720 INFO L125 PetriNetUnfolderBase]: For 96100/96102 co-relation queries the response was YES. [2024-06-03 19:32:26,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20095 conditions, 3364 events. 2176/3364 cut-off events. For 96100/96102 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17303 event pairs, 575 based on Foata normal form. 16/3375 useless extension candidates. Maximal degree in co-relation 20042. Up to 2550 conditions per place. [2024-06-03 19:32:26,742 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 109 selfloop transitions, 71 changer transitions 0/184 dead transitions. [2024-06-03 19:32:26,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 184 transitions, 1803 flow [2024-06-03 19:32:26,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:26,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:26,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:32:26,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 19:32:26,744 INFO L175 Difference]: Start difference. First operand has 114 places, 145 transitions, 1299 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:32:26,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 184 transitions, 1803 flow [2024-06-03 19:32:26,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 184 transitions, 1720 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:32:26,800 INFO L231 Difference]: Finished difference. Result has 118 places, 146 transitions, 1392 flow [2024-06-03 19:32:26,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1392, PETRI_PLACES=118, PETRI_TRANSITIONS=146} [2024-06-03 19:32:26,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-03 19:32:26,801 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 146 transitions, 1392 flow [2024-06-03 19:32:26,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:26,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:26,801 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 19:32:26,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:32:26,801 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:26,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1242198603, now seen corresponding path program 1 times [2024-06-03 19:32:26,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:26,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015506258] [2024-06-03 19:32:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:26,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:27,516 INFO 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 19:32:27,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:27,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015506258] [2024-06-03 19:32:27,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015506258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:27,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:27,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:27,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013626152] [2024-06-03 19:32:27,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:27,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:27,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:27,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:27,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:27,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:27,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 146 transitions, 1392 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 19:32:27,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:27,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:27,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:28,101 INFO L124 PetriNetUnfolderBase]: 2186/3386 cut-off events. [2024-06-03 19:32:28,102 INFO L125 PetriNetUnfolderBase]: For 98279/98288 co-relation queries the response was YES. [2024-06-03 19:32:28,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20703 conditions, 3386 events. 2186/3386 cut-off events. For 98279/98288 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 17517 event pairs, 651 based on Foata normal form. 10/3393 useless extension candidates. Maximal degree in co-relation 20648. Up to 3150 conditions per place. [2024-06-03 19:32:28,125 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 134 selfloop transitions, 35 changer transitions 0/173 dead transitions. [2024-06-03 19:32:28,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 173 transitions, 1856 flow [2024-06-03 19:32:28,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:28,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:28,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 19:32:28,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-03 19:32:28,126 INFO L175 Difference]: Start difference. First operand has 118 places, 146 transitions, 1392 flow. Second operand 7 states and 124 transitions. [2024-06-03 19:32:28,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 173 transitions, 1856 flow [2024-06-03 19:32:28,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 173 transitions, 1698 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:28,183 INFO L231 Difference]: Finished difference. Result has 119 places, 150 transitions, 1368 flow [2024-06-03 19:32:28,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1368, PETRI_PLACES=119, PETRI_TRANSITIONS=150} [2024-06-03 19:32:28,184 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-03 19:32:28,184 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 150 transitions, 1368 flow [2024-06-03 19:32:28,184 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 19:32:28,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:28,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:28,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:32:28,184 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 19:32:28,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:28,185 INFO L85 PathProgramCache]: Analyzing trace with hash -188055051, now seen corresponding path program 3 times [2024-06-03 19:32:28,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:28,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888354324] [2024-06-03 19:32:28,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:28,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:28,880 INFO 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 19:32:28,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:28,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888354324] [2024-06-03 19:32:28,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888354324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:28,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:28,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:28,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858973405] [2024-06-03 19:32:28,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:28,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:28,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:28,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:28,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:28,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:28,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 150 transitions, 1368 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:28,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:28,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:28,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:29,628 INFO L124 PetriNetUnfolderBase]: 2305/3604 cut-off events. [2024-06-03 19:32:29,628 INFO L125 PetriNetUnfolderBase]: For 114247/114253 co-relation queries the response was YES. [2024-06-03 19:32:29,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22196 conditions, 3604 events. 2305/3604 cut-off events. For 114247/114253 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 19103 event pairs, 475 based on Foata normal form. 22/3621 useless extension candidates. Maximal degree in co-relation 22140. Up to 2667 conditions per place. [2024-06-03 19:32:29,649 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 118 selfloop transitions, 73 changer transitions 0/195 dead transitions. [2024-06-03 19:32:29,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 195 transitions, 2048 flow [2024-06-03 19:32:29,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:29,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:29,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 19:32:29,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-03 19:32:29,651 INFO L175 Difference]: Start difference. First operand has 119 places, 150 transitions, 1368 flow. Second operand 8 states and 157 transitions. [2024-06-03 19:32:29,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 195 transitions, 2048 flow [2024-06-03 19:32:29,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 195 transitions, 1944 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 19:32:29,716 INFO L231 Difference]: Finished difference. Result has 122 places, 152 transitions, 1474 flow [2024-06-03 19:32:29,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1474, PETRI_PLACES=122, PETRI_TRANSITIONS=152} [2024-06-03 19:32:29,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-03 19:32:29,717 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 152 transitions, 1474 flow [2024-06-03 19:32:29,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:29,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:29,717 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 19:32:29,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:32:29,718 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 19:32:29,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:29,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1057313047, now seen corresponding path program 4 times [2024-06-03 19:32:29,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:29,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023744968] [2024-06-03 19:32:29,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:29,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:30,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:30,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023744968] [2024-06-03 19:32:30,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023744968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:30,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:30,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:30,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253865985] [2024-06-03 19:32:30,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:30,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:30,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:30,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:30,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:30,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:30,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 152 transitions, 1474 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:30,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:30,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:30,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:31,315 INFO L124 PetriNetUnfolderBase]: 2380/3729 cut-off events. [2024-06-03 19:32:31,315 INFO L125 PetriNetUnfolderBase]: For 125720/125726 co-relation queries the response was YES. [2024-06-03 19:32:31,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23320 conditions, 3729 events. 2380/3729 cut-off events. For 125720/125726 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 20064 event pairs, 638 based on Foata normal form. 26/3750 useless extension candidates. Maximal degree in co-relation 23263. Up to 3043 conditions per place. [2024-06-03 19:32:31,339 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 118 selfloop transitions, 70 changer transitions 0/192 dead transitions. [2024-06-03 19:32:31,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 192 transitions, 2008 flow [2024-06-03 19:32:31,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:31,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:31,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:32:31,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 19:32:31,341 INFO L175 Difference]: Start difference. First operand has 122 places, 152 transitions, 1474 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:32:31,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 192 transitions, 2008 flow [2024-06-03 19:32:31,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 192 transitions, 1902 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 19:32:31,422 INFO L231 Difference]: Finished difference. Result has 126 places, 153 transitions, 1549 flow [2024-06-03 19:32:31,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1549, PETRI_PLACES=126, PETRI_TRANSITIONS=153} [2024-06-03 19:32:31,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-03 19:32:31,423 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 153 transitions, 1549 flow [2024-06-03 19:32:31,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:31,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:31,423 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 19:32:31,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:32:31,423 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 19:32:31,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:31,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1062675427, now seen corresponding path program 5 times [2024-06-03 19:32:31,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:31,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075829746] [2024-06-03 19:32:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:31,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:32,178 INFO 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 19:32:32,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:32,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075829746] [2024-06-03 19:32:32,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075829746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:32,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:32,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:32,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757372509] [2024-06-03 19:32:32,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:32,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:32,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:32,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:32,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:32,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:32,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 153 transitions, 1549 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:32,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:32,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:32,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:33,097 INFO L124 PetriNetUnfolderBase]: 2455/3846 cut-off events. [2024-06-03 19:32:33,097 INFO L125 PetriNetUnfolderBase]: For 133423/133425 co-relation queries the response was YES. [2024-06-03 19:32:33,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24307 conditions, 3846 events. 2455/3846 cut-off events. For 133423/133425 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20942 event pairs, 634 based on Foata normal form. 20/3861 useless extension candidates. Maximal degree in co-relation 24248. Up to 3168 conditions per place. [2024-06-03 19:32:33,124 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 120 selfloop transitions, 66 changer transitions 0/190 dead transitions. [2024-06-03 19:32:33,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 190 transitions, 2067 flow [2024-06-03 19:32:33,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:33,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:33,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 19:32:33,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-03 19:32:33,127 INFO L175 Difference]: Start difference. First operand has 126 places, 153 transitions, 1549 flow. Second operand 8 states and 148 transitions. [2024-06-03 19:32:33,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 190 transitions, 2067 flow [2024-06-03 19:32:33,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 190 transitions, 1916 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:33,229 INFO L231 Difference]: Finished difference. Result has 128 places, 154 transitions, 1571 flow [2024-06-03 19:32:33,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1571, PETRI_PLACES=128, PETRI_TRANSITIONS=154} [2024-06-03 19:32:33,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-03 19:32:33,230 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 154 transitions, 1571 flow [2024-06-03 19:32:33,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:33,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:33,230 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 19:32:33,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:32:33,231 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:33,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:33,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1062890629, now seen corresponding path program 1 times [2024-06-03 19:32:33,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:33,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52052812] [2024-06-03 19:32:33,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:33,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:34,160 INFO 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 19:32:34,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:34,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52052812] [2024-06-03 19:32:34,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52052812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:34,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:34,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:34,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201668646] [2024-06-03 19:32:34,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:34,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:34,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:34,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:34,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:34,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:34,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 154 transitions, 1571 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:34,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:34,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:34,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:35,017 INFO L124 PetriNetUnfolderBase]: 2496/3919 cut-off events. [2024-06-03 19:32:35,018 INFO L125 PetriNetUnfolderBase]: For 137725/137727 co-relation queries the response was YES. [2024-06-03 19:32:35,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24780 conditions, 3919 events. 2496/3919 cut-off events. For 137725/137727 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21475 event pairs, 640 based on Foata normal form. 12/3926 useless extension candidates. Maximal degree in co-relation 24720. Up to 2834 conditions per place. [2024-06-03 19:32:35,043 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 119 selfloop transitions, 69 changer transitions 0/192 dead transitions. [2024-06-03 19:32:35,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 192 transitions, 2097 flow [2024-06-03 19:32:35,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:35,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:32:35,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-03 19:32:35,045 INFO L175 Difference]: Start difference. First operand has 128 places, 154 transitions, 1571 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:32:35,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 192 transitions, 2097 flow [2024-06-03 19:32:35,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 192 transitions, 1952 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:35,145 INFO L231 Difference]: Finished difference. Result has 130 places, 155 transitions, 1603 flow [2024-06-03 19:32:35,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1603, PETRI_PLACES=130, PETRI_TRANSITIONS=155} [2024-06-03 19:32:35,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-03 19:32:35,146 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 155 transitions, 1603 flow [2024-06-03 19:32:35,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:35,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:35,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:35,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:32:35,147 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:35,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:35,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1477780275, now seen corresponding path program 2 times [2024-06-03 19:32:35,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:35,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380418845] [2024-06-03 19:32:35,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:35,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:35,827 INFO 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 19:32:35,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:35,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380418845] [2024-06-03 19:32:35,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380418845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:35,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:35,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:35,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908328118] [2024-06-03 19:32:35,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:35,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:35,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:35,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:35,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:35,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:35,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 155 transitions, 1603 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 19:32:35,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:35,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:35,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:36,446 INFO L124 PetriNetUnfolderBase]: 2524/3968 cut-off events. [2024-06-03 19:32:36,446 INFO L125 PetriNetUnfolderBase]: For 140467/140472 co-relation queries the response was YES. [2024-06-03 19:32:36,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25257 conditions, 3968 events. 2524/3968 cut-off events. For 140467/140472 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21926 event pairs, 764 based on Foata normal form. 4/3969 useless extension candidates. Maximal degree in co-relation 25196. Up to 3673 conditions per place. [2024-06-03 19:32:36,473 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 138 selfloop transitions, 38 changer transitions 0/180 dead transitions. [2024-06-03 19:32:36,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 180 transitions, 2183 flow [2024-06-03 19:32:36,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 19:32:36,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-03 19:32:36,475 INFO L175 Difference]: Start difference. First operand has 130 places, 155 transitions, 1603 flow. Second operand 7 states and 120 transitions. [2024-06-03 19:32:36,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 180 transitions, 2183 flow [2024-06-03 19:32:36,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 180 transitions, 2026 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:36,580 INFO L231 Difference]: Finished difference. Result has 132 places, 163 transitions, 1667 flow [2024-06-03 19:32:36,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1667, PETRI_PLACES=132, PETRI_TRANSITIONS=163} [2024-06-03 19:32:36,580 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-03 19:32:36,581 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 163 transitions, 1667 flow [2024-06-03 19:32:36,581 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 19:32:36,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:36,581 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 19:32:36,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:32:36,581 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:36,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:36,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1477780647, now seen corresponding path program 1 times [2024-06-03 19:32:36,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:36,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724700920] [2024-06-03 19:32:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:36,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:37,779 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 19:32:37,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:37,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724700920] [2024-06-03 19:32:37,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724700920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:37,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:37,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:37,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719450972] [2024-06-03 19:32:37,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:37,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:37,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:37,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:37,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:37,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:37,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 163 transitions, 1667 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 19:32:37,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:37,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:37,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:38,408 INFO L124 PetriNetUnfolderBase]: 2529/3983 cut-off events. [2024-06-03 19:32:38,408 INFO L125 PetriNetUnfolderBase]: For 146497/146503 co-relation queries the response was YES. [2024-06-03 19:32:38,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25709 conditions, 3983 events. 2529/3983 cut-off events. For 146497/146503 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21982 event pairs, 778 based on Foata normal form. 7/3988 useless extension candidates. Maximal degree in co-relation 25646. Up to 3835 conditions per place. [2024-06-03 19:32:38,441 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 163 selfloop transitions, 16 changer transitions 0/183 dead transitions. [2024-06-03 19:32:38,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 183 transitions, 2123 flow [2024-06-03 19:32:38,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:38,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:38,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-03 19:32:38,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-03 19:32:38,443 INFO L175 Difference]: Start difference. First operand has 132 places, 163 transitions, 1667 flow. Second operand 7 states and 113 transitions. [2024-06-03 19:32:38,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 183 transitions, 2123 flow [2024-06-03 19:32:38,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 183 transitions, 2037 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-03 19:32:38,571 INFO L231 Difference]: Finished difference. Result has 136 places, 166 transitions, 1667 flow [2024-06-03 19:32:38,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1667, PETRI_PLACES=136, PETRI_TRANSITIONS=166} [2024-06-03 19:32:38,572 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-03 19:32:38,572 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 166 transitions, 1667 flow [2024-06-03 19:32:38,572 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 19:32:38,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:38,572 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 19:32:38,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:32:38,573 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:38,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:38,573 INFO L85 PathProgramCache]: Analyzing trace with hash -170133183, now seen corresponding path program 6 times [2024-06-03 19:32:38,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:38,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106123028] [2024-06-03 19:32:38,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:38,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:39,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:39,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106123028] [2024-06-03 19:32:39,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106123028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:39,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:39,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:39,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943692193] [2024-06-03 19:32:39,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:39,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:39,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:39,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:39,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:39,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:39,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 166 transitions, 1667 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:39,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:39,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:39,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:40,183 INFO L124 PetriNetUnfolderBase]: 2493/3924 cut-off events. [2024-06-03 19:32:40,183 INFO L125 PetriNetUnfolderBase]: For 152209/152218 co-relation queries the response was YES. [2024-06-03 19:32:40,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25209 conditions, 3924 events. 2493/3924 cut-off events. For 152209/152218 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 21537 event pairs, 649 based on Foata normal form. 23/3935 useless extension candidates. Maximal degree in co-relation 25144. Up to 3235 conditions per place. [2024-06-03 19:32:40,214 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 131 selfloop transitions, 63 changer transitions 0/198 dead transitions. [2024-06-03 19:32:40,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 198 transitions, 2163 flow [2024-06-03 19:32:40,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:40,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:40,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 19:32:40,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-03 19:32:40,216 INFO L175 Difference]: Start difference. First operand has 136 places, 166 transitions, 1667 flow. Second operand 8 states and 143 transitions. [2024-06-03 19:32:40,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 198 transitions, 2163 flow [2024-06-03 19:32:40,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 198 transitions, 2087 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-03 19:32:40,396 INFO L231 Difference]: Finished difference. Result has 139 places, 166 transitions, 1726 flow [2024-06-03 19:32:40,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1726, PETRI_PLACES=139, PETRI_TRANSITIONS=166} [2024-06-03 19:32:40,396 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-03 19:32:40,396 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 166 transitions, 1726 flow [2024-06-03 19:32:40,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:40,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:40,397 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 19:32:40,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:32:40,397 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 19:32:40,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:40,398 INFO L85 PathProgramCache]: Analyzing trace with hash -310240349, now seen corresponding path program 2 times [2024-06-03 19:32:40,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:40,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799075299] [2024-06-03 19:32:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:40,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:41,446 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 19:32:41,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:41,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799075299] [2024-06-03 19:32:41,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799075299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:41,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:41,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:32:41,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445864655] [2024-06-03 19:32:41,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:41,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:32:41,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:41,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:32:41,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:32:41,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:41,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 166 transitions, 1726 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:41,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:41,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:41,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:42,254 INFO L124 PetriNetUnfolderBase]: 2473/3889 cut-off events. [2024-06-03 19:32:42,254 INFO L125 PetriNetUnfolderBase]: For 148487/148492 co-relation queries the response was YES. [2024-06-03 19:32:42,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25048 conditions, 3889 events. 2473/3889 cut-off events. For 148487/148492 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21173 event pairs, 587 based on Foata normal form. 16/3893 useless extension candidates. Maximal degree in co-relation 24982. Up to 3113 conditions per place. [2024-06-03 19:32:42,283 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 131 selfloop transitions, 68 changer transitions 0/203 dead transitions. [2024-06-03 19:32:42,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 203 transitions, 2273 flow [2024-06-03 19:32:42,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:32:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:32:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 19:32:42,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-03 19:32:42,285 INFO L175 Difference]: Start difference. First operand has 139 places, 166 transitions, 1726 flow. Second operand 9 states and 156 transitions. [2024-06-03 19:32:42,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 203 transitions, 2273 flow [2024-06-03 19:32:42,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 203 transitions, 2115 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-03 19:32:42,428 INFO L231 Difference]: Finished difference. Result has 142 places, 168 transitions, 1736 flow [2024-06-03 19:32:42,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1571, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1736, PETRI_PLACES=142, PETRI_TRANSITIONS=168} [2024-06-03 19:32:42,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-03 19:32:42,429 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 168 transitions, 1736 flow [2024-06-03 19:32:42,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:42,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:42,430 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 19:32:42,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:32:42,430 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 19:32:42,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:42,430 INFO L85 PathProgramCache]: Analyzing trace with hash 634378569, now seen corresponding path program 3 times [2024-06-03 19:32:42,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:42,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096093069] [2024-06-03 19:32:42,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:42,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:43,253 INFO 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 19:32:43,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:43,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096093069] [2024-06-03 19:32:43,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096093069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:43,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:43,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:43,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463070783] [2024-06-03 19:32:43,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:43,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:43,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:43,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:43,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:43,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:43,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 168 transitions, 1736 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:43,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:43,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:43,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:43,947 INFO L124 PetriNetUnfolderBase]: 2453/3856 cut-off events. [2024-06-03 19:32:43,947 INFO L125 PetriNetUnfolderBase]: For 148126/148137 co-relation queries the response was YES. [2024-06-03 19:32:43,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24516 conditions, 3856 events. 2453/3856 cut-off events. For 148126/148137 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 20963 event pairs, 453 based on Foata normal form. 16/3860 useless extension candidates. Maximal degree in co-relation 24448. Up to 2431 conditions per place. [2024-06-03 19:32:43,976 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 122 selfloop transitions, 74 changer transitions 0/200 dead transitions. [2024-06-03 19:32:43,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 200 transitions, 2180 flow [2024-06-03 19:32:43,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:43,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:43,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 19:32:43,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-03 19:32:43,978 INFO L175 Difference]: Start difference. First operand has 142 places, 168 transitions, 1736 flow. Second operand 8 states and 143 transitions. [2024-06-03 19:32:43,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 200 transitions, 2180 flow [2024-06-03 19:32:44,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 200 transitions, 1968 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 19:32:44,112 INFO L231 Difference]: Finished difference. Result has 142 places, 167 transitions, 1616 flow [2024-06-03 19:32:44,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1616, PETRI_PLACES=142, PETRI_TRANSITIONS=167} [2024-06-03 19:32:44,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-03 19:32:44,113 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 167 transitions, 1616 flow [2024-06-03 19:32:44,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:44,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:44,113 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 19:32:44,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:32:44,114 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:44,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:44,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1612859775, now seen corresponding path program 2 times [2024-06-03 19:32:44,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:44,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102925862] [2024-06-03 19:32:44,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:44,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:45,150 INFO 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 19:32:45,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:45,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102925862] [2024-06-03 19:32:45,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102925862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:45,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:45,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:45,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268461630] [2024-06-03 19:32:45,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:45,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:45,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:45,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:45,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:45,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:45,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 167 transitions, 1616 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 19:32:45,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:45,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:45,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:45,751 INFO L124 PetriNetUnfolderBase]: 2458/3875 cut-off events. [2024-06-03 19:32:45,751 INFO L125 PetriNetUnfolderBase]: For 147990/148004 co-relation queries the response was YES. [2024-06-03 19:32:45,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24307 conditions, 3875 events. 2458/3875 cut-off events. For 147990/148004 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21205 event pairs, 723 based on Foata normal form. 13/3884 useless extension candidates. Maximal degree in co-relation 24238. Up to 3706 conditions per place. [2024-06-03 19:32:45,780 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 155 selfloop transitions, 28 changer transitions 0/187 dead transitions. [2024-06-03 19:32:45,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 187 transitions, 2205 flow [2024-06-03 19:32:45,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:45,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-03 19:32:45,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-03 19:32:45,782 INFO L175 Difference]: Start difference. First operand has 142 places, 167 transitions, 1616 flow. Second operand 7 states and 110 transitions. [2024-06-03 19:32:45,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 187 transitions, 2205 flow [2024-06-03 19:32:45,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 187 transitions, 1998 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 19:32:45,901 INFO L231 Difference]: Finished difference. Result has 143 places, 175 transitions, 1596 flow [2024-06-03 19:32:45,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1596, PETRI_PLACES=143, PETRI_TRANSITIONS=175} [2024-06-03 19:32:45,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-03 19:32:45,903 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 175 transitions, 1596 flow [2024-06-03 19:32:45,903 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 19:32:45,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:45,903 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 19:32:45,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:32:45,903 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 19:32:45,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:45,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1832043687, now seen corresponding path program 3 times [2024-06-03 19:32:45,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:45,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13771282] [2024-06-03 19:32:45,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:45,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:46,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:46,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13771282] [2024-06-03 19:32:46,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13771282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:46,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:46,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:46,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574928380] [2024-06-03 19:32:46,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:46,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:46,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:46,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:46,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:47,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:47,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 175 transitions, 1596 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 19:32:47,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:47,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:47,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:47,606 INFO L124 PetriNetUnfolderBase]: 2455/3871 cut-off events. [2024-06-03 19:32:47,607 INFO L125 PetriNetUnfolderBase]: For 153219/153233 co-relation queries the response was YES. [2024-06-03 19:32:47,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23886 conditions, 3871 events. 2455/3871 cut-off events. For 153219/153233 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21106 event pairs, 723 based on Foata normal form. 13/3880 useless extension candidates. Maximal degree in co-relation 23816. Up to 3712 conditions per place. [2024-06-03 19:32:47,634 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 162 selfloop transitions, 21 changer transitions 0/187 dead transitions. [2024-06-03 19:32:47,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 187 transitions, 2008 flow [2024-06-03 19:32:47,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:47,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:47,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-03 19:32:47,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-03 19:32:47,635 INFO L175 Difference]: Start difference. First operand has 143 places, 175 transitions, 1596 flow. Second operand 7 states and 108 transitions. [2024-06-03 19:32:47,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 187 transitions, 2008 flow [2024-06-03 19:32:47,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 187 transitions, 1911 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-03 19:32:47,758 INFO L231 Difference]: Finished difference. Result has 147 places, 176 transitions, 1556 flow [2024-06-03 19:32:47,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1499, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1556, PETRI_PLACES=147, PETRI_TRANSITIONS=176} [2024-06-03 19:32:47,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-03 19:32:47,759 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 176 transitions, 1556 flow [2024-06-03 19:32:47,762 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 19:32:47,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:47,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:47,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:32:47,763 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 19:32:47,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:47,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1832043315, now seen corresponding path program 3 times [2024-06-03 19:32:47,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:47,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114372331] [2024-06-03 19:32:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:47,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:48,486 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 19:32:48,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:48,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114372331] [2024-06-03 19:32:48,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114372331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:48,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:48,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:48,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798567799] [2024-06-03 19:32:48,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:48,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:48,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:48,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:48,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:48,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:48,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 176 transitions, 1556 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 19:32:48,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:48,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:48,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:49,115 INFO L124 PetriNetUnfolderBase]: 2459/3866 cut-off events. [2024-06-03 19:32:49,116 INFO L125 PetriNetUnfolderBase]: For 159708/159719 co-relation queries the response was YES. [2024-06-03 19:32:49,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24040 conditions, 3866 events. 2459/3866 cut-off events. For 159708/159719 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21059 event pairs, 734 based on Foata normal form. 6/3860 useless extension candidates. Maximal degree in co-relation 23968. Up to 3538 conditions per place. [2024-06-03 19:32:49,147 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 140 selfloop transitions, 52 changer transitions 0/196 dead transitions. [2024-06-03 19:32:49,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 196 transitions, 2270 flow [2024-06-03 19:32:49,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:49,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:49,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-03 19:32:49,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-03 19:32:49,149 INFO L175 Difference]: Start difference. First operand has 147 places, 176 transitions, 1556 flow. Second operand 7 states and 117 transitions. [2024-06-03 19:32:49,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 196 transitions, 2270 flow [2024-06-03 19:32:49,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 196 transitions, 2224 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 19:32:49,275 INFO L231 Difference]: Finished difference. Result has 150 places, 184 transitions, 1774 flow [2024-06-03 19:32:49,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1510, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1774, PETRI_PLACES=150, PETRI_TRANSITIONS=184} [2024-06-03 19:32:49,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-03 19:32:49,276 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 184 transitions, 1774 flow [2024-06-03 19:32:49,276 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 19:32:49,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:49,277 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 19:32:49,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:32:49,277 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 19:32:49,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:49,277 INFO L85 PathProgramCache]: Analyzing trace with hash 198599691, now seen corresponding path program 1 times [2024-06-03 19:32:49,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:49,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079449166] [2024-06-03 19:32:49,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:49,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:49,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:49,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079449166] [2024-06-03 19:32:49,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079449166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:49,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:49,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:49,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783456517] [2024-06-03 19:32:49,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:49,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:49,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:49,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:49,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:50,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:32:50,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 184 transitions, 1774 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:50,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:50,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:32:50,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:50,622 INFO L124 PetriNetUnfolderBase]: 2365/3777 cut-off events. [2024-06-03 19:32:50,623 INFO L125 PetriNetUnfolderBase]: For 171386/171390 co-relation queries the response was YES. [2024-06-03 19:32:50,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24453 conditions, 3777 events. 2365/3777 cut-off events. For 171386/171390 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 20930 event pairs, 698 based on Foata normal form. 3/3778 useless extension candidates. Maximal degree in co-relation 24379. Up to 3537 conditions per place. [2024-06-03 19:32:50,655 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 180 selfloop transitions, 17 changer transitions 0/206 dead transitions. [2024-06-03 19:32:50,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 206 transitions, 2272 flow [2024-06-03 19:32:50,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:50,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:50,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 19:32:50,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-03 19:32:50,656 INFO L175 Difference]: Start difference. First operand has 150 places, 184 transitions, 1774 flow. Second operand 7 states and 120 transitions. [2024-06-03 19:32:50,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 206 transitions, 2272 flow [2024-06-03 19:32:50,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 206 transitions, 2108 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-03 19:32:50,785 INFO L231 Difference]: Finished difference. Result has 154 places, 190 transitions, 1720 flow [2024-06-03 19:32:50,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1612, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1720, PETRI_PLACES=154, PETRI_TRANSITIONS=190} [2024-06-03 19:32:50,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-03 19:32:50,786 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 190 transitions, 1720 flow [2024-06-03 19:32:50,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:50,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:50,786 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 19:32:50,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:32:50,787 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:50,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:50,787 INFO L85 PathProgramCache]: Analyzing trace with hash 106266111, now seen corresponding path program 1 times [2024-06-03 19:32:50,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:50,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142759724] [2024-06-03 19:32:50,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:50,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:51,794 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 19:32:51,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:51,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142759724] [2024-06-03 19:32:51,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142759724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:51,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:51,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:51,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186629348] [2024-06-03 19:32:51,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:51,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:51,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:51,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:51,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:51,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:32:51,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 190 transitions, 1720 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:51,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:51,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:32:51,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:52,457 INFO L124 PetriNetUnfolderBase]: 2375/3786 cut-off events. [2024-06-03 19:32:52,458 INFO L125 PetriNetUnfolderBase]: For 178251/178255 co-relation queries the response was YES. [2024-06-03 19:32:52,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24728 conditions, 3786 events. 2375/3786 cut-off events. For 178251/178255 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 20885 event pairs, 697 based on Foata normal form. 4/3788 useless extension candidates. Maximal degree in co-relation 24652. Up to 3566 conditions per place. [2024-06-03 19:32:52,491 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 183 selfloop transitions, 14 changer transitions 0/206 dead transitions. [2024-06-03 19:32:52,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 206 transitions, 2190 flow [2024-06-03 19:32:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:52,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:52,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-03 19:32:52,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-03 19:32:52,494 INFO L175 Difference]: Start difference. First operand has 154 places, 190 transitions, 1720 flow. Second operand 7 states and 116 transitions. [2024-06-03 19:32:52,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 206 transitions, 2190 flow [2024-06-03 19:32:52,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 206 transitions, 2138 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-03 19:32:52,663 INFO L231 Difference]: Finished difference. Result has 158 places, 193 transitions, 1746 flow [2024-06-03 19:32:52,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1746, PETRI_PLACES=158, PETRI_TRANSITIONS=193} [2024-06-03 19:32:52,665 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-03 19:32:52,665 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 193 transitions, 1746 flow [2024-06-03 19:32:52,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:52,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:52,666 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 19:32:52,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:32:52,666 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:52,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:52,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1655096493, now seen corresponding path program 2 times [2024-06-03 19:32:52,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:52,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038315706] [2024-06-03 19:32:52,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:52,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:53,354 INFO 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 19:32:53,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:53,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038315706] [2024-06-03 19:32:53,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038315706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:53,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:53,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:53,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675833192] [2024-06-03 19:32:53,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:53,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:53,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:53,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:53,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:53,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:32:53,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 193 transitions, 1746 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:53,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:53,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:32:53,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:54,049 INFO L124 PetriNetUnfolderBase]: 2393/3811 cut-off events. [2024-06-03 19:32:54,049 INFO L125 PetriNetUnfolderBase]: For 185827/185831 co-relation queries the response was YES. [2024-06-03 19:32:54,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25333 conditions, 3811 events. 2393/3811 cut-off events. For 185827/185831 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21035 event pairs, 697 based on Foata normal form. 3/3812 useless extension candidates. Maximal degree in co-relation 25256. Up to 3563 conditions per place. [2024-06-03 19:32:54,081 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 181 selfloop transitions, 24 changer transitions 0/214 dead transitions. [2024-06-03 19:32:54,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 214 transitions, 2384 flow [2024-06-03 19:32:54,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:54,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:54,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-03 19:32:54,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-03 19:32:54,083 INFO L175 Difference]: Start difference. First operand has 158 places, 193 transitions, 1746 flow. Second operand 7 states and 121 transitions. [2024-06-03 19:32:54,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 214 transitions, 2384 flow [2024-06-03 19:32:54,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 214 transitions, 2330 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 19:32:54,241 INFO L231 Difference]: Finished difference. Result has 160 places, 199 transitions, 1848 flow [2024-06-03 19:32:54,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1848, PETRI_PLACES=160, PETRI_TRANSITIONS=199} [2024-06-03 19:32:54,241 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-03 19:32:54,241 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 199 transitions, 1848 flow [2024-06-03 19:32:54,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:54,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:54,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:54,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 19:32:54,242 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:54,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:54,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1832234709, now seen corresponding path program 2 times [2024-06-03 19:32:54,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:54,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549868426] [2024-06-03 19:32:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:54,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:55,300 INFO 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 19:32:55,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:55,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549868426] [2024-06-03 19:32:55,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549868426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:55,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:55,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:55,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380327384] [2024-06-03 19:32:55,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:55,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:55,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:55,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:55,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:55,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:32:55,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 199 transitions, 1848 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:55,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:55,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:32:55,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:56,024 INFO L124 PetriNetUnfolderBase]: 2405/3831 cut-off events. [2024-06-03 19:32:56,024 INFO L125 PetriNetUnfolderBase]: For 197582/197592 co-relation queries the response was YES. [2024-06-03 19:32:56,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25944 conditions, 3831 events. 2405/3831 cut-off events. For 197582/197592 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21193 event pairs, 700 based on Foata normal form. 8/3836 useless extension candidates. Maximal degree in co-relation 25866. Up to 3574 conditions per place. [2024-06-03 19:32:56,056 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 180 selfloop transitions, 29 changer transitions 0/218 dead transitions. [2024-06-03 19:32:56,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 218 transitions, 2510 flow [2024-06-03 19:32:56,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:56,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:56,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-03 19:32:56,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-03 19:32:56,058 INFO L175 Difference]: Start difference. First operand has 160 places, 199 transitions, 1848 flow. Second operand 7 states and 118 transitions. [2024-06-03 19:32:56,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 218 transitions, 2510 flow [2024-06-03 19:32:56,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 218 transitions, 2438 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-03 19:32:56,236 INFO L231 Difference]: Finished difference. Result has 164 places, 206 transitions, 1984 flow [2024-06-03 19:32:56,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1984, PETRI_PLACES=164, PETRI_TRANSITIONS=206} [2024-06-03 19:32:56,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-03 19:32:56,237 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 206 transitions, 1984 flow [2024-06-03 19:32:56,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:56,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:56,237 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 19:32:56,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 19:32:56,238 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:56,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:56,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1354703775, now seen corresponding path program 3 times [2024-06-03 19:32:56,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:56,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58336790] [2024-06-03 19:32:56,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:56,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:57,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:57,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58336790] [2024-06-03 19:32:57,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58336790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:57,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:57,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:57,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324174889] [2024-06-03 19:32:57,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:57,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:57,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:57,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:57,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:57,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:32:57,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 206 transitions, 1984 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:57,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:57,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:32:57,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:57,896 INFO L124 PetriNetUnfolderBase]: 2396/3819 cut-off events. [2024-06-03 19:32:57,896 INFO L125 PetriNetUnfolderBase]: For 202867/202877 co-relation queries the response was YES. [2024-06-03 19:32:57,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26132 conditions, 3819 events. 2396/3819 cut-off events. For 202867/202877 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21115 event pairs, 700 based on Foata normal form. 8/3824 useless extension candidates. Maximal degree in co-relation 26052. Up to 3591 conditions per place. [2024-06-03 19:32:57,929 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 190 selfloop transitions, 19 changer transitions 0/218 dead transitions. [2024-06-03 19:32:57,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 218 transitions, 2462 flow [2024-06-03 19:32:57,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:57,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:57,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-03 19:32:57,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-03 19:32:57,930 INFO L175 Difference]: Start difference. First operand has 164 places, 206 transitions, 1984 flow. Second operand 7 states and 115 transitions. [2024-06-03 19:32:57,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 218 transitions, 2462 flow [2024-06-03 19:32:58,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 218 transitions, 2398 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-03 19:32:58,187 INFO L231 Difference]: Finished difference. Result has 168 places, 208 transitions, 2000 flow [2024-06-03 19:32:58,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1922, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2000, PETRI_PLACES=168, PETRI_TRANSITIONS=208} [2024-06-03 19:32:58,187 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-03 19:32:58,188 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 208 transitions, 2000 flow [2024-06-03 19:32:58,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:58,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:58,188 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 19:32:58,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 19:32:58,188 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:58,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:58,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1832228013, now seen corresponding path program 3 times [2024-06-03 19:32:58,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:58,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411910481] [2024-06-03 19:32:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:58,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:59,019 INFO 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 19:32:59,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:59,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411910481] [2024-06-03 19:32:59,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411910481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:59,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:59,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:59,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222014853] [2024-06-03 19:32:59,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:59,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:59,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:59,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:59,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:59,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:32:59,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 208 transitions, 2000 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:59,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:59,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:32:59,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:59,654 INFO L124 PetriNetUnfolderBase]: 2363/3785 cut-off events. [2024-06-03 19:32:59,655 INFO L125 PetriNetUnfolderBase]: For 208292/208299 co-relation queries the response was YES. [2024-06-03 19:32:59,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25978 conditions, 3785 events. 2363/3785 cut-off events. For 208292/208299 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 21110 event pairs, 689 based on Foata normal form. 3/3784 useless extension candidates. Maximal degree in co-relation 25896. Up to 3522 conditions per place. [2024-06-03 19:32:59,687 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 183 selfloop transitions, 31 changer transitions 0/223 dead transitions. [2024-06-03 19:32:59,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 223 transitions, 2610 flow [2024-06-03 19:32:59,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 19:32:59,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-03 19:32:59,689 INFO L175 Difference]: Start difference. First operand has 168 places, 208 transitions, 2000 flow. Second operand 7 states and 120 transitions. [2024-06-03 19:32:59,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 223 transitions, 2610 flow [2024-06-03 19:32:59,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 223 transitions, 2548 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 19:32:59,882 INFO L231 Difference]: Finished difference. Result has 170 places, 211 transitions, 2066 flow [2024-06-03 19:32:59,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1938, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2066, PETRI_PLACES=170, PETRI_TRANSITIONS=211} [2024-06-03 19:32:59,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-03 19:32:59,883 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 211 transitions, 2066 flow [2024-06-03 19:32:59,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:59,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:59,883 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 19:32:59,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 19:32:59,883 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:59,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:59,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1832474277, now seen corresponding path program 1 times [2024-06-03 19:32:59,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:59,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380526309] [2024-06-03 19:32:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:59,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:01,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:01,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380526309] [2024-06-03 19:33:01,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380526309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:01,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:01,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:01,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815247719] [2024-06-03 19:33:01,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:01,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:01,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:01,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:01,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:01,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:01,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 211 transitions, 2066 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 19:33:01,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:01,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:01,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:01,975 INFO L124 PetriNetUnfolderBase]: 2499/3917 cut-off events. [2024-06-03 19:33:01,975 INFO L125 PetriNetUnfolderBase]: For 212473/212477 co-relation queries the response was YES. [2024-06-03 19:33:01,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27097 conditions, 3917 events. 2499/3917 cut-off events. For 212473/212477 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 21250 event pairs, 728 based on Foata normal form. 2/3917 useless extension candidates. Maximal degree in co-relation 27014. Up to 3797 conditions per place. [2024-06-03 19:33:02,007 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 200 selfloop transitions, 17 changer transitions 0/221 dead transitions. [2024-06-03 19:33:02,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 221 transitions, 2526 flow [2024-06-03 19:33:02,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:02,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:02,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-03 19:33:02,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-03 19:33:02,008 INFO L175 Difference]: Start difference. First operand has 170 places, 211 transitions, 2066 flow. Second operand 8 states and 118 transitions. [2024-06-03 19:33:02,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 221 transitions, 2526 flow [2024-06-03 19:33:02,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 221 transitions, 2386 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-03 19:33:02,268 INFO L231 Difference]: Finished difference. Result has 173 places, 211 transitions, 1966 flow [2024-06-03 19:33:02,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1926, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1966, PETRI_PLACES=173, PETRI_TRANSITIONS=211} [2024-06-03 19:33:02,268 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-03 19:33:02,268 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 211 transitions, 1966 flow [2024-06-03 19:33:02,269 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 19:33:02,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:02,269 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 19:33:02,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 19:33:02,269 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:02,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:02,270 INFO L85 PathProgramCache]: Analyzing trace with hash -319486561, now seen corresponding path program 1 times [2024-06-03 19:33:02,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:02,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597332511] [2024-06-03 19:33:02,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:02,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:03,239 INFO 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 19:33:03,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:03,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597332511] [2024-06-03 19:33:03,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597332511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:03,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:03,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:03,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162707753] [2024-06-03 19:33:03,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:03,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:03,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:03,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:03,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:03,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:03,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 211 transitions, 1966 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 19:33:03,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:03,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:03,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:03,975 INFO L124 PetriNetUnfolderBase]: 2509/3934 cut-off events. [2024-06-03 19:33:03,976 INFO L125 PetriNetUnfolderBase]: For 221175/221187 co-relation queries the response was YES. [2024-06-03 19:33:03,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27203 conditions, 3934 events. 2509/3934 cut-off events. For 221175/221187 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 21416 event pairs, 675 based on Foata normal form. 12/3943 useless extension candidates. Maximal degree in co-relation 27119. Up to 3672 conditions per place. [2024-06-03 19:33:04,010 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 194 selfloop transitions, 40 changer transitions 0/238 dead transitions. [2024-06-03 19:33:04,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 238 transitions, 2579 flow [2024-06-03 19:33:04,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:04,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:04,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 19:33:04,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 19:33:04,012 INFO L175 Difference]: Start difference. First operand has 173 places, 211 transitions, 1966 flow. Second operand 8 states and 136 transitions. [2024-06-03 19:33:04,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 238 transitions, 2579 flow [2024-06-03 19:33:04,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 238 transitions, 2487 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 19:33:04,253 INFO L231 Difference]: Finished difference. Result has 173 places, 215 transitions, 2035 flow [2024-06-03 19:33:04,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2035, PETRI_PLACES=173, PETRI_TRANSITIONS=215} [2024-06-03 19:33:04,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-03 19:33:04,254 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 215 transitions, 2035 flow [2024-06-03 19:33:04,254 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 19:33:04,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:04,255 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 19:33:04,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 19:33:04,255 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:04,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:04,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1439160566, now seen corresponding path program 1 times [2024-06-03 19:33:04,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:04,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279596853] [2024-06-03 19:33:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:04,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:04,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:04,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279596853] [2024-06-03 19:33:04,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279596853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:04,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:04,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:33:04,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160603618] [2024-06-03 19:33:04,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:04,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:33:04,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:04,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:33:04,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:33:04,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:04,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 215 transitions, 2035 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 19:33:04,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:04,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:04,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:05,502 INFO L124 PetriNetUnfolderBase]: 2519/3943 cut-off events. [2024-06-03 19:33:05,502 INFO L125 PetriNetUnfolderBase]: For 230500/230510 co-relation queries the response was YES. [2024-06-03 19:33:05,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27997 conditions, 3943 events. 2519/3943 cut-off events. For 230500/230510 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21453 event pairs, 682 based on Foata normal form. 7/3947 useless extension candidates. Maximal degree in co-relation 27913. Up to 3688 conditions per place. [2024-06-03 19:33:05,540 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 198 selfloop transitions, 36 changer transitions 0/238 dead transitions. [2024-06-03 19:33:05,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 238 transitions, 2620 flow [2024-06-03 19:33:05,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:33:05,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:33:05,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 19:33:05,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-03 19:33:05,541 INFO L175 Difference]: Start difference. First operand has 173 places, 215 transitions, 2035 flow. Second operand 7 states and 120 transitions. [2024-06-03 19:33:05,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 238 transitions, 2620 flow [2024-06-03 19:33:05,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 238 transitions, 2487 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-03 19:33:05,903 INFO L231 Difference]: Finished difference. Result has 174 places, 219 transitions, 2046 flow [2024-06-03 19:33:05,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1902, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2046, PETRI_PLACES=174, PETRI_TRANSITIONS=219} [2024-06-03 19:33:05,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-03 19:33:05,904 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 219 transitions, 2046 flow [2024-06-03 19:33:05,904 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 19:33:05,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:05,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:05,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 19:33:05,904 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 19:33:05,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:05,905 INFO L85 PathProgramCache]: Analyzing trace with hash 587875052, now seen corresponding path program 2 times [2024-06-03 19:33:05,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:05,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955685383] [2024-06-03 19:33:05,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:05,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:06,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:06,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955685383] [2024-06-03 19:33:06,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955685383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:06,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:06,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:33:06,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194071708] [2024-06-03 19:33:06,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:06,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:33:06,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:06,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:33:06,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:33:06,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:06,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 219 transitions, 2046 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 19:33:06,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:06,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:06,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:07,424 INFO L124 PetriNetUnfolderBase]: 2521/3945 cut-off events. [2024-06-03 19:33:07,424 INFO L125 PetriNetUnfolderBase]: For 237763/237773 co-relation queries the response was YES. [2024-06-03 19:33:07,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28092 conditions, 3945 events. 2521/3945 cut-off events. For 237763/237773 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21452 event pairs, 683 based on Foata normal form. 7/3949 useless extension candidates. Maximal degree in co-relation 28007. Up to 3651 conditions per place. [2024-06-03 19:33:07,458 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 45 changer transitions 0/238 dead transitions. [2024-06-03 19:33:07,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 238 transitions, 2718 flow [2024-06-03 19:33:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:33:07,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:33:07,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-03 19:33:07,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 19:33:07,459 INFO L175 Difference]: Start difference. First operand has 174 places, 219 transitions, 2046 flow. Second operand 7 states and 119 transitions. [2024-06-03 19:33:07,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 238 transitions, 2718 flow [2024-06-03 19:33:07,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 238 transitions, 2619 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 19:33:07,752 INFO L231 Difference]: Finished difference. Result has 176 places, 222 transitions, 2102 flow [2024-06-03 19:33:07,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1947, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2102, PETRI_PLACES=176, PETRI_TRANSITIONS=222} [2024-06-03 19:33:07,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-03 19:33:07,752 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 222 transitions, 2102 flow [2024-06-03 19:33:07,753 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 19:33:07,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:07,753 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 19:33:07,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 19:33:07,753 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 19:33:07,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:07,754 INFO L85 PathProgramCache]: Analyzing trace with hash 587871425, now seen corresponding path program 2 times [2024-06-03 19:33:07,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:07,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915969191] [2024-06-03 19:33:07,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:07,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:08,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:08,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915969191] [2024-06-03 19:33:08,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915969191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:08,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:08,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:08,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87317557] [2024-06-03 19:33:08,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:08,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:08,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:08,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:08,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:08,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:08,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 222 transitions, 2102 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 19:33:08,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:08,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:08,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:09,513 INFO L124 PetriNetUnfolderBase]: 2533/3964 cut-off events. [2024-06-03 19:33:09,513 INFO L125 PetriNetUnfolderBase]: For 247343/247353 co-relation queries the response was YES. [2024-06-03 19:33:09,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28385 conditions, 3964 events. 2533/3964 cut-off events. For 247343/247353 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 21559 event pairs, 683 based on Foata normal form. 7/3968 useless extension candidates. Maximal degree in co-relation 28299. Up to 3661 conditions per place. [2024-06-03 19:33:09,553 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 189 selfloop transitions, 50 changer transitions 0/243 dead transitions. [2024-06-03 19:33:09,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 243 transitions, 2808 flow [2024-06-03 19:33:09,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:09,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:09,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 19:33:09,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-03 19:33:09,555 INFO L175 Difference]: Start difference. First operand has 176 places, 222 transitions, 2102 flow. Second operand 8 states and 132 transitions. [2024-06-03 19:33:09,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 243 transitions, 2808 flow [2024-06-03 19:33:09,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 243 transitions, 2708 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-03 19:33:09,878 INFO L231 Difference]: Finished difference. Result has 180 places, 226 transitions, 2191 flow [2024-06-03 19:33:09,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2191, PETRI_PLACES=180, PETRI_TRANSITIONS=226} [2024-06-03 19:33:09,879 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-03 19:33:09,879 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 226 transitions, 2191 flow [2024-06-03 19:33:09,879 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 19:33:09,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:09,879 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 19:33:09,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 19:33:09,879 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 19:33:09,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:09,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1433439113, now seen corresponding path program 3 times [2024-06-03 19:33:09,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:09,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744982925] [2024-06-03 19:33:09,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:09,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:10,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:10,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744982925] [2024-06-03 19:33:10,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744982925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:10,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:10,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:10,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240821823] [2024-06-03 19:33:10,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:10,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:10,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:10,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:10,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:10,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:10,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 226 transitions, 2191 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 19:33:10,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:10,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:10,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:11,697 INFO L124 PetriNetUnfolderBase]: 2561/4008 cut-off events. [2024-06-03 19:33:11,697 INFO L125 PetriNetUnfolderBase]: For 259879/259889 co-relation queries the response was YES. [2024-06-03 19:33:11,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29403 conditions, 4008 events. 2561/4008 cut-off events. For 259879/259889 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 21933 event pairs, 683 based on Foata normal form. 7/4012 useless extension candidates. Maximal degree in co-relation 29316. Up to 3661 conditions per place. [2024-06-03 19:33:11,728 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 191 selfloop transitions, 57 changer transitions 0/252 dead transitions. [2024-06-03 19:33:11,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 252 transitions, 3105 flow [2024-06-03 19:33:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:11,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 19:33:11,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-03 19:33:11,730 INFO L175 Difference]: Start difference. First operand has 180 places, 226 transitions, 2191 flow. Second operand 8 states and 134 transitions. [2024-06-03 19:33:11,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 252 transitions, 3105 flow [2024-06-03 19:33:12,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 252 transitions, 2944 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 19:33:12,038 INFO L231 Difference]: Finished difference. Result has 183 places, 234 transitions, 2335 flow [2024-06-03 19:33:12,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2335, PETRI_PLACES=183, PETRI_TRANSITIONS=234} [2024-06-03 19:33:12,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-03 19:33:12,039 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 234 transitions, 2335 flow [2024-06-03 19:33:12,039 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 19:33:12,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:12,039 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 19:33:12,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 19:33:12,040 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:12,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:12,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1433438710, now seen corresponding path program 1 times [2024-06-03 19:33:12,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:12,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170310449] [2024-06-03 19:33:12,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:12,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:12,987 INFO 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 19:33:12,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:12,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170310449] [2024-06-03 19:33:12,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170310449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:12,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:12,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:12,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615710026] [2024-06-03 19:33:12,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:12,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:12,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:12,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:12,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:13,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:13,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 234 transitions, 2335 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 19:33:13,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:13,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:13,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:13,739 INFO L124 PetriNetUnfolderBase]: 2566/4020 cut-off events. [2024-06-03 19:33:13,739 INFO L125 PetriNetUnfolderBase]: For 268168/268174 co-relation queries the response was YES. [2024-06-03 19:33:13,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30153 conditions, 4020 events. 2566/4020 cut-off events. For 268168/268174 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21893 event pairs, 697 based on Foata normal form. 7/4025 useless extension candidates. Maximal degree in co-relation 30064. Up to 3872 conditions per place. [2024-06-03 19:33:13,777 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 231 selfloop transitions, 19 changer transitions 0/254 dead transitions. [2024-06-03 19:33:13,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 254 transitions, 2958 flow [2024-06-03 19:33:13,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:13,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-03 19:33:13,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-03 19:33:13,779 INFO L175 Difference]: Start difference. First operand has 183 places, 234 transitions, 2335 flow. Second operand 8 states and 124 transitions. [2024-06-03 19:33:13,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 254 transitions, 2958 flow [2024-06-03 19:33:14,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 254 transitions, 2811 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-03 19:33:14,140 INFO L231 Difference]: Finished difference. Result has 187 places, 237 transitions, 2304 flow [2024-06-03 19:33:14,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2188, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2304, PETRI_PLACES=187, PETRI_TRANSITIONS=237} [2024-06-03 19:33:14,141 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-03 19:33:14,141 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 237 transitions, 2304 flow [2024-06-03 19:33:14,141 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 19:33:14,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:14,142 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 19:33:14,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 19:33:14,142 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:14,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:14,142 INFO L85 PathProgramCache]: Analyzing trace with hash -243050742, now seen corresponding path program 3 times [2024-06-03 19:33:14,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:14,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008266763] [2024-06-03 19:33:14,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:14,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:14,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:14,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008266763] [2024-06-03 19:33:14,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008266763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:14,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:14,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:33:14,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705502565] [2024-06-03 19:33:14,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:14,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:33:14,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:14,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:33:14,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:33:14,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:14,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 237 transitions, 2304 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 19:33:14,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:14,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:14,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:15,555 INFO L124 PetriNetUnfolderBase]: 2559/4002 cut-off events. [2024-06-03 19:33:15,556 INFO L125 PetriNetUnfolderBase]: For 274453/274461 co-relation queries the response was YES. [2024-06-03 19:33:15,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30323 conditions, 4002 events. 2559/4002 cut-off events. For 274453/274461 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21787 event pairs, 686 based on Foata normal form. 3/3995 useless extension candidates. Maximal degree in co-relation 30232. Up to 3753 conditions per place. [2024-06-03 19:33:15,593 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 214 selfloop transitions, 36 changer transitions 0/254 dead transitions. [2024-06-03 19:33:15,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 254 transitions, 2862 flow [2024-06-03 19:33:15,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:33:15,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:33:15,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-03 19:33:15,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-03 19:33:15,594 INFO L175 Difference]: Start difference. First operand has 187 places, 237 transitions, 2304 flow. Second operand 7 states and 117 transitions. [2024-06-03 19:33:15,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 254 transitions, 2862 flow [2024-06-03 19:33:15,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 254 transitions, 2744 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-03 19:33:15,902 INFO L231 Difference]: Finished difference. Result has 188 places, 237 transitions, 2265 flow [2024-06-03 19:33:15,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2265, PETRI_PLACES=188, PETRI_TRANSITIONS=237} [2024-06-03 19:33:15,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-03 19:33:15,903 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 237 transitions, 2265 flow [2024-06-03 19:33:15,903 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 19:33:15,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:15,903 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 19:33:15,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 19:33:15,904 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:15,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:15,904 INFO L85 PathProgramCache]: Analyzing trace with hash 809953006, now seen corresponding path program 4 times [2024-06-03 19:33:15,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:15,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218129790] [2024-06-03 19:33:15,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:15,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:16,622 INFO 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 19:33:16,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:16,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218129790] [2024-06-03 19:33:16,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218129790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:16,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:16,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:33:16,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641370984] [2024-06-03 19:33:16,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:16,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:33:16,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:16,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:33:16,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:33:16,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:16,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 237 transitions, 2265 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 19:33:16,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:16,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:16,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:17,331 INFO L124 PetriNetUnfolderBase]: 2564/4007 cut-off events. [2024-06-03 19:33:17,332 INFO L125 PetriNetUnfolderBase]: For 283670/283678 co-relation queries the response was YES. [2024-06-03 19:33:17,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30592 conditions, 4007 events. 2564/4007 cut-off events. For 283670/283678 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21806 event pairs, 682 based on Foata normal form. 3/4000 useless extension candidates. Maximal degree in co-relation 30500. Up to 3740 conditions per place. [2024-06-03 19:33:17,373 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 205 selfloop transitions, 45 changer transitions 0/254 dead transitions. [2024-06-03 19:33:17,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 254 transitions, 2863 flow [2024-06-03 19:33:17,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:33:17,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:33:17,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-03 19:33:17,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-03 19:33:17,396 INFO L175 Difference]: Start difference. First operand has 188 places, 237 transitions, 2265 flow. Second operand 7 states and 116 transitions. [2024-06-03 19:33:17,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 254 transitions, 2863 flow [2024-06-03 19:33:17,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 254 transitions, 2729 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 19:33:17,813 INFO L231 Difference]: Finished difference. Result has 188 places, 240 transitions, 2285 flow [2024-06-03 19:33:17,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2131, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2285, PETRI_PLACES=188, PETRI_TRANSITIONS=240} [2024-06-03 19:33:17,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-03 19:33:17,813 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 240 transitions, 2285 flow [2024-06-03 19:33:17,813 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 19:33:17,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:17,814 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 19:33:17,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 19:33:17,814 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:17,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:17,817 INFO L85 PathProgramCache]: Analyzing trace with hash -807142384, now seen corresponding path program 5 times [2024-06-03 19:33:17,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:17,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592289835] [2024-06-03 19:33:17,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:17,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:18,556 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 19:33:18,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:18,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592289835] [2024-06-03 19:33:18,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592289835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:18,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:18,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:33:18,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103367249] [2024-06-03 19:33:18,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:18,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:33:18,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:18,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:33:18,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:33:18,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:18,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 240 transitions, 2285 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 19:33:18,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:18,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:18,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:19,285 INFO L124 PetriNetUnfolderBase]: 2566/4017 cut-off events. [2024-06-03 19:33:19,286 INFO L125 PetriNetUnfolderBase]: For 293457/293471 co-relation queries the response was YES. [2024-06-03 19:33:19,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30722 conditions, 4017 events. 2566/4017 cut-off events. For 293457/293471 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 21890 event pairs, 705 based on Foata normal form. 8/4013 useless extension candidates. Maximal degree in co-relation 30629. Up to 3680 conditions per place. [2024-06-03 19:33:19,322 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 61 changer transitions 0/254 dead transitions. [2024-06-03 19:33:19,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 254 transitions, 2989 flow [2024-06-03 19:33:19,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:33:19,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:33:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-03 19:33:19,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-03 19:33:19,324 INFO L175 Difference]: Start difference. First operand has 188 places, 240 transitions, 2285 flow. Second operand 7 states and 116 transitions. [2024-06-03 19:33:19,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 254 transitions, 2989 flow [2024-06-03 19:33:19,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 254 transitions, 2867 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 19:33:19,711 INFO L231 Difference]: Finished difference. Result has 190 places, 243 transitions, 2353 flow [2024-06-03 19:33:19,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2163, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2353, PETRI_PLACES=190, PETRI_TRANSITIONS=243} [2024-06-03 19:33:19,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-03 19:33:19,712 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 243 transitions, 2353 flow [2024-06-03 19:33:19,712 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 19:33:19,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:19,713 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 19:33:19,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 19:33:19,713 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:19,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:19,713 INFO L85 PathProgramCache]: Analyzing trace with hash 964486922, now seen corresponding path program 6 times [2024-06-03 19:33:19,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:19,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468385466] [2024-06-03 19:33:19,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:19,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:20,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:20,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468385466] [2024-06-03 19:33:20,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468385466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:20,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:20,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:33:20,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160915120] [2024-06-03 19:33:20,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:20,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:33:20,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:20,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:33:20,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:33:20,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:20,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 243 transitions, 2353 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 19:33:20,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:20,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:20,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:21,125 INFO L124 PetriNetUnfolderBase]: 2561/4007 cut-off events. [2024-06-03 19:33:21,125 INFO L125 PetriNetUnfolderBase]: For 299651/299665 co-relation queries the response was YES. [2024-06-03 19:33:21,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30786 conditions, 4007 events. 2561/4007 cut-off events. For 299651/299665 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 21789 event pairs, 705 based on Foata normal form. 7/4002 useless extension candidates. Maximal degree in co-relation 30692. Up to 3675 conditions per place. [2024-06-03 19:33:21,175 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 184 selfloop transitions, 65 changer transitions 0/253 dead transitions. [2024-06-03 19:33:21,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 253 transitions, 2881 flow [2024-06-03 19:33:21,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:33:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:33:21,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-03 19:33:21,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-03 19:33:21,177 INFO L175 Difference]: Start difference. First operand has 190 places, 243 transitions, 2353 flow. Second operand 7 states and 114 transitions. [2024-06-03 19:33:21,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 253 transitions, 2881 flow [2024-06-03 19:33:21,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 253 transitions, 2705 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-03 19:33:21,589 INFO L231 Difference]: Finished difference. Result has 193 places, 243 transitions, 2313 flow [2024-06-03 19:33:21,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2177, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2313, PETRI_PLACES=193, PETRI_TRANSITIONS=243} [2024-06-03 19:33:21,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-03 19:33:21,591 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 243 transitions, 2313 flow [2024-06-03 19:33:21,591 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 19:33:21,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:21,591 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 19:33:21,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 19:33:21,591 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:21,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:21,592 INFO L85 PathProgramCache]: Analyzing trace with hash 958769375, now seen corresponding path program 4 times [2024-06-03 19:33:21,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:21,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325325603] [2024-06-03 19:33:21,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:21,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:22,896 INFO 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 19:33:22,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:22,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325325603] [2024-06-03 19:33:22,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325325603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:22,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:22,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:22,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81126274] [2024-06-03 19:33:22,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:22,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:22,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:22,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:22,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:22,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:22,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 243 transitions, 2313 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 19:33:22,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:22,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:22,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:23,746 INFO L124 PetriNetUnfolderBase]: 2571/4023 cut-off events. [2024-06-03 19:33:23,746 INFO L125 PetriNetUnfolderBase]: For 311121/311135 co-relation queries the response was YES. [2024-06-03 19:33:23,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31021 conditions, 4023 events. 2571/4023 cut-off events. For 311121/311135 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 21904 event pairs, 705 based on Foata normal form. 8/4019 useless extension candidates. Maximal degree in co-relation 30926. Up to 3683 conditions per place. [2024-06-03 19:33:23,782 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 187 selfloop transitions, 67 changer transitions 0/258 dead transitions. [2024-06-03 19:33:23,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 258 transitions, 2945 flow [2024-06-03 19:33:23,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:23,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:23,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 19:33:23,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:33:23,783 INFO L175 Difference]: Start difference. First operand has 193 places, 243 transitions, 2313 flow. Second operand 8 states and 128 transitions. [2024-06-03 19:33:23,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 258 transitions, 2945 flow [2024-06-03 19:33:24,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 258 transitions, 2775 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-03 19:33:24,192 INFO L231 Difference]: Finished difference. Result has 194 places, 247 transitions, 2384 flow [2024-06-03 19:33:24,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2143, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2384, PETRI_PLACES=194, PETRI_TRANSITIONS=247} [2024-06-03 19:33:24,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-03 19:33:24,193 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 247 transitions, 2384 flow [2024-06-03 19:33:24,193 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 19:33:24,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:24,194 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 19:33:24,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 19:33:24,194 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:24,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:24,194 INFO L85 PathProgramCache]: Analyzing trace with hash 971680968, now seen corresponding path program 2 times [2024-06-03 19:33:24,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:24,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638237198] [2024-06-03 19:33:24,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:24,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:25,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:25,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638237198] [2024-06-03 19:33:25,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638237198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:25,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:25,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:25,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664654238] [2024-06-03 19:33:25,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:25,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:25,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:25,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:25,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:25,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:25,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 247 transitions, 2384 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 19:33:25,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:25,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:25,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:26,406 INFO L124 PetriNetUnfolderBase]: 2576/4032 cut-off events. [2024-06-03 19:33:26,406 INFO L125 PetriNetUnfolderBase]: For 320544/320548 co-relation queries the response was YES. [2024-06-03 19:33:26,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31666 conditions, 4032 events. 2576/4032 cut-off events. For 320544/320548 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 21961 event pairs, 725 based on Foata normal form. 2/4032 useless extension candidates. Maximal degree in co-relation 31570. Up to 3905 conditions per place. [2024-06-03 19:33:26,447 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 239 selfloop transitions, 17 changer transitions 0/260 dead transitions. [2024-06-03 19:33:26,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 260 transitions, 2996 flow [2024-06-03 19:33:26,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:26,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:26,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-03 19:33:26,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-03 19:33:26,449 INFO L175 Difference]: Start difference. First operand has 194 places, 247 transitions, 2384 flow. Second operand 8 states and 118 transitions. [2024-06-03 19:33:26,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 260 transitions, 2996 flow [2024-06-03 19:33:26,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 260 transitions, 2783 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-03 19:33:26,827 INFO L231 Difference]: Finished difference. Result has 196 places, 250 transitions, 2291 flow [2024-06-03 19:33:26,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2171, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2291, PETRI_PLACES=196, PETRI_TRANSITIONS=250} [2024-06-03 19:33:26,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-03 19:33:26,828 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 250 transitions, 2291 flow [2024-06-03 19:33:26,828 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 19:33:26,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:26,829 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 19:33:26,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 19:33:26,829 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:26,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:26,829 INFO L85 PathProgramCache]: Analyzing trace with hash 958780535, now seen corresponding path program 5 times [2024-06-03 19:33:26,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:26,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147165121] [2024-06-03 19:33:26,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:26,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:27,891 INFO 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 19:33:27,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:27,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147165121] [2024-06-03 19:33:27,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147165121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:27,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:27,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:27,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427409750] [2024-06-03 19:33:27,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:27,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:27,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:27,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:27,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:27,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:27,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 250 transitions, 2291 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 19:33:27,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:27,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:27,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:28,638 INFO L124 PetriNetUnfolderBase]: 2604/4074 cut-off events. [2024-06-03 19:33:28,646 INFO L125 PetriNetUnfolderBase]: For 335093/335107 co-relation queries the response was YES. [2024-06-03 19:33:28,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32334 conditions, 4074 events. 2604/4074 cut-off events. For 335093/335107 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22240 event pairs, 705 based on Foata normal form. 8/4070 useless extension candidates. Maximal degree in co-relation 32237. Up to 3701 conditions per place. [2024-06-03 19:33:28,689 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 195 selfloop transitions, 71 changer transitions 0/270 dead transitions. [2024-06-03 19:33:28,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 270 transitions, 3171 flow [2024-06-03 19:33:28,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:28,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-03 19:33:28,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-03 19:33:28,691 INFO L175 Difference]: Start difference. First operand has 196 places, 250 transitions, 2291 flow. Second operand 8 states and 130 transitions. [2024-06-03 19:33:28,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 270 transitions, 3171 flow [2024-06-03 19:33:29,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 270 transitions, 3073 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-03 19:33:29,097 INFO L231 Difference]: Finished difference. Result has 199 places, 258 transitions, 2560 flow [2024-06-03 19:33:29,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2193, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2560, PETRI_PLACES=199, PETRI_TRANSITIONS=258} [2024-06-03 19:33:29,098 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-03 19:33:29,098 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 258 transitions, 2560 flow [2024-06-03 19:33:29,098 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 19:33:29,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:29,098 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 19:33:29,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 19:33:29,098 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 19:33:29,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:29,099 INFO L85 PathProgramCache]: Analyzing trace with hash 971667948, now seen corresponding path program 3 times [2024-06-03 19:33:29,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:29,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933898689] [2024-06-03 19:33:29,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:29,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:30,151 INFO 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 19:33:30,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:30,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933898689] [2024-06-03 19:33:30,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933898689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:30,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:30,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:30,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142405721] [2024-06-03 19:33:30,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:30,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:30,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:30,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:30,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:30,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:30,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 258 transitions, 2560 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 19:33:30,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:30,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:30,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:30,886 INFO L124 PetriNetUnfolderBase]: 2622/4109 cut-off events. [2024-06-03 19:33:30,886 INFO L125 PetriNetUnfolderBase]: For 357685/357699 co-relation queries the response was YES. [2024-06-03 19:33:30,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33594 conditions, 4109 events. 2622/4109 cut-off events. For 357685/357699 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22540 event pairs, 690 based on Foata normal form. 14/4119 useless extension candidates. Maximal degree in co-relation 33495. Up to 3903 conditions per place. [2024-06-03 19:33:30,932 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 44 changer transitions 0/283 dead transitions. [2024-06-03 19:33:30,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 283 transitions, 3673 flow [2024-06-03 19:33:30,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:30,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 19:33:30,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:33:30,934 INFO L175 Difference]: Start difference. First operand has 199 places, 258 transitions, 2560 flow. Second operand 8 states and 128 transitions. [2024-06-03 19:33:30,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 283 transitions, 3673 flow [2024-06-03 19:33:31,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 283 transitions, 3478 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-03 19:33:31,297 INFO L231 Difference]: Finished difference. Result has 203 places, 267 transitions, 2711 flow [2024-06-03 19:33:31,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2365, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2711, PETRI_PLACES=203, PETRI_TRANSITIONS=267} [2024-06-03 19:33:31,298 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-03 19:33:31,298 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 267 transitions, 2711 flow [2024-06-03 19:33:31,298 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 19:33:31,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:31,298 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 19:33:31,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 19:33:31,298 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 19:33:31,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:31,299 INFO L85 PathProgramCache]: Analyzing trace with hash 971667545, now seen corresponding path program 6 times [2024-06-03 19:33:31,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:31,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215513854] [2024-06-03 19:33:31,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:31,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:32,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:32,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215513854] [2024-06-03 19:33:32,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215513854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:32,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:32,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:32,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428546044] [2024-06-03 19:33:32,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:32,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:32,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:32,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:32,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:32,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:32,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 267 transitions, 2711 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 19:33:32,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:32,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:32,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:33,175 INFO L124 PetriNetUnfolderBase]: 2626/4106 cut-off events. [2024-06-03 19:33:33,175 INFO L125 PetriNetUnfolderBase]: For 367127/367141 co-relation queries the response was YES. [2024-06-03 19:33:33,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33880 conditions, 4106 events. 2626/4106 cut-off events. For 367127/367141 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 22450 event pairs, 702 based on Foata normal form. 8/4102 useless extension candidates. Maximal degree in co-relation 33779. Up to 3652 conditions per place. [2024-06-03 19:33:33,218 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 194 selfloop transitions, 97 changer transitions 0/295 dead transitions. [2024-06-03 19:33:33,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 295 transitions, 3849 flow [2024-06-03 19:33:33,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:33,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:33,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 19:33:33,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-03 19:33:33,220 INFO L175 Difference]: Start difference. First operand has 203 places, 267 transitions, 2711 flow. Second operand 8 states and 132 transitions. [2024-06-03 19:33:33,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 295 transitions, 3849 flow [2024-06-03 19:33:33,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 295 transitions, 3742 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-03 19:33:33,715 INFO L231 Difference]: Finished difference. Result has 210 places, 282 transitions, 3153 flow [2024-06-03 19:33:33,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2604, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3153, PETRI_PLACES=210, PETRI_TRANSITIONS=282} [2024-06-03 19:33:33,716 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-03 19:33:33,716 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 282 transitions, 3153 flow [2024-06-03 19:33:33,716 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 19:33:33,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:33,716 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 19:33:33,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 19:33:33,717 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 19:33:33,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:33,717 INFO L85 PathProgramCache]: Analyzing trace with hash -807134448, now seen corresponding path program 4 times [2024-06-03 19:33:33,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:33,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465633403] [2024-06-03 19:33:33,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:33,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:34,734 INFO 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 19:33:34,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:34,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465633403] [2024-06-03 19:33:34,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465633403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:34,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:34,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:34,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492987244] [2024-06-03 19:33:34,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:34,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:34,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:34,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:34,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:34,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:34,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 282 transitions, 3153 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 19:33:34,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:34,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:34,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:35,566 INFO L124 PetriNetUnfolderBase]: 2628/4119 cut-off events. [2024-06-03 19:33:35,566 INFO L125 PetriNetUnfolderBase]: For 380498/380512 co-relation queries the response was YES. [2024-06-03 19:33:35,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34851 conditions, 4119 events. 2628/4119 cut-off events. For 380498/380512 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22608 event pairs, 690 based on Foata normal form. 14/4129 useless extension candidates. Maximal degree in co-relation 34746. Up to 3950 conditions per place. [2024-06-03 19:33:35,606 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 270 selfloop transitions, 24 changer transitions 0/298 dead transitions. [2024-06-03 19:33:35,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 298 transitions, 3872 flow [2024-06-03 19:33:35,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:35,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:35,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-03 19:33:35,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-03 19:33:35,607 INFO L175 Difference]: Start difference. First operand has 210 places, 282 transitions, 3153 flow. Second operand 8 states and 121 transitions. [2024-06-03 19:33:35,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 298 transitions, 3872 flow [2024-06-03 19:33:36,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 298 transitions, 3653 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-06-03 19:33:36,121 INFO L231 Difference]: Finished difference. Result has 215 places, 285 transitions, 3076 flow [2024-06-03 19:33:36,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2934, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3076, PETRI_PLACES=215, PETRI_TRANSITIONS=285} [2024-06-03 19:33:36,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-03 19:33:36,122 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 285 transitions, 3076 flow [2024-06-03 19:33:36,122 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 19:33:36,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:36,123 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 19:33:36,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 19:33:36,123 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:36,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:36,123 INFO L85 PathProgramCache]: Analyzing trace with hash -235424246, now seen corresponding path program 1 times [2024-06-03 19:33:36,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:36,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262037882] [2024-06-03 19:33:36,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:36,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:37,133 INFO 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 19:33:37,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:37,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262037882] [2024-06-03 19:33:37,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262037882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:37,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:37,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:37,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105356073] [2024-06-03 19:33:37,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:37,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:37,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:37,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:37,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:37,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:33:37,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 285 transitions, 3076 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:37,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:37,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:33:37,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:38,060 INFO L124 PetriNetUnfolderBase]: 2542/4024 cut-off events. [2024-06-03 19:33:38,060 INFO L125 PetriNetUnfolderBase]: For 382717/382721 co-relation queries the response was YES. [2024-06-03 19:33:38,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33670 conditions, 4024 events. 2542/4024 cut-off events. For 382717/382721 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 22314 event pairs, 689 based on Foata normal form. 2/4024 useless extension candidates. Maximal degree in co-relation 33563. Up to 3736 conditions per place. [2024-06-03 19:33:38,102 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 263 selfloop transitions, 19 changer transitions 0/301 dead transitions. [2024-06-03 19:33:38,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 301 transitions, 3688 flow [2024-06-03 19:33:38,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:33:38,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:33:38,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 19:33:38,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-03 19:33:38,103 INFO L175 Difference]: Start difference. First operand has 215 places, 285 transitions, 3076 flow. Second operand 7 states and 120 transitions. [2024-06-03 19:33:38,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 301 transitions, 3688 flow [2024-06-03 19:33:38,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 301 transitions, 3558 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-03 19:33:38,665 INFO L231 Difference]: Finished difference. Result has 216 places, 285 transitions, 2994 flow [2024-06-03 19:33:38,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2946, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2994, PETRI_PLACES=216, PETRI_TRANSITIONS=285} [2024-06-03 19:33:38,666 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-03 19:33:38,666 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 285 transitions, 2994 flow [2024-06-03 19:33:38,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:38,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:38,666 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 19:33:38,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 19:33:38,667 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 19:33:38,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:38,667 INFO L85 PathProgramCache]: Analyzing trace with hash 806242027, now seen corresponding path program 1 times [2024-06-03 19:33:38,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:38,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799304983] [2024-06-03 19:33:38,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:38,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:39,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:39,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799304983] [2024-06-03 19:33:39,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799304983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:39,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:39,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:39,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779175355] [2024-06-03 19:33:39,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:39,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:39,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:39,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:39,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:39,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:33:39,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 285 transitions, 2994 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:39,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:39,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:33:39,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:40,530 INFO L124 PetriNetUnfolderBase]: 2557/4047 cut-off events. [2024-06-03 19:33:40,530 INFO L125 PetriNetUnfolderBase]: For 399072/399076 co-relation queries the response was YES. [2024-06-03 19:33:40,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33872 conditions, 4047 events. 2557/4047 cut-off events. For 399072/399076 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 22449 event pairs, 687 based on Foata normal form. 5/4050 useless extension candidates. Maximal degree in co-relation 33764. Up to 3750 conditions per place. [2024-06-03 19:33:40,576 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 267 selfloop transitions, 20 changer transitions 0/306 dead transitions. [2024-06-03 19:33:40,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 306 transitions, 3668 flow [2024-06-03 19:33:40,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:40,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 19:33:40,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-03 19:33:40,578 INFO L175 Difference]: Start difference. First operand has 216 places, 285 transitions, 2994 flow. Second operand 8 states and 134 transitions. [2024-06-03 19:33:40,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 306 transitions, 3668 flow [2024-06-03 19:33:41,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 306 transitions, 3620 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:33:41,221 INFO L231 Difference]: Finished difference. Result has 218 places, 288 transitions, 3044 flow [2024-06-03 19:33:41,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2946, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3044, PETRI_PLACES=218, PETRI_TRANSITIONS=288} [2024-06-03 19:33:41,222 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-03 19:33:41,222 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 288 transitions, 3044 flow [2024-06-03 19:33:41,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:41,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:41,222 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 19:33:41,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 19:33:41,222 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 19:33:41,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:41,223 INFO L85 PathProgramCache]: Analyzing trace with hash -231609231, now seen corresponding path program 2 times [2024-06-03 19:33:41,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:41,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664230304] [2024-06-03 19:33:41,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:41,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:42,232 INFO 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 19:33:42,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:42,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664230304] [2024-06-03 19:33:42,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664230304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:42,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:42,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:42,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091641981] [2024-06-03 19:33:42,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:42,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:42,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:42,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:42,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:42,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:33:42,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 288 transitions, 3044 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:42,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:42,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:33:42,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:43,093 INFO L124 PetriNetUnfolderBase]: 2596/4104 cut-off events. [2024-06-03 19:33:43,095 INFO L125 PetriNetUnfolderBase]: For 420159/420163 co-relation queries the response was YES. [2024-06-03 19:33:43,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34935 conditions, 4104 events. 2596/4104 cut-off events. For 420159/420163 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 22812 event pairs, 690 based on Foata normal form. 7/4109 useless extension candidates. Maximal degree in co-relation 34826. Up to 3799 conditions per place. [2024-06-03 19:33:43,144 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 270 selfloop transitions, 23 changer transitions 0/312 dead transitions. [2024-06-03 19:33:43,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 312 transitions, 3930 flow [2024-06-03 19:33:43,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:43,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 19:33:43,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-03 19:33:43,145 INFO L175 Difference]: Start difference. First operand has 218 places, 288 transitions, 3044 flow. Second operand 8 states and 134 transitions. [2024-06-03 19:33:43,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 312 transitions, 3930 flow [2024-06-03 19:33:43,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 312 transitions, 3854 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 19:33:43,959 INFO L231 Difference]: Finished difference. Result has 220 places, 295 transitions, 3140 flow [2024-06-03 19:33:43,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2968, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3140, PETRI_PLACES=220, PETRI_TRANSITIONS=295} [2024-06-03 19:33:43,960 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-03 19:33:43,960 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 295 transitions, 3140 flow [2024-06-03 19:33:43,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:43,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:43,961 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 19:33:43,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 19:33:43,961 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 19:33:43,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:43,961 INFO L85 PathProgramCache]: Analyzing trace with hash -231614811, now seen corresponding path program 3 times [2024-06-03 19:33:43,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:43,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883443106] [2024-06-03 19:33:43,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:43,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:45,033 INFO 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 19:33:45,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:45,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883443106] [2024-06-03 19:33:45,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883443106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:45,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:45,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:45,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20109071] [2024-06-03 19:33:45,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:45,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:45,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:45,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:45,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:45,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:33:45,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 295 transitions, 3140 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:45,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:45,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:33:45,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:45,903 INFO L124 PetriNetUnfolderBase]: 2641/4168 cut-off events. [2024-06-03 19:33:45,903 INFO L125 PetriNetUnfolderBase]: For 438064/438068 co-relation queries the response was YES. [2024-06-03 19:33:45,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36281 conditions, 4168 events. 2641/4168 cut-off events. For 438064/438068 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23200 event pairs, 676 based on Foata normal form. 5/4169 useless extension candidates. Maximal degree in co-relation 36171. Up to 3787 conditions per place. [2024-06-03 19:33:45,949 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 259 selfloop transitions, 41 changer transitions 0/319 dead transitions. [2024-06-03 19:33:45,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 319 transitions, 4052 flow [2024-06-03 19:33:45,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:45,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:45,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 19:33:45,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 19:33:45,950 INFO L175 Difference]: Start difference. First operand has 220 places, 295 transitions, 3140 flow. Second operand 8 states and 139 transitions. [2024-06-03 19:33:45,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 319 transitions, 4052 flow [2024-06-03 19:33:46,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 319 transitions, 3978 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-03 19:33:46,643 INFO L231 Difference]: Finished difference. Result has 225 places, 301 transitions, 3300 flow [2024-06-03 19:33:46,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3066, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3300, PETRI_PLACES=225, PETRI_TRANSITIONS=301} [2024-06-03 19:33:46,643 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-03 19:33:46,644 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 301 transitions, 3300 flow [2024-06-03 19:33:46,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:46,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:46,644 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 19:33:46,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 19:33:46,644 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:46,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:46,645 INFO L85 PathProgramCache]: Analyzing trace with hash 964500593, now seen corresponding path program 4 times [2024-06-03 19:33:46,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:46,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028297437] [2024-06-03 19:33:46,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:46,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:47,630 INFO 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 19:33:47,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:47,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028297437] [2024-06-03 19:33:47,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028297437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:47,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:47,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:47,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346780854] [2024-06-03 19:33:47,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:47,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:47,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:47,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:47,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:47,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:33:47,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 301 transitions, 3300 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:47,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:47,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:33:47,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:48,598 INFO L124 PetriNetUnfolderBase]: 2677/4225 cut-off events. [2024-06-03 19:33:48,598 INFO L125 PetriNetUnfolderBase]: For 460122/460132 co-relation queries the response was YES. [2024-06-03 19:33:48,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37480 conditions, 4225 events. 2677/4225 cut-off events. For 460122/460132 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 23555 event pairs, 688 based on Foata normal form. 11/4233 useless extension candidates. Maximal degree in co-relation 37367. Up to 3903 conditions per place. [2024-06-03 19:33:48,731 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 275 selfloop transitions, 28 changer transitions 0/322 dead transitions. [2024-06-03 19:33:48,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 322 transitions, 4232 flow [2024-06-03 19:33:48,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:48,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 19:33:48,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-03 19:33:48,733 INFO L175 Difference]: Start difference. First operand has 225 places, 301 transitions, 3300 flow. Second operand 8 states and 133 transitions. [2024-06-03 19:33:48,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 322 transitions, 4232 flow [2024-06-03 19:33:49,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 322 transitions, 4152 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-03 19:33:49,378 INFO L231 Difference]: Finished difference. Result has 229 places, 308 transitions, 3430 flow [2024-06-03 19:33:49,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3220, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3430, PETRI_PLACES=229, PETRI_TRANSITIONS=308} [2024-06-03 19:33:49,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-03 19:33:49,380 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 308 transitions, 3430 flow [2024-06-03 19:33:49,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:49,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:49,380 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 19:33:49,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 19:33:49,380 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:49,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:49,381 INFO L85 PathProgramCache]: Analyzing trace with hash 964495013, now seen corresponding path program 5 times [2024-06-03 19:33:49,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:49,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787490753] [2024-06-03 19:33:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:49,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:50,421 INFO 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 19:33:50,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:50,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787490753] [2024-06-03 19:33:50,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787490753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:50,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:50,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:50,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045601704] [2024-06-03 19:33:50,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:50,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:50,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:50,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:50,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:50,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:33:50,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 308 transitions, 3430 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:50,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:50,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:33:50,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:51,486 INFO L124 PetriNetUnfolderBase]: 2695/4248 cut-off events. [2024-06-03 19:33:51,487 INFO L125 PetriNetUnfolderBase]: For 469584/469591 co-relation queries the response was YES. [2024-06-03 19:33:51,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38286 conditions, 4248 events. 2695/4248 cut-off events. For 469584/469591 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 23683 event pairs, 687 based on Foata normal form. 5/4245 useless extension candidates. Maximal degree in co-relation 38171. Up to 3915 conditions per place. [2024-06-03 19:33:51,539 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 271 selfloop transitions, 34 changer transitions 0/324 dead transitions. [2024-06-03 19:33:51,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 324 transitions, 4148 flow [2024-06-03 19:33:51,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:51,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:51,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 19:33:51,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-03 19:33:51,542 INFO L175 Difference]: Start difference. First operand has 229 places, 308 transitions, 3430 flow. Second operand 8 states and 133 transitions. [2024-06-03 19:33:51,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 324 transitions, 4148 flow [2024-06-03 19:33:52,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 324 transitions, 4040 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-03 19:33:52,242 INFO L231 Difference]: Finished difference. Result has 233 places, 311 transitions, 3472 flow [2024-06-03 19:33:52,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3472, PETRI_PLACES=233, PETRI_TRANSITIONS=311} [2024-06-03 19:33:52,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-03 19:33:52,243 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 311 transitions, 3472 flow [2024-06-03 19:33:52,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:52,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:52,244 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 19:33:52,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 19:33:52,244 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:52,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:52,244 INFO L85 PathProgramCache]: Analyzing trace with hash -794063143, now seen corresponding path program 6 times [2024-06-03 19:33:52,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:52,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139993431] [2024-06-03 19:33:52,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:52,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:53,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:53,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139993431] [2024-06-03 19:33:53,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139993431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:53,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:53,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:53,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230133081] [2024-06-03 19:33:53,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:53,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:53,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:53,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:53,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:53,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:33:53,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 311 transitions, 3472 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:53,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:53,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:33:53,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:54,348 INFO L124 PetriNetUnfolderBase]: 2709/4270 cut-off events. [2024-06-03 19:33:54,349 INFO L125 PetriNetUnfolderBase]: For 481467/481477 co-relation queries the response was YES. [2024-06-03 19:33:54,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38656 conditions, 4270 events. 2709/4270 cut-off events. For 481467/481477 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23793 event pairs, 706 based on Foata normal form. 11/4278 useless extension candidates. Maximal degree in co-relation 38539. Up to 3868 conditions per place. [2024-06-03 19:33:54,397 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 264 selfloop transitions, 52 changer transitions 0/335 dead transitions. [2024-06-03 19:33:54,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 335 transitions, 4628 flow [2024-06-03 19:33:54,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:54,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:33:54,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-03 19:33:54,399 INFO L175 Difference]: Start difference. First operand has 233 places, 311 transitions, 3472 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:33:54,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 335 transitions, 4628 flow [2024-06-03 19:33:54,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 335 transitions, 4500 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 19:33:54,990 INFO L231 Difference]: Finished difference. Result has 235 places, 318 transitions, 3626 flow [2024-06-03 19:33:54,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3344, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3626, PETRI_PLACES=235, PETRI_TRANSITIONS=318} [2024-06-03 19:33:54,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-03 19:33:54,991 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 318 transitions, 3626 flow [2024-06-03 19:33:54,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:54,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:54,992 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 19:33:54,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 19:33:54,992 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 19:33:54,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:54,992 INFO L85 PathProgramCache]: Analyzing trace with hash 972129290, now seen corresponding path program 1 times [2024-06-03 19:33:54,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:54,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678764761] [2024-06-03 19:33:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:54,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:56,279 INFO 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 19:33:56,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:56,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678764761] [2024-06-03 19:33:56,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678764761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:56,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:56,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:56,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146710211] [2024-06-03 19:33:56,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:56,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:56,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:56,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:56,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:56,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:56,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 318 transitions, 3626 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:56,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:56,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:56,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:57,217 INFO L124 PetriNetUnfolderBase]: 2818/4377 cut-off events. [2024-06-03 19:33:57,217 INFO L125 PetriNetUnfolderBase]: For 479630/479634 co-relation queries the response was YES. [2024-06-03 19:33:57,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39652 conditions, 4377 events. 2818/4377 cut-off events. For 479630/479634 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 23851 event pairs, 723 based on Foata normal form. 3/4378 useless extension candidates. Maximal degree in co-relation 39534. Up to 4237 conditions per place. [2024-06-03 19:33:57,270 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 309 selfloop transitions, 18 changer transitions 0/331 dead transitions. [2024-06-03 19:33:57,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 331 transitions, 4394 flow [2024-06-03 19:33:57,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:57,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:57,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-03 19:33:57,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-03 19:33:57,272 INFO L175 Difference]: Start difference. First operand has 235 places, 318 transitions, 3626 flow. Second operand 8 states and 119 transitions. [2024-06-03 19:33:57,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 331 transitions, 4394 flow [2024-06-03 19:33:57,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 331 transitions, 4212 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-03 19:33:57,885 INFO L231 Difference]: Finished difference. Result has 238 places, 320 transitions, 3575 flow [2024-06-03 19:33:57,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3446, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3575, PETRI_PLACES=238, PETRI_TRANSITIONS=320} [2024-06-03 19:33:57,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-03 19:33:57,886 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 320 transitions, 3575 flow [2024-06-03 19:33:57,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:57,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:57,886 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 19:33:57,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 19:33:57,886 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 19:33:57,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:57,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1782753136, now seen corresponding path program 1 times [2024-06-03 19:33:57,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:57,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399769580] [2024-06-03 19:33:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:57,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:58,615 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 19:33:58,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:58,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399769580] [2024-06-03 19:33:58,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399769580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:58,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:58,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:58,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846108731] [2024-06-03 19:33:58,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:58,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:58,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:58,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:58,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:58,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:58,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 320 transitions, 3575 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 19:33:58,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:58,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:58,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:59,673 INFO L124 PetriNetUnfolderBase]: 2834/4403 cut-off events. [2024-06-03 19:33:59,674 INFO L125 PetriNetUnfolderBase]: For 495704/495716 co-relation queries the response was YES. [2024-06-03 19:33:59,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39504 conditions, 4403 events. 2834/4403 cut-off events. For 495704/495716 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 24090 event pairs, 517 based on Foata normal form. 14/4414 useless extension candidates. Maximal degree in co-relation 39385. Up to 4069 conditions per place. [2024-06-03 19:33:59,730 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 38 changer transitions 0/351 dead transitions. [2024-06-03 19:33:59,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 351 transitions, 4462 flow [2024-06-03 19:33:59,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 19:33:59,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 19:33:59,731 INFO L175 Difference]: Start difference. First operand has 238 places, 320 transitions, 3575 flow. Second operand 8 states and 139 transitions. [2024-06-03 19:33:59,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 351 transitions, 4462 flow [2024-06-03 19:34:00,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 351 transitions, 4349 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-03 19:34:00,557 INFO L231 Difference]: Finished difference. Result has 240 places, 323 transitions, 3650 flow [2024-06-03 19:34:00,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3462, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3650, PETRI_PLACES=240, PETRI_TRANSITIONS=323} [2024-06-03 19:34:00,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-03 19:34:00,557 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 323 transitions, 3650 flow [2024-06-03 19:34:00,558 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 19:34:00,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:00,558 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 19:34:00,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 19:34:00,558 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:34:00,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:00,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1774182256, now seen corresponding path program 2 times [2024-06-03 19:34:00,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:00,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168172531] [2024-06-03 19:34:00,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:00,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:01,403 INFO 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 19:34:01,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:01,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168172531] [2024-06-03 19:34:01,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168172531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:01,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:01,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:34:01,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333153526] [2024-06-03 19:34:01,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:01,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:34:01,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:01,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:34:01,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:34:01,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:01,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 323 transitions, 3650 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 19:34:01,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:01,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:01,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:02,422 INFO L124 PetriNetUnfolderBase]: 2850/4427 cut-off events. [2024-06-03 19:34:02,423 INFO L125 PetriNetUnfolderBase]: For 509646/509658 co-relation queries the response was YES. [2024-06-03 19:34:02,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40188 conditions, 4427 events. 2850/4427 cut-off events. For 509646/509658 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 24319 event pairs, 671 based on Foata normal form. 14/4438 useless extension candidates. Maximal degree in co-relation 40068. Up to 4146 conditions per place. [2024-06-03 19:34:02,474 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 307 selfloop transitions, 39 changer transitions 0/350 dead transitions. [2024-06-03 19:34:02,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 350 transitions, 4529 flow [2024-06-03 19:34:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:02,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 19:34:02,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 19:34:02,476 INFO L175 Difference]: Start difference. First operand has 240 places, 323 transitions, 3650 flow. Second operand 8 states and 136 transitions. [2024-06-03 19:34:02,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 350 transitions, 4529 flow [2024-06-03 19:34:03,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 350 transitions, 4363 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-03 19:34:03,181 INFO L231 Difference]: Finished difference. Result has 242 places, 326 transitions, 3680 flow [2024-06-03 19:34:03,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3484, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3680, PETRI_PLACES=242, PETRI_TRANSITIONS=326} [2024-06-03 19:34:03,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-03 19:34:03,182 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 326 transitions, 3680 flow [2024-06-03 19:34:03,182 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 19:34:03,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:03,182 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 19:34:03,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 19:34:03,182 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 19:34:03,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:03,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1774171344, now seen corresponding path program 1 times [2024-06-03 19:34:03,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:03,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305729464] [2024-06-03 19:34:03,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:03,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:04,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:04,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305729464] [2024-06-03 19:34:04,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305729464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:04,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:04,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:34:04,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117368258] [2024-06-03 19:34:04,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:04,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:34:04,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:04,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:34:04,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:34:04,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:04,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 326 transitions, 3680 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:04,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:04,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:04,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:05,175 INFO L124 PetriNetUnfolderBase]: 2870/4455 cut-off events. [2024-06-03 19:34:05,175 INFO L125 PetriNetUnfolderBase]: For 523029/523041 co-relation queries the response was YES. [2024-06-03 19:34:05,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40671 conditions, 4455 events. 2870/4455 cut-off events. For 523029/523041 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24407 event pairs, 670 based on Foata normal form. 14/4466 useless extension candidates. Maximal degree in co-relation 40550. Up to 4168 conditions per place. [2024-06-03 19:34:05,228 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 307 selfloop transitions, 44 changer transitions 0/355 dead transitions. [2024-06-03 19:34:05,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 355 transitions, 4601 flow [2024-06-03 19:34:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:34:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:34:05,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 19:34:05,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-03 19:34:05,230 INFO L175 Difference]: Start difference. First operand has 242 places, 326 transitions, 3680 flow. Second operand 9 states and 150 transitions. [2024-06-03 19:34:05,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 355 transitions, 4601 flow [2024-06-03 19:34:05,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 355 transitions, 4427 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-03 19:34:05,823 INFO L231 Difference]: Finished difference. Result has 245 places, 330 transitions, 3727 flow [2024-06-03 19:34:05,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3506, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3727, PETRI_PLACES=245, PETRI_TRANSITIONS=330} [2024-06-03 19:34:05,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-03 19:34:05,824 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 330 transitions, 3727 flow [2024-06-03 19:34:05,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:05,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:05,824 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 19:34:05,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 19:34:05,825 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 19:34:05,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:05,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1664423284, now seen corresponding path program 1 times [2024-06-03 19:34:05,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:05,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464733307] [2024-06-03 19:34:05,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:05,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:06,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:06,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464733307] [2024-06-03 19:34:06,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464733307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:06,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:06,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:34:06,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30706713] [2024-06-03 19:34:06,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:06,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:34:06,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:06,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:34:06,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:34:06,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:06,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 330 transitions, 3727 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 19:34:06,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:06,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:06,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:07,719 INFO L124 PetriNetUnfolderBase]: 2890/4477 cut-off events. [2024-06-03 19:34:07,719 INFO L125 PetriNetUnfolderBase]: For 537098/537105 co-relation queries the response was YES. [2024-06-03 19:34:07,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41301 conditions, 4477 events. 2890/4477 cut-off events. For 537098/537105 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 24537 event pairs, 590 based on Foata normal form. 5/4478 useless extension candidates. Maximal degree in co-relation 41179. Up to 3896 conditions per place. [2024-06-03 19:34:07,767 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 280 selfloop transitions, 84 changer transitions 0/368 dead transitions. [2024-06-03 19:34:07,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 368 transitions, 4714 flow [2024-06-03 19:34:07,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:07,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:07,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 19:34:07,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-03 19:34:07,769 INFO L175 Difference]: Start difference. First operand has 245 places, 330 transitions, 3727 flow. Second operand 8 states and 142 transitions. [2024-06-03 19:34:07,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 368 transitions, 4714 flow [2024-06-03 19:34:08,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 368 transitions, 4527 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-03 19:34:08,467 INFO L231 Difference]: Finished difference. Result has 247 places, 343 transitions, 3915 flow [2024-06-03 19:34:08,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3540, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3915, PETRI_PLACES=247, PETRI_TRANSITIONS=343} [2024-06-03 19:34:08,470 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-03 19:34:08,471 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 343 transitions, 3915 flow [2024-06-03 19:34:08,471 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 19:34:08,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:08,471 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 19:34:08,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 19:34:08,471 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 19:34:08,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:08,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1664303314, now seen corresponding path program 2 times [2024-06-03 19:34:08,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:08,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124034158] [2024-06-03 19:34:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:08,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:09,251 INFO 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 19:34:09,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:09,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124034158] [2024-06-03 19:34:09,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124034158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:09,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:09,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:34:09,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269816416] [2024-06-03 19:34:09,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:09,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:34:09,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:09,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:34:09,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:34:09,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:09,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 343 transitions, 3915 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 19:34:09,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:09,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:09,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:10,385 INFO L124 PetriNetUnfolderBase]: 2926/4528 cut-off events. [2024-06-03 19:34:10,385 INFO L125 PetriNetUnfolderBase]: For 560944/560951 co-relation queries the response was YES. [2024-06-03 19:34:10,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43022 conditions, 4528 events. 2926/4528 cut-off events. For 560944/560951 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24790 event pairs, 607 based on Foata normal form. 5/4529 useless extension candidates. Maximal degree in co-relation 42898. Up to 3904 conditions per place. [2024-06-03 19:34:10,435 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 277 selfloop transitions, 93 changer transitions 0/374 dead transitions. [2024-06-03 19:34:10,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 374 transitions, 5111 flow [2024-06-03 19:34:10,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:10,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:10,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 19:34:10,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-03 19:34:10,437 INFO L175 Difference]: Start difference. First operand has 247 places, 343 transitions, 3915 flow. Second operand 8 states and 143 transitions. [2024-06-03 19:34:10,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 374 transitions, 5111 flow [2024-06-03 19:34:11,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 374 transitions, 4889 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-03 19:34:11,101 INFO L231 Difference]: Finished difference. Result has 251 places, 351 transitions, 4118 flow [2024-06-03 19:34:11,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3693, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4118, PETRI_PLACES=251, PETRI_TRANSITIONS=351} [2024-06-03 19:34:11,101 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-03 19:34:11,102 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 351 transitions, 4118 flow [2024-06-03 19:34:11,102 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 19:34:11,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:11,102 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 19:34:11,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 19:34:11,102 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 19:34:11,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:11,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1664303128, now seen corresponding path program 1 times [2024-06-03 19:34:11,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:11,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346499524] [2024-06-03 19:34:11,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:11,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:12,042 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 19:34:12,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:12,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346499524] [2024-06-03 19:34:12,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346499524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:12,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:12,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:34:12,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661073392] [2024-06-03 19:34:12,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:12,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:34:12,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:12,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:34:12,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:34:12,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:12,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 351 transitions, 4118 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 19:34:12,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:12,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:12,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:13,096 INFO L124 PetriNetUnfolderBase]: 2936/4542 cut-off events. [2024-06-03 19:34:13,096 INFO L125 PetriNetUnfolderBase]: For 573288/573298 co-relation queries the response was YES. [2024-06-03 19:34:13,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43644 conditions, 4542 events. 2936/4542 cut-off events. For 573288/573298 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 24895 event pairs, 606 based on Foata normal form. 7/4546 useless extension candidates. Maximal degree in co-relation 43519. Up to 4268 conditions per place. [2024-06-03 19:34:13,150 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 331 selfloop transitions, 40 changer transitions 0/375 dead transitions. [2024-06-03 19:34:13,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 375 transitions, 4998 flow [2024-06-03 19:34:13,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:13,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:13,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 19:34:13,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-03 19:34:13,152 INFO L175 Difference]: Start difference. First operand has 251 places, 351 transitions, 4118 flow. Second operand 8 states and 133 transitions. [2024-06-03 19:34:13,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 375 transitions, 4998 flow [2024-06-03 19:34:14,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 375 transitions, 4772 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-03 19:34:14,091 INFO L231 Difference]: Finished difference. Result has 255 places, 355 transitions, 4061 flow [2024-06-03 19:34:14,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3892, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4061, PETRI_PLACES=255, PETRI_TRANSITIONS=355} [2024-06-03 19:34:14,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-03 19:34:14,092 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 355 transitions, 4061 flow [2024-06-03 19:34:14,092 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 19:34:14,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:14,092 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 19:34:14,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 19:34:14,093 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 19:34:14,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:14,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1487171794, now seen corresponding path program 3 times [2024-06-03 19:34:14,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:14,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503024047] [2024-06-03 19:34:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:14,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:14,879 INFO 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 19:34:14,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:14,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503024047] [2024-06-03 19:34:14,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503024047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:14,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:14,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:34:14,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218789465] [2024-06-03 19:34:14,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:14,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:34:14,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:14,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:34:14,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:34:14,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:14,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 355 transitions, 4061 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 19:34:14,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:14,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:14,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:15,954 INFO L124 PetriNetUnfolderBase]: 2988/4623 cut-off events. [2024-06-03 19:34:15,954 INFO L125 PetriNetUnfolderBase]: For 604279/604286 co-relation queries the response was YES. [2024-06-03 19:34:15,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44822 conditions, 4623 events. 2988/4623 cut-off events. For 604279/604286 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25346 event pairs, 618 based on Foata normal form. 5/4624 useless extension candidates. Maximal degree in co-relation 44695. Up to 3859 conditions per place. [2024-06-03 19:34:16,014 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 280 selfloop transitions, 98 changer transitions 0/382 dead transitions. [2024-06-03 19:34:16,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 382 transitions, 5277 flow [2024-06-03 19:34:16,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:16,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:16,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 19:34:16,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 19:34:16,016 INFO L175 Difference]: Start difference. First operand has 255 places, 355 transitions, 4061 flow. Second operand 8 states and 139 transitions. [2024-06-03 19:34:16,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 382 transitions, 5277 flow [2024-06-03 19:34:16,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 382 transitions, 5158 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 19:34:16,940 INFO L231 Difference]: Finished difference. Result has 257 places, 362 transitions, 4353 flow [2024-06-03 19:34:16,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3942, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4353, PETRI_PLACES=257, PETRI_TRANSITIONS=362} [2024-06-03 19:34:16,940 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-03 19:34:16,940 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 362 transitions, 4353 flow [2024-06-03 19:34:16,941 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 19:34:16,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:16,941 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 19:34:16,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 19:34:16,941 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 19:34:16,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:16,941 INFO L85 PathProgramCache]: Analyzing trace with hash -133494272, now seen corresponding path program 2 times [2024-06-03 19:34:16,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:16,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655365782] [2024-06-03 19:34:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:16,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:17,916 INFO 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 19:34:17,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:17,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655365782] [2024-06-03 19:34:17,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655365782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:17,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:17,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:34:17,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755585265] [2024-06-03 19:34:17,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:17,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:34:17,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:17,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:34:17,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:34:17,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:17,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 362 transitions, 4353 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 19:34:17,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:17,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:17,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:18,947 INFO L124 PetriNetUnfolderBase]: 2998/4631 cut-off events. [2024-06-03 19:34:18,947 INFO L125 PetriNetUnfolderBase]: For 618026/618036 co-relation queries the response was YES. [2024-06-03 19:34:18,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45846 conditions, 4631 events. 2998/4631 cut-off events. For 618026/618036 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25377 event pairs, 613 based on Foata normal form. 7/4635 useless extension candidates. Maximal degree in co-relation 45718. Up to 4316 conditions per place. [2024-06-03 19:34:19,007 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 329 selfloop transitions, 49 changer transitions 0/382 dead transitions. [2024-06-03 19:34:19,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 382 transitions, 5239 flow [2024-06-03 19:34:19,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:19,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:19,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 19:34:19,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-03 19:34:19,008 INFO L175 Difference]: Start difference. First operand has 257 places, 362 transitions, 4353 flow. Second operand 8 states and 131 transitions. [2024-06-03 19:34:19,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 382 transitions, 5239 flow [2024-06-03 19:34:19,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 382 transitions, 5032 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-03 19:34:19,899 INFO L231 Difference]: Finished difference. Result has 261 places, 366 transitions, 4341 flow [2024-06-03 19:34:19,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4146, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4341, PETRI_PLACES=261, PETRI_TRANSITIONS=366} [2024-06-03 19:34:19,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-03 19:34:19,900 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 366 transitions, 4341 flow [2024-06-03 19:34:19,900 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 19:34:19,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:19,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:19,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 19:34:19,900 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:34:19,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:19,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1659654988, now seen corresponding path program 3 times [2024-06-03 19:34:19,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:19,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656894308] [2024-06-03 19:34:19,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:19,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:20,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:20,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656894308] [2024-06-03 19:34:20,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656894308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:20,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:20,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:34:20,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488053935] [2024-06-03 19:34:20,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:20,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:34:20,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:20,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:34:20,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:34:20,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:20,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 366 transitions, 4341 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 19:34:20,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:20,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:20,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:21,866 INFO L124 PetriNetUnfolderBase]: 3000/4634 cut-off events. [2024-06-03 19:34:21,866 INFO L125 PetriNetUnfolderBase]: For 626013/626023 co-relation queries the response was YES. [2024-06-03 19:34:21,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45853 conditions, 4634 events. 3000/4634 cut-off events. For 626013/626023 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25403 event pairs, 589 based on Foata normal form. 7/4638 useless extension candidates. Maximal degree in co-relation 45723. Up to 4271 conditions per place. [2024-06-03 19:34:21,928 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 315 selfloop transitions, 67 changer transitions 0/386 dead transitions. [2024-06-03 19:34:21,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 386 transitions, 5389 flow [2024-06-03 19:34:21,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:21,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:21,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 19:34:21,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-03 19:34:21,931 INFO L175 Difference]: Start difference. First operand has 261 places, 366 transitions, 4341 flow. Second operand 8 states and 133 transitions. [2024-06-03 19:34:21,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 386 transitions, 5389 flow [2024-06-03 19:34:23,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 386 transitions, 5244 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 19:34:23,045 INFO L231 Difference]: Finished difference. Result has 263 places, 369 transitions, 4414 flow [2024-06-03 19:34:23,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4196, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4414, PETRI_PLACES=263, PETRI_TRANSITIONS=369} [2024-06-03 19:34:23,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-03 19:34:23,046 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 369 transitions, 4414 flow [2024-06-03 19:34:23,046 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 19:34:23,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:23,046 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 19:34:23,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 19:34:23,046 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:34:23,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:23,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1487294926, now seen corresponding path program 3 times [2024-06-03 19:34:23,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:23,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828356737] [2024-06-03 19:34:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:23,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:23,846 INFO 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 19:34:23,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:23,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828356737] [2024-06-03 19:34:23,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828356737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:23,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:23,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:34:23,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915917329] [2024-06-03 19:34:23,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:23,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:34:23,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:23,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:34:23,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:34:23,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:23,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 369 transitions, 4414 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 19:34:23,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:23,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:23,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:24,896 INFO L124 PetriNetUnfolderBase]: 3016/4658 cut-off events. [2024-06-03 19:34:24,897 INFO L125 PetriNetUnfolderBase]: For 649420/649430 co-relation queries the response was YES. [2024-06-03 19:34:24,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46373 conditions, 4658 events. 3016/4658 cut-off events. For 649420/649430 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 25540 event pairs, 589 based on Foata normal form. 9/4664 useless extension candidates. Maximal degree in co-relation 46242. Up to 4337 conditions per place. [2024-06-03 19:34:24,958 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 336 selfloop transitions, 49 changer transitions 0/389 dead transitions. [2024-06-03 19:34:24,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 389 transitions, 5356 flow [2024-06-03 19:34:24,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:24,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:24,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 19:34:24,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-03 19:34:24,959 INFO L175 Difference]: Start difference. First operand has 263 places, 369 transitions, 4414 flow. Second operand 8 states and 131 transitions. [2024-06-03 19:34:24,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 389 transitions, 5356 flow [2024-06-03 19:34:25,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 389 transitions, 5199 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-03 19:34:25,996 INFO L231 Difference]: Finished difference. Result has 266 places, 372 transitions, 4489 flow [2024-06-03 19:34:25,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4257, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4489, PETRI_PLACES=266, PETRI_TRANSITIONS=372} [2024-06-03 19:34:25,997 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-03 19:34:25,997 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 372 transitions, 4489 flow [2024-06-03 19:34:25,997 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 19:34:25,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:25,997 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 19:34:25,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 19:34:25,998 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:34:25,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:25,998 INFO L85 PathProgramCache]: Analyzing trace with hash -750458844, now seen corresponding path program 2 times [2024-06-03 19:34:25,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:25,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406596578] [2024-06-03 19:34:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:25,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:27,189 INFO 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 19:34:27,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:27,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406596578] [2024-06-03 19:34:27,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406596578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:27,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:27,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:34:27,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277155753] [2024-06-03 19:34:27,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:27,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:34:27,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:27,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:34:27,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:34:27,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:27,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 372 transitions, 4489 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:27,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:27,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:27,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:28,232 INFO L124 PetriNetUnfolderBase]: 3026/4672 cut-off events. [2024-06-03 19:34:28,232 INFO L125 PetriNetUnfolderBase]: For 659220/659230 co-relation queries the response was YES. [2024-06-03 19:34:28,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46840 conditions, 4672 events. 3026/4672 cut-off events. For 659220/659230 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 25647 event pairs, 591 based on Foata normal form. 7/4676 useless extension candidates. Maximal degree in co-relation 46708. Up to 4351 conditions per place. [2024-06-03 19:34:28,303 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 335 selfloop transitions, 54 changer transitions 0/393 dead transitions. [2024-06-03 19:34:28,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 393 transitions, 5457 flow [2024-06-03 19:34:28,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:34:28,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:34:28,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-03 19:34:28,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:34:28,305 INFO L175 Difference]: Start difference. First operand has 266 places, 372 transitions, 4489 flow. Second operand 9 states and 144 transitions. [2024-06-03 19:34:28,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 393 transitions, 5457 flow [2024-06-03 19:34:29,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 393 transitions, 5247 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-03 19:34:29,398 INFO L231 Difference]: Finished difference. Result has 269 places, 376 transitions, 4542 flow [2024-06-03 19:34:29,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4279, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4542, PETRI_PLACES=269, PETRI_TRANSITIONS=376} [2024-06-03 19:34:29,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-03 19:34:29,399 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 376 transitions, 4542 flow [2024-06-03 19:34:29,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:29,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:29,400 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 19:34:29,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 19:34:29,400 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:34:29,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:29,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1486938054, now seen corresponding path program 3 times [2024-06-03 19:34:29,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:29,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791202522] [2024-06-03 19:34:29,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:29,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:30,598 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 19:34:30,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:30,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791202522] [2024-06-03 19:34:30,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791202522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:30,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:30,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:34:30,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451308881] [2024-06-03 19:34:30,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:30,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:34:30,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:30,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:34:30,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:34:30,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:30,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 376 transitions, 4542 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:30,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:30,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:30,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:31,663 INFO L124 PetriNetUnfolderBase]: 3122/4820 cut-off events. [2024-06-03 19:34:31,663 INFO L125 PetriNetUnfolderBase]: For 716814/716824 co-relation queries the response was YES. [2024-06-03 19:34:31,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49807 conditions, 4820 events. 3122/4820 cut-off events. For 716814/716824 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 26579 event pairs, 591 based on Foata normal form. 9/4826 useless extension candidates. Maximal degree in co-relation 49674. Up to 4319 conditions per place. [2024-06-03 19:34:31,727 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 326 selfloop transitions, 81 changer transitions 0/411 dead transitions. [2024-06-03 19:34:31,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 411 transitions, 6280 flow [2024-06-03 19:34:31,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:34:31,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:34:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 19:34:31,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-03 19:34:31,729 INFO L175 Difference]: Start difference. First operand has 269 places, 376 transitions, 4542 flow. Second operand 9 states and 152 transitions. [2024-06-03 19:34:31,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 411 transitions, 6280 flow [2024-06-03 19:34:32,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 411 transitions, 6045 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-03 19:34:32,734 INFO L231 Difference]: Finished difference. Result has 273 places, 388 transitions, 4949 flow [2024-06-03 19:34:32,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4307, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4949, PETRI_PLACES=273, PETRI_TRANSITIONS=388} [2024-06-03 19:34:32,735 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-03 19:34:32,735 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 388 transitions, 4949 flow [2024-06-03 19:34:32,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:32,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:32,735 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 19:34:32,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 19:34:32,735 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 19:34:32,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:32,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1486925530, now seen corresponding path program 1 times [2024-06-03 19:34:32,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:32,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069168909] [2024-06-03 19:34:32,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:32,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:33,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:33,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069168909] [2024-06-03 19:34:33,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069168909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:33,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:33,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:34:33,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263223274] [2024-06-03 19:34:33,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:33,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:34:33,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:33,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:34:33,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:34:34,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:34,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 388 transitions, 4949 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:34,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:34,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:34,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:35,047 INFO L124 PetriNetUnfolderBase]: 3119/4819 cut-off events. [2024-06-03 19:34:35,047 INFO L125 PetriNetUnfolderBase]: For 725505/725511 co-relation queries the response was YES. [2024-06-03 19:34:35,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50540 conditions, 4819 events. 3119/4819 cut-off events. For 725505/725511 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 26598 event pairs, 617 based on Foata normal form. 7/4824 useless extension candidates. Maximal degree in co-relation 50404. Up to 4645 conditions per place. [2024-06-03 19:34:35,113 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 380 selfloop transitions, 21 changer transitions 0/405 dead transitions. [2024-06-03 19:34:35,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 405 transitions, 5808 flow [2024-06-03 19:34:35,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:35,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:35,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-03 19:34:35,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-03 19:34:35,115 INFO L175 Difference]: Start difference. First operand has 273 places, 388 transitions, 4949 flow. Second operand 8 states and 125 transitions. [2024-06-03 19:34:35,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 405 transitions, 5808 flow [2024-06-03 19:34:36,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 405 transitions, 5511 flow, removed 122 selfloop flow, removed 4 redundant places. [2024-06-03 19:34:36,070 INFO L231 Difference]: Finished difference. Result has 277 places, 388 transitions, 4702 flow [2024-06-03 19:34:36,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4652, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4702, PETRI_PLACES=277, PETRI_TRANSITIONS=388} [2024-06-03 19:34:36,070 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-03 19:34:36,071 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 388 transitions, 4702 flow [2024-06-03 19:34:36,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:36,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:36,071 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 19:34:36,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 19:34:36,071 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 19:34:36,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:36,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1486925964, now seen corresponding path program 4 times [2024-06-03 19:34:36,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:36,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522987947] [2024-06-03 19:34:36,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:36,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:37,103 INFO 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 19:34:37,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:37,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522987947] [2024-06-03 19:34:37,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522987947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:37,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:37,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:34:37,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675021726] [2024-06-03 19:34:37,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:37,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:34:37,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:37,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:34:37,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:34:37,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:37,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 388 transitions, 4702 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:37,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:37,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:37,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:38,387 INFO L124 PetriNetUnfolderBase]: 3111/4803 cut-off events. [2024-06-03 19:34:38,388 INFO L125 PetriNetUnfolderBase]: For 727215/727225 co-relation queries the response was YES. [2024-06-03 19:34:38,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49503 conditions, 4803 events. 3111/4803 cut-off events. For 727215/727225 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 26470 event pairs, 597 based on Foata normal form. 9/4809 useless extension candidates. Maximal degree in co-relation 49365. Up to 4315 conditions per place. [2024-06-03 19:34:38,449 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 325 selfloop transitions, 81 changer transitions 0/410 dead transitions. [2024-06-03 19:34:38,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 410 transitions, 6020 flow [2024-06-03 19:34:38,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:34:38,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:34:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 19:34:38,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-03 19:34:38,451 INFO L175 Difference]: Start difference. First operand has 277 places, 388 transitions, 4702 flow. Second operand 9 states and 150 transitions. [2024-06-03 19:34:38,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 410 transitions, 6020 flow [2024-06-03 19:34:39,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 410 transitions, 5856 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-03 19:34:39,559 INFO L231 Difference]: Finished difference. Result has 279 places, 388 transitions, 4709 flow [2024-06-03 19:34:39,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4538, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4709, PETRI_PLACES=279, PETRI_TRANSITIONS=388} [2024-06-03 19:34:39,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-03 19:34:39,560 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 388 transitions, 4709 flow [2024-06-03 19:34:39,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:39,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:39,560 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 19:34:39,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 19:34:39,561 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 19:34:39,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:39,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1636445836, now seen corresponding path program 4 times [2024-06-03 19:34:39,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:39,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991218745] [2024-06-03 19:34:39,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:39,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:40,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:40,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991218745] [2024-06-03 19:34:40,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991218745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:40,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:40,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:34:40,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247985934] [2024-06-03 19:34:40,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:40,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:34:40,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:40,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:34:40,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:34:40,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:40,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 388 transitions, 4709 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 19:34:40,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:40,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:40,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:41,564 INFO L124 PetriNetUnfolderBase]: 3121/4806 cut-off events. [2024-06-03 19:34:41,564 INFO L125 PetriNetUnfolderBase]: For 737771/737779 co-relation queries the response was YES. [2024-06-03 19:34:41,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49922 conditions, 4806 events. 3121/4806 cut-off events. For 737771/737779 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 26416 event pairs, 616 based on Foata normal form. 4/4790 useless extension candidates. Maximal degree in co-relation 49783. Up to 4232 conditions per place. [2024-06-03 19:34:41,631 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 326 selfloop transitions, 88 changer transitions 0/418 dead transitions. [2024-06-03 19:34:41,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 418 transitions, 5743 flow [2024-06-03 19:34:41,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:41,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 19:34:41,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 19:34:41,632 INFO L175 Difference]: Start difference. First operand has 279 places, 388 transitions, 4709 flow. Second operand 8 states and 139 transitions. [2024-06-03 19:34:41,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 418 transitions, 5743 flow [2024-06-03 19:34:42,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 418 transitions, 5554 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 19:34:42,701 INFO L231 Difference]: Finished difference. Result has 280 places, 395 transitions, 4838 flow [2024-06-03 19:34:42,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4520, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4838, PETRI_PLACES=280, PETRI_TRANSITIONS=395} [2024-06-03 19:34:42,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-03 19:34:42,701 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 395 transitions, 4838 flow [2024-06-03 19:34:42,702 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 19:34:42,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:42,702 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 19:34:42,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 19:34:42,702 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 19:34:42,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:42,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1055362862, now seen corresponding path program 5 times [2024-06-03 19:34:42,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:42,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460280105] [2024-06-03 19:34:42,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:42,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:43,442 INFO 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 19:34:43,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:43,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460280105] [2024-06-03 19:34:43,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460280105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:43,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:43,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:34:43,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121969120] [2024-06-03 19:34:43,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:43,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:34:43,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:43,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:34:43,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:34:43,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:43,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 395 transitions, 4838 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 19:34:43,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:43,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:43,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:44,683 INFO L124 PetriNetUnfolderBase]: 3131/4821 cut-off events. [2024-06-03 19:34:44,683 INFO L125 PetriNetUnfolderBase]: For 756744/756752 co-relation queries the response was YES. [2024-06-03 19:34:44,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50688 conditions, 4821 events. 3131/4821 cut-off events. For 756744/756752 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 26468 event pairs, 622 based on Foata normal form. 4/4805 useless extension candidates. Maximal degree in co-relation 50548. Up to 4216 conditions per place. [2024-06-03 19:34:44,749 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 324 selfloop transitions, 95 changer transitions 0/423 dead transitions. [2024-06-03 19:34:44,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 423 transitions, 6132 flow [2024-06-03 19:34:44,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:44,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 19:34:44,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 19:34:44,751 INFO L175 Difference]: Start difference. First operand has 280 places, 395 transitions, 4838 flow. Second operand 8 states and 139 transitions. [2024-06-03 19:34:44,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 423 transitions, 6132 flow [2024-06-03 19:34:46,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 423 transitions, 5900 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-03 19:34:46,005 INFO L231 Difference]: Finished difference. Result has 284 places, 401 transitions, 5000 flow [2024-06-03 19:34:46,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4606, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5000, PETRI_PLACES=284, PETRI_TRANSITIONS=401} [2024-06-03 19:34:46,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-03 19:34:46,006 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 401 transitions, 5000 flow [2024-06-03 19:34:46,006 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 19:34:46,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:46,007 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 19:34:46,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 19:34:46,007 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 19:34:46,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:46,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1055363048, now seen corresponding path program 4 times [2024-06-03 19:34:46,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:46,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296958532] [2024-06-03 19:34:46,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:46,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:46,941 INFO 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 19:34:46,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:46,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296958532] [2024-06-03 19:34:46,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296958532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:46,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:46,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:34:46,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655618586] [2024-06-03 19:34:46,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:46,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:34:46,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:46,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:34:46,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:34:47,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:47,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 401 transitions, 5000 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 19:34:47,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:47,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:47,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:48,093 INFO L124 PetriNetUnfolderBase]: 3122/4812 cut-off events. [2024-06-03 19:34:48,093 INFO L125 PetriNetUnfolderBase]: For 764947/764955 co-relation queries the response was YES. [2024-06-03 19:34:48,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50676 conditions, 4812 events. 3122/4812 cut-off events. For 764947/764955 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 26461 event pairs, 622 based on Foata normal form. 3/4805 useless extension candidates. Maximal degree in co-relation 50535. Up to 4541 conditions per place. [2024-06-03 19:34:48,163 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 376 selfloop transitions, 39 changer transitions 0/419 dead transitions. [2024-06-03 19:34:48,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 419 transitions, 5890 flow [2024-06-03 19:34:48,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:48,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:48,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-03 19:34:48,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-03 19:34:48,165 INFO L175 Difference]: Start difference. First operand has 284 places, 401 transitions, 5000 flow. Second operand 8 states and 129 transitions. [2024-06-03 19:34:48,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 419 transitions, 5890 flow [2024-06-03 19:34:49,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 419 transitions, 5660 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-03 19:34:49,440 INFO L231 Difference]: Finished difference. Result has 288 places, 401 transitions, 4854 flow [2024-06-03 19:34:49,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4770, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4854, PETRI_PLACES=288, PETRI_TRANSITIONS=401} [2024-06-03 19:34:49,441 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-03 19:34:49,441 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 401 transitions, 4854 flow [2024-06-03 19:34:49,441 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 19:34:49,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:49,441 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 19:34:49,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 19:34:49,441 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 19:34:49,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:49,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1283144042, now seen corresponding path program 6 times [2024-06-03 19:34:49,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:49,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544345201] [2024-06-03 19:34:49,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:49,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:50,189 INFO 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 19:34:50,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:50,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544345201] [2024-06-03 19:34:50,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544345201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:50,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:50,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:34:50,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766048508] [2024-06-03 19:34:50,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:50,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:34:50,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:50,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:34:50,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:34:50,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:50,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 401 transitions, 4854 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 19:34:50,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:50,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:50,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:51,380 INFO L124 PetriNetUnfolderBase]: 3124/4809 cut-off events. [2024-06-03 19:34:51,380 INFO L125 PetriNetUnfolderBase]: For 777958/777966 co-relation queries the response was YES. [2024-06-03 19:34:51,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50645 conditions, 4809 events. 3124/4809 cut-off events. For 777958/777966 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 26420 event pairs, 610 based on Foata normal form. 4/4793 useless extension candidates. Maximal degree in co-relation 50502. Up to 4236 conditions per place. [2024-06-03 19:34:51,448 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 332 selfloop transitions, 95 changer transitions 0/431 dead transitions. [2024-06-03 19:34:51,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 431 transitions, 5915 flow [2024-06-03 19:34:51,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:51,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:51,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:34:51,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-03 19:34:51,449 INFO L175 Difference]: Start difference. First operand has 288 places, 401 transitions, 4854 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:34:51,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 431 transitions, 5915 flow [2024-06-03 19:34:53,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 431 transitions, 5752 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-03 19:34:53,022 INFO L231 Difference]: Finished difference. Result has 289 places, 408 transitions, 5022 flow [2024-06-03 19:34:53,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4691, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5022, PETRI_PLACES=289, PETRI_TRANSITIONS=408} [2024-06-03 19:34:53,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-03 19:34:53,023 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 408 transitions, 5022 flow [2024-06-03 19:34:53,023 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 19:34:53,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:53,023 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 19:34:53,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 19:34:53,024 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 19:34:53,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:53,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1294571882, now seen corresponding path program 7 times [2024-06-03 19:34:53,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:53,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307753416] [2024-06-03 19:34:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:53,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:53,764 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 19:34:53,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:53,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307753416] [2024-06-03 19:34:53,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307753416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:53,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:53,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:34:53,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675885352] [2024-06-03 19:34:53,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:53,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:34:53,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:53,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:34:53,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:34:53,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:53,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 408 transitions, 5022 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 19:34:53,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:53,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:53,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:54,876 INFO L124 PetriNetUnfolderBase]: 3134/4827 cut-off events. [2024-06-03 19:34:54,877 INFO L125 PetriNetUnfolderBase]: For 796548/796556 co-relation queries the response was YES. [2024-06-03 19:34:54,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51577 conditions, 4827 events. 3134/4827 cut-off events. For 796548/796556 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 26596 event pairs, 604 based on Foata normal form. 4/4809 useless extension candidates. Maximal degree in co-relation 51432. Up to 4208 conditions per place. [2024-06-03 19:34:54,944 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 321 selfloop transitions, 107 changer transitions 0/432 dead transitions. [2024-06-03 19:34:54,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 432 transitions, 6074 flow [2024-06-03 19:34:54,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:54,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:54,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:34:54,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-03 19:34:54,946 INFO L175 Difference]: Start difference. First operand has 289 places, 408 transitions, 5022 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:34:54,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 432 transitions, 6074 flow [2024-06-03 19:34:56,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 432 transitions, 5870 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-03 19:34:56,450 INFO L231 Difference]: Finished difference. Result has 293 places, 411 transitions, 5152 flow [2024-06-03 19:34:56,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4818, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5152, PETRI_PLACES=293, PETRI_TRANSITIONS=411} [2024-06-03 19:34:56,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-03 19:34:56,451 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 411 transitions, 5152 flow [2024-06-03 19:34:56,451 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 19:34:56,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:56,451 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 19:34:56,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 19:34:56,452 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 19:34:56,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:56,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1409863052, now seen corresponding path program 8 times [2024-06-03 19:34:56,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:56,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827306647] [2024-06-03 19:34:56,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:56,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:57,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:57,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:57,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827306647] [2024-06-03 19:34:57,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827306647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:57,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:57,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:34:57,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572830263] [2024-06-03 19:34:57,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:57,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:34:57,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:57,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:34:57,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:34:57,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:57,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 411 transitions, 5152 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 19:34:57,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:57,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:57,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:58,493 INFO L124 PetriNetUnfolderBase]: 3168/4869 cut-off events. [2024-06-03 19:34:58,493 INFO L125 PetriNetUnfolderBase]: For 832101/832109 co-relation queries the response was YES. [2024-06-03 19:34:58,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53075 conditions, 4869 events. 3168/4869 cut-off events. For 832101/832109 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 26782 event pairs, 618 based on Foata normal form. 4/4853 useless extension candidates. Maximal degree in co-relation 52929. Up to 4156 conditions per place. [2024-06-03 19:34:58,577 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 298 selfloop transitions, 138 changer transitions 0/440 dead transitions. [2024-06-03 19:34:58,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 440 transitions, 6820 flow [2024-06-03 19:34:58,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:58,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:58,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 19:34:58,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 19:34:58,578 INFO L175 Difference]: Start difference. First operand has 293 places, 411 transitions, 5152 flow. Second operand 8 states and 140 transitions. [2024-06-03 19:34:58,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 440 transitions, 6820 flow [2024-06-03 19:35:00,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 440 transitions, 6508 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-03 19:35:00,080 INFO L231 Difference]: Finished difference. Result has 295 places, 420 transitions, 5470 flow [2024-06-03 19:35:00,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4840, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5470, PETRI_PLACES=295, PETRI_TRANSITIONS=420} [2024-06-03 19:35:00,080 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-03 19:35:00,081 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 420 transitions, 5470 flow [2024-06-03 19:35:00,081 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 19:35:00,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:00,081 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 19:35:00,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 19:35:00,081 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:35:00,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:00,082 INFO L85 PathProgramCache]: Analyzing trace with hash 734729648, now seen corresponding path program 5 times [2024-06-03 19:35:00,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:00,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320574952] [2024-06-03 19:35:00,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:00,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:01,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:01,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320574952] [2024-06-03 19:35:01,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320574952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:01,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:01,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:01,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941106462] [2024-06-03 19:35:01,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:01,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:01,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:01,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:01,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:01,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:35:01,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 420 transitions, 5470 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 19:35:01,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:01,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:35:01,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:02,437 INFO L124 PetriNetUnfolderBase]: 3181/4899 cut-off events. [2024-06-03 19:35:02,437 INFO L125 PetriNetUnfolderBase]: For 852786/852794 co-relation queries the response was YES. [2024-06-03 19:35:02,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53744 conditions, 4899 events. 3181/4899 cut-off events. For 852786/852794 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 26998 event pairs, 607 based on Foata normal form. 3/4892 useless extension candidates. Maximal degree in co-relation 53597. Up to 4587 conditions per place. [2024-06-03 19:35:02,521 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 379 selfloop transitions, 60 changer transitions 0/443 dead transitions. [2024-06-03 19:35:02,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 443 transitions, 6735 flow [2024-06-03 19:35:02,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:02,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:02,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 19:35:02,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-03 19:35:02,522 INFO L175 Difference]: Start difference. First operand has 295 places, 420 transitions, 5470 flow. Second operand 8 states and 131 transitions. [2024-06-03 19:35:02,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 443 transitions, 6735 flow [2024-06-03 19:35:04,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 443 transitions, 6489 flow, removed 73 selfloop flow, removed 3 redundant places. [2024-06-03 19:35:04,155 INFO L231 Difference]: Finished difference. Result has 301 places, 427 transitions, 5532 flow [2024-06-03 19:35:04,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5224, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5532, PETRI_PLACES=301, PETRI_TRANSITIONS=427} [2024-06-03 19:35:04,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-03 19:35:04,156 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 427 transitions, 5532 flow [2024-06-03 19:35:04,156 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 19:35:04,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:04,156 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 19:35:04,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 19:35:04,157 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:35:04,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:04,157 INFO L85 PathProgramCache]: Analyzing trace with hash -661259132, now seen corresponding path program 6 times [2024-06-03 19:35:04,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:04,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649437839] [2024-06-03 19:35:04,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:04,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:05,185 INFO 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 19:35:05,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:05,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649437839] [2024-06-03 19:35:05,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649437839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:05,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:05,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:05,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285564607] [2024-06-03 19:35:05,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:05,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:05,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:05,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:05,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:05,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:35:05,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 427 transitions, 5532 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 19:35:05,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:05,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:35:05,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:06,382 INFO L124 PetriNetUnfolderBase]: 3178/4887 cut-off events. [2024-06-03 19:35:06,383 INFO L125 PetriNetUnfolderBase]: For 861822/861830 co-relation queries the response was YES. [2024-06-03 19:35:06,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53709 conditions, 4887 events. 3178/4887 cut-off events. For 861822/861830 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 26885 event pairs, 617 based on Foata normal form. 3/4880 useless extension candidates. Maximal degree in co-relation 53559. Up to 4599 conditions per place. [2024-06-03 19:35:06,461 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 390 selfloop transitions, 48 changer transitions 0/442 dead transitions. [2024-06-03 19:35:06,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 442 transitions, 6456 flow [2024-06-03 19:35:06,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 19:35:06,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:35:06,462 INFO L175 Difference]: Start difference. First operand has 301 places, 427 transitions, 5532 flow. Second operand 8 states and 128 transitions. [2024-06-03 19:35:06,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 442 transitions, 6456 flow [2024-06-03 19:35:08,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 442 transitions, 6253 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-03 19:35:08,486 INFO L231 Difference]: Finished difference. Result has 304 places, 427 transitions, 5431 flow [2024-06-03 19:35:08,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5329, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5431, PETRI_PLACES=304, PETRI_TRANSITIONS=427} [2024-06-03 19:35:08,487 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-03 19:35:08,487 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 427 transitions, 5431 flow [2024-06-03 19:35:08,487 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 19:35:08,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:08,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:08,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 19:35:08,488 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:35:08,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:08,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2049063412, now seen corresponding path program 9 times [2024-06-03 19:35:08,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:08,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983854233] [2024-06-03 19:35:08,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:08,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:09,362 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 19:35:09,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:09,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983854233] [2024-06-03 19:35:09,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983854233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:09,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:09,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:09,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769008329] [2024-06-03 19:35:09,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:09,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:09,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:09,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:09,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:09,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:35:09,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 427 transitions, 5431 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 19:35:09,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:09,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:35:09,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:10,733 INFO L124 PetriNetUnfolderBase]: 3172/4867 cut-off events. [2024-06-03 19:35:10,733 INFO L125 PetriNetUnfolderBase]: For 874019/874027 co-relation queries the response was YES. [2024-06-03 19:35:10,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53478 conditions, 4867 events. 3172/4867 cut-off events. For 874019/874027 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 26672 event pairs, 612 based on Foata normal form. 4/4854 useless extension candidates. Maximal degree in co-relation 53327. Up to 4165 conditions per place. [2024-06-03 19:35:10,801 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 305 selfloop transitions, 138 changer transitions 0/447 dead transitions. [2024-06-03 19:35:10,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 447 transitions, 6783 flow [2024-06-03 19:35:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:10,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:10,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 19:35:10,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 19:35:10,802 INFO L175 Difference]: Start difference. First operand has 304 places, 427 transitions, 5431 flow. Second operand 8 states and 139 transitions. [2024-06-03 19:35:10,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 447 transitions, 6783 flow [2024-06-03 19:35:12,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 447 transitions, 6623 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-03 19:35:12,595 INFO L231 Difference]: Finished difference. Result has 306 places, 427 transitions, 5553 flow [2024-06-03 19:35:12,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5271, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5553, PETRI_PLACES=306, PETRI_TRANSITIONS=427} [2024-06-03 19:35:12,596 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-03 19:35:12,596 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 427 transitions, 5553 flow [2024-06-03 19:35:12,596 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 19:35:12,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:12,597 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 19:35:12,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 19:35:12,597 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 19:35:12,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:12,598 INFO L85 PathProgramCache]: Analyzing trace with hash -342569402, now seen corresponding path program 7 times [2024-06-03 19:35:12,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:12,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184061769] [2024-06-03 19:35:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:12,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:13,737 INFO 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 19:35:13,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:13,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184061769] [2024-06-03 19:35:13,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184061769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:13,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:13,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:13,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953978449] [2024-06-03 19:35:13,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:13,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:13,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:13,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:13,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:13,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:35:13,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 427 transitions, 5553 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 19:35:13,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:13,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:35:13,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:15,068 INFO L124 PetriNetUnfolderBase]: 3182/4898 cut-off events. [2024-06-03 19:35:15,068 INFO L125 PetriNetUnfolderBase]: For 891067/891081 co-relation queries the response was YES. [2024-06-03 19:35:15,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54112 conditions, 4898 events. 3182/4898 cut-off events. For 891067/891081 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 26989 event pairs, 638 based on Foata normal form. 8/4894 useless extension candidates. Maximal degree in co-relation 53960. Up to 4506 conditions per place. [2024-06-03 19:35:15,150 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 362 selfloop transitions, 77 changer transitions 0/443 dead transitions. [2024-06-03 19:35:15,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 443 transitions, 6747 flow [2024-06-03 19:35:15,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:15,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:15,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-03 19:35:15,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-03 19:35:15,152 INFO L175 Difference]: Start difference. First operand has 306 places, 427 transitions, 5553 flow. Second operand 8 states and 130 transitions. [2024-06-03 19:35:15,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 443 transitions, 6747 flow [2024-06-03 19:35:16,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 443 transitions, 6432 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-03 19:35:16,911 INFO L231 Difference]: Finished difference. Result has 308 places, 431 transitions, 5493 flow [2024-06-03 19:35:16,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5238, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5493, PETRI_PLACES=308, PETRI_TRANSITIONS=431} [2024-06-03 19:35:16,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-03 19:35:16,912 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 431 transitions, 5493 flow [2024-06-03 19:35:16,912 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 19:35:16,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:16,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:16,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 19:35:16,912 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 19:35:16,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:16,913 INFO L85 PathProgramCache]: Analyzing trace with hash -502049088, now seen corresponding path program 8 times [2024-06-03 19:35:16,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:16,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921306740] [2024-06-03 19:35:16,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:16,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:17,992 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 19:35:17,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:17,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921306740] [2024-06-03 19:35:17,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921306740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:17,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:17,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:17,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438740349] [2024-06-03 19:35:17,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:17,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:17,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:17,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:17,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:18,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:35:18,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 431 transitions, 5493 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 19:35:18,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:18,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:35:18,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:19,180 INFO L124 PetriNetUnfolderBase]: 3184/4897 cut-off events. [2024-06-03 19:35:19,181 INFO L125 PetriNetUnfolderBase]: For 903098/903112 co-relation queries the response was YES. [2024-06-03 19:35:19,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53887 conditions, 4897 events. 3184/4897 cut-off events. For 903098/903112 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 26968 event pairs, 632 based on Foata normal form. 8/4893 useless extension candidates. Maximal degree in co-relation 53734. Up to 4544 conditions per place. [2024-06-03 19:35:19,254 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 376 selfloop transitions, 65 changer transitions 0/445 dead transitions. [2024-06-03 19:35:19,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 445 transitions, 6487 flow [2024-06-03 19:35:19,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:19,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:19,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 19:35:19,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:35:19,256 INFO L175 Difference]: Start difference. First operand has 308 places, 431 transitions, 5493 flow. Second operand 8 states and 128 transitions. [2024-06-03 19:35:19,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 445 transitions, 6487 flow [2024-06-03 19:35:21,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 445 transitions, 6299 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-03 19:35:21,228 INFO L231 Difference]: Finished difference. Result has 311 places, 434 transitions, 5528 flow [2024-06-03 19:35:21,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5307, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5528, PETRI_PLACES=311, PETRI_TRANSITIONS=434} [2024-06-03 19:35:21,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-03 19:35:21,229 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 434 transitions, 5528 flow [2024-06-03 19:35:21,229 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 19:35:21,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:21,230 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 19:35:21,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 19:35:21,230 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 19:35:21,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:21,230 INFO L85 PathProgramCache]: Analyzing trace with hash 748391144, now seen corresponding path program 10 times [2024-06-03 19:35:21,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:21,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913963318] [2024-06-03 19:35:21,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:21,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:22,152 INFO 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 19:35:22,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:22,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913963318] [2024-06-03 19:35:22,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913963318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:22,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:22,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:22,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427816293] [2024-06-03 19:35:22,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:22,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:22,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:22,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:22,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:22,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:35:22,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 434 transitions, 5528 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 19:35:22,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:22,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:35:22,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:23,471 INFO L124 PetriNetUnfolderBase]: 3204/4927 cut-off events. [2024-06-03 19:35:23,472 INFO L125 PetriNetUnfolderBase]: For 932324/932335 co-relation queries the response was YES. [2024-06-03 19:35:23,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54405 conditions, 4927 events. 3204/4927 cut-off events. For 932324/932335 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 27173 event pairs, 683 based on Foata normal form. 6/4919 useless extension candidates. Maximal degree in co-relation 54251. Up to 4007 conditions per place. [2024-06-03 19:35:23,549 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 144 changer transitions 0/458 dead transitions. [2024-06-03 19:35:23,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 458 transitions, 7198 flow [2024-06-03 19:35:23,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:23,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:23,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 19:35:23,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-03 19:35:23,566 INFO L175 Difference]: Start difference. First operand has 311 places, 434 transitions, 5528 flow. Second operand 8 states and 137 transitions. [2024-06-03 19:35:23,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 458 transitions, 7198 flow [2024-06-03 19:35:25,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 458 transitions, 7011 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 19:35:25,682 INFO L231 Difference]: Finished difference. Result has 313 places, 441 transitions, 5894 flow [2024-06-03 19:35:25,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5341, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5894, PETRI_PLACES=313, PETRI_TRANSITIONS=441} [2024-06-03 19:35:25,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-03 19:35:25,683 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 441 transitions, 5894 flow [2024-06-03 19:35:25,683 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 19:35:25,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:25,683 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 19:35:25,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 19:35:25,683 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 19:35:25,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:25,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1153839710, now seen corresponding path program 9 times [2024-06-03 19:35:25,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:25,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42447833] [2024-06-03 19:35:25,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:25,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:26,783 INFO 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 19:35:26,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:26,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42447833] [2024-06-03 19:35:26,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42447833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:26,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:26,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:26,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210659723] [2024-06-03 19:35:26,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:26,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:26,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:26,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:26,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:26,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:35:26,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 441 transitions, 5894 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 19:35:26,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:26,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:35:26,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:28,034 INFO L124 PetriNetUnfolderBase]: 3217/4947 cut-off events. [2024-06-03 19:35:28,034 INFO L125 PetriNetUnfolderBase]: For 946412/946426 co-relation queries the response was YES. [2024-06-03 19:35:28,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55614 conditions, 4947 events. 3217/4947 cut-off events. For 946412/946426 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 27243 event pairs, 638 based on Foata normal form. 7/4942 useless extension candidates. Maximal degree in co-relation 55459. Up to 4454 conditions per place. [2024-06-03 19:35:28,119 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 329 selfloop transitions, 128 changer transitions 0/461 dead transitions. [2024-06-03 19:35:28,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 461 transitions, 7401 flow [2024-06-03 19:35:28,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:28,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:28,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 19:35:28,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-03 19:35:28,121 INFO L175 Difference]: Start difference. First operand has 313 places, 441 transitions, 5894 flow. Second operand 8 states and 131 transitions. [2024-06-03 19:35:28,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 461 transitions, 7401 flow [2024-06-03 19:35:30,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 461 transitions, 7001 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-03 19:35:30,216 INFO L231 Difference]: Finished difference. Result has 316 places, 448 transitions, 5919 flow [2024-06-03 19:35:30,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5494, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5919, PETRI_PLACES=316, PETRI_TRANSITIONS=448} [2024-06-03 19:35:30,217 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-03 19:35:30,217 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 448 transitions, 5919 flow [2024-06-03 19:35:30,217 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 19:35:30,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:30,217 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 19:35:30,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 19:35:30,218 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 19:35:30,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:30,218 INFO L85 PathProgramCache]: Analyzing trace with hash 925938560, now seen corresponding path program 10 times [2024-06-03 19:35:30,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:30,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827378845] [2024-06-03 19:35:30,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:30,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:31,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:31,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827378845] [2024-06-03 19:35:31,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827378845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:31,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:31,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:31,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752329572] [2024-06-03 19:35:31,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:31,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:31,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:31,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:31,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:31,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:35:31,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 448 transitions, 5919 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 19:35:31,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:31,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:35:31,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:32,688 INFO L124 PetriNetUnfolderBase]: 3214/4943 cut-off events. [2024-06-03 19:35:32,688 INFO L125 PetriNetUnfolderBase]: For 950618/950632 co-relation queries the response was YES. [2024-06-03 19:35:32,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54835 conditions, 4943 events. 3214/4943 cut-off events. For 950618/950632 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27268 event pairs, 634 based on Foata normal form. 7/4938 useless extension candidates. Maximal degree in co-relation 54679. Up to 4570 conditions per place. [2024-06-03 19:35:32,774 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 375 selfloop transitions, 81 changer transitions 0/460 dead transitions. [2024-06-03 19:35:32,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 460 transitions, 7065 flow [2024-06-03 19:35:32,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:32,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:32,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-03 19:35:32,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-03 19:35:32,776 INFO L175 Difference]: Start difference. First operand has 316 places, 448 transitions, 5919 flow. Second operand 8 states and 129 transitions. [2024-06-03 19:35:32,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 460 transitions, 7065 flow [2024-06-03 19:35:35,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 460 transitions, 6847 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-03 19:35:35,063 INFO L231 Difference]: Finished difference. Result has 320 places, 448 transitions, 5869 flow [2024-06-03 19:35:35,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5701, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5869, PETRI_PLACES=320, PETRI_TRANSITIONS=448} [2024-06-03 19:35:35,064 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-03 19:35:35,064 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 448 transitions, 5869 flow [2024-06-03 19:35:35,064 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 19:35:35,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:35,064 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 19:35:35,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 19:35:35,065 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 19:35:35,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:35,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1148125790, now seen corresponding path program 11 times [2024-06-03 19:35:35,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:35,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965626663] [2024-06-03 19:35:35,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:35,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:36,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:36,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965626663] [2024-06-03 19:35:36,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965626663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:36,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:36,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:36,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363579682] [2024-06-03 19:35:36,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:36,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:36,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:36,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:36,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:36,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:35:36,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 448 transitions, 5869 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 19:35:36,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:36,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:35:36,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:37,503 INFO L124 PetriNetUnfolderBase]: 3206/4931 cut-off events. [2024-06-03 19:35:37,503 INFO L125 PetriNetUnfolderBase]: For 962749/962763 co-relation queries the response was YES. [2024-06-03 19:35:37,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54591 conditions, 4931 events. 3206/4931 cut-off events. For 962749/962763 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27163 event pairs, 636 based on Foata normal form. 8/4927 useless extension candidates. Maximal degree in co-relation 54434. Up to 4444 conditions per place. [2024-06-03 19:35:37,591 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 336 selfloop transitions, 120 changer transitions 0/460 dead transitions. [2024-06-03 19:35:37,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 460 transitions, 7017 flow [2024-06-03 19:35:37,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:37,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:37,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 19:35:37,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-03 19:35:37,592 INFO L175 Difference]: Start difference. First operand has 320 places, 448 transitions, 5869 flow. Second operand 8 states and 131 transitions. [2024-06-03 19:35:37,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 460 transitions, 7017 flow [2024-06-03 19:35:39,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 460 transitions, 6651 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-03 19:35:39,834 INFO L231 Difference]: Finished difference. Result has 321 places, 448 transitions, 5751 flow [2024-06-03 19:35:39,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5503, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5751, PETRI_PLACES=321, PETRI_TRANSITIONS=448} [2024-06-03 19:35:39,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-03 19:35:39,834 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 448 transitions, 5751 flow [2024-06-03 19:35:39,835 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 19:35:39,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:39,835 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 19:35:39,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 19:35:39,835 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 19:35:39,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:39,836 INFO L85 PathProgramCache]: Analyzing trace with hash 925522664, now seen corresponding path program 11 times [2024-06-03 19:35:39,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:39,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673410178] [2024-06-03 19:35:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:39,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:40,815 INFO 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 19:35:40,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:40,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673410178] [2024-06-03 19:35:40,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673410178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:40,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:40,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:40,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191176604] [2024-06-03 19:35:40,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:40,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:40,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:40,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:40,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:40,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:35:40,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 448 transitions, 5751 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 19:35:40,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:40,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:35:40,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:42,133 INFO L124 PetriNetUnfolderBase]: 3216/4945 cut-off events. [2024-06-03 19:35:42,134 INFO L125 PetriNetUnfolderBase]: For 980727/980738 co-relation queries the response was YES. [2024-06-03 19:35:42,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54891 conditions, 4945 events. 3216/4945 cut-off events. For 980727/980738 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 27201 event pairs, 694 based on Foata normal form. 4/4935 useless extension candidates. Maximal degree in co-relation 54734. Up to 4016 conditions per place. [2024-06-03 19:35:42,219 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 315 selfloop transitions, 152 changer transitions 0/471 dead transitions. [2024-06-03 19:35:42,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 471 transitions, 7393 flow [2024-06-03 19:35:42,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:42,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:42,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 19:35:42,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-03 19:35:42,221 INFO L175 Difference]: Start difference. First operand has 321 places, 448 transitions, 5751 flow. Second operand 8 states and 137 transitions. [2024-06-03 19:35:42,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 471 transitions, 7393 flow [2024-06-03 19:35:44,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 471 transitions, 7139 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 19:35:44,869 INFO L231 Difference]: Finished difference. Result has 322 places, 454 transitions, 6029 flow [2024-06-03 19:35:44,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5497, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6029, PETRI_PLACES=322, PETRI_TRANSITIONS=454} [2024-06-03 19:35:44,870 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-03 19:35:44,870 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 454 transitions, 6029 flow [2024-06-03 19:35:44,870 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 19:35:44,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:44,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:44,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 19:35:44,870 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 19:35:44,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:44,871 INFO L85 PathProgramCache]: Analyzing trace with hash 925522850, now seen corresponding path program 12 times [2024-06-03 19:35:44,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:44,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561091153] [2024-06-03 19:35:44,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:44,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:46,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:46,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561091153] [2024-06-03 19:35:46,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561091153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:46,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:46,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:46,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841279662] [2024-06-03 19:35:46,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:46,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:46,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:46,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:46,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:46,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:35:46,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 454 transitions, 6029 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 19:35:46,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:46,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:35:46,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:47,450 INFO L124 PetriNetUnfolderBase]: 3211/4937 cut-off events. [2024-06-03 19:35:47,451 INFO L125 PetriNetUnfolderBase]: For 989994/990008 co-relation queries the response was YES. [2024-06-03 19:35:47,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55195 conditions, 4937 events. 3211/4937 cut-off events. For 989994/990008 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 27171 event pairs, 642 based on Foata normal form. 7/4932 useless extension candidates. Maximal degree in co-relation 55037. Up to 4585 conditions per place. [2024-06-03 19:35:47,542 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 393 selfloop transitions, 68 changer transitions 0/465 dead transitions. [2024-06-03 19:35:47,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 465 transitions, 6983 flow [2024-06-03 19:35:47,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:47,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:47,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-03 19:35:47,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 19:35:47,544 INFO L175 Difference]: Start difference. First operand has 322 places, 454 transitions, 6029 flow. Second operand 8 states and 126 transitions. [2024-06-03 19:35:47,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 465 transitions, 6983 flow [2024-06-03 19:35:50,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 465 transitions, 6702 flow, removed 94 selfloop flow, removed 3 redundant places. [2024-06-03 19:35:50,104 INFO L231 Difference]: Finished difference. Result has 327 places, 454 transitions, 5890 flow [2024-06-03 19:35:50,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5748, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5890, PETRI_PLACES=327, PETRI_TRANSITIONS=454} [2024-06-03 19:35:50,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-03 19:35:50,105 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 454 transitions, 5890 flow [2024-06-03 19:35:50,105 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 19:35:50,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:50,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:50,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 19:35:50,106 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 19:35:50,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:50,106 INFO L85 PathProgramCache]: Analyzing trace with hash 925529174, now seen corresponding path program 12 times [2024-06-03 19:35:50,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:50,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242062134] [2024-06-03 19:35:50,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:50,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:51,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:51,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242062134] [2024-06-03 19:35:51,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242062134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:51,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:51,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:51,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166752687] [2024-06-03 19:35:51,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:51,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:51,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:51,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:51,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:51,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:35:51,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 454 transitions, 5890 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 19:35:51,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:51,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:35:51,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:52,291 INFO L124 PetriNetUnfolderBase]: 3205/4931 cut-off events. [2024-06-03 19:35:52,291 INFO L125 PetriNetUnfolderBase]: For 993187/993198 co-relation queries the response was YES. [2024-06-03 19:35:52,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54732 conditions, 4931 events. 3205/4931 cut-off events. For 993187/993198 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 27138 event pairs, 694 based on Foata normal form. 4/4921 useless extension candidates. Maximal degree in co-relation 54572. Up to 4006 conditions per place. [2024-06-03 19:35:52,381 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 154 changer transitions 0/469 dead transitions. [2024-06-03 19:35:52,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 469 transitions, 7096 flow [2024-06-03 19:35:52,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:52,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:52,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 19:35:52,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-03 19:35:52,383 INFO L175 Difference]: Start difference. First operand has 327 places, 454 transitions, 5890 flow. Second operand 8 states and 135 transitions. [2024-06-03 19:35:52,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 469 transitions, 7096 flow [2024-06-03 19:35:54,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 469 transitions, 6836 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-03 19:35:54,818 INFO L231 Difference]: Finished difference. Result has 327 places, 454 transitions, 5944 flow [2024-06-03 19:35:54,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5630, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5944, PETRI_PLACES=327, PETRI_TRANSITIONS=454} [2024-06-03 19:35:54,819 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-03 19:35:54,819 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 454 transitions, 5944 flow [2024-06-03 19:35:54,819 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 19:35:54,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:54,820 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 19:35:54,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 19:35:54,820 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 19:35:54,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:54,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1229025098, now seen corresponding path program 4 times [2024-06-03 19:35:54,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:54,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693239481] [2024-06-03 19:35:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:54,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:55,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:55,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693239481] [2024-06-03 19:35:55,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693239481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:55,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:55,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:55,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224846001] [2024-06-03 19:35:55,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:55,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:55,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:55,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:55,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:55,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:35:55,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 454 transitions, 5944 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 19:35:55,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:55,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:35:55,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:57,002 INFO L124 PetriNetUnfolderBase]: 3208/4934 cut-off events. [2024-06-03 19:35:57,002 INFO L125 PetriNetUnfolderBase]: For 1012496/1012510 co-relation queries the response was YES. [2024-06-03 19:35:57,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54955 conditions, 4934 events. 3208/4934 cut-off events. For 1012496/1012510 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 27193 event pairs, 640 based on Foata normal form. 10/4932 useless extension candidates. Maximal degree in co-relation 54794. Up to 4573 conditions per place. [2024-06-03 19:35:57,084 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 399 selfloop transitions, 66 changer transitions 0/469 dead transitions. [2024-06-03 19:35:57,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 469 transitions, 7050 flow [2024-06-03 19:35:57,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:57,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:57,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 19:35:57,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:35:57,086 INFO L175 Difference]: Start difference. First operand has 327 places, 454 transitions, 5944 flow. Second operand 8 states and 128 transitions. [2024-06-03 19:35:57,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 469 transitions, 7050 flow [2024-06-03 19:35:59,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 469 transitions, 6734 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:35:59,824 INFO L231 Difference]: Finished difference. Result has 328 places, 457 transitions, 5914 flow [2024-06-03 19:35:59,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5628, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5914, PETRI_PLACES=328, PETRI_TRANSITIONS=457} [2024-06-03 19:35:59,825 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-03 19:35:59,825 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 457 transitions, 5914 flow [2024-06-03 19:35:59,825 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 19:35:59,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:59,825 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 19:35:59,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 19:35:59,826 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 19:35:59,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:59,826 INFO L85 PathProgramCache]: Analyzing trace with hash 56924312, now seen corresponding path program 5 times [2024-06-03 19:35:59,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:59,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458648638] [2024-06-03 19:35:59,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:59,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:01,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:01,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458648638] [2024-06-03 19:36:01,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458648638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:01,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:01,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:01,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131580201] [2024-06-03 19:36:01,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:01,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:01,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:01,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:01,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:01,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:36:01,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 457 transitions, 5914 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:01,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:01,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:36:01,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:02,649 INFO L124 PetriNetUnfolderBase]: 3250/4991 cut-off events. [2024-06-03 19:36:02,650 INFO L125 PetriNetUnfolderBase]: For 1048732/1048746 co-relation queries the response was YES. [2024-06-03 19:36:02,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56272 conditions, 4991 events. 3250/4991 cut-off events. For 1048732/1048746 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 27540 event pairs, 623 based on Foata normal form. 8/4987 useless extension candidates. Maximal degree in co-relation 56110. Up to 4347 conditions per place. [2024-06-03 19:36:02,738 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 370 selfloop transitions, 137 changer transitions 0/511 dead transitions. [2024-06-03 19:36:02,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 511 transitions, 8561 flow [2024-06-03 19:36:02,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:36:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:36:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-03 19:36:02,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-03 19:36:02,739 INFO L175 Difference]: Start difference. First operand has 328 places, 457 transitions, 5914 flow. Second operand 9 states and 149 transitions. [2024-06-03 19:36:02,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 511 transitions, 8561 flow [2024-06-03 19:36:04,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 511 transitions, 8297 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-03 19:36:04,988 INFO L231 Difference]: Finished difference. Result has 334 places, 487 transitions, 6822 flow [2024-06-03 19:36:04,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5650, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6822, PETRI_PLACES=334, PETRI_TRANSITIONS=487} [2024-06-03 19:36:04,988 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-03 19:36:04,988 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 487 transitions, 6822 flow [2024-06-03 19:36:04,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:04,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:04,989 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 19:36:04,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 19:36:04,989 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 19:36:04,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:04,990 INFO L85 PathProgramCache]: Analyzing trace with hash 748278924, now seen corresponding path program 6 times [2024-06-03 19:36:04,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:04,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124425861] [2024-06-03 19:36:04,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:04,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:06,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:06,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124425861] [2024-06-03 19:36:06,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124425861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:06,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:06,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:06,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475910515] [2024-06-03 19:36:06,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:06,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:06,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:06,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:06,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:06,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:36:06,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 487 transitions, 6822 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:06,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:06,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:36:06,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:07,537 INFO L124 PetriNetUnfolderBase]: 3260/5010 cut-off events. [2024-06-03 19:36:07,537 INFO L125 PetriNetUnfolderBase]: For 1071061/1071075 co-relation queries the response was YES. [2024-06-03 19:36:07,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57402 conditions, 5010 events. 3260/5010 cut-off events. For 1071061/1071075 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 27671 event pairs, 638 based on Foata normal form. 8/5006 useless extension candidates. Maximal degree in co-relation 57236. Up to 4645 conditions per place. [2024-06-03 19:36:07,626 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 428 selfloop transitions, 71 changer transitions 0/503 dead transitions. [2024-06-03 19:36:07,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 503 transitions, 8027 flow [2024-06-03 19:36:07,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:36:07,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:36:07,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-03 19:36:07,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-03 19:36:07,628 INFO L175 Difference]: Start difference. First operand has 334 places, 487 transitions, 6822 flow. Second operand 9 states and 141 transitions. [2024-06-03 19:36:07,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 503 transitions, 8027 flow [2024-06-03 19:36:10,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 503 transitions, 7702 flow, removed 129 selfloop flow, removed 3 redundant places. [2024-06-03 19:36:10,141 INFO L231 Difference]: Finished difference. Result has 340 places, 491 transitions, 6827 flow [2024-06-03 19:36:10,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6511, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6827, PETRI_PLACES=340, PETRI_TRANSITIONS=491} [2024-06-03 19:36:10,142 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-03 19:36:10,142 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 491 transitions, 6827 flow [2024-06-03 19:36:10,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:10,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:10,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:10,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 19:36:10,142 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 19:36:10,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:10,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1148134284, now seen corresponding path program 7 times [2024-06-03 19:36:10,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:10,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752911964] [2024-06-03 19:36:10,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:10,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:11,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:11,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752911964] [2024-06-03 19:36:11,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752911964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:11,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:11,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:11,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391549164] [2024-06-03 19:36:11,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:11,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:11,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:11,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:11,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:11,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:36:11,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 491 transitions, 6827 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:11,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:11,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:36:11,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:12,770 INFO L124 PetriNetUnfolderBase]: 3288/5051 cut-off events. [2024-06-03 19:36:12,771 INFO L125 PetriNetUnfolderBase]: For 1096226/1096240 co-relation queries the response was YES. [2024-06-03 19:36:12,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58192 conditions, 5051 events. 3288/5051 cut-off events. For 1096226/1096240 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 27944 event pairs, 627 based on Foata normal form. 8/5047 useless extension candidates. Maximal degree in co-relation 58024. Up to 4385 conditions per place. [2024-06-03 19:36:12,851 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 376 selfloop transitions, 143 changer transitions 0/523 dead transitions. [2024-06-03 19:36:12,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 523 transitions, 9042 flow [2024-06-03 19:36:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:36:12,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:36:12,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-03 19:36:12,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-03 19:36:12,852 INFO L175 Difference]: Start difference. First operand has 340 places, 491 transitions, 6827 flow. Second operand 9 states and 149 transitions. [2024-06-03 19:36:12,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 523 transitions, 9042 flow [2024-06-03 19:36:15,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 523 transitions, 8763 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-03 19:36:15,489 INFO L231 Difference]: Finished difference. Result has 343 places, 499 transitions, 7125 flow [2024-06-03 19:36:15,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6548, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7125, PETRI_PLACES=343, PETRI_TRANSITIONS=499} [2024-06-03 19:36:15,490 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-03 19:36:15,490 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 499 transitions, 7125 flow [2024-06-03 19:36:15,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:15,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:15,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:15,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 19:36:15,491 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 19:36:15,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:15,492 INFO L85 PathProgramCache]: Analyzing trace with hash -342560908, now seen corresponding path program 8 times [2024-06-03 19:36:15,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:15,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105618425] [2024-06-03 19:36:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:15,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:16,737 INFO 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 19:36:16,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:16,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105618425] [2024-06-03 19:36:16,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105618425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:16,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:16,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:16,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138586868] [2024-06-03 19:36:16,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:16,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:16,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:16,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:16,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:16,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:36:16,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 499 transitions, 7125 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:16,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:16,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:36:16,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:18,184 INFO L124 PetriNetUnfolderBase]: 3300/5072 cut-off events. [2024-06-03 19:36:18,184 INFO L125 PetriNetUnfolderBase]: For 1116104/1116118 co-relation queries the response was YES. [2024-06-03 19:36:18,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58826 conditions, 5072 events. 3300/5072 cut-off events. For 1116104/1116118 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 28094 event pairs, 637 based on Foata normal form. 8/5068 useless extension candidates. Maximal degree in co-relation 58656. Up to 4625 conditions per place. [2024-06-03 19:36:18,265 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 430 selfloop transitions, 87 changer transitions 0/521 dead transitions. [2024-06-03 19:36:18,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 521 transitions, 8755 flow [2024-06-03 19:36:18,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:36:18,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:36:18,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-03 19:36:18,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:36:18,266 INFO L175 Difference]: Start difference. First operand has 343 places, 499 transitions, 7125 flow. Second operand 9 states and 144 transitions. [2024-06-03 19:36:18,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 521 transitions, 8755 flow [2024-06-03 19:36:20,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 521 transitions, 8380 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-03 19:36:20,740 INFO L231 Difference]: Finished difference. Result has 348 places, 506 transitions, 7215 flow [2024-06-03 19:36:20,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6758, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7215, PETRI_PLACES=348, PETRI_TRANSITIONS=506} [2024-06-03 19:36:20,741 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-03 19:36:20,741 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 506 transitions, 7215 flow [2024-06-03 19:36:20,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:20,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:20,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:20,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 19:36:20,742 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 19:36:20,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:20,742 INFO L85 PathProgramCache]: Analyzing trace with hash 71221636, now seen corresponding path program 2 times [2024-06-03 19:36:20,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:20,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772462722] [2024-06-03 19:36:20,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:20,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:22,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:22,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772462722] [2024-06-03 19:36:22,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772462722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:22,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:22,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:22,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624606862] [2024-06-03 19:36:22,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:22,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:22,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:22,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:22,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:22,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:36:22,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 506 transitions, 7215 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:22,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:22,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:36:22,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:23,724 INFO L124 PetriNetUnfolderBase]: 3305/5081 cut-off events. [2024-06-03 19:36:23,724 INFO L125 PetriNetUnfolderBase]: For 1135381/1135385 co-relation queries the response was YES. [2024-06-03 19:36:23,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58923 conditions, 5081 events. 3305/5081 cut-off events. For 1135381/1135385 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 28133 event pairs, 657 based on Foata normal form. 2/5081 useless extension candidates. Maximal degree in co-relation 58751. Up to 4919 conditions per place. [2024-06-03 19:36:23,817 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 492 selfloop transitions, 26 changer transitions 0/522 dead transitions. [2024-06-03 19:36:23,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 522 transitions, 8577 flow [2024-06-03 19:36:23,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:36:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:36:23,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 144 transitions. [2024-06-03 19:36:23,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34285714285714286 [2024-06-03 19:36:23,818 INFO L175 Difference]: Start difference. First operand has 348 places, 506 transitions, 7215 flow. Second operand 10 states and 144 transitions. [2024-06-03 19:36:23,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 522 transitions, 8577 flow [2024-06-03 19:36:26,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 522 transitions, 8306 flow, removed 88 selfloop flow, removed 5 redundant places. [2024-06-03 19:36:26,539 INFO L231 Difference]: Finished difference. Result has 353 places, 509 transitions, 7076 flow [2024-06-03 19:36:26,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6944, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7076, PETRI_PLACES=353, PETRI_TRANSITIONS=509} [2024-06-03 19:36:26,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-03 19:36:26,540 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 509 transitions, 7076 flow [2024-06-03 19:36:26,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:26,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:26,540 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 19:36:26,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 19:36:26,541 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 19:36:26,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:26,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1161943854, now seen corresponding path program 9 times [2024-06-03 19:36:26,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:26,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614393834] [2024-06-03 19:36:26,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:26,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:28,024 INFO 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 19:36:28,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:28,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614393834] [2024-06-03 19:36:28,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614393834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:28,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:28,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:28,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823012650] [2024-06-03 19:36:28,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:28,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:28,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:28,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:28,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:28,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:36:28,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 509 transitions, 7076 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:28,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:28,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:36:28,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:29,421 INFO L124 PetriNetUnfolderBase]: 3301/5078 cut-off events. [2024-06-03 19:36:29,421 INFO L125 PetriNetUnfolderBase]: For 1143589/1143599 co-relation queries the response was YES. [2024-06-03 19:36:29,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58543 conditions, 5078 events. 3301/5078 cut-off events. For 1143589/1143599 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 28137 event pairs, 657 based on Foata normal form. 7/5082 useless extension candidates. Maximal degree in co-relation 58369. Up to 4868 conditions per place. [2024-06-03 19:36:29,512 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 473 selfloop transitions, 45 changer transitions 0/522 dead transitions. [2024-06-03 19:36:29,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 522 transitions, 8393 flow [2024-06-03 19:36:29,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:36:29,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:36:29,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-03 19:36:29,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-03 19:36:29,513 INFO L175 Difference]: Start difference. First operand has 353 places, 509 transitions, 7076 flow. Second operand 9 states and 138 transitions. [2024-06-03 19:36:29,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 522 transitions, 8393 flow [2024-06-03 19:36:32,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 522 transitions, 8171 flow, removed 91 selfloop flow, removed 7 redundant places. [2024-06-03 19:36:32,344 INFO L231 Difference]: Finished difference. Result has 356 places, 510 transitions, 6996 flow [2024-06-03 19:36:32,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6854, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6996, PETRI_PLACES=356, PETRI_TRANSITIONS=510} [2024-06-03 19:36:32,344 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-03 19:36:32,344 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 510 transitions, 6996 flow [2024-06-03 19:36:32,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:32,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:32,354 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 19:36:32,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 19:36:32,354 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 19:36:32,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:32,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1241416604, now seen corresponding path program 3 times [2024-06-03 19:36:32,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:32,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57487529] [2024-06-03 19:36:32,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:32,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:34,210 INFO 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 19:36:34,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:34,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57487529] [2024-06-03 19:36:34,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57487529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:34,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:34,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:34,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297359787] [2024-06-03 19:36:34,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:34,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:34,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:34,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:34,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:34,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:36:34,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 510 transitions, 6996 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:34,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:34,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:36:34,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:35,622 INFO L124 PetriNetUnfolderBase]: 3298/5071 cut-off events. [2024-06-03 19:36:35,622 INFO L125 PetriNetUnfolderBase]: For 1155107/1155111 co-relation queries the response was YES. [2024-06-03 19:36:35,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58438 conditions, 5071 events. 3298/5071 cut-off events. For 1155107/1155111 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 28054 event pairs, 653 based on Foata normal form. 2/5071 useless extension candidates. Maximal degree in co-relation 58262. Up to 4917 conditions per place. [2024-06-03 19:36:35,702 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 497 selfloop transitions, 20 changer transitions 0/521 dead transitions. [2024-06-03 19:36:35,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 521 transitions, 8058 flow [2024-06-03 19:36:35,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:36:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:36:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-03 19:36:35,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439153439153439 [2024-06-03 19:36:35,704 INFO L175 Difference]: Start difference. First operand has 356 places, 510 transitions, 6996 flow. Second operand 9 states and 130 transitions. [2024-06-03 19:36:35,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 521 transitions, 8058 flow [2024-06-03 19:36:38,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 521 transitions, 7581 flow, removed 61 selfloop flow, removed 12 redundant places. [2024-06-03 19:36:38,491 INFO L231 Difference]: Finished difference. Result has 353 places, 510 transitions, 6565 flow [2024-06-03 19:36:38,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6519, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6565, PETRI_PLACES=353, PETRI_TRANSITIONS=510} [2024-06-03 19:36:38,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-03 19:36:38,492 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 510 transitions, 6565 flow [2024-06-03 19:36:38,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:38,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:38,493 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 19:36:38,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 19:36:38,493 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 19:36:38,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:38,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1229381970, now seen corresponding path program 10 times [2024-06-03 19:36:38,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:38,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552524875] [2024-06-03 19:36:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:38,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:39,571 INFO 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 19:36:39,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:39,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552524875] [2024-06-03 19:36:39,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552524875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:39,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:39,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:39,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517871670] [2024-06-03 19:36:39,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:39,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:39,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:39,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:39,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:39,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:36:39,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 510 transitions, 6565 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:39,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:39,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:36:39,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:40,823 INFO L124 PetriNetUnfolderBase]: 3350/5148 cut-off events. [2024-06-03 19:36:40,823 INFO L125 PetriNetUnfolderBase]: For 1217791/1217805 co-relation queries the response was YES. [2024-06-03 19:36:40,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59335 conditions, 5148 events. 3350/5148 cut-off events. For 1217791/1217805 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 28571 event pairs, 635 based on Foata normal form. 10/5146 useless extension candidates. Maximal degree in co-relation 59163. Up to 4647 conditions per place. [2024-06-03 19:36:40,908 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 436 selfloop transitions, 100 changer transitions 0/540 dead transitions. [2024-06-03 19:36:40,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 540 transitions, 8773 flow [2024-06-03 19:36:40,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:36:40,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:36:40,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-03 19:36:40,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-03 19:36:40,910 INFO L175 Difference]: Start difference. First operand has 353 places, 510 transitions, 6565 flow. Second operand 9 states and 149 transitions. [2024-06-03 19:36:40,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 540 transitions, 8773 flow [2024-06-03 19:36:43,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 540 transitions, 8715 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-03 19:36:43,989 INFO L231 Difference]: Finished difference. Result has 355 places, 524 transitions, 7324 flow [2024-06-03 19:36:43,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6507, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7324, PETRI_PLACES=355, PETRI_TRANSITIONS=524} [2024-06-03 19:36:43,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-03 19:36:43,989 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 524 transitions, 7324 flow [2024-06-03 19:36:43,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:43,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:43,990 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 19:36:43,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 19:36:43,990 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 19:36:43,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:43,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1872926794, now seen corresponding path program 1 times [2024-06-03 19:36:43,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:43,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157326223] [2024-06-03 19:36:43,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:43,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:45,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:45,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157326223] [2024-06-03 19:36:45,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157326223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:45,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:45,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:45,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022497006] [2024-06-03 19:36:45,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:45,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:45,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:45,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:45,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:45,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:36:45,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 524 transitions, 7324 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:45,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:45,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:36:45,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:46,340 INFO L124 PetriNetUnfolderBase]: 3213/5013 cut-off events. [2024-06-03 19:36:46,340 INFO L125 PetriNetUnfolderBase]: For 1244726/1244730 co-relation queries the response was YES. [2024-06-03 19:36:46,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59727 conditions, 5013 events. 3213/5013 cut-off events. For 1244726/1244730 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 28497 event pairs, 587 based on Foata normal form. 3/5010 useless extension candidates. Maximal degree in co-relation 59552. Up to 4653 conditions per place. [2024-06-03 19:36:46,422 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 500 selfloop transitions, 17 changer transitions 0/547 dead transitions. [2024-06-03 19:36:46,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 547 transitions, 8496 flow [2024-06-03 19:36:46,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:36:46,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:36:46,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 19:36:46,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-03 19:36:46,427 INFO L175 Difference]: Start difference. First operand has 355 places, 524 transitions, 7324 flow. Second operand 8 states and 135 transitions. [2024-06-03 19:36:46,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 547 transitions, 8496 flow [2024-06-03 19:36:49,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 547 transitions, 8153 flow, removed 135 selfloop flow, removed 4 redundant places. [2024-06-03 19:36:49,544 INFO L231 Difference]: Finished difference. Result has 359 places, 526 transitions, 7102 flow [2024-06-03 19:36:49,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6981, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7102, PETRI_PLACES=359, PETRI_TRANSITIONS=526} [2024-06-03 19:36:49,544 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-03 19:36:49,544 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 526 transitions, 7102 flow [2024-06-03 19:36:49,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:49,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:49,545 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 19:36:49,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 19:36:49,545 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 19:36:49,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:49,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1291784424, now seen corresponding path program 1 times [2024-06-03 19:36:49,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:49,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412968861] [2024-06-03 19:36:49,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:49,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:50,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:50,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412968861] [2024-06-03 19:36:50,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412968861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:50,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:50,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:50,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119228630] [2024-06-03 19:36:50,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:50,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:50,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:50,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:50,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:50,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:36:50,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 526 transitions, 7102 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:50,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:50,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:36:50,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:51,916 INFO L124 PetriNetUnfolderBase]: 3208/5006 cut-off events. [2024-06-03 19:36:51,917 INFO L125 PetriNetUnfolderBase]: For 1241318/1241322 co-relation queries the response was YES. [2024-06-03 19:36:51,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59134 conditions, 5006 events. 3208/5006 cut-off events. For 1241318/1241322 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 28452 event pairs, 616 based on Foata normal form. 3/5003 useless extension candidates. Maximal degree in co-relation 58957. Up to 4653 conditions per place. [2024-06-03 19:36:51,999 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 492 selfloop transitions, 25 changer transitions 0/547 dead transitions. [2024-06-03 19:36:52,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 547 transitions, 8276 flow [2024-06-03 19:36:52,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:36:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:36:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 19:36:52,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-03 19:36:52,001 INFO L175 Difference]: Start difference. First operand has 359 places, 526 transitions, 7102 flow. Second operand 8 states and 134 transitions. [2024-06-03 19:36:52,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 547 transitions, 8276 flow [2024-06-03 19:36:55,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 547 transitions, 8169 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-03 19:36:55,509 INFO L231 Difference]: Finished difference. Result has 361 places, 529 transitions, 7135 flow [2024-06-03 19:36:55,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6995, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7135, PETRI_PLACES=361, PETRI_TRANSITIONS=529} [2024-06-03 19:36:55,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-03 19:36:55,510 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 529 transitions, 7135 flow [2024-06-03 19:36:55,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:55,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:55,510 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 19:36:55,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 19:36:55,510 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 19:36:55,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:55,511 INFO L85 PathProgramCache]: Analyzing trace with hash -776419730, now seen corresponding path program 2 times [2024-06-03 19:36:55,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:55,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859903337] [2024-06-03 19:36:55,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:55,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:56,524 INFO 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 19:36:56,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:56,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859903337] [2024-06-03 19:36:56,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859903337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:56,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:56,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:56,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042454933] [2024-06-03 19:36:56,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:56,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:56,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:56,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:56,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:56,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:36:56,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 529 transitions, 7135 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:56,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:56,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:36:56,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:57,796 INFO L124 PetriNetUnfolderBase]: 3216/5016 cut-off events. [2024-06-03 19:36:57,797 INFO L125 PetriNetUnfolderBase]: For 1262590/1262594 co-relation queries the response was YES. [2024-06-03 19:36:57,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59432 conditions, 5016 events. 3216/5016 cut-off events. For 1262590/1262594 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 28516 event pairs, 616 based on Foata normal form. 3/5011 useless extension candidates. Maximal degree in co-relation 59254. Up to 4668 conditions per place. [2024-06-03 19:36:57,875 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 498 selfloop transitions, 21 changer transitions 0/549 dead transitions. [2024-06-03 19:36:57,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 549 transitions, 8313 flow [2024-06-03 19:36:57,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:36:57,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:36:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 19:36:57,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-03 19:36:57,876 INFO L175 Difference]: Start difference. First operand has 361 places, 529 transitions, 7135 flow. Second operand 8 states and 133 transitions. [2024-06-03 19:36:57,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 549 transitions, 8313 flow [2024-06-03 19:37:01,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 549 transitions, 8215 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-03 19:37:01,121 INFO L231 Difference]: Finished difference. Result has 363 places, 531 transitions, 7171 flow [2024-06-03 19:37:01,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7037, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7171, PETRI_PLACES=363, PETRI_TRANSITIONS=531} [2024-06-03 19:37:01,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-03 19:37:01,122 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 531 transitions, 7171 flow [2024-06-03 19:37:01,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:01,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:01,123 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 19:37:01,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 19:37:01,124 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 19:37:01,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:01,124 INFO L85 PathProgramCache]: Analyzing trace with hash -661013240, now seen corresponding path program 3 times [2024-06-03 19:37:01,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:01,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899171254] [2024-06-03 19:37:01,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:01,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:02,279 INFO 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 19:37:02,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:02,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899171254] [2024-06-03 19:37:02,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899171254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:02,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:02,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:37:02,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481601316] [2024-06-03 19:37:02,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:02,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:37:02,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:02,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:37:02,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:37:02,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:37:02,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 531 transitions, 7171 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:02,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:02,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:37:02,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:03,792 INFO L124 PetriNetUnfolderBase]: 3224/5035 cut-off events. [2024-06-03 19:37:03,792 INFO L125 PetriNetUnfolderBase]: For 1285143/1285147 co-relation queries the response was YES. [2024-06-03 19:37:03,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59847 conditions, 5035 events. 3224/5035 cut-off events. For 1285143/1285147 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 28658 event pairs, 599 based on Foata normal form. 3/5028 useless extension candidates. Maximal degree in co-relation 59668. Up to 4673 conditions per place. [2024-06-03 19:37:03,871 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 493 selfloop transitions, 26 changer transitions 0/549 dead transitions. [2024-06-03 19:37:03,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 549 transitions, 8353 flow [2024-06-03 19:37:03,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:37:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:37:03,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 19:37:03,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-03 19:37:03,872 INFO L175 Difference]: Start difference. First operand has 363 places, 531 transitions, 7171 flow. Second operand 8 states and 133 transitions. [2024-06-03 19:37:03,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 549 transitions, 8353 flow [2024-06-03 19:37:07,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 549 transitions, 8237 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-03 19:37:07,117 INFO L231 Difference]: Finished difference. Result has 365 places, 533 transitions, 7202 flow [2024-06-03 19:37:07,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7055, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7202, PETRI_PLACES=365, PETRI_TRANSITIONS=533} [2024-06-03 19:37:07,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-03 19:37:07,117 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 533 transitions, 7202 flow [2024-06-03 19:37:07,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:07,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:07,118 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 19:37:07,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 19:37:07,118 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 19:37:07,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:07,119 INFO L85 PathProgramCache]: Analyzing trace with hash -165429140, now seen corresponding path program 4 times [2024-06-03 19:37:07,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:07,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803858609] [2024-06-03 19:37:07,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:07,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:08,239 INFO 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 19:37:08,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:08,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803858609] [2024-06-03 19:37:08,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803858609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:08,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:08,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:37:08,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795364220] [2024-06-03 19:37:08,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:08,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:37:08,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:08,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:37:08,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:37:08,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:37:08,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 533 transitions, 7202 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:08,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:08,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:37:08,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:09,617 INFO L124 PetriNetUnfolderBase]: 3219/5019 cut-off events. [2024-06-03 19:37:09,617 INFO L125 PetriNetUnfolderBase]: For 1290856/1290863 co-relation queries the response was YES. [2024-06-03 19:37:09,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59639 conditions, 5019 events. 3219/5019 cut-off events. For 1290856/1290863 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 28520 event pairs, 619 based on Foata normal form. 3/5008 useless extension candidates. Maximal degree in co-relation 59459. Up to 4654 conditions per place. [2024-06-03 19:37:09,699 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 485 selfloop transitions, 33 changer transitions 0/548 dead transitions. [2024-06-03 19:37:09,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 548 transitions, 8376 flow [2024-06-03 19:37:09,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:37:09,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:37:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 19:37:09,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-03 19:37:09,701 INFO L175 Difference]: Start difference. First operand has 365 places, 533 transitions, 7202 flow. Second operand 8 states and 132 transitions. [2024-06-03 19:37:09,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 548 transitions, 8376 flow [2024-06-03 19:37:13,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 548 transitions, 8245 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-03 19:37:13,494 INFO L231 Difference]: Finished difference. Result has 367 places, 535 transitions, 7236 flow [2024-06-03 19:37:13,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7071, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7236, PETRI_PLACES=367, PETRI_TRANSITIONS=535} [2024-06-03 19:37:13,494 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-03 19:37:13,494 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 535 transitions, 7236 flow [2024-06-03 19:37:13,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:13,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:13,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:13,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 19:37:13,495 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 19:37:13,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:13,496 INFO L85 PathProgramCache]: Analyzing trace with hash 569229090, now seen corresponding path program 1 times [2024-06-03 19:37:13,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:13,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230980038] [2024-06-03 19:37:13,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:13,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:14,417 INFO 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 19:37:14,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:14,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230980038] [2024-06-03 19:37:14,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230980038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:14,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:14,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:37:14,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777568469] [2024-06-03 19:37:14,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:14,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:37:14,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:14,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:37:14,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:37:14,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:37:14,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 535 transitions, 7236 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:14,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:14,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:37:14,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:15,849 INFO L124 PetriNetUnfolderBase]: 3379/5208 cut-off events. [2024-06-03 19:37:15,849 INFO L125 PetriNetUnfolderBase]: For 1313994/1314006 co-relation queries the response was YES. [2024-06-03 19:37:15,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61023 conditions, 5208 events. 3379/5208 cut-off events. For 1313994/1314006 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 28965 event pairs, 469 based on Foata normal form. 14/5219 useless extension candidates. Maximal degree in co-relation 60842. Up to 4823 conditions per place. [2024-06-03 19:37:15,934 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 523 selfloop transitions, 41 changer transitions 0/568 dead transitions. [2024-06-03 19:37:15,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 568 transitions, 8599 flow [2024-06-03 19:37:15,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:37:15,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:37:15,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 19:37:15,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-03 19:37:15,936 INFO L175 Difference]: Start difference. First operand has 367 places, 535 transitions, 7236 flow. Second operand 9 states and 152 transitions. [2024-06-03 19:37:15,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 568 transitions, 8599 flow [2024-06-03 19:37:19,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 568 transitions, 8450 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-03 19:37:19,814 INFO L231 Difference]: Finished difference. Result has 370 places, 538 transitions, 7319 flow [2024-06-03 19:37:19,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7087, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7319, PETRI_PLACES=370, PETRI_TRANSITIONS=538} [2024-06-03 19:37:19,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-03 19:37:19,815 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 538 transitions, 7319 flow [2024-06-03 19:37:19,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:19,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:19,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:19,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 19:37:19,816 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 19:37:19,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:19,816 INFO L85 PathProgramCache]: Analyzing trace with hash 901470120, now seen corresponding path program 2 times [2024-06-03 19:37:19,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:19,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625407956] [2024-06-03 19:37:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:19,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:20,866 INFO 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 19:37:20,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:20,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625407956] [2024-06-03 19:37:20,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625407956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:20,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:20,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:37:20,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287027541] [2024-06-03 19:37:20,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:20,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:37:20,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:20,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:37:20,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:37:20,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:37:20,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 538 transitions, 7319 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:20,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:20,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:37:20,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:22,452 INFO L124 PetriNetUnfolderBase]: 3395/5224 cut-off events. [2024-06-03 19:37:22,452 INFO L125 PetriNetUnfolderBase]: For 1337593/1337605 co-relation queries the response was YES. [2024-06-03 19:37:22,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61732 conditions, 5224 events. 3395/5224 cut-off events. For 1337593/1337605 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 29089 event pairs, 599 based on Foata normal form. 14/5235 useless extension candidates. Maximal degree in co-relation 61550. Up to 4900 conditions per place. [2024-06-03 19:37:22,563 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 521 selfloop transitions, 42 changer transitions 0/567 dead transitions. [2024-06-03 19:37:22,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 567 transitions, 8674 flow [2024-06-03 19:37:22,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:37:22,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:37:22,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-03 19:37:22,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-03 19:37:22,565 INFO L175 Difference]: Start difference. First operand has 370 places, 538 transitions, 7319 flow. Second operand 9 states and 149 transitions. [2024-06-03 19:37:22,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 567 transitions, 8674 flow [2024-06-03 19:37:26,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 567 transitions, 8464 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-03 19:37:26,195 INFO L231 Difference]: Finished difference. Result has 372 places, 541 transitions, 7349 flow [2024-06-03 19:37:26,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7109, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7349, PETRI_PLACES=372, PETRI_TRANSITIONS=541} [2024-06-03 19:37:26,195 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-03 19:37:26,195 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 541 transitions, 7349 flow [2024-06-03 19:37:26,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:26,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:26,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:26,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 19:37:26,196 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 19:37:26,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:26,197 INFO L85 PathProgramCache]: Analyzing trace with hash 835252800, now seen corresponding path program 3 times [2024-06-03 19:37:26,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:26,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082305119] [2024-06-03 19:37:26,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:26,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:27,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:27,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082305119] [2024-06-03 19:37:27,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082305119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:27,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:27,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:37:27,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125809001] [2024-06-03 19:37:27,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:27,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:37:27,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:27,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:37:27,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:37:27,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:37:27,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 541 transitions, 7349 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:27,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:27,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:37:27,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:28,806 INFO L124 PetriNetUnfolderBase]: 3411/5248 cut-off events. [2024-06-03 19:37:28,806 INFO L125 PetriNetUnfolderBase]: For 1361163/1361175 co-relation queries the response was YES. [2024-06-03 19:37:28,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62199 conditions, 5248 events. 3411/5248 cut-off events. For 1361163/1361175 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 29285 event pairs, 603 based on Foata normal form. 14/5259 useless extension candidates. Maximal degree in co-relation 62016. Up to 4934 conditions per place. [2024-06-03 19:37:28,885 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 522 selfloop transitions, 43 changer transitions 0/569 dead transitions. [2024-06-03 19:37:28,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 569 transitions, 8712 flow [2024-06-03 19:37:28,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:37:28,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:37:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-03 19:37:28,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-03 19:37:28,886 INFO L175 Difference]: Start difference. First operand has 372 places, 541 transitions, 7349 flow. Second operand 9 states and 149 transitions. [2024-06-03 19:37:28,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 569 transitions, 8712 flow [2024-06-03 19:37:32,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 569 transitions, 8494 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-03 19:37:32,324 INFO L231 Difference]: Finished difference. Result has 374 places, 544 transitions, 7379 flow [2024-06-03 19:37:32,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7131, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7379, PETRI_PLACES=374, PETRI_TRANSITIONS=544} [2024-06-03 19:37:32,325 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-03 19:37:32,325 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 544 transitions, 7379 flow [2024-06-03 19:37:32,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:32,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:32,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:32,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 19:37:32,326 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 19:37:32,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:32,326 INFO L85 PathProgramCache]: Analyzing trace with hash 318707210, now seen corresponding path program 1 times [2024-06-03 19:37:32,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:32,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241401440] [2024-06-03 19:37:32,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:32,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:33,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:33,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241401440] [2024-06-03 19:37:33,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241401440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:33,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:33,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:37:33,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553562593] [2024-06-03 19:37:33,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:33,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:37:33,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:33,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:37:33,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:37:33,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:37:33,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 544 transitions, 7379 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:33,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:33,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:37:33,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:34,484 INFO L124 PetriNetUnfolderBase]: 3421/5266 cut-off events. [2024-06-03 19:37:34,485 INFO L125 PetriNetUnfolderBase]: For 1364541/1364550 co-relation queries the response was YES. [2024-06-03 19:37:34,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62468 conditions, 5266 events. 3421/5266 cut-off events. For 1364541/1364550 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 29357 event pairs, 607 based on Foata normal form. 8/5270 useless extension candidates. Maximal degree in co-relation 62284. Up to 4660 conditions per place. [2024-06-03 19:37:34,566 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 482 selfloop transitions, 94 changer transitions 0/580 dead transitions. [2024-06-03 19:37:34,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 580 transitions, 8790 flow [2024-06-03 19:37:34,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:37:34,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:37:34,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:37:34,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:37:34,568 INFO L175 Difference]: Start difference. First operand has 374 places, 544 transitions, 7379 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:37:34,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 580 transitions, 8790 flow [2024-06-03 19:37:38,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 580 transitions, 8564 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-03 19:37:38,147 INFO L231 Difference]: Finished difference. Result has 376 places, 552 transitions, 7512 flow [2024-06-03 19:37:38,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7153, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7512, PETRI_PLACES=376, PETRI_TRANSITIONS=552} [2024-06-03 19:37:38,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-03 19:37:38,148 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 552 transitions, 7512 flow [2024-06-03 19:37:38,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:38,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:38,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:38,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 19:37:38,148 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 19:37:38,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:38,149 INFO L85 PathProgramCache]: Analyzing trace with hash -54116806, now seen corresponding path program 2 times [2024-06-03 19:37:38,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:38,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375611078] [2024-06-03 19:37:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:38,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:38,891 INFO 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 19:37:38,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:38,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375611078] [2024-06-03 19:37:38,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375611078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:38,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:38,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:37:38,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650972354] [2024-06-03 19:37:38,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:38,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:37:38,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:38,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:37:38,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:37:38,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:37:38,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 552 transitions, 7512 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:38,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:38,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:37:38,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:40,388 INFO L124 PetriNetUnfolderBase]: 3447/5306 cut-off events. [2024-06-03 19:37:40,388 INFO L125 PetriNetUnfolderBase]: For 1398654/1398663 co-relation queries the response was YES. [2024-06-03 19:37:40,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63570 conditions, 5306 events. 3447/5306 cut-off events. For 1398654/1398663 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 29641 event pairs, 603 based on Foata normal form. 8/5310 useless extension candidates. Maximal degree in co-relation 63384. Up to 4653 conditions per place. [2024-06-03 19:37:40,478 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 478 selfloop transitions, 102 changer transitions 0/584 dead transitions. [2024-06-03 19:37:40,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 584 transitions, 9209 flow [2024-06-03 19:37:40,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:37:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:37:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 19:37:40,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-03 19:37:40,479 INFO L175 Difference]: Start difference. First operand has 376 places, 552 transitions, 7512 flow. Second operand 8 states and 145 transitions. [2024-06-03 19:37:40,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 584 transitions, 9209 flow [2024-06-03 19:37:44,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 584 transitions, 8997 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-03 19:37:44,748 INFO L231 Difference]: Finished difference. Result has 380 places, 558 transitions, 7696 flow [2024-06-03 19:37:44,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7300, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7696, PETRI_PLACES=380, PETRI_TRANSITIONS=558} [2024-06-03 19:37:44,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-03 19:37:44,748 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 558 transitions, 7696 flow [2024-06-03 19:37:44,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:44,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:44,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:44,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 19:37:44,750 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 19:37:44,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:44,754 INFO L85 PathProgramCache]: Analyzing trace with hash -57811696, now seen corresponding path program 3 times [2024-06-03 19:37:44,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:44,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541940877] [2024-06-03 19:37:44,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:44,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:45,522 INFO 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 19:37:45,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:45,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541940877] [2024-06-03 19:37:45,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541940877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:45,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:45,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:37:45,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660175567] [2024-06-03 19:37:45,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:45,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:37:45,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:45,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:37:45,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:37:45,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:37:45,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 558 transitions, 7696 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:45,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:45,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:37:45,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:46,973 INFO L124 PetriNetUnfolderBase]: 3457/5324 cut-off events. [2024-06-03 19:37:46,973 INFO L125 PetriNetUnfolderBase]: For 1420214/1420221 co-relation queries the response was YES. [2024-06-03 19:37:47,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63949 conditions, 5324 events. 3457/5324 cut-off events. For 1420214/1420221 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 29839 event pairs, 609 based on Foata normal form. 3/5323 useless extension candidates. Maximal degree in co-relation 63762. Up to 4710 conditions per place. [2024-06-03 19:37:47,063 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 494 selfloop transitions, 93 changer transitions 0/591 dead transitions. [2024-06-03 19:37:47,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 591 transitions, 9144 flow [2024-06-03 19:37:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:37:47,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:37:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 19:37:47,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 19:37:47,065 INFO L175 Difference]: Start difference. First operand has 380 places, 558 transitions, 7696 flow. Second operand 8 states and 139 transitions. [2024-06-03 19:37:47,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 591 transitions, 9144 flow [2024-06-03 19:37:50,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 591 transitions, 8940 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-03 19:37:50,966 INFO L231 Difference]: Finished difference. Result has 385 places, 566 transitions, 7877 flow [2024-06-03 19:37:50,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7506, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7877, PETRI_PLACES=385, PETRI_TRANSITIONS=566} [2024-06-03 19:37:50,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-03 19:37:50,966 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 566 transitions, 7877 flow [2024-06-03 19:37:50,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:50,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:50,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:50,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 19:37:50,967 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 19:37:50,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:50,968 INFO L85 PathProgramCache]: Analyzing trace with hash -110236225, now seen corresponding path program 1 times [2024-06-03 19:37:50,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:50,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433217529] [2024-06-03 19:37:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:50,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:51,940 INFO 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 19:37:51,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:51,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433217529] [2024-06-03 19:37:51,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433217529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:51,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:51,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:37:51,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145237382] [2024-06-03 19:37:51,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:51,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:37:51,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:51,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:37:51,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:37:52,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:37:52,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 566 transitions, 7877 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:52,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:52,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:37:52,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:53,572 INFO L124 PetriNetUnfolderBase]: 3451/5297 cut-off events. [2024-06-03 19:37:53,572 INFO L125 PetriNetUnfolderBase]: For 1425687/1425694 co-relation queries the response was YES. [2024-06-03 19:37:53,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64220 conditions, 5297 events. 3451/5297 cut-off events. For 1425687/1425694 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 29465 event pairs, 601 based on Foata normal form. 3/5296 useless extension candidates. Maximal degree in co-relation 64030. Up to 4676 conditions per place. [2024-06-03 19:37:53,664 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 488 selfloop transitions, 99 changer transitions 0/591 dead transitions. [2024-06-03 19:37:53,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 591 transitions, 9153 flow [2024-06-03 19:37:53,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:37:53,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:37:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 19:37:53,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-03 19:37:53,666 INFO L175 Difference]: Start difference. First operand has 385 places, 566 transitions, 7877 flow. Second operand 8 states and 142 transitions. [2024-06-03 19:37:53,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 591 transitions, 9153 flow [2024-06-03 19:37:58,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 591 transitions, 8914 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-03 19:37:58,185 INFO L231 Difference]: Finished difference. Result has 389 places, 566 transitions, 7852 flow [2024-06-03 19:37:58,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7638, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7852, PETRI_PLACES=389, PETRI_TRANSITIONS=566} [2024-06-03 19:37:58,185 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-03 19:37:58,185 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 566 transitions, 7852 flow [2024-06-03 19:37:58,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:58,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:58,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:58,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 19:37:58,186 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 19:37:58,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:58,187 INFO L85 PathProgramCache]: Analyzing trace with hash -654085624, now seen corresponding path program 1 times [2024-06-03 19:37:58,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:58,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339731048] [2024-06-03 19:37:58,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:58,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:59,103 INFO 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 19:37:59,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:59,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339731048] [2024-06-03 19:37:59,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339731048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:59,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:59,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:37:59,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996339200] [2024-06-03 19:37:59,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:59,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:37:59,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:59,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:37:59,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:37:59,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:37:59,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 566 transitions, 7852 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:59,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:59,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:37:59,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:00,703 INFO L124 PetriNetUnfolderBase]: 3471/5327 cut-off events. [2024-06-03 19:38:00,703 INFO L125 PetriNetUnfolderBase]: For 1467534/1467541 co-relation queries the response was YES. [2024-06-03 19:38:00,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64646 conditions, 5327 events. 3471/5327 cut-off events. For 1467534/1467541 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 29698 event pairs, 600 based on Foata normal form. 5/5328 useless extension candidates. Maximal degree in co-relation 64455. Up to 4702 conditions per place. [2024-06-03 19:38:00,785 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 493 selfloop transitions, 100 changer transitions 0/597 dead transitions. [2024-06-03 19:38:00,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 597 transitions, 9292 flow [2024-06-03 19:38:00,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:38:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:38:00,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 19:38:00,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-03 19:38:00,786 INFO L175 Difference]: Start difference. First operand has 389 places, 566 transitions, 7852 flow. Second operand 9 states and 156 transitions. [2024-06-03 19:38:00,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 597 transitions, 9292 flow [2024-06-03 19:38:05,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 597 transitions, 9079 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 19:38:05,044 INFO L231 Difference]: Finished difference. Result has 391 places, 570 transitions, 7990 flow [2024-06-03 19:38:05,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7639, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7990, PETRI_PLACES=391, PETRI_TRANSITIONS=570} [2024-06-03 19:38:05,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-03 19:38:05,045 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 570 transitions, 7990 flow [2024-06-03 19:38:05,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:05,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:05,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:05,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 19:38:05,046 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 19:38:05,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:05,046 INFO L85 PathProgramCache]: Analyzing trace with hash 9030584, now seen corresponding path program 4 times [2024-06-03 19:38:05,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:05,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600718983] [2024-06-03 19:38:05,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:05,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:05,846 INFO 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 19:38:05,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:05,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600718983] [2024-06-03 19:38:05,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600718983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:05,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:05,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:05,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660909216] [2024-06-03 19:38:05,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:05,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:05,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:05,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:05,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:05,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:38:05,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 570 transitions, 7990 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:05,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:05,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:38:05,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:07,407 INFO L124 PetriNetUnfolderBase]: 3481/5362 cut-off events. [2024-06-03 19:38:07,407 INFO L125 PetriNetUnfolderBase]: For 1478562/1478569 co-relation queries the response was YES. [2024-06-03 19:38:07,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65541 conditions, 5362 events. 3481/5362 cut-off events. For 1478562/1478569 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 30096 event pairs, 604 based on Foata normal form. 3/5361 useless extension candidates. Maximal degree in co-relation 65349. Up to 4696 conditions per place. [2024-06-03 19:38:07,519 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 488 selfloop transitions, 103 changer transitions 0/595 dead transitions. [2024-06-03 19:38:07,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 595 transitions, 9368 flow [2024-06-03 19:38:07,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:07,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:07,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:38:07,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-03 19:38:07,520 INFO L175 Difference]: Start difference. First operand has 391 places, 570 transitions, 7990 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:38:07,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 595 transitions, 9368 flow [2024-06-03 19:38:12,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 595 transitions, 9045 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-03 19:38:12,863 INFO L231 Difference]: Finished difference. Result has 392 places, 573 transitions, 7982 flow [2024-06-03 19:38:12,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7667, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7982, PETRI_PLACES=392, PETRI_TRANSITIONS=573} [2024-06-03 19:38:12,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-03 19:38:12,864 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 573 transitions, 7982 flow [2024-06-03 19:38:12,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:12,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:12,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:12,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 19:38:12,865 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 19:38:12,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:12,865 INFO L85 PathProgramCache]: Analyzing trace with hash 12750026, now seen corresponding path program 2 times [2024-06-03 19:38:12,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:12,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169136833] [2024-06-03 19:38:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:12,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:13,815 INFO 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 19:38:13,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:13,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169136833] [2024-06-03 19:38:13,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169136833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:13,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:13,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:38:13,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448526947] [2024-06-03 19:38:13,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:13,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:38:13,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:13,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:38:13,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:38:13,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:38:13,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 573 transitions, 7982 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:13,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:13,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:38:13,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:15,325 INFO L124 PetriNetUnfolderBase]: 3501/5382 cut-off events. [2024-06-03 19:38:15,325 INFO L125 PetriNetUnfolderBase]: For 1518701/1518708 co-relation queries the response was YES. [2024-06-03 19:38:15,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65849 conditions, 5382 events. 3501/5382 cut-off events. For 1518701/1518708 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 30129 event pairs, 603 based on Foata normal form. 5/5383 useless extension candidates. Maximal degree in co-relation 65656. Up to 4704 conditions per place. [2024-06-03 19:38:15,424 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 488 selfloop transitions, 109 changer transitions 0/601 dead transitions. [2024-06-03 19:38:15,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 601 transitions, 9436 flow [2024-06-03 19:38:15,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:38:15,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:38:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 19:38:15,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-03 19:38:15,426 INFO L175 Difference]: Start difference. First operand has 392 places, 573 transitions, 7982 flow. Second operand 9 states and 156 transitions. [2024-06-03 19:38:15,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 601 transitions, 9436 flow [2024-06-03 19:38:20,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 601 transitions, 9157 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-03 19:38:20,878 INFO L231 Difference]: Finished difference. Result has 395 places, 577 transitions, 8080 flow [2024-06-03 19:38:20,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7703, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8080, PETRI_PLACES=395, PETRI_TRANSITIONS=577} [2024-06-03 19:38:20,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-03 19:38:20,878 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 577 transitions, 8080 flow [2024-06-03 19:38:20,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:20,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:20,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:20,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 19:38:20,879 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 19:38:20,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:20,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1974920900, now seen corresponding path program 5 times [2024-06-03 19:38:20,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:20,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845817553] [2024-06-03 19:38:20,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:20,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:21,679 INFO 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 19:38:21,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:21,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845817553] [2024-06-03 19:38:21,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845817553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:21,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:21,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:21,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251501175] [2024-06-03 19:38:21,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:21,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:21,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:21,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:21,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:21,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:38:21,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 577 transitions, 8080 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:21,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:21,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:38:21,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:23,394 INFO L124 PetriNetUnfolderBase]: 3527/5417 cut-off events. [2024-06-03 19:38:23,394 INFO L125 PetriNetUnfolderBase]: For 1547520/1547527 co-relation queries the response was YES. [2024-06-03 19:38:23,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67145 conditions, 5417 events. 3527/5417 cut-off events. For 1547520/1547527 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 30322 event pairs, 638 based on Foata normal form. 3/5416 useless extension candidates. Maximal degree in co-relation 66951. Up to 4576 conditions per place. [2024-06-03 19:38:23,480 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 459 selfloop transitions, 141 changer transitions 0/604 dead transitions. [2024-06-03 19:38:23,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 604 transitions, 10102 flow [2024-06-03 19:38:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:23,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:23,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 19:38:23,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 19:38:23,481 INFO L175 Difference]: Start difference. First operand has 395 places, 577 transitions, 8080 flow. Second operand 8 states and 140 transitions. [2024-06-03 19:38:23,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 604 transitions, 10102 flow [2024-06-03 19:38:28,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 604 transitions, 9753 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-03 19:38:28,441 INFO L231 Difference]: Finished difference. Result has 396 places, 583 transitions, 8225 flow [2024-06-03 19:38:28,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7731, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8225, PETRI_PLACES=396, PETRI_TRANSITIONS=583} [2024-06-03 19:38:28,441 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-03 19:38:28,442 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 583 transitions, 8225 flow [2024-06-03 19:38:28,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:28,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:28,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:28,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 19:38:28,442 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:28,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:28,443 INFO L85 PathProgramCache]: Analyzing trace with hash 12755823, now seen corresponding path program 1 times [2024-06-03 19:38:28,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:28,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747818385] [2024-06-03 19:38:28,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:28,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:29,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:29,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747818385] [2024-06-03 19:38:29,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747818385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:29,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:29,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:38:29,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621970582] [2024-06-03 19:38:29,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:29,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:38:29,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:29,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:38:29,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:38:29,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:38:29,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 583 transitions, 8225 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:29,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:29,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:38:29,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:31,051 INFO L124 PetriNetUnfolderBase]: 3547/5442 cut-off events. [2024-06-03 19:38:31,052 INFO L125 PetriNetUnfolderBase]: For 1583349/1583359 co-relation queries the response was YES. [2024-06-03 19:38:31,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67488 conditions, 5442 events. 3547/5442 cut-off events. For 1583349/1583359 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 30505 event pairs, 594 based on Foata normal form. 9/5448 useless extension candidates. Maximal degree in co-relation 67293. Up to 5120 conditions per place. [2024-06-03 19:38:31,144 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 561 selfloop transitions, 46 changer transitions 0/611 dead transitions. [2024-06-03 19:38:31,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 611 transitions, 9696 flow [2024-06-03 19:38:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:38:31,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:38:31,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 19:38:31,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-03 19:38:31,146 INFO L175 Difference]: Start difference. First operand has 396 places, 583 transitions, 8225 flow. Second operand 9 states and 147 transitions. [2024-06-03 19:38:31,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 611 transitions, 9696 flow [2024-06-03 19:38:36,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 611 transitions, 9427 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-03 19:38:36,252 INFO L231 Difference]: Finished difference. Result has 401 places, 589 transitions, 8229 flow [2024-06-03 19:38:36,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7956, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8229, PETRI_PLACES=401, PETRI_TRANSITIONS=589} [2024-06-03 19:38:36,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-03 19:38:36,252 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 589 transitions, 8229 flow [2024-06-03 19:38:36,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:36,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:36,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:36,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 19:38:36,253 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:36,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:36,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1009552108, now seen corresponding path program 6 times [2024-06-03 19:38:36,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:36,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177537593] [2024-06-03 19:38:36,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:36,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:37,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:37,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177537593] [2024-06-03 19:38:37,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177537593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:37,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:37,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:37,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777524701] [2024-06-03 19:38:37,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:37,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:37,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:37,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:37,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:37,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:38:37,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 589 transitions, 8229 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:37,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:37,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:38:37,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:38,564 INFO L124 PetriNetUnfolderBase]: 3541/5439 cut-off events. [2024-06-03 19:38:38,564 INFO L125 PetriNetUnfolderBase]: For 1572647/1572654 co-relation queries the response was YES. [2024-06-03 19:38:38,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66979 conditions, 5439 events. 3541/5439 cut-off events. For 1572647/1572654 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 30489 event pairs, 628 based on Foata normal form. 3/5438 useless extension candidates. Maximal degree in co-relation 66783. Up to 4599 conditions per place. [2024-06-03 19:38:38,656 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 459 selfloop transitions, 147 changer transitions 0/610 dead transitions. [2024-06-03 19:38:38,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 610 transitions, 10067 flow [2024-06-03 19:38:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:38,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:38,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 19:38:38,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-03 19:38:38,657 INFO L175 Difference]: Start difference. First operand has 401 places, 589 transitions, 8229 flow. Second operand 8 states and 141 transitions. [2024-06-03 19:38:38,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 610 transitions, 10067 flow [2024-06-03 19:38:43,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 610 transitions, 9820 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-03 19:38:43,801 INFO L231 Difference]: Finished difference. Result has 402 places, 589 transitions, 8282 flow [2024-06-03 19:38:43,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7982, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8282, PETRI_PLACES=402, PETRI_TRANSITIONS=589} [2024-06-03 19:38:43,802 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-03 19:38:43,802 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 589 transitions, 8282 flow [2024-06-03 19:38:43,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:43,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:43,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:43,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 19:38:43,802 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:43,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:43,803 INFO L85 PathProgramCache]: Analyzing trace with hash -53788144, now seen corresponding path program 3 times [2024-06-03 19:38:43,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:43,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893499655] [2024-06-03 19:38:43,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:43,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:44,706 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 19:38:44,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:44,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893499655] [2024-06-03 19:38:44,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893499655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:44,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:44,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:38:44,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116907119] [2024-06-03 19:38:44,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:44,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:38:44,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:44,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:38:44,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:38:44,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:38:44,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 589 transitions, 8282 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:44,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:44,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:38:44,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:46,336 INFO L124 PetriNetUnfolderBase]: 3561/5464 cut-off events. [2024-06-03 19:38:46,336 INFO L125 PetriNetUnfolderBase]: For 1614950/1614960 co-relation queries the response was YES. [2024-06-03 19:38:46,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67650 conditions, 5464 events. 3561/5464 cut-off events. For 1614950/1614960 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 30625 event pairs, 595 based on Foata normal form. 9/5470 useless extension candidates. Maximal degree in co-relation 67453. Up to 5140 conditions per place. [2024-06-03 19:38:46,425 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 567 selfloop transitions, 44 changer transitions 0/615 dead transitions. [2024-06-03 19:38:46,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 615 transitions, 9736 flow [2024-06-03 19:38:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:38:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:38:46,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 19:38:46,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-03 19:38:46,427 INFO L175 Difference]: Start difference. First operand has 402 places, 589 transitions, 8282 flow. Second operand 9 states and 147 transitions. [2024-06-03 19:38:46,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 615 transitions, 9736 flow [2024-06-03 19:38:51,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 615 transitions, 9175 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-03 19:38:51,725 INFO L231 Difference]: Finished difference. Result has 402 places, 593 transitions, 7976 flow [2024-06-03 19:38:51,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7721, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7976, PETRI_PLACES=402, PETRI_TRANSITIONS=593} [2024-06-03 19:38:51,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-03 19:38:51,726 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 593 transitions, 7976 flow [2024-06-03 19:38:51,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:51,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:51,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:51,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 19:38:51,726 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:51,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:51,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1208865647, now seen corresponding path program 2 times [2024-06-03 19:38:51,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:51,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140225742] [2024-06-03 19:38:51,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:51,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:52,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:52,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140225742] [2024-06-03 19:38:52,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140225742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:52,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:52,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:38:52,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22397979] [2024-06-03 19:38:52,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:52,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:38:52,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:52,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:38:52,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:38:52,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:38:52,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 593 transitions, 7976 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:52,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:52,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:38:52,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:54,303 INFO L124 PetriNetUnfolderBase]: 3581/5492 cut-off events. [2024-06-03 19:38:54,303 INFO L125 PetriNetUnfolderBase]: For 1638011/1638021 co-relation queries the response was YES. [2024-06-03 19:38:54,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67580 conditions, 5492 events. 3581/5492 cut-off events. For 1638011/1638021 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 30697 event pairs, 598 based on Foata normal form. 9/5498 useless extension candidates. Maximal degree in co-relation 67384. Up to 5130 conditions per place. [2024-06-03 19:38:54,402 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 558 selfloop transitions, 55 changer transitions 0/617 dead transitions. [2024-06-03 19:38:54,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 617 transitions, 9455 flow [2024-06-03 19:38:54,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:38:54,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:38:54,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-03 19:38:54,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-03 19:38:54,403 INFO L175 Difference]: Start difference. First operand has 402 places, 593 transitions, 7976 flow. Second operand 9 states and 145 transitions. [2024-06-03 19:38:54,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 617 transitions, 9455 flow [2024-06-03 19:38:59,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 617 transitions, 9228 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-03 19:38:59,768 INFO L231 Difference]: Finished difference. Result has 404 places, 599 transitions, 8052 flow [2024-06-03 19:38:59,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7749, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8052, PETRI_PLACES=404, PETRI_TRANSITIONS=599} [2024-06-03 19:38:59,769 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-03 19:38:59,769 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 599 transitions, 8052 flow [2024-06-03 19:38:59,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:59,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:59,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:59,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 19:38:59,770 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:59,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:59,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1778283049, now seen corresponding path program 3 times [2024-06-03 19:38:59,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:59,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392049507] [2024-06-03 19:38:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:59,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:00,977 INFO 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 19:39:00,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:00,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392049507] [2024-06-03 19:39:00,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392049507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:00,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:00,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:00,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474060614] [2024-06-03 19:39:00,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:00,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:00,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:00,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:00,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:01,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:39:01,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 599 transitions, 8052 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:01,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:01,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:39:01,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:02,603 INFO L124 PetriNetUnfolderBase]: 3591/5504 cut-off events. [2024-06-03 19:39:02,603 INFO L125 PetriNetUnfolderBase]: For 1644692/1644702 co-relation queries the response was YES. [2024-06-03 19:39:02,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67715 conditions, 5504 events. 3591/5504 cut-off events. For 1644692/1644702 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 30835 event pairs, 591 based on Foata normal form. 7/5508 useless extension candidates. Maximal degree in co-relation 67518. Up to 5042 conditions per place. [2024-06-03 19:39:02,687 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 535 selfloop transitions, 88 changer transitions 0/627 dead transitions. [2024-06-03 19:39:02,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 627 transitions, 9884 flow [2024-06-03 19:39:02,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:02,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:02,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 19:39:02,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-03 19:39:02,689 INFO L175 Difference]: Start difference. First operand has 404 places, 599 transitions, 8052 flow. Second operand 9 states and 147 transitions. [2024-06-03 19:39:02,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 627 transitions, 9884 flow [2024-06-03 19:39:07,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 627 transitions, 9644 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-03 19:39:07,575 INFO L231 Difference]: Finished difference. Result has 407 places, 606 transitions, 8238 flow [2024-06-03 19:39:07,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7837, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8238, PETRI_PLACES=407, PETRI_TRANSITIONS=606} [2024-06-03 19:39:07,575 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-03 19:39:07,575 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 606 transitions, 8238 flow [2024-06-03 19:39:07,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:07,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:07,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:07,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 19:39:07,576 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:07,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:07,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1149673330, now seen corresponding path program 4 times [2024-06-03 19:39:07,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:07,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277032302] [2024-06-03 19:39:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:07,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:08,694 INFO 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 19:39:08,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:08,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277032302] [2024-06-03 19:39:08,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277032302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:08,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:08,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:08,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766101787] [2024-06-03 19:39:08,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:08,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:08,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:08,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:08,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:08,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:39:08,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 606 transitions, 8238 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:08,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:08,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:39:08,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:10,490 INFO L124 PetriNetUnfolderBase]: 3643/5578 cut-off events. [2024-06-03 19:39:10,490 INFO L125 PetriNetUnfolderBase]: For 1729443/1729453 co-relation queries the response was YES. [2024-06-03 19:39:10,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69568 conditions, 5578 events. 3643/5578 cut-off events. For 1729443/1729453 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 31214 event pairs, 595 based on Foata normal form. 9/5584 useless extension candidates. Maximal degree in co-relation 69369. Up to 5118 conditions per place. [2024-06-03 19:39:10,597 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 559 selfloop transitions, 71 changer transitions 0/634 dead transitions. [2024-06-03 19:39:10,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 634 transitions, 10168 flow [2024-06-03 19:39:10,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:10,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-03 19:39:10,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-03 19:39:10,599 INFO L175 Difference]: Start difference. First operand has 407 places, 606 transitions, 8238 flow. Second operand 9 states and 149 transitions. [2024-06-03 19:39:10,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 634 transitions, 10168 flow [2024-06-03 19:39:15,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 634 transitions, 9768 flow, removed 54 selfloop flow, removed 9 redundant places. [2024-06-03 19:39:15,732 INFO L231 Difference]: Finished difference. Result has 407 places, 613 transitions, 8259 flow [2024-06-03 19:39:15,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7838, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8259, PETRI_PLACES=407, PETRI_TRANSITIONS=613} [2024-06-03 19:39:15,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-03 19:39:15,733 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 613 transitions, 8259 flow [2024-06-03 19:39:15,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:15,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:15,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:15,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 19:39:15,733 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:15,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:15,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1142316100, now seen corresponding path program 5 times [2024-06-03 19:39:15,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:15,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887231202] [2024-06-03 19:39:15,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:15,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:16,780 INFO 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 19:39:16,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:16,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887231202] [2024-06-03 19:39:16,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887231202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:16,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:16,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:16,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233108444] [2024-06-03 19:39:16,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:16,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:16,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:16,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:16,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:16,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:39:16,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 613 transitions, 8259 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:16,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:16,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:39:16,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:18,585 INFO L124 PetriNetUnfolderBase]: 3727/5697 cut-off events. [2024-06-03 19:39:18,585 INFO L125 PetriNetUnfolderBase]: For 1837201/1837208 co-relation queries the response was YES. [2024-06-03 19:39:18,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72631 conditions, 5697 events. 3727/5697 cut-off events. For 1837201/1837208 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 31880 event pairs, 647 based on Foata normal form. 5/5698 useless extension candidates. Maximal degree in co-relation 72433. Up to 4586 conditions per place. [2024-06-03 19:39:18,690 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 476 selfloop transitions, 167 changer transitions 0/647 dead transitions. [2024-06-03 19:39:18,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 647 transitions, 10697 flow [2024-06-03 19:39:18,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:18,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:39:18,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-03 19:39:18,692 INFO L175 Difference]: Start difference. First operand has 407 places, 613 transitions, 8259 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:39:18,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 647 transitions, 10697 flow [2024-06-03 19:39:23,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 647 transitions, 10440 flow, removed 98 selfloop flow, removed 5 redundant places. [2024-06-03 19:39:23,597 INFO L231 Difference]: Finished difference. Result has 412 places, 624 transitions, 8814 flow [2024-06-03 19:39:23,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8024, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8814, PETRI_PLACES=412, PETRI_TRANSITIONS=624} [2024-06-03 19:39:23,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-03 19:39:23,597 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 624 transitions, 8814 flow [2024-06-03 19:39:23,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:23,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:23,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:23,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 19:39:23,598 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:23,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:23,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1208865430, now seen corresponding path program 6 times [2024-06-03 19:39:23,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:23,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631351539] [2024-06-03 19:39:23,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:23,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:24,595 INFO 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 19:39:24,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:24,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631351539] [2024-06-03 19:39:24,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631351539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:24,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:24,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:24,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084978903] [2024-06-03 19:39:24,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:24,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:24,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:24,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:24,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:24,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:39:24,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 624 transitions, 8814 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:24,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:24,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:39:24,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:26,190 INFO L124 PetriNetUnfolderBase]: 3715/5688 cut-off events. [2024-06-03 19:39:26,191 INFO L125 PetriNetUnfolderBase]: For 1830780/1830790 co-relation queries the response was YES. [2024-06-03 19:39:26,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72864 conditions, 5688 events. 3715/5688 cut-off events. For 1830780/1830790 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 31949 event pairs, 593 based on Foata normal form. 9/5694 useless extension candidates. Maximal degree in co-relation 72663. Up to 5316 conditions per place. [2024-06-03 19:39:26,295 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 585 selfloop transitions, 53 changer transitions 0/642 dead transitions. [2024-06-03 19:39:26,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 642 transitions, 10154 flow [2024-06-03 19:39:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:26,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-03 19:39:26,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-03 19:39:26,297 INFO L175 Difference]: Start difference. First operand has 412 places, 624 transitions, 8814 flow. Second operand 9 states and 145 transitions. [2024-06-03 19:39:26,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 642 transitions, 10154 flow [2024-06-03 19:39:31,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 642 transitions, 9746 flow, removed 153 selfloop flow, removed 4 redundant places. [2024-06-03 19:39:31,243 INFO L231 Difference]: Finished difference. Result has 417 places, 624 transitions, 8519 flow [2024-06-03 19:39:31,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8406, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8519, PETRI_PLACES=417, PETRI_TRANSITIONS=624} [2024-06-03 19:39:31,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-03 19:39:31,243 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 624 transitions, 8519 flow [2024-06-03 19:39:31,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:31,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:31,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:31,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 19:39:31,244 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:31,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:31,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1149673547, now seen corresponding path program 4 times [2024-06-03 19:39:31,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:31,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258953881] [2024-06-03 19:39:31,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:31,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:32,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:32,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258953881] [2024-06-03 19:39:32,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258953881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:32,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:32,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:32,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653569988] [2024-06-03 19:39:32,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:32,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:32,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:32,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:32,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:32,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:39:32,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 624 transitions, 8519 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:32,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:32,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:39:32,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:34,252 INFO L124 PetriNetUnfolderBase]: 3717/5681 cut-off events. [2024-06-03 19:39:34,253 INFO L125 PetriNetUnfolderBase]: For 1814582/1814592 co-relation queries the response was YES. [2024-06-03 19:39:34,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72058 conditions, 5681 events. 3717/5681 cut-off events. For 1814582/1814592 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 31817 event pairs, 602 based on Foata normal form. 7/5685 useless extension candidates. Maximal degree in co-relation 71855. Up to 5215 conditions per place. [2024-06-03 19:39:34,347 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 555 selfloop transitions, 89 changer transitions 0/648 dead transitions. [2024-06-03 19:39:34,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 648 transitions, 10311 flow [2024-06-03 19:39:34,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:34,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:34,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-03 19:39:34,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-03 19:39:34,349 INFO L175 Difference]: Start difference. First operand has 417 places, 624 transitions, 8519 flow. Second operand 9 states and 148 transitions. [2024-06-03 19:39:34,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 648 transitions, 10311 flow [2024-06-03 19:39:39,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 648 transitions, 10189 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 19:39:39,771 INFO L231 Difference]: Finished difference. Result has 418 places, 627 transitions, 8692 flow [2024-06-03 19:39:39,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8397, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8692, PETRI_PLACES=418, PETRI_TRANSITIONS=627} [2024-06-03 19:39:39,771 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-03 19:39:39,771 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 627 transitions, 8692 flow [2024-06-03 19:39:39,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:39,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:39,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:39,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 19:39:39,772 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:39,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:39,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1789715198, now seen corresponding path program 4 times [2024-06-03 19:39:39,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:39,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006879989] [2024-06-03 19:39:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:39,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:40,933 INFO 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 19:39:40,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:40,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006879989] [2024-06-03 19:39:40,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006879989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:40,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:40,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:40,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194693959] [2024-06-03 19:39:40,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:40,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:40,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:40,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:40,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:41,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:39:41,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 627 transitions, 8692 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:41,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:41,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:39:41,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:42,728 INFO L124 PetriNetUnfolderBase]: 3733/5707 cut-off events. [2024-06-03 19:39:42,728 INFO L125 PetriNetUnfolderBase]: For 1863867/1863877 co-relation queries the response was YES. [2024-06-03 19:39:42,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72774 conditions, 5707 events. 3733/5707 cut-off events. For 1863867/1863877 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 32006 event pairs, 606 based on Foata normal form. 9/5713 useless extension candidates. Maximal degree in co-relation 72570. Up to 5343 conditions per place. [2024-06-03 19:39:42,836 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 591 selfloop transitions, 53 changer transitions 0/648 dead transitions. [2024-06-03 19:39:42,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 648 transitions, 10196 flow [2024-06-03 19:39:42,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:42,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:42,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-03 19:39:42,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:39:42,838 INFO L175 Difference]: Start difference. First operand has 418 places, 627 transitions, 8692 flow. Second operand 9 states and 144 transitions. [2024-06-03 19:39:42,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 648 transitions, 10196 flow [2024-06-03 19:39:48,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 648 transitions, 9966 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-03 19:39:48,497 INFO L231 Difference]: Finished difference. Result has 421 places, 630 transitions, 8744 flow [2024-06-03 19:39:48,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8462, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8744, PETRI_PLACES=421, PETRI_TRANSITIONS=630} [2024-06-03 19:39:48,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-03 19:39:48,498 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 630 transitions, 8744 flow [2024-06-03 19:39:48,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:48,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:48,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:48,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 19:39:48,499 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:48,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:48,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1138499008, now seen corresponding path program 5 times [2024-06-03 19:39:48,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:48,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785152198] [2024-06-03 19:39:48,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:48,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:49,590 INFO 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 19:39:49,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:49,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785152198] [2024-06-03 19:39:49,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785152198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:49,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:49,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:49,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948314828] [2024-06-03 19:39:49,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:49,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:49,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:49,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:49,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:49,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:39:49,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 630 transitions, 8744 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:49,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:49,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:39:49,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:51,287 INFO L124 PetriNetUnfolderBase]: 3749/5731 cut-off events. [2024-06-03 19:39:51,288 INFO L125 PetriNetUnfolderBase]: For 1895979/1895989 co-relation queries the response was YES. [2024-06-03 19:39:51,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73365 conditions, 5731 events. 3749/5731 cut-off events. For 1895979/1895989 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 32182 event pairs, 604 based on Foata normal form. 9/5737 useless extension candidates. Maximal degree in co-relation 73160. Up to 5357 conditions per place. [2024-06-03 19:39:51,398 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 596 selfloop transitions, 52 changer transitions 0/652 dead transitions. [2024-06-03 19:39:51,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 652 transitions, 10264 flow [2024-06-03 19:39:51,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:51,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:51,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-03 19:39:51,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:39:51,400 INFO L175 Difference]: Start difference. First operand has 421 places, 630 transitions, 8744 flow. Second operand 9 states and 144 transitions. [2024-06-03 19:39:51,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 652 transitions, 10264 flow [2024-06-03 19:39:57,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 652 transitions, 10004 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-03 19:39:57,381 INFO L231 Difference]: Finished difference. Result has 423 places, 633 transitions, 8770 flow [2024-06-03 19:39:57,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8484, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8770, PETRI_PLACES=423, PETRI_TRANSITIONS=633} [2024-06-03 19:39:57,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-03 19:39:57,382 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 633 transitions, 8770 flow [2024-06-03 19:39:57,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:57,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:57,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:57,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 19:39:57,382 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:57,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:57,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1149550198, now seen corresponding path program 6 times [2024-06-03 19:39:57,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:57,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188522841] [2024-06-03 19:39:57,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:57,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:58,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:58,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188522841] [2024-06-03 19:39:58,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188522841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:58,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:58,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:58,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423125170] [2024-06-03 19:39:58,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:58,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:58,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:58,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:58,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:58,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:39:58,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 633 transitions, 8770 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:58,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:58,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:39:58,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:00,598 INFO L124 PetriNetUnfolderBase]: 3765/5755 cut-off events. [2024-06-03 19:40:00,598 INFO L125 PetriNetUnfolderBase]: For 1923406/1923416 co-relation queries the response was YES. [2024-06-03 19:40:00,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73855 conditions, 5755 events. 3765/5755 cut-off events. For 1923406/1923416 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 32334 event pairs, 608 based on Foata normal form. 9/5761 useless extension candidates. Maximal degree in co-relation 73649. Up to 5345 conditions per place. [2024-06-03 19:40:00,694 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 579 selfloop transitions, 71 changer transitions 0/654 dead transitions. [2024-06-03 19:40:00,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 654 transitions, 10298 flow [2024-06-03 19:40:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:00,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:00,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-03 19:40:00,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-03 19:40:00,696 INFO L175 Difference]: Start difference. First operand has 423 places, 633 transitions, 8770 flow. Second operand 9 states and 145 transitions. [2024-06-03 19:40:00,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 654 transitions, 10298 flow [2024-06-03 19:40:07,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 654 transitions, 10034 flow, removed 82 selfloop flow, removed 7 redundant places. [2024-06-03 19:40:07,045 INFO L231 Difference]: Finished difference. Result has 425 places, 636 transitions, 8836 flow [2024-06-03 19:40:07,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8506, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8836, PETRI_PLACES=425, PETRI_TRANSITIONS=636} [2024-06-03 19:40:07,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-03 19:40:07,050 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 636 transitions, 8836 flow [2024-06-03 19:40:07,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:07,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:07,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:07,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 19:40:07,052 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:07,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:07,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1216494127, now seen corresponding path program 1 times [2024-06-03 19:40:07,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:07,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318422735] [2024-06-03 19:40:07,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:07,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:08,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:08,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318422735] [2024-06-03 19:40:08,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318422735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:08,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:08,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:40:08,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912208110] [2024-06-03 19:40:08,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:08,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:40:08,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:08,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:40:08,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:40:08,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:40:08,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 636 transitions, 8836 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:08,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:08,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:40:08,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:10,345 INFO L124 PetriNetUnfolderBase]: 3773/5771 cut-off events. [2024-06-03 19:40:10,345 INFO L125 PetriNetUnfolderBase]: For 1930817/1930823 co-relation queries the response was YES. [2024-06-03 19:40:10,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74257 conditions, 5771 events. 3773/5771 cut-off events. For 1930817/1930823 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 32462 event pairs, 621 based on Foata normal form. 8/5777 useless extension candidates. Maximal degree in co-relation 74050. Up to 5568 conditions per place. [2024-06-03 19:40:10,452 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 630 selfloop transitions, 23 changer transitions 0/657 dead transitions. [2024-06-03 19:40:10,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 657 transitions, 10355 flow [2024-06-03 19:40:10,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:10,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:10,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-03 19:40:10,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36243386243386244 [2024-06-03 19:40:10,454 INFO L175 Difference]: Start difference. First operand has 425 places, 636 transitions, 8836 flow. Second operand 9 states and 137 transitions. [2024-06-03 19:40:10,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 657 transitions, 10355 flow [2024-06-03 19:40:16,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 657 transitions, 10047 flow, removed 85 selfloop flow, removed 7 redundant places. [2024-06-03 19:40:16,970 INFO L231 Difference]: Finished difference. Result has 427 places, 638 transitions, 8735 flow [2024-06-03 19:40:16,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8528, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8735, PETRI_PLACES=427, PETRI_TRANSITIONS=638} [2024-06-03 19:40:16,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-03 19:40:16,971 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 638 transitions, 8735 flow [2024-06-03 19:40:16,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:16,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:16,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:16,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 19:40:16,971 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:16,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:16,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1205381092, now seen corresponding path program 1 times [2024-06-03 19:40:16,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:16,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104019010] [2024-06-03 19:40:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:16,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:18,176 INFO 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 19:40:18,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:18,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104019010] [2024-06-03 19:40:18,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104019010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:18,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:18,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:40:18,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550497430] [2024-06-03 19:40:18,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:18,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:40:18,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:18,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:40:18,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:40:18,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:40:18,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 638 transitions, 8735 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:18,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:18,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:40:18,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:19,935 INFO L124 PetriNetUnfolderBase]: 3775/5770 cut-off events. [2024-06-03 19:40:19,935 INFO L125 PetriNetUnfolderBase]: For 1942129/1942139 co-relation queries the response was YES. [2024-06-03 19:40:20,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73867 conditions, 5770 events. 3775/5770 cut-off events. For 1942129/1942139 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 32436 event pairs, 608 based on Foata normal form. 7/5774 useless extension candidates. Maximal degree in co-relation 73659. Up to 5406 conditions per place. [2024-06-03 19:40:20,038 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 598 selfloop transitions, 57 changer transitions 0/659 dead transitions. [2024-06-03 19:40:20,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 659 transitions, 10267 flow [2024-06-03 19:40:20,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:20,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-03 19:40:20,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-03 19:40:20,039 INFO L175 Difference]: Start difference. First operand has 427 places, 638 transitions, 8735 flow. Second operand 9 states and 145 transitions. [2024-06-03 19:40:20,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 659 transitions, 10267 flow [2024-06-03 19:40:25,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 659 transitions, 10076 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-03 19:40:25,645 INFO L231 Difference]: Finished difference. Result has 429 places, 642 transitions, 8848 flow [2024-06-03 19:40:25,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8544, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8848, PETRI_PLACES=429, PETRI_TRANSITIONS=642} [2024-06-03 19:40:25,645 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-03 19:40:25,645 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 642 transitions, 8848 flow [2024-06-03 19:40:25,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:25,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:25,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:25,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 19:40:25,646 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:25,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:25,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1960172574, now seen corresponding path program 7 times [2024-06-03 19:40:25,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:25,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083706155] [2024-06-03 19:40:25,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:25,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:26,406 INFO 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 19:40:26,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:26,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083706155] [2024-06-03 19:40:26,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083706155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:26,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:26,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:26,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327131254] [2024-06-03 19:40:26,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:26,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:26,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:26,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:26,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:26,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:40:26,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 642 transitions, 8848 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:26,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:26,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:40:26,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:28,176 INFO L124 PetriNetUnfolderBase]: 3777/5780 cut-off events. [2024-06-03 19:40:28,176 INFO L125 PetriNetUnfolderBase]: For 1955781/1955795 co-relation queries the response was YES. [2024-06-03 19:40:28,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73901 conditions, 5780 events. 3777/5780 cut-off events. For 1955781/1955795 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 32596 event pairs, 659 based on Foata normal form. 8/5771 useless extension candidates. Maximal degree in co-relation 73692. Up to 5163 conditions per place. [2024-06-03 19:40:28,282 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 571 selfloop transitions, 96 changer transitions 0/671 dead transitions. [2024-06-03 19:40:28,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 671 transitions, 10435 flow [2024-06-03 19:40:28,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:28,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:28,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 19:40:28,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-03 19:40:28,283 INFO L175 Difference]: Start difference. First operand has 429 places, 642 transitions, 8848 flow. Second operand 8 states and 134 transitions. [2024-06-03 19:40:28,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 671 transitions, 10435 flow [2024-06-03 19:40:34,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 671 transitions, 10187 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-03 19:40:34,020 INFO L231 Difference]: Finished difference. Result has 431 places, 650 transitions, 8986 flow [2024-06-03 19:40:34,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8600, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8986, PETRI_PLACES=431, PETRI_TRANSITIONS=650} [2024-06-03 19:40:34,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-03 19:40:34,021 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 650 transitions, 8986 flow [2024-06-03 19:40:34,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:34,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:34,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:34,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 19:40:34,021 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:34,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:34,022 INFO L85 PathProgramCache]: Analyzing trace with hash 918450443, now seen corresponding path program 2 times [2024-06-03 19:40:34,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:34,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469760313] [2024-06-03 19:40:34,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:34,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:34,896 INFO 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 19:40:34,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:34,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469760313] [2024-06-03 19:40:34,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469760313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:34,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:34,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:40:34,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756547419] [2024-06-03 19:40:34,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:34,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:40:34,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:34,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:40:34,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:40:34,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:40:34,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 650 transitions, 8986 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:34,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:34,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:40:34,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:36,731 INFO L124 PetriNetUnfolderBase]: 3782/5770 cut-off events. [2024-06-03 19:40:36,732 INFO L125 PetriNetUnfolderBase]: For 1970304/1970312 co-relation queries the response was YES. [2024-06-03 19:40:36,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74548 conditions, 5770 events. 3782/5770 cut-off events. For 1970304/1970312 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 32380 event pairs, 625 based on Foata normal form. 3/5753 useless extension candidates. Maximal degree in co-relation 74337. Up to 5165 conditions per place. [2024-06-03 19:40:36,852 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 564 selfloop transitions, 107 changer transitions 0/675 dead transitions. [2024-06-03 19:40:36,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 675 transitions, 10512 flow [2024-06-03 19:40:36,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:36,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 19:40:36,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 19:40:36,853 INFO L175 Difference]: Start difference. First operand has 431 places, 650 transitions, 8986 flow. Second operand 8 states and 139 transitions. [2024-06-03 19:40:36,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 675 transitions, 10512 flow [2024-06-03 19:40:42,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 675 transitions, 10316 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-03 19:40:42,956 INFO L231 Difference]: Finished difference. Result has 435 places, 653 transitions, 9120 flow [2024-06-03 19:40:42,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8790, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9120, PETRI_PLACES=435, PETRI_TRANSITIONS=653} [2024-06-03 19:40:42,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-03 19:40:42,957 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 653 transitions, 9120 flow [2024-06-03 19:40:42,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:42,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:42,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:42,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 19:40:42,958 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:42,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:42,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1390599081, now seen corresponding path program 3 times [2024-06-03 19:40:42,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:42,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310252844] [2024-06-03 19:40:42,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:42,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:43,862 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 19:40:43,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:43,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310252844] [2024-06-03 19:40:43,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310252844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:43,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:43,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:40:43,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446514955] [2024-06-03 19:40:43,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:43,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:40:43,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:43,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:40:43,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:40:43,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:40:43,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 653 transitions, 9120 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:43,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:43,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:40:43,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:45,608 INFO L124 PetriNetUnfolderBase]: 3779/5764 cut-off events. [2024-06-03 19:40:45,608 INFO L125 PetriNetUnfolderBase]: For 1984981/1984989 co-relation queries the response was YES. [2024-06-03 19:40:45,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74494 conditions, 5764 events. 3779/5764 cut-off events. For 1984981/1984989 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 32351 event pairs, 609 based on Foata normal form. 3/5747 useless extension candidates. Maximal degree in co-relation 74281. Up to 5093 conditions per place. [2024-06-03 19:40:45,715 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 539 selfloop transitions, 131 changer transitions 0/674 dead transitions. [2024-06-03 19:40:45,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 674 transitions, 10844 flow [2024-06-03 19:40:45,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:45,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 19:40:45,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 19:40:45,716 INFO L175 Difference]: Start difference. First operand has 435 places, 653 transitions, 9120 flow. Second operand 8 states and 139 transitions. [2024-06-03 19:40:45,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 674 transitions, 10844 flow [2024-06-03 19:40:51,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 674 transitions, 10504 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-03 19:40:51,925 INFO L231 Difference]: Finished difference. Result has 437 places, 653 transitions, 9054 flow [2024-06-03 19:40:51,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8782, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9054, PETRI_PLACES=437, PETRI_TRANSITIONS=653} [2024-06-03 19:40:51,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-03 19:40:51,926 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 653 transitions, 9054 flow [2024-06-03 19:40:51,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:51,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:51,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:51,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 19:40:51,927 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:51,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:51,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1349828344, now seen corresponding path program 8 times [2024-06-03 19:40:51,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:51,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073238971] [2024-06-03 19:40:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:51,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:52,817 INFO 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 19:40:52,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:52,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073238971] [2024-06-03 19:40:52,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073238971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:52,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:52,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:52,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762522665] [2024-06-03 19:40:52,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:52,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:52,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:52,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:52,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:52,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:40:52,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 653 transitions, 9054 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:52,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:52,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:40:52,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:54,672 INFO L124 PetriNetUnfolderBase]: 3781/5788 cut-off events. [2024-06-03 19:40:54,672 INFO L125 PetriNetUnfolderBase]: For 1986465/1986479 co-relation queries the response was YES. [2024-06-03 19:40:54,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74385 conditions, 5788 events. 3781/5788 cut-off events. For 1986465/1986479 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 32663 event pairs, 661 based on Foata normal form. 8/5779 useless extension candidates. Maximal degree in co-relation 74171. Up to 5153 conditions per place. [2024-06-03 19:40:54,774 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 570 selfloop transitions, 101 changer transitions 0/675 dead transitions. [2024-06-03 19:40:54,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 675 transitions, 10575 flow [2024-06-03 19:40:54,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:54,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:54,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 19:40:54,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-03 19:40:54,776 INFO L175 Difference]: Start difference. First operand has 437 places, 653 transitions, 9054 flow. Second operand 8 states and 134 transitions. [2024-06-03 19:40:54,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 675 transitions, 10575 flow [2024-06-03 19:41:01,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 675 transitions, 10233 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-03 19:41:01,142 INFO L231 Difference]: Finished difference. Result has 436 places, 656 transitions, 9019 flow [2024-06-03 19:41:01,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8712, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9019, PETRI_PLACES=436, PETRI_TRANSITIONS=656} [2024-06-03 19:41:01,142 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-03 19:41:01,143 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 656 transitions, 9019 flow [2024-06-03 19:41:01,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:01,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:01,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:01,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 19:41:01,143 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:01,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:01,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1960183176, now seen corresponding path program 7 times [2024-06-03 19:41:01,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:01,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265070539] [2024-06-03 19:41:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:01,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:02,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:02,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265070539] [2024-06-03 19:41:02,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265070539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:02,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:02,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:41:02,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143308260] [2024-06-03 19:41:02,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:02,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:41:02,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:02,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:41:02,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:41:02,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:41:02,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 656 transitions, 9019 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:02,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:02,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:41:02,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:03,920 INFO L124 PetriNetUnfolderBase]: 3791/5788 cut-off events. [2024-06-03 19:41:03,921 INFO L125 PetriNetUnfolderBase]: For 2013169/2013177 co-relation queries the response was YES. [2024-06-03 19:41:03,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74630 conditions, 5788 events. 3791/5788 cut-off events. For 2013169/2013177 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 32547 event pairs, 630 based on Foata normal form. 4/5772 useless extension candidates. Maximal degree in co-relation 74417. Up to 5175 conditions per place. [2024-06-03 19:41:04,027 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 569 selfloop transitions, 110 changer transitions 0/683 dead transitions. [2024-06-03 19:41:04,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 683 transitions, 10607 flow [2024-06-03 19:41:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:41:04,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:41:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-03 19:41:04,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-03 19:41:04,029 INFO L175 Difference]: Start difference. First operand has 436 places, 656 transitions, 9019 flow. Second operand 9 states and 151 transitions. [2024-06-03 19:41:04,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 683 transitions, 10607 flow [2024-06-03 19:41:10,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 683 transitions, 10341 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:10,327 INFO L231 Difference]: Finished difference. Result has 439 places, 659 transitions, 9111 flow [2024-06-03 19:41:10,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8753, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9111, PETRI_PLACES=439, PETRI_TRANSITIONS=659} [2024-06-03 19:41:10,328 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-03 19:41:10,328 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 659 transitions, 9111 flow [2024-06-03 19:41:10,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:10,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:10,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:10,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 19:41:10,329 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:10,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:10,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1477439846, now seen corresponding path program 8 times [2024-06-03 19:41:10,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:10,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720825364] [2024-06-03 19:41:10,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:10,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:11,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:11,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720825364] [2024-06-03 19:41:11,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720825364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:11,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:11,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:41:11,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588423244] [2024-06-03 19:41:11,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:11,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:41:11,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:11,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:41:11,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:41:11,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:41:11,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 659 transitions, 9111 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:11,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:11,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:41:11,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:13,121 INFO L124 PetriNetUnfolderBase]: 3833/5840 cut-off events. [2024-06-03 19:41:13,121 INFO L125 PetriNetUnfolderBase]: For 2090200/2090208 co-relation queries the response was YES. [2024-06-03 19:41:13,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76535 conditions, 5840 events. 3833/5840 cut-off events. For 2090200/2090208 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 32792 event pairs, 622 based on Foata normal form. 4/5827 useless extension candidates. Maximal degree in co-relation 76321. Up to 5137 conditions per place. [2024-06-03 19:41:13,232 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 553 selfloop transitions, 135 changer transitions 0/692 dead transitions. [2024-06-03 19:41:13,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 692 transitions, 11257 flow [2024-06-03 19:41:13,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:41:13,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:41:13,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 19:41:13,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-03 19:41:13,233 INFO L175 Difference]: Start difference. First operand has 439 places, 659 transitions, 9111 flow. Second operand 9 states and 154 transitions. [2024-06-03 19:41:13,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 692 transitions, 11257 flow [2024-06-03 19:41:19,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 692 transitions, 10925 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-03 19:41:19,320 INFO L231 Difference]: Finished difference. Result has 442 places, 669 transitions, 9452 flow [2024-06-03 19:41:19,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8779, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9452, PETRI_PLACES=442, PETRI_TRANSITIONS=669} [2024-06-03 19:41:19,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-03 19:41:19,321 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 669 transitions, 9452 flow [2024-06-03 19:41:19,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:19,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:19,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:19,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 19:41:19,322 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:19,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:19,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1704091384, now seen corresponding path program 9 times [2024-06-03 19:41:19,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:19,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045577016] [2024-06-03 19:41:19,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:19,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:20,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:20,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045577016] [2024-06-03 19:41:20,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045577016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:20,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:20,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:20,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580631790] [2024-06-03 19:41:20,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:20,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:20,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:20,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:20,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:20,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:41:20,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 669 transitions, 9452 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:20,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:20,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:41:20,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:22,033 INFO L124 PetriNetUnfolderBase]: 3843/5878 cut-off events. [2024-06-03 19:41:22,033 INFO L125 PetriNetUnfolderBase]: For 2122750/2122764 co-relation queries the response was YES. [2024-06-03 19:41:22,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77258 conditions, 5878 events. 3843/5878 cut-off events. For 2122750/2122764 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 33246 event pairs, 660 based on Foata normal form. 8/5869 useless extension candidates. Maximal degree in co-relation 77042. Up to 5161 conditions per place. [2024-06-03 19:41:22,137 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 563 selfloop transitions, 122 changer transitions 0/689 dead transitions. [2024-06-03 19:41:22,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 689 transitions, 10994 flow [2024-06-03 19:41:22,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:22,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:22,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 19:41:22,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-03 19:41:22,138 INFO L175 Difference]: Start difference. First operand has 442 places, 669 transitions, 9452 flow. Second operand 8 states and 132 transitions. [2024-06-03 19:41:22,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 689 transitions, 10994 flow [2024-06-03 19:41:27,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 689 transitions, 10655 flow, removed 94 selfloop flow, removed 5 redundant places. [2024-06-03 19:41:27,658 INFO L231 Difference]: Finished difference. Result has 445 places, 672 transitions, 9451 flow [2024-06-03 19:41:27,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9113, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9451, PETRI_PLACES=445, PETRI_TRANSITIONS=672} [2024-06-03 19:41:27,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-03 19:41:27,659 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 672 transitions, 9451 flow [2024-06-03 19:41:27,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:27,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:27,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:27,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 19:41:27,659 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:27,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:27,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1980521080, now seen corresponding path program 9 times [2024-06-03 19:41:27,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:27,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019087247] [2024-06-03 19:41:27,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:27,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:28,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:28,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019087247] [2024-06-03 19:41:28,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019087247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:28,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:28,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:41:28,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516663264] [2024-06-03 19:41:28,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:28,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:41:28,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:28,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:41:28,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:41:28,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:41:28,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 672 transitions, 9451 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:28,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:28,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:41:28,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:30,424 INFO L124 PetriNetUnfolderBase]: 3837/5846 cut-off events. [2024-06-03 19:41:30,424 INFO L125 PetriNetUnfolderBase]: For 2121755/2121763 co-relation queries the response was YES. [2024-06-03 19:41:30,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76909 conditions, 5846 events. 3837/5846 cut-off events. For 2121755/2121763 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 32855 event pairs, 625 based on Foata normal form. 4/5833 useless extension candidates. Maximal degree in co-relation 76691. Up to 5197 conditions per place. [2024-06-03 19:41:30,533 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 570 selfloop transitions, 122 changer transitions 0/696 dead transitions. [2024-06-03 19:41:30,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 696 transitions, 11023 flow [2024-06-03 19:41:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:41:30,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:41:30,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-03 19:41:30,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-03 19:41:30,534 INFO L175 Difference]: Start difference. First operand has 445 places, 672 transitions, 9451 flow. Second operand 9 states and 151 transitions. [2024-06-03 19:41:30,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 696 transitions, 11023 flow [2024-06-03 19:41:37,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 696 transitions, 10719 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:37,311 INFO L231 Difference]: Finished difference. Result has 448 places, 674 transitions, 9481 flow [2024-06-03 19:41:37,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9147, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9481, PETRI_PLACES=448, PETRI_TRANSITIONS=674} [2024-06-03 19:41:37,312 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-03 19:41:37,312 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 674 transitions, 9481 flow [2024-06-03 19:41:37,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:37,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:37,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:37,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 19:41:37,313 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:37,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:37,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1420230003, now seen corresponding path program 4 times [2024-06-03 19:41:37,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:37,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12170084] [2024-06-03 19:41:37,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:37,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:38,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:38,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12170084] [2024-06-03 19:41:38,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12170084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:38,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:38,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:41:38,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734272520] [2024-06-03 19:41:38,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:38,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:41:38,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:38,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:41:38,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:41:38,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:41:38,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 674 transitions, 9481 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:38,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:38,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:41:38,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:40,056 INFO L124 PetriNetUnfolderBase]: 3834/5851 cut-off events. [2024-06-03 19:41:40,056 INFO L125 PetriNetUnfolderBase]: For 2126790/2126798 co-relation queries the response was YES. [2024-06-03 19:41:40,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76837 conditions, 5851 events. 3834/5851 cut-off events. For 2126790/2126798 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 32971 event pairs, 646 based on Foata normal form. 3/5835 useless extension candidates. Maximal degree in co-relation 76618. Up to 5238 conditions per place. [2024-06-03 19:41:40,172 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 586 selfloop transitions, 105 changer transitions 0/695 dead transitions. [2024-06-03 19:41:40,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 695 transitions, 10945 flow [2024-06-03 19:41:40,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:40,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 19:41:40,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 19:41:40,174 INFO L175 Difference]: Start difference. First operand has 448 places, 674 transitions, 9481 flow. Second operand 8 states and 140 transitions. [2024-06-03 19:41:40,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 695 transitions, 10945 flow [2024-06-03 19:41:47,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 695 transitions, 10555 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-03 19:41:47,332 INFO L231 Difference]: Finished difference. Result has 449 places, 674 transitions, 9313 flow [2024-06-03 19:41:47,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9091, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9313, PETRI_PLACES=449, PETRI_TRANSITIONS=674} [2024-06-03 19:41:47,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-03 19:41:47,333 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 674 transitions, 9313 flow [2024-06-03 19:41:47,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:47,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:47,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:47,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 19:41:47,334 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:47,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:47,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1647207258, now seen corresponding path program 10 times [2024-06-03 19:41:47,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:47,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103171341] [2024-06-03 19:41:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:47,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:48,315 INFO 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 19:41:48,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:48,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103171341] [2024-06-03 19:41:48,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103171341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:48,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:48,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:41:48,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502918163] [2024-06-03 19:41:48,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:48,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:41:48,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:48,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:41:48,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:41:48,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:41:48,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 674 transitions, 9313 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:48,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:48,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:41:48,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:50,285 INFO L124 PetriNetUnfolderBase]: 3828/5842 cut-off events. [2024-06-03 19:41:50,285 INFO L125 PetriNetUnfolderBase]: For 2139914/2139922 co-relation queries the response was YES. [2024-06-03 19:41:50,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76282 conditions, 5842 events. 3828/5842 cut-off events. For 2139914/2139922 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 32898 event pairs, 656 based on Foata normal form. 4/5829 useless extension candidates. Maximal degree in co-relation 76062. Up to 5227 conditions per place. [2024-06-03 19:41:50,388 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 587 selfloop transitions, 106 changer transitions 0/697 dead transitions. [2024-06-03 19:41:50,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 697 transitions, 10799 flow [2024-06-03 19:41:50,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:41:50,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:41:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 19:41:50,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-03 19:41:50,389 INFO L175 Difference]: Start difference. First operand has 449 places, 674 transitions, 9313 flow. Second operand 9 states and 152 transitions. [2024-06-03 19:41:50,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 697 transitions, 10799 flow [2024-06-03 19:41:57,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 697 transitions, 10430 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-03 19:41:57,758 INFO L231 Difference]: Finished difference. Result has 450 places, 674 transitions, 9162 flow [2024-06-03 19:41:57,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8944, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9162, PETRI_PLACES=450, PETRI_TRANSITIONS=674} [2024-06-03 19:41:57,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-03 19:41:57,759 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 674 transitions, 9162 flow [2024-06-03 19:41:57,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:57,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:57,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:57,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 19:41:57,760 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:57,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:57,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1643488188, now seen corresponding path program 11 times [2024-06-03 19:41:57,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:57,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122996186] [2024-06-03 19:41:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:57,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:58,781 INFO 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 19:41:58,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:58,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122996186] [2024-06-03 19:41:58,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122996186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:58,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:58,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:41:58,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147322924] [2024-06-03 19:41:58,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:58,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:41:58,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:58,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:41:58,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:41:58,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:41:58,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 674 transitions, 9162 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:58,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:58,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:41:58,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:00,690 INFO L124 PetriNetUnfolderBase]: 3838/5855 cut-off events. [2024-06-03 19:42:00,690 INFO L125 PetriNetUnfolderBase]: For 2167168/2167176 co-relation queries the response was YES. [2024-06-03 19:42:00,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76545 conditions, 5855 events. 3838/5855 cut-off events. For 2167168/2167176 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 32972 event pairs, 654 based on Foata normal form. 4/5842 useless extension candidates. Maximal degree in co-relation 76324. Up to 5178 conditions per place. [2024-06-03 19:42:00,797 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 573 selfloop transitions, 129 changer transitions 0/706 dead transitions. [2024-06-03 19:42:00,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 706 transitions, 11690 flow [2024-06-03 19:42:00,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:42:00,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:42:00,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 19:42:00,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-03 19:42:00,798 INFO L175 Difference]: Start difference. First operand has 450 places, 674 transitions, 9162 flow. Second operand 9 states and 155 transitions. [2024-06-03 19:42:00,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 706 transitions, 11690 flow [2024-06-03 19:42:09,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 706 transitions, 11466 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 19:42:09,158 INFO L231 Difference]: Finished difference. Result has 453 places, 683 transitions, 9624 flow [2024-06-03 19:42:09,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8938, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9624, PETRI_PLACES=453, PETRI_TRANSITIONS=683} [2024-06-03 19:42:09,158 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 410 predicate places. [2024-06-03 19:42:09,158 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 683 transitions, 9624 flow [2024-06-03 19:42:09,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:09,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:09,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:09,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 19:42:09,159 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:09,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:09,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1416414988, now seen corresponding path program 12 times [2024-06-03 19:42:09,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:09,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767019475] [2024-06-03 19:42:09,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:09,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:10,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:10,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767019475] [2024-06-03 19:42:10,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767019475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:10,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:10,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:42:10,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110712483] [2024-06-03 19:42:10,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:10,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:42:10,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:10,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:42:10,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:42:10,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:42:10,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 683 transitions, 9624 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:10,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:10,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:42:10,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:11,941 INFO L124 PetriNetUnfolderBase]: 3832/5857 cut-off events. [2024-06-03 19:42:11,941 INFO L125 PetriNetUnfolderBase]: For 2172337/2172345 co-relation queries the response was YES. [2024-06-03 19:42:12,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76464 conditions, 5857 events. 3832/5857 cut-off events. For 2172337/2172345 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 33049 event pairs, 613 based on Foata normal form. 4/5851 useless extension candidates. Maximal degree in co-relation 76241. Up to 5543 conditions per place. [2024-06-03 19:42:12,053 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 657 selfloop transitions, 42 changer transitions 0/703 dead transitions. [2024-06-03 19:42:12,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 703 transitions, 11100 flow [2024-06-03 19:42:12,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:42:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:42:12,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-03 19:42:12,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-03 19:42:12,054 INFO L175 Difference]: Start difference. First operand has 453 places, 683 transitions, 9624 flow. Second operand 9 states and 142 transitions. [2024-06-03 19:42:12,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 703 transitions, 11100 flow [2024-06-03 19:42:19,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 703 transitions, 10726 flow, removed 128 selfloop flow, removed 4 redundant places. [2024-06-03 19:42:19,386 INFO L231 Difference]: Finished difference. Result has 458 places, 683 transitions, 9340 flow [2024-06-03 19:42:19,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9250, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9340, PETRI_PLACES=458, PETRI_TRANSITIONS=683} [2024-06-03 19:42:19,387 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-03 19:42:19,387 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 683 transitions, 9340 flow [2024-06-03 19:42:19,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:19,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:19,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:19,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 19:42:19,388 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:19,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:19,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1416414771, now seen corresponding path program 5 times [2024-06-03 19:42:19,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:19,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605808499] [2024-06-03 19:42:19,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:19,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:20,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:20,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605808499] [2024-06-03 19:42:20,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605808499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:20,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:20,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:42:20,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058839173] [2024-06-03 19:42:20,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:20,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:42:20,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:20,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:42:20,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:42:20,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:42:20,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 683 transitions, 9340 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:20,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:20,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:42:20,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:22,333 INFO L124 PetriNetUnfolderBase]: 3832/5856 cut-off events. [2024-06-03 19:42:22,333 INFO L125 PetriNetUnfolderBase]: For 2178928/2178936 co-relation queries the response was YES. [2024-06-03 19:42:22,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76129 conditions, 5856 events. 3832/5856 cut-off events. For 2178928/2178936 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 33046 event pairs, 613 based on Foata normal form. 4/5850 useless extension candidates. Maximal degree in co-relation 75904. Up to 5543 conditions per place. [2024-06-03 19:42:22,453 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 659 selfloop transitions, 43 changer transitions 0/706 dead transitions. [2024-06-03 19:42:22,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 706 transitions, 10933 flow [2024-06-03 19:42:22,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:42:22,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:42:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-03 19:42:22,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-03 19:42:22,454 INFO L175 Difference]: Start difference. First operand has 458 places, 683 transitions, 9340 flow. Second operand 9 states and 142 transitions. [2024-06-03 19:42:22,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 706 transitions, 10933 flow [2024-06-03 19:42:31,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 706 transitions, 10775 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-03 19:42:31,061 INFO L231 Difference]: Finished difference. Result has 459 places, 686 transitions, 9395 flow [2024-06-03 19:42:31,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9198, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9395, PETRI_PLACES=459, PETRI_TRANSITIONS=686} [2024-06-03 19:42:31,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-03 19:42:31,062 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 686 transitions, 9395 flow [2024-06-03 19:42:31,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:31,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:31,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:31,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 19:42:31,063 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:31,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:31,063 INFO L85 PathProgramCache]: Analyzing trace with hash 748731088, now seen corresponding path program 10 times [2024-06-03 19:42:31,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:31,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577400345] [2024-06-03 19:42:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:31,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:31,888 INFO 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 19:42:31,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:31,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577400345] [2024-06-03 19:42:31,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577400345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:31,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:31,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:31,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877176227] [2024-06-03 19:42:31,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:31,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:31,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:31,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:31,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:31,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:42:31,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 686 transitions, 9395 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:31,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:31,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:42:31,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:33,600 INFO L124 PetriNetUnfolderBase]: 3858/5901 cut-off events. [2024-06-03 19:42:33,601 INFO L125 PetriNetUnfolderBase]: For 2232820/2232831 co-relation queries the response was YES. [2024-06-03 19:42:33,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76887 conditions, 5901 events. 3858/5901 cut-off events. For 2232820/2232831 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 33434 event pairs, 696 based on Foata normal form. 4/5891 useless extension candidates. Maximal degree in co-relation 76661. Up to 4893 conditions per place. [2024-06-03 19:42:33,718 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 505 selfloop transitions, 200 changer transitions 0/709 dead transitions. [2024-06-03 19:42:33,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 709 transitions, 12013 flow [2024-06-03 19:42:33,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:33,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:33,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:42:33,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-03 19:42:33,719 INFO L175 Difference]: Start difference. First operand has 459 places, 686 transitions, 9395 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:42:33,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 709 transitions, 12013 flow [2024-06-03 19:42:40,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 709 transitions, 11848 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-03 19:42:40,884 INFO L231 Difference]: Finished difference. Result has 460 places, 692 transitions, 9814 flow [2024-06-03 19:42:40,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9230, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9814, PETRI_PLACES=460, PETRI_TRANSITIONS=692} [2024-06-03 19:42:40,885 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-03 19:42:40,885 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 692 transitions, 9814 flow [2024-06-03 19:42:40,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:40,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:40,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:40,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-03 19:42:40,886 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:40,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:40,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1586153540, now seen corresponding path program 13 times [2024-06-03 19:42:40,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:40,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009467842] [2024-06-03 19:42:40,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:40,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:42,103 INFO 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 19:42:42,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:42,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009467842] [2024-06-03 19:42:42,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009467842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:42,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:42,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:42:42,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598244288] [2024-06-03 19:42:42,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:42,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:42:42,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:42,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:42:42,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:42:42,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:42:42,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 692 transitions, 9814 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:42,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:42,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:42:42,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:43,934 INFO L124 PetriNetUnfolderBase]: 3868/5890 cut-off events. [2024-06-03 19:42:43,935 INFO L125 PetriNetUnfolderBase]: For 2263795/2263803 co-relation queries the response was YES. [2024-06-03 19:42:44,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77731 conditions, 5890 events. 3868/5890 cut-off events. For 2263795/2263803 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 33097 event pairs, 626 based on Foata normal form. 4/5877 useless extension candidates. Maximal degree in co-relation 77504. Up to 5148 conditions per place. [2024-06-03 19:42:44,045 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 554 selfloop transitions, 156 changer transitions 0/714 dead transitions. [2024-06-03 19:42:44,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 714 transitions, 11490 flow [2024-06-03 19:42:44,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:42:44,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:42:44,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 19:42:44,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-03 19:42:44,047 INFO L175 Difference]: Start difference. First operand has 460 places, 692 transitions, 9814 flow. Second operand 9 states and 150 transitions. [2024-06-03 19:42:44,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 714 transitions, 11490 flow [2024-06-03 19:42:51,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 714 transitions, 11069 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-03 19:42:51,743 INFO L231 Difference]: Finished difference. Result has 465 places, 695 transitions, 9865 flow [2024-06-03 19:42:51,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9393, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9865, PETRI_PLACES=465, PETRI_TRANSITIONS=695} [2024-06-03 19:42:51,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-03 19:42:51,744 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 695 transitions, 9865 flow [2024-06-03 19:42:51,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:51,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:51,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:51,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-03 19:42:51,745 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:51,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:51,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1288896870, now seen corresponding path program 14 times [2024-06-03 19:42:51,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:51,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768197786] [2024-06-03 19:42:51,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:51,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:52,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:52,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768197786] [2024-06-03 19:42:52,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768197786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:52,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:52,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:42:52,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056228825] [2024-06-03 19:42:52,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:52,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:42:52,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:52,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:42:52,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:42:52,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:42:52,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 695 transitions, 9865 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:52,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:52,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:42:52,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:54,575 INFO L124 PetriNetUnfolderBase]: 3878/5922 cut-off events. [2024-06-03 19:42:54,576 INFO L125 PetriNetUnfolderBase]: For 2294918/2294926 co-relation queries the response was YES. [2024-06-03 19:42:54,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78339 conditions, 5922 events. 3878/5922 cut-off events. For 2294918/2294926 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 33435 event pairs, 616 based on Foata normal form. 4/5916 useless extension candidates. Maximal degree in co-relation 78111. Up to 5587 conditions per place. [2024-06-03 19:42:54,688 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 660 selfloop transitions, 51 changer transitions 0/715 dead transitions. [2024-06-03 19:42:54,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 715 transitions, 11507 flow [2024-06-03 19:42:54,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:42:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:42:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-03 19:42:54,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-03 19:42:54,689 INFO L175 Difference]: Start difference. First operand has 465 places, 695 transitions, 9865 flow. Second operand 9 states and 141 transitions. [2024-06-03 19:42:54,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 715 transitions, 11507 flow [2024-06-03 19:43:02,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 715 transitions, 11057 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-03 19:43:02,487 INFO L231 Difference]: Finished difference. Result has 467 places, 698 transitions, 9683 flow [2024-06-03 19:43:02,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9415, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9683, PETRI_PLACES=467, PETRI_TRANSITIONS=698} [2024-06-03 19:43:02,488 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-03 19:43:02,488 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 698 transitions, 9683 flow [2024-06-03 19:43:02,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:02,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:02,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:02,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-03 19:43:02,489 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:02,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:02,489 INFO L85 PathProgramCache]: Analyzing trace with hash 748725508, now seen corresponding path program 11 times [2024-06-03 19:43:02,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:02,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073742860] [2024-06-03 19:43:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:02,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:03,343 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 19:43:03,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:03,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073742860] [2024-06-03 19:43:03,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073742860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:03,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:03,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:03,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033817507] [2024-06-03 19:43:03,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:03,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:03,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:03,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:03,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:03,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:43:03,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 698 transitions, 9683 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:03,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:03,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:43:03,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:05,104 INFO L124 PetriNetUnfolderBase]: 3872/5921 cut-off events. [2024-06-03 19:43:05,104 INFO L125 PetriNetUnfolderBase]: For 2296258/2296269 co-relation queries the response was YES. [2024-06-03 19:43:05,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77828 conditions, 5921 events. 3872/5921 cut-off events. For 2296258/2296269 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33523 event pairs, 695 based on Foata normal form. 4/5911 useless extension candidates. Maximal degree in co-relation 77599. Up to 4916 conditions per place. [2024-06-03 19:43:05,212 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 504 selfloop transitions, 206 changer transitions 0/714 dead transitions. [2024-06-03 19:43:05,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 714 transitions, 11833 flow [2024-06-03 19:43:05,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:05,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:43:05,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-03 19:43:05,213 INFO L175 Difference]: Start difference. First operand has 467 places, 698 transitions, 9683 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:43:05,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 714 transitions, 11833 flow [2024-06-03 19:43:12,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 714 transitions, 11527 flow, removed 104 selfloop flow, removed 7 redundant places. [2024-06-03 19:43:12,826 INFO L231 Difference]: Finished difference. Result has 468 places, 698 transitions, 9795 flow [2024-06-03 19:43:12,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9377, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9795, PETRI_PLACES=468, PETRI_TRANSITIONS=698} [2024-06-03 19:43:12,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 425 predicate places. [2024-06-03 19:43:12,827 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 698 transitions, 9795 flow [2024-06-03 19:43:12,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:12,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:12,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:12,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-03 19:43:12,828 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:12,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:12,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1593505190, now seen corresponding path program 15 times [2024-06-03 19:43:12,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:12,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661589810] [2024-06-03 19:43:12,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:12,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:13,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:13,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661589810] [2024-06-03 19:43:13,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661589810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:13,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:13,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:43:13,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971995445] [2024-06-03 19:43:13,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:13,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:43:13,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:13,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:43:13,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:43:13,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:43:13,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 698 transitions, 9795 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:13,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:13,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:43:13,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:15,821 INFO L124 PetriNetUnfolderBase]: 3938/5983 cut-off events. [2024-06-03 19:43:15,822 INFO L125 PetriNetUnfolderBase]: For 2425847/2425855 co-relation queries the response was YES. [2024-06-03 19:43:15,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81120 conditions, 5983 events. 3938/5983 cut-off events. For 2425847/2425855 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 33657 event pairs, 637 based on Foata normal form. 4/5970 useless extension candidates. Maximal degree in co-relation 80890. Up to 5049 conditions per place. [2024-06-03 19:43:15,943 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 523 selfloop transitions, 214 changer transitions 0/741 dead transitions. [2024-06-03 19:43:15,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 741 transitions, 13139 flow [2024-06-03 19:43:15,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:43:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:43:15,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:43:15,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-03 19:43:15,945 INFO L175 Difference]: Start difference. First operand has 468 places, 698 transitions, 9795 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:43:15,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 741 transitions, 13139 flow [2024-06-03 19:43:23,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 741 transitions, 12549 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 19:43:23,775 INFO L231 Difference]: Finished difference. Result has 471 places, 717 transitions, 10586 flow [2024-06-03 19:43:23,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9205, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10586, PETRI_PLACES=471, PETRI_TRANSITIONS=717} [2024-06-03 19:43:23,775 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 428 predicate places. [2024-06-03 19:43:23,775 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 717 transitions, 10586 flow [2024-06-03 19:43:23,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:23,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:23,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:23,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-03 19:43:23,776 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:23,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:23,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1288897087, now seen corresponding path program 6 times [2024-06-03 19:43:23,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:23,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126998124] [2024-06-03 19:43:23,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:23,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:24,940 INFO 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 19:43:24,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:24,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126998124] [2024-06-03 19:43:24,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126998124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:24,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:24,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:43:24,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440557341] [2024-06-03 19:43:24,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:24,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:43:24,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:24,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:43:24,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:43:25,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:43:25,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 717 transitions, 10586 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:25,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:25,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:43:25,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:26,875 INFO L124 PetriNetUnfolderBase]: 3943/6009 cut-off events. [2024-06-03 19:43:26,875 INFO L125 PetriNetUnfolderBase]: For 2447007/2447015 co-relation queries the response was YES. [2024-06-03 19:43:26,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82133 conditions, 6009 events. 3943/6009 cut-off events. For 2447007/2447015 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 33919 event pairs, 621 based on Foata normal form. 3/6002 useless extension candidates. Maximal degree in co-relation 81900. Up to 5680 conditions per place. [2024-06-03 19:43:26,986 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 681 selfloop transitions, 51 changer transitions 0/736 dead transitions. [2024-06-03 19:43:26,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 736 transitions, 12207 flow [2024-06-03 19:43:26,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:43:26,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:43:26,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-03 19:43:26,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-03 19:43:26,988 INFO L175 Difference]: Start difference. First operand has 471 places, 717 transitions, 10586 flow. Second operand 9 states and 140 transitions. [2024-06-03 19:43:26,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 736 transitions, 12207 flow [2024-06-03 19:43:34,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 736 transitions, 11845 flow, removed 125 selfloop flow, removed 3 redundant places. [2024-06-03 19:43:34,334 INFO L231 Difference]: Finished difference. Result has 477 places, 720 transitions, 10445 flow [2024-06-03 19:43:34,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10224, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10445, PETRI_PLACES=477, PETRI_TRANSITIONS=720} [2024-06-03 19:43:34,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 434 predicate places. [2024-06-03 19:43:34,335 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 720 transitions, 10445 flow [2024-06-03 19:43:34,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:34,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:34,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:34,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-03 19:43:34,335 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:34,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:34,336 INFO L85 PathProgramCache]: Analyzing trace with hash 756498820, now seen corresponding path program 16 times [2024-06-03 19:43:34,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:34,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621503116] [2024-06-03 19:43:34,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:34,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:35,495 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 19:43:35,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:35,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621503116] [2024-06-03 19:43:35,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621503116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:35,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:35,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:43:35,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881044036] [2024-06-03 19:43:35,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:35,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:43:35,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:35,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:43:35,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:43:35,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:43:35,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 720 transitions, 10445 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:35,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:35,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:43:35,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:37,611 INFO L124 PetriNetUnfolderBase]: 3945/5994 cut-off events. [2024-06-03 19:43:37,611 INFO L125 PetriNetUnfolderBase]: For 2462797/2462805 co-relation queries the response was YES. [2024-06-03 19:43:37,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81525 conditions, 5994 events. 3945/5994 cut-off events. For 2462797/2462805 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 33682 event pairs, 636 based on Foata normal form. 4/5981 useless extension candidates. Maximal degree in co-relation 81290. Up to 5060 conditions per place. [2024-06-03 19:43:37,734 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 526 selfloop transitions, 217 changer transitions 0/747 dead transitions. [2024-06-03 19:43:37,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 747 transitions, 12901 flow [2024-06-03 19:43:37,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:43:37,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:43:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:43:37,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-03 19:43:37,735 INFO L175 Difference]: Start difference. First operand has 477 places, 720 transitions, 10445 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:43:37,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 747 transitions, 12901 flow [2024-06-03 19:43:45,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 747 transitions, 12721 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-03 19:43:45,937 INFO L231 Difference]: Finished difference. Result has 480 places, 725 transitions, 10929 flow [2024-06-03 19:43:45,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10265, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10929, PETRI_PLACES=480, PETRI_TRANSITIONS=725} [2024-06-03 19:43:45,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 437 predicate places. [2024-06-03 19:43:45,938 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 725 transitions, 10929 flow [2024-06-03 19:43:45,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:45,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:45,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:45,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-03 19:43:45,938 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:45,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:45,939 INFO L85 PathProgramCache]: Analyzing trace with hash 761861200, now seen corresponding path program 17 times [2024-06-03 19:43:45,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:45,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943340545] [2024-06-03 19:43:45,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:45,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:46,894 INFO 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 19:43:46,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:46,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943340545] [2024-06-03 19:43:46,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943340545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:46,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:46,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:43:46,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037032769] [2024-06-03 19:43:46,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:46,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:43:46,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:46,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:43:46,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:43:46,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:43:46,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 725 transitions, 10929 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:46,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:46,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:43:46,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:48,835 INFO L124 PetriNetUnfolderBase]: 3939/6012 cut-off events. [2024-06-03 19:43:48,836 INFO L125 PetriNetUnfolderBase]: For 2469543/2469551 co-relation queries the response was YES. [2024-06-03 19:43:48,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81880 conditions, 6012 events. 3939/6012 cut-off events. For 2469543/2469551 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 33986 event pairs, 617 based on Foata normal form. 4/6006 useless extension candidates. Maximal degree in co-relation 81643. Up to 5616 conditions per place. [2024-06-03 19:43:48,953 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 663 selfloop transitions, 77 changer transitions 0/744 dead transitions. [2024-06-03 19:43:48,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 744 transitions, 12819 flow [2024-06-03 19:43:48,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:43:48,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:43:48,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 19:43:48,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-03 19:43:48,954 INFO L175 Difference]: Start difference. First operand has 480 places, 725 transitions, 10929 flow. Second operand 9 states and 147 transitions. [2024-06-03 19:43:48,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 744 transitions, 12819 flow [2024-06-03 19:43:57,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 744 transitions, 12233 flow, removed 135 selfloop flow, removed 5 redundant places. [2024-06-03 19:43:57,167 INFO L231 Difference]: Finished difference. Result has 484 places, 725 transitions, 10503 flow [2024-06-03 19:43:57,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10343, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10503, PETRI_PLACES=484, PETRI_TRANSITIONS=725} [2024-06-03 19:43:57,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 441 predicate places. [2024-06-03 19:43:57,167 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 725 transitions, 10503 flow [2024-06-03 19:43:57,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:57,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:57,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:57,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-03 19:43:57,168 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:57,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:57,168 INFO L85 PathProgramCache]: Analyzing trace with hash 378292378, now seen corresponding path program 12 times [2024-06-03 19:43:57,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:57,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844346280] [2024-06-03 19:43:57,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:57,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:57,999 INFO 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 19:43:57,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:57,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844346280] [2024-06-03 19:43:57,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844346280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:57,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:57,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:57,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604527995] [2024-06-03 19:43:57,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:57,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:57,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:58,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:58,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:58,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:43:58,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 725 transitions, 10503 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:58,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:58,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:43:58,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:59,740 INFO L124 PetriNetUnfolderBase]: 3941/6016 cut-off events. [2024-06-03 19:43:59,741 INFO L125 PetriNetUnfolderBase]: For 2479597/2479608 co-relation queries the response was YES. [2024-06-03 19:43:59,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81064 conditions, 6016 events. 3941/6016 cut-off events. For 2479597/2479608 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 34101 event pairs, 702 based on Foata normal form. 4/6006 useless extension candidates. Maximal degree in co-relation 80826. Up to 5013 conditions per place. [2024-06-03 19:43:59,862 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 535 selfloop transitions, 204 changer transitions 0/743 dead transitions. [2024-06-03 19:43:59,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 743 transitions, 12485 flow [2024-06-03 19:43:59,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:59,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:59,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 19:43:59,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-03 19:43:59,863 INFO L175 Difference]: Start difference. First operand has 484 places, 725 transitions, 10503 flow. Second operand 8 states and 134 transitions. [2024-06-03 19:43:59,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 743 transitions, 12485 flow [2024-06-03 19:44:08,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 743 transitions, 12288 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-03 19:44:08,267 INFO L231 Difference]: Finished difference. Result has 484 places, 728 transitions, 10805 flow [2024-06-03 19:44:08,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10306, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10805, PETRI_PLACES=484, PETRI_TRANSITIONS=728} [2024-06-03 19:44:08,267 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 441 predicate places. [2024-06-03 19:44:08,267 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 728 transitions, 10805 flow [2024-06-03 19:44:08,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:08,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:08,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:08,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-03 19:44:08,268 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:08,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:08,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1599059367, now seen corresponding path program 7 times [2024-06-03 19:44:08,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:08,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650399641] [2024-06-03 19:44:08,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:08,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:09,428 INFO 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 19:44:09,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:09,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650399641] [2024-06-03 19:44:09,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650399641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:09,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:09,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:09,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591604504] [2024-06-03 19:44:09,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:09,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:09,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:09,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:09,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:09,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:44:09,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 728 transitions, 10805 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:09,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:09,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:44:09,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:11,469 INFO L124 PetriNetUnfolderBase]: 3946/6021 cut-off events. [2024-06-03 19:44:11,469 INFO L125 PetriNetUnfolderBase]: For 2495363/2495367 co-relation queries the response was YES. [2024-06-03 19:44:11,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81696 conditions, 6021 events. 3946/6021 cut-off events. For 2495363/2495367 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 34017 event pairs, 663 based on Foata normal form. 2/6021 useless extension candidates. Maximal degree in co-relation 81457. Up to 5830 conditions per place. [2024-06-03 19:44:11,584 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 722 selfloop transitions, 20 changer transitions 0/746 dead transitions. [2024-06-03 19:44:11,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 746 transitions, 12432 flow [2024-06-03 19:44:11,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:44:11,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:44:11,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-03 19:44:11,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-03 19:44:11,597 INFO L175 Difference]: Start difference. First operand has 484 places, 728 transitions, 10805 flow. Second operand 9 states and 133 transitions. [2024-06-03 19:44:11,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 746 transitions, 12432 flow [2024-06-03 19:44:21,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 746 transitions, 12082 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-03 19:44:21,745 INFO L231 Difference]: Finished difference. Result has 489 places, 732 transitions, 10618 flow [2024-06-03 19:44:21,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10455, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10618, PETRI_PLACES=489, PETRI_TRANSITIONS=732} [2024-06-03 19:44:21,746 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-03 19:44:21,746 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 732 transitions, 10618 flow [2024-06-03 19:44:21,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:21,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:21,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:21,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-03 19:44:21,747 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:21,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:21,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1301783880, now seen corresponding path program 18 times [2024-06-03 19:44:21,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:21,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406755998] [2024-06-03 19:44:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:21,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:21,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:22,817 INFO 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 19:44:22,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:22,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406755998] [2024-06-03 19:44:22,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406755998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:22,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:22,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:22,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620786509] [2024-06-03 19:44:22,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:22,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:22,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:22,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:22,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:22,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:44:22,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 732 transitions, 10618 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:22,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:22,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:44:22,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:24,643 INFO L124 PetriNetUnfolderBase]: 3940/6008 cut-off events. [2024-06-03 19:44:24,643 INFO L125 PetriNetUnfolderBase]: For 2506930/2506938 co-relation queries the response was YES. [2024-06-03 19:44:24,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80784 conditions, 6008 events. 3940/6008 cut-off events. For 2506930/2506938 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 34004 event pairs, 619 based on Foata normal form. 4/6002 useless extension candidates. Maximal degree in co-relation 80543. Up to 5621 conditions per place. [2024-06-03 19:44:24,762 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 673 selfloop transitions, 75 changer transitions 0/752 dead transitions. [2024-06-03 19:44:24,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 752 transitions, 12249 flow [2024-06-03 19:44:24,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:44:24,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:44:24,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 19:44:24,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-03 19:44:24,764 INFO L175 Difference]: Start difference. First operand has 489 places, 732 transitions, 10618 flow. Second operand 9 states and 147 transitions. [2024-06-03 19:44:24,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 752 transitions, 12249 flow [2024-06-03 19:44:34,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 752 transitions, 12008 flow, removed 98 selfloop flow, removed 6 redundant places. [2024-06-03 19:44:34,384 INFO L231 Difference]: Finished difference. Result has 492 places, 733 transitions, 10570 flow [2024-06-03 19:44:34,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10403, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10570, PETRI_PLACES=492, PETRI_TRANSITIONS=733} [2024-06-03 19:44:34,385 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 449 predicate places. [2024-06-03 19:44:34,385 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 733 transitions, 10570 flow [2024-06-03 19:44:34,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:34,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:34,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:34,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-03 19:44:34,386 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:34,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:34,387 INFO L85 PathProgramCache]: Analyzing trace with hash 383833907, now seen corresponding path program 8 times [2024-06-03 19:44:34,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:34,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739776756] [2024-06-03 19:44:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:34,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:35,382 INFO 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 19:44:35,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:35,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739776756] [2024-06-03 19:44:35,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739776756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:35,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:35,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:35,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420027994] [2024-06-03 19:44:35,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:35,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:35,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:35,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:35,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:35,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:44:35,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 733 transitions, 10570 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:35,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:35,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:44:35,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:37,424 INFO L124 PetriNetUnfolderBase]: 3966/6042 cut-off events. [2024-06-03 19:44:37,424 INFO L125 PetriNetUnfolderBase]: For 2562778/2562786 co-relation queries the response was YES. [2024-06-03 19:44:37,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81901 conditions, 6042 events. 3966/6042 cut-off events. For 2562778/2562786 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 34192 event pairs, 621 based on Foata normal form. 4/6036 useless extension candidates. Maximal degree in co-relation 81659. Up to 5655 conditions per place. [2024-06-03 19:44:37,579 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 674 selfloop transitions, 86 changer transitions 0/764 dead transitions. [2024-06-03 19:44:37,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 764 transitions, 13317 flow [2024-06-03 19:44:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:44:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:44:37,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-03 19:44:37,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-03 19:44:37,581 INFO L175 Difference]: Start difference. First operand has 492 places, 733 transitions, 10570 flow. Second operand 9 states and 149 transitions. [2024-06-03 19:44:37,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 764 transitions, 13317 flow [2024-06-03 19:44:47,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 764 transitions, 13171 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 19:44:47,306 INFO L231 Difference]: Finished difference. Result has 496 places, 744 transitions, 11119 flow [2024-06-03 19:44:47,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10424, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11119, PETRI_PLACES=496, PETRI_TRANSITIONS=744} [2024-06-03 19:44:47,306 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 453 predicate places. [2024-06-03 19:44:47,306 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 744 transitions, 11119 flow [2024-06-03 19:44:47,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:47,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:47,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:47,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-03 19:44:47,307 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:47,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:47,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1815858838, now seen corresponding path program 19 times [2024-06-03 19:44:47,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:47,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009537197] [2024-06-03 19:44:47,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:47,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:48,438 INFO 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 19:44:48,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:48,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009537197] [2024-06-03 19:44:48,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009537197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:48,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:48,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:48,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520558971] [2024-06-03 19:44:48,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:48,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:48,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:48,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:48,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:48,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:44:48,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 744 transitions, 11119 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:48,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:48,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:44:48,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:50,397 INFO L124 PetriNetUnfolderBase]: 4008/6109 cut-off events. [2024-06-03 19:44:50,398 INFO L125 PetriNetUnfolderBase]: For 2665311/2665322 co-relation queries the response was YES. [2024-06-03 19:44:50,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84215 conditions, 6109 events. 4008/6109 cut-off events. For 2665311/2665322 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 34653 event pairs, 706 based on Foata normal form. 4/6099 useless extension candidates. Maximal degree in co-relation 83971. Up to 5044 conditions per place. [2024-06-03 19:44:50,532 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 547 selfloop transitions, 219 changer transitions 0/770 dead transitions. [2024-06-03 19:44:50,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 770 transitions, 13793 flow [2024-06-03 19:44:50,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:44:50,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:44:50,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-03 19:44:50,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-03 19:44:50,534 INFO L175 Difference]: Start difference. First operand has 496 places, 744 transitions, 11119 flow. Second operand 9 states and 151 transitions. [2024-06-03 19:44:50,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 770 transitions, 13793 flow [2024-06-03 19:44:59,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 770 transitions, 13492 flow, removed 121 selfloop flow, removed 4 redundant places. [2024-06-03 19:45:00,010 INFO L231 Difference]: Finished difference. Result has 502 places, 753 transitions, 11663 flow [2024-06-03 19:45:00,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10818, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11663, PETRI_PLACES=502, PETRI_TRANSITIONS=753} [2024-06-03 19:45:00,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 459 predicate places. [2024-06-03 19:45:00,016 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 753 transitions, 11663 flow [2024-06-03 19:45:00,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:00,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:00,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:00,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-03 19:45:00,017 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:00,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:00,017 INFO L85 PathProgramCache]: Analyzing trace with hash -833611354, now seen corresponding path program 20 times [2024-06-03 19:45:00,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:00,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524082144] [2024-06-03 19:45:00,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:00,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:01,128 INFO 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 19:45:01,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:01,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524082144] [2024-06-03 19:45:01,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524082144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:01,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:01,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:01,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990380899] [2024-06-03 19:45:01,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:01,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:01,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:01,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:01,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:01,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:45:01,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 753 transitions, 11663 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:01,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:01,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:45:01,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:03,148 INFO L124 PetriNetUnfolderBase]: 4018/6123 cut-off events. [2024-06-03 19:45:03,149 INFO L125 PetriNetUnfolderBase]: For 2709693/2709704 co-relation queries the response was YES. [2024-06-03 19:45:03,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85697 conditions, 6123 events. 4018/6123 cut-off events. For 2709693/2709704 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34757 event pairs, 710 based on Foata normal form. 4/6113 useless extension candidates. Maximal degree in co-relation 85450. Up to 5112 conditions per place. [2024-06-03 19:45:03,281 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 558 selfloop transitions, 210 changer transitions 0/772 dead transitions. [2024-06-03 19:45:03,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 772 transitions, 13802 flow [2024-06-03 19:45:03,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:03,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:03,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-03 19:45:03,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-03 19:45:03,282 INFO L175 Difference]: Start difference. First operand has 502 places, 753 transitions, 11663 flow. Second operand 9 states and 148 transitions. [2024-06-03 19:45:03,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 772 transitions, 13802 flow [2024-06-03 19:45:12,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 772 transitions, 13261 flow, removed 139 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:12,988 INFO L231 Difference]: Finished difference. Result has 506 places, 756 transitions, 11725 flow [2024-06-03 19:45:12,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11174, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11725, PETRI_PLACES=506, PETRI_TRANSITIONS=756} [2024-06-03 19:45:12,988 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 463 predicate places. [2024-06-03 19:45:12,988 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 756 transitions, 11725 flow [2024-06-03 19:45:12,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:12,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:12,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:12,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-03 19:45:12,989 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:12,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:12,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1360674440, now seen corresponding path program 21 times [2024-06-03 19:45:12,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:12,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797337230] [2024-06-03 19:45:12,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:12,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:13,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:14,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:14,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797337230] [2024-06-03 19:45:14,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797337230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:14,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:14,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:14,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288435114] [2024-06-03 19:45:14,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:14,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:14,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:14,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:14,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:14,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:45:14,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 756 transitions, 11725 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:14,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:14,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:45:14,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:16,309 INFO L124 PetriNetUnfolderBase]: 4076/6199 cut-off events. [2024-06-03 19:45:16,309 INFO L125 PetriNetUnfolderBase]: For 2832878/2832892 co-relation queries the response was YES. [2024-06-03 19:45:16,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88573 conditions, 6199 events. 4076/6199 cut-off events. For 2832878/2832892 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 35067 event pairs, 652 based on Foata normal form. 8/6195 useless extension candidates. Maximal degree in co-relation 88324. Up to 5734 conditions per place. [2024-06-03 19:45:16,432 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 688 selfloop transitions, 93 changer transitions 0/785 dead transitions. [2024-06-03 19:45:16,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 785 transitions, 14611 flow [2024-06-03 19:45:16,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:16,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 19:45:16,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-03 19:45:16,434 INFO L175 Difference]: Start difference. First operand has 506 places, 756 transitions, 11725 flow. Second operand 9 states and 147 transitions. [2024-06-03 19:45:16,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 785 transitions, 14611 flow [2024-06-03 19:45:25,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 785 transitions, 14091 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-03 19:45:25,524 INFO L231 Difference]: Finished difference. Result has 509 places, 768 transitions, 11991 flow [2024-06-03 19:45:25,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11205, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11991, PETRI_PLACES=509, PETRI_TRANSITIONS=768} [2024-06-03 19:45:25,524 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 466 predicate places. [2024-06-03 19:45:25,524 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 768 transitions, 11991 flow [2024-06-03 19:45:25,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:25,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:25,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:25,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-03 19:45:25,525 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:25,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:25,526 INFO L85 PathProgramCache]: Analyzing trace with hash -2037072828, now seen corresponding path program 22 times [2024-06-03 19:45:25,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:25,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590998821] [2024-06-03 19:45:25,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:25,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:26,560 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 19:45:26,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:26,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590998821] [2024-06-03 19:45:26,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590998821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:26,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:26,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:26,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859185917] [2024-06-03 19:45:26,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:26,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:26,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:26,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:26,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:26,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:45:26,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 768 transitions, 11991 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:26,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:26,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:45:26,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:28,571 INFO L124 PetriNetUnfolderBase]: 4080/6209 cut-off events. [2024-06-03 19:45:28,571 INFO L125 PetriNetUnfolderBase]: For 2872541/2872552 co-relation queries the response was YES. [2024-06-03 19:45:28,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88575 conditions, 6209 events. 4080/6209 cut-off events. For 2872541/2872552 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 35308 event pairs, 704 based on Foata normal form. 6/6201 useless extension candidates. Maximal degree in co-relation 88324. Up to 5190 conditions per place. [2024-06-03 19:45:28,703 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 579 selfloop transitions, 205 changer transitions 0/788 dead transitions. [2024-06-03 19:45:28,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 788 transitions, 14464 flow [2024-06-03 19:45:28,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:28,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:28,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-03 19:45:28,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-03 19:45:28,705 INFO L175 Difference]: Start difference. First operand has 509 places, 768 transitions, 11991 flow. Second operand 9 states and 151 transitions. [2024-06-03 19:45:28,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 788 transitions, 14464 flow [2024-06-03 19:45:38,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 788 transitions, 14099 flow, removed 140 selfloop flow, removed 4 redundant places. [2024-06-03 19:45:38,611 INFO L231 Difference]: Finished difference. Result has 514 places, 771 transitions, 12174 flow [2024-06-03 19:45:38,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11626, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12174, PETRI_PLACES=514, PETRI_TRANSITIONS=771} [2024-06-03 19:45:38,612 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 471 predicate places. [2024-06-03 19:45:38,612 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 771 transitions, 12174 flow [2024-06-03 19:45:38,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:38,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:38,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:38,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-03 19:45:38,612 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:38,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:38,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2037067248, now seen corresponding path program 23 times [2024-06-03 19:45:38,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:38,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305005929] [2024-06-03 19:45:38,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:38,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:39,779 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 19:45:39,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:39,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305005929] [2024-06-03 19:45:39,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305005929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:39,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:39,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:39,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824461072] [2024-06-03 19:45:39,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:39,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:39,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:39,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:39,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:39,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:45:39,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 771 transitions, 12174 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:39,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:39,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:45:39,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:41,930 INFO L124 PetriNetUnfolderBase]: 4084/6213 cut-off events. [2024-06-03 19:45:41,931 INFO L125 PetriNetUnfolderBase]: For 2865638/2865652 co-relation queries the response was YES. [2024-06-03 19:45:42,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88636 conditions, 6213 events. 4084/6213 cut-off events. For 2865638/2865652 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 35263 event pairs, 656 based on Foata normal form. 10/6211 useless extension candidates. Maximal degree in co-relation 88383. Up to 5804 conditions per place. [2024-06-03 19:45:42,062 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 714 selfloop transitions, 69 changer transitions 0/787 dead transitions. [2024-06-03 19:45:42,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 787 transitions, 13919 flow [2024-06-03 19:45:42,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-03 19:45:42,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-03 19:45:42,066 INFO L175 Difference]: Start difference. First operand has 514 places, 771 transitions, 12174 flow. Second operand 9 states and 142 transitions. [2024-06-03 19:45:42,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 787 transitions, 13919 flow Killed by 15