./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe002_power.opt_pso.oepc_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe002_power.opt_pso.oepc_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe002_power.opt_pso.oepc_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe002_power.opt_pso.oepc_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:46:46,966 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:46:47,035 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:46:47,039 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:46:47,040 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:46:47,068 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:46:47,069 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:46:47,070 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:46:47,071 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:46:47,074 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:46:47,074 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:46:47,075 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:46:47,076 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:46:47,077 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:46:47,077 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:46:47,077 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:46:47,078 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:46:47,078 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:46:47,078 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:46:47,078 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:46:47,079 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:46:47,079 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:46:47,079 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:46:47,079 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:46:47,080 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:46:47,080 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:46:47,080 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:46:47,081 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:46:47,081 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:46:47,081 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:46:47,082 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:46:47,082 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:46:47,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:46:47,083 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:46:47,083 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:46:47,083 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:46:47,083 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:46:47,084 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:46:47,084 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:46:47,084 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:46:47,084 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:46:47,085 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:46:47,085 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:46:47,085 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:46:47,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:46:47,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:46:47,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:46:47,335 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:46:47,335 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:46:47,337 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe002_power.opt_pso.oepc_pso.opt_rmo.opt.i [2024-06-20 16:46:48,412 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:46:48,662 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:46:48,664 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe002_power.opt_pso.oepc_pso.opt_rmo.opt.i [2024-06-20 16:46:48,681 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4af1011a/7adf6115a9224706ad5dbe9bb8859329/FLAG9a0df663b [2024-06-20 16:46:48,698 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4af1011a/7adf6115a9224706ad5dbe9bb8859329 [2024-06-20 16:46:48,700 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:46:48,701 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:46:48,703 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe002_power.opt_pso.oepc_pso.opt_rmo.opt.yml/witness.yml [2024-06-20 16:46:48,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:46:48,897 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:46:48,899 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:46:48,899 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:46:48,903 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:46:48,904 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:46:48" (1/2) ... [2024-06-20 16:46:48,905 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e25d089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:46:48, skipping insertion in model container [2024-06-20 16:46:48,905 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:46:48" (1/2) ... [2024-06-20 16:46:48,907 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@182785da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:46:48, skipping insertion in model container [2024-06-20 16:46:48,907 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:46:48" (2/2) ... [2024-06-20 16:46:48,908 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e25d089 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:46:48, skipping insertion in model container [2024-06-20 16:46:48,908 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:46:48" (2/2) ... [2024-06-20 16:46:48,909 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:46:49,004 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:46:49,005 INFO L97 edCorrectnessWitness]: Location invariant before [L835-L835] (((((((((((((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! 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 || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-20 16:46:49,006 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] (((((((((((((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-20 16:46:49,006 INFO L97 edCorrectnessWitness]: Location invariant before [L832-L832] (((((((((((((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! 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 || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-20 16:46:49,006 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:46:49,006 INFO L106 edCorrectnessWitness]: ghost_update [L830-L830] multithreaded = 1; [2024-06-20 16:46:49,057 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:46:49,459 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:46:49,476 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:46:49,624 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:46:49,670 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:46:49,671 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:46:49 WrapperNode [2024-06-20 16:46:49,671 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:46:49,672 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:46:49,672 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:46:49,672 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:46:49,679 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:46:49" (1/1) ... [2024-06-20 16:46:49,728 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:46:49" (1/1) ... [2024-06-20 16:46:49,788 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-20 16:46:49,791 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:46:49,792 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:46:49,793 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:46:49,793 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:46:49,804 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:46:49" (1/1) ... [2024-06-20 16:46:49,804 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:46:49" (1/1) ... [2024-06-20 16:46:49,817 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:46:49" (1/1) ... [2024-06-20 16:46:49,838 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]. [2024-06-20 16:46:49,847 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:46:49" (1/1) ... [2024-06-20 16:46:49,847 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:46:49" (1/1) ... [2024-06-20 16:46:49,856 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:46:49" (1/1) ... [2024-06-20 16:46:49,868 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:46:49" (1/1) ... [2024-06-20 16:46:49,870 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:46:49" (1/1) ... [2024-06-20 16:46:49,871 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:46:49" (1/1) ... [2024-06-20 16:46:49,874 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:46:49,875 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:46:49,875 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:46:49,875 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:46:49,876 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:46:49" (1/1) ... [2024-06-20 16:46:49,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:46:49,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:46:49,913 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) [2024-06-20 16:46:49,937 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 [2024-06-20 16:46:49,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:46:49,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:46:49,952 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:46:49,953 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:46:49,953 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:46:49,953 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:46:49,953 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:46:49,954 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:46:49,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:46:49,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:46:49,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:46:49,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:46:49,956 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:46:50,124 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:46:50,127 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:46:50,513 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:46:50,513 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:46:50,684 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:46:50,685 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:46:50,685 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:46:50 BoogieIcfgContainer [2024-06-20 16:46:50,686 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:46:50,689 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:46:50,689 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:46:50,692 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:46:50,692 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:46:48" (1/4) ... [2024-06-20 16:46:50,693 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33810cb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:46:50, skipping insertion in model container [2024-06-20 16:46:50,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:46:48" (2/4) ... [2024-06-20 16:46:50,694 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33810cb7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:46:50, skipping insertion in model container [2024-06-20 16:46:50,694 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:46:49" (3/4) ... [2024-06-20 16:46:50,694 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33810cb7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:46:50, skipping insertion in model container [2024-06-20 16:46:50,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:46:50" (4/4) ... [2024-06-20 16:46:50,696 INFO L112 eAbstractionObserver]: Analyzing ICFG safe002_power.opt_pso.oepc_pso.opt_rmo.opt.i [2024-06-20 16:46:50,711 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:46:50,711 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 16:46:50,711 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:46:50,758 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:46:50,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 16:46:50,817 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-20 16:46:50,817 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:46:50,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:46:50,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 16:46:50,823 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-20 16:46:50,834 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:46:50,861 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;@63c06334, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:46:50,862 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 16:46:50,866 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:46:50,866 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:46:50,866 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:46:50,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:50,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:46:50,868 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)] === [2024-06-20 16:46:50,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:50,873 INFO L85 PathProgramCache]: Analyzing trace with hash 362302094, now seen corresponding path program 1 times [2024-06-20 16:46:50,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:50,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935948110] [2024-06-20 16:46:50,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:50,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:51,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:52,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:52,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935948110] [2024-06-20 16:46:52,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935948110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:52,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:52,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:46:52,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165969602] [2024-06-20 16:46:52,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:52,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:46:52,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:52,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:46:52,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:46:52,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 16:46:52,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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) [2024-06-20 16:46:52,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:52,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 16:46:52,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:52,529 INFO L124 PetriNetUnfolderBase]: 891/1368 cut-off events. [2024-06-20 16:46:52,529 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-06-20 16:46:52,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2789 conditions, 1368 events. 891/1368 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6418 event pairs, 463 based on Foata normal form. 2/1341 useless extension candidates. Maximal degree in co-relation 2777. Up to 1335 conditions per place. [2024-06-20 16:46:52,545 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 31 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-20 16:46:52,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 169 flow [2024-06-20 16:46:52,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:46:52,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:46:52,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-20 16:46:52,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-20 16:46:52,559 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 77 transitions. [2024-06-20 16:46:52,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 169 flow [2024-06-20 16:46:52,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 16:46:52,564 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-20 16:46:52,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-20 16:46:52,569 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-20 16:46:52,569 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-20 16:46:52,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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) [2024-06-20 16:46:52,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:52,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:52,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:46:52,570 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)] === [2024-06-20 16:46:52,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:52,571 INFO L85 PathProgramCache]: Analyzing trace with hash 383754188, now seen corresponding path program 1 times [2024-06-20 16:46:52,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:52,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148088297] [2024-06-20 16:46:52,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:52,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:53,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:53,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148088297] [2024-06-20 16:46:53,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148088297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:53,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:53,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:46:53,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014266718] [2024-06-20 16:46:53,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:53,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:46:53,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:53,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:46:53,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:46:54,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-20 16:46:54,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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) [2024-06-20 16:46:54,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:54,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-20 16:46:54,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:54,555 INFO L124 PetriNetUnfolderBase]: 1131/1721 cut-off events. [2024-06-20 16:46:54,556 INFO L125 PetriNetUnfolderBase]: For 339/353 co-relation queries the response was YES. [2024-06-20 16:46:54,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3989 conditions, 1721 events. 1131/1721 cut-off events. For 339/353 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7884 event pairs, 409 based on Foata normal form. 13/1730 useless extension candidates. Maximal degree in co-relation 3977. Up to 1639 conditions per place. [2024-06-20 16:46:54,566 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 37 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-06-20 16:46:54,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 222 flow [2024-06-20 16:46:54,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:46:54,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:46:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-20 16:46:54,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 16:46:54,571 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 94 transitions. [2024-06-20 16:46:54,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 222 flow [2024-06-20 16:46:54,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:46:54,574 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 121 flow [2024-06-20 16:46:54,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-06-20 16:46:54,575 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-06-20 16:46:54,575 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 121 flow [2024-06-20 16:46:54,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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) [2024-06-20 16:46:54,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:54,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:54,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:46:54,578 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:54,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:54,581 INFO L85 PathProgramCache]: Analyzing trace with hash -113496575, now seen corresponding path program 1 times [2024-06-20 16:46:54,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:54,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62357704] [2024-06-20 16:46:54,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:54,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:55,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:55,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62357704] [2024-06-20 16:46:55,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62357704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:55,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:55,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:46:55,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181646449] [2024-06-20 16:46:55,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:55,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:46:55,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:55,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:46:55,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:46:55,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-20 16:46:55,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 121 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:55,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:55,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-20 16:46:55,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:55,701 INFO L124 PetriNetUnfolderBase]: 888/1371 cut-off events. [2024-06-20 16:46:55,701 INFO L125 PetriNetUnfolderBase]: For 720/723 co-relation queries the response was YES. [2024-06-20 16:46:55,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3475 conditions, 1371 events. 888/1371 cut-off events. For 720/723 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6342 event pairs, 408 based on Foata normal form. 6/1375 useless extension candidates. Maximal degree in co-relation 3460. Up to 1326 conditions per place. [2024-06-20 16:46:55,710 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 39 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2024-06-20 16:46:55,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 271 flow [2024-06-20 16:46:55,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:46:55,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:46:55,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-20 16:46:55,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495 [2024-06-20 16:46:55,712 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 121 flow. Second operand 5 states and 99 transitions. [2024-06-20 16:46:55,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 271 flow [2024-06-20 16:46:55,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 254 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 16:46:55,715 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 170 flow [2024-06-20 16:46:55,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-06-20 16:46:55,716 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2024-06-20 16:46:55,716 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 170 flow [2024-06-20 16:46:55,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:55,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:55,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:55,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:46:55,717 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:55,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:55,717 INFO L85 PathProgramCache]: Analyzing trace with hash 768531133, now seen corresponding path program 1 times [2024-06-20 16:46:55,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:55,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107147394] [2024-06-20 16:46:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:55,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:56,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:56,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107147394] [2024-06-20 16:46:56,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107147394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:56,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:56,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:46:56,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992973646] [2024-06-20 16:46:56,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:56,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:46:56,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:56,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:46:56,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:46:56,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:46:56,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 170 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:56,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:56,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:46:56,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:56,992 INFO L124 PetriNetUnfolderBase]: 1319/1996 cut-off events. [2024-06-20 16:46:56,992 INFO L125 PetriNetUnfolderBase]: For 1821/1821 co-relation queries the response was YES. [2024-06-20 16:46:56,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5618 conditions, 1996 events. 1319/1996 cut-off events. For 1821/1821 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9232 event pairs, 564 based on Foata normal form. 2/1997 useless extension candidates. Maximal degree in co-relation 5600. Up to 1953 conditions per place. [2024-06-20 16:46:57,007 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 50 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-06-20 16:46:57,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 357 flow [2024-06-20 16:46:57,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:46:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:46:57,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-20 16:46:57,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-20 16:46:57,010 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 170 flow. Second operand 6 states and 106 transitions. [2024-06-20 16:46:57,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 357 flow [2024-06-20 16:46:57,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 342 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 16:46:57,014 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 230 flow [2024-06-20 16:46:57,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-06-20 16:46:57,015 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-06-20 16:46:57,015 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 230 flow [2024-06-20 16:46:57,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:57,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:57,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:57,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:46:57,016 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)] === [2024-06-20 16:46:57,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:57,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1945337390, now seen corresponding path program 1 times [2024-06-20 16:46:57,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:57,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060765183] [2024-06-20 16:46:57,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:57,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:58,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:58,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060765183] [2024-06-20 16:46:58,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060765183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:58,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:58,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:46:58,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123152102] [2024-06-20 16:46:58,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:58,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:46:58,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:58,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:46:58,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:46:58,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:46:58,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 230 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:58,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:58,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:46:58,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:58,520 INFO L124 PetriNetUnfolderBase]: 1314/1989 cut-off events. [2024-06-20 16:46:58,520 INFO L125 PetriNetUnfolderBase]: For 2745/2745 co-relation queries the response was YES. [2024-06-20 16:46:58,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6110 conditions, 1989 events. 1314/1989 cut-off events. For 2745/2745 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9211 event pairs, 546 based on Foata normal form. 2/1990 useless extension candidates. Maximal degree in co-relation 6088. Up to 1937 conditions per place. [2024-06-20 16:46:58,534 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 54 selfloop transitions, 14 changer transitions 0/72 dead transitions. [2024-06-20 16:46:58,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 424 flow [2024-06-20 16:46:58,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:46:58,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:46:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 16:46:58,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-20 16:46:58,538 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 230 flow. Second operand 7 states and 122 transitions. [2024-06-20 16:46:58,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 424 flow [2024-06-20 16:46:58,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:46:58,548 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 280 flow [2024-06-20 16:46:58,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=280, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-06-20 16:46:58,551 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-20 16:46:58,551 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 280 flow [2024-06-20 16:46:58,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:58,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:58,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:58,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:46:58,553 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)] === [2024-06-20 16:46:58,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:58,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1258998764, now seen corresponding path program 1 times [2024-06-20 16:46:58,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:58,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887639152] [2024-06-20 16:46:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:58,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:59,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:59,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887639152] [2024-06-20 16:46:59,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887639152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:59,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:59,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:46:59,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604811837] [2024-06-20 16:46:59,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:59,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:46:59,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:59,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:46:59,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:46:59,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:46:59,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 280 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:59,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:59,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:46:59,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:00,194 INFO L124 PetriNetUnfolderBase]: 1272/1944 cut-off events. [2024-06-20 16:47:00,194 INFO L125 PetriNetUnfolderBase]: For 4197/4231 co-relation queries the response was YES. [2024-06-20 16:47:00,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6530 conditions, 1944 events. 1272/1944 cut-off events. For 4197/4231 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9187 event pairs, 484 based on Foata normal form. 20/1923 useless extension candidates. Maximal degree in co-relation 6505. Up to 1790 conditions per place. [2024-06-20 16:47:00,208 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 46 selfloop transitions, 15 changer transitions 0/70 dead transitions. [2024-06-20 16:47:00,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 464 flow [2024-06-20 16:47:00,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:47:00,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:47:00,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-20 16:47:00,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-06-20 16:47:00,216 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 280 flow. Second operand 5 states and 98 transitions. [2024-06-20 16:47:00,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 464 flow [2024-06-20 16:47:00,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 70 transitions, 436 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 16:47:00,221 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 320 flow [2024-06-20 16:47:00,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-20 16:47:00,224 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-20 16:47:00,224 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 320 flow [2024-06-20 16:47:00,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:00,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:00,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:00,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:47:00,225 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)] === [2024-06-20 16:47:00,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:00,226 INFO L85 PathProgramCache]: Analyzing trace with hash -2126637698, now seen corresponding path program 1 times [2024-06-20 16:47:00,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:00,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99398546] [2024-06-20 16:47:00,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:00,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:01,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:01,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99398546] [2024-06-20 16:47:01,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99398546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:01,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:01,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:47:01,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434884499] [2024-06-20 16:47:01,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:01,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:47:01,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:01,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:47:01,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:47:01,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:01,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 320 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:01,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:01,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:01,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:01,682 INFO L124 PetriNetUnfolderBase]: 1526/2298 cut-off events. [2024-06-20 16:47:01,682 INFO L125 PetriNetUnfolderBase]: For 5795/5797 co-relation queries the response was YES. [2024-06-20 16:47:01,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8221 conditions, 2298 events. 1526/2298 cut-off events. For 5795/5797 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10715 event pairs, 522 based on Foata normal form. 15/2311 useless extension candidates. Maximal degree in co-relation 8195. Up to 2041 conditions per place. [2024-06-20 16:47:01,703 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 65 selfloop transitions, 30 changer transitions 0/99 dead transitions. [2024-06-20 16:47:01,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 99 transitions, 711 flow [2024-06-20 16:47:01,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:47:01,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:47:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-20 16:47:01,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-20 16:47:01,705 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 320 flow. Second operand 7 states and 135 transitions. [2024-06-20 16:47:01,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 99 transitions, 711 flow [2024-06-20 16:47:01,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 99 transitions, 660 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-20 16:47:01,714 INFO L231 Difference]: Finished difference. Result has 65 places, 75 transitions, 506 flow [2024-06-20 16:47:01,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=506, PETRI_PLACES=65, PETRI_TRANSITIONS=75} [2024-06-20 16:47:01,715 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-20 16:47:01,715 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 75 transitions, 506 flow [2024-06-20 16:47:01,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:01,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:01,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:01,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:47:01,716 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)] === [2024-06-20 16:47:01,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:01,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1036225552, now seen corresponding path program 2 times [2024-06-20 16:47:01,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:01,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682558916] [2024-06-20 16:47:01,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:01,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:02,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:02,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682558916] [2024-06-20 16:47:02,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682558916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:02,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:02,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:47:02,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773314199] [2024-06-20 16:47:02,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:02,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:47:02,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:02,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:47:02,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:47:02,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:02,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 75 transitions, 506 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:02,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:02,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:02,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:03,234 INFO L124 PetriNetUnfolderBase]: 1660/2486 cut-off events. [2024-06-20 16:47:03,234 INFO L125 PetriNetUnfolderBase]: For 7806/7808 co-relation queries the response was YES. [2024-06-20 16:47:03,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10083 conditions, 2486 events. 1660/2486 cut-off events. For 7806/7808 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11592 event pairs, 481 based on Foata normal form. 12/2496 useless extension candidates. Maximal degree in co-relation 10054. Up to 2243 conditions per place. [2024-06-20 16:47:03,257 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 87 selfloop transitions, 27 changer transitions 0/118 dead transitions. [2024-06-20 16:47:03,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 118 transitions, 953 flow [2024-06-20 16:47:03,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:47:03,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:47:03,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 16:47:03,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-20 16:47:03,259 INFO L175 Difference]: Start difference. First operand has 65 places, 75 transitions, 506 flow. Second operand 8 states and 150 transitions. [2024-06-20 16:47:03,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 118 transitions, 953 flow [2024-06-20 16:47:03,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 118 transitions, 924 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 16:47:03,270 INFO L231 Difference]: Finished difference. Result has 73 places, 89 transitions, 678 flow [2024-06-20 16:47:03,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=678, PETRI_PLACES=73, PETRI_TRANSITIONS=89} [2024-06-20 16:47:03,272 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-20 16:47:03,272 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 89 transitions, 678 flow [2024-06-20 16:47:03,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:03,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:03,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:03,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:47:03,273 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)] === [2024-06-20 16:47:03,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:03,273 INFO L85 PathProgramCache]: Analyzing trace with hash -175924580, now seen corresponding path program 3 times [2024-06-20 16:47:03,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:03,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985093310] [2024-06-20 16:47:03,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:03,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:04,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:04,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985093310] [2024-06-20 16:47:04,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985093310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:04,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:04,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:47:04,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875878173] [2024-06-20 16:47:04,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:04,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:47:04,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:04,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:47:04,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:47:04,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:04,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 89 transitions, 678 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:04,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:04,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:04,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:04,693 INFO L124 PetriNetUnfolderBase]: 1666/2498 cut-off events. [2024-06-20 16:47:04,694 INFO L125 PetriNetUnfolderBase]: For 10727/10729 co-relation queries the response was YES. [2024-06-20 16:47:04,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11248 conditions, 2498 events. 1666/2498 cut-off events. For 10727/10729 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11609 event pairs, 556 based on Foata normal form. 6/2502 useless extension candidates. Maximal degree in co-relation 11215. Up to 2326 conditions per place. [2024-06-20 16:47:04,711 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 95 selfloop transitions, 27 changer transitions 0/126 dead transitions. [2024-06-20 16:47:04,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 126 transitions, 1146 flow [2024-06-20 16:47:04,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:47:04,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:47:04,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 16:47:04,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-20 16:47:04,713 INFO L175 Difference]: Start difference. First operand has 73 places, 89 transitions, 678 flow. Second operand 7 states and 128 transitions. [2024-06-20 16:47:04,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 126 transitions, 1146 flow [2024-06-20 16:47:04,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 126 transitions, 1075 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-20 16:47:04,728 INFO L231 Difference]: Finished difference. Result has 80 places, 104 transitions, 881 flow [2024-06-20 16:47:04,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=881, PETRI_PLACES=80, PETRI_TRANSITIONS=104} [2024-06-20 16:47:04,729 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-20 16:47:04,729 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 104 transitions, 881 flow [2024-06-20 16:47:04,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:04,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:04,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:04,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:47:04,730 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)] === [2024-06-20 16:47:04,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:04,730 INFO L85 PathProgramCache]: Analyzing trace with hash -175915652, now seen corresponding path program 1 times [2024-06-20 16:47:04,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:04,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350903790] [2024-06-20 16:47:04,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:04,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:05,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:05,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350903790] [2024-06-20 16:47:05,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350903790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:05,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:05,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:47:05,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902829091] [2024-06-20 16:47:05,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:05,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:47:05,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:05,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:47:05,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:47:05,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:05,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 104 transitions, 881 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:05,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:05,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:05,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:06,531 INFO L124 PetriNetUnfolderBase]: 1658/2489 cut-off events. [2024-06-20 16:47:06,531 INFO L125 PetriNetUnfolderBase]: For 13116/13116 co-relation queries the response was YES. [2024-06-20 16:47:06,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11803 conditions, 2489 events. 1658/2489 cut-off events. For 13116/13116 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11562 event pairs, 564 based on Foata normal form. 4/2492 useless extension candidates. Maximal degree in co-relation 11765. Up to 2402 conditions per place. [2024-06-20 16:47:06,551 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 110 selfloop transitions, 16 changer transitions 0/130 dead transitions. [2024-06-20 16:47:06,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 130 transitions, 1217 flow [2024-06-20 16:47:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:47:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:47:06,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:47:06,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-20 16:47:06,554 INFO L175 Difference]: Start difference. First operand has 80 places, 104 transitions, 881 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:47:06,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 130 transitions, 1217 flow [2024-06-20 16:47:06,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 130 transitions, 1171 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-20 16:47:06,573 INFO L231 Difference]: Finished difference. Result has 87 places, 106 transitions, 902 flow [2024-06-20 16:47:06,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=902, PETRI_PLACES=87, PETRI_TRANSITIONS=106} [2024-06-20 16:47:06,575 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 46 predicate places. [2024-06-20 16:47:06,577 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 106 transitions, 902 flow [2024-06-20 16:47:06,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:06,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:06,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:06,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:47:06,578 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)] === [2024-06-20 16:47:06,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:06,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1365496808, now seen corresponding path program 1 times [2024-06-20 16:47:06,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:06,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889881008] [2024-06-20 16:47:06,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:06,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:07,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:07,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889881008] [2024-06-20 16:47:07,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889881008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:07,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:07,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:47:07,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139610865] [2024-06-20 16:47:07,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:07,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:47:07,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:07,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:47:07,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:47:07,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:07,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 106 transitions, 902 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:07,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:07,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:07,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:08,397 INFO L124 PetriNetUnfolderBase]: 1717/2573 cut-off events. [2024-06-20 16:47:08,397 INFO L125 PetriNetUnfolderBase]: For 15441/15441 co-relation queries the response was YES. [2024-06-20 16:47:08,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12536 conditions, 2573 events. 1717/2573 cut-off events. For 15441/15441 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12080 event pairs, 499 based on Foata normal form. 5/2574 useless extension candidates. Maximal degree in co-relation 12495. Up to 2225 conditions per place. [2024-06-20 16:47:08,417 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 90 selfloop transitions, 52 changer transitions 0/146 dead transitions. [2024-06-20 16:47:08,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 146 transitions, 1460 flow [2024-06-20 16:47:08,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:47:08,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:47:08,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-20 16:47:08,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48928571428571427 [2024-06-20 16:47:08,419 INFO L175 Difference]: Start difference. First operand has 87 places, 106 transitions, 902 flow. Second operand 7 states and 137 transitions. [2024-06-20 16:47:08,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 146 transitions, 1460 flow [2024-06-20 16:47:08,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 146 transitions, 1405 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 16:47:08,439 INFO L231 Difference]: Finished difference. Result has 90 places, 121 transitions, 1180 flow [2024-06-20 16:47:08,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1180, PETRI_PLACES=90, PETRI_TRANSITIONS=121} [2024-06-20 16:47:08,440 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-06-20 16:47:08,440 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 121 transitions, 1180 flow [2024-06-20 16:47:08,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:08,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:08,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:08,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:47:08,441 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)] === [2024-06-20 16:47:08,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:08,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1251907265, now seen corresponding path program 1 times [2024-06-20 16:47:08,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:08,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847103915] [2024-06-20 16:47:08,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:08,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:09,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:09,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847103915] [2024-06-20 16:47:09,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847103915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:09,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:09,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:47:09,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685673152] [2024-06-20 16:47:09,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:09,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:47:09,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:09,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:47:09,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:47:09,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:09,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 121 transitions, 1180 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:09,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:09,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:09,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:10,135 INFO L124 PetriNetUnfolderBase]: 1796/2692 cut-off events. [2024-06-20 16:47:10,135 INFO L125 PetriNetUnfolderBase]: For 20663/20670 co-relation queries the response was YES. [2024-06-20 16:47:10,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14533 conditions, 2692 events. 1796/2692 cut-off events. For 20663/20670 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12686 event pairs, 518 based on Foata normal form. 19/2709 useless extension candidates. Maximal degree in co-relation 14489. Up to 2352 conditions per place. [2024-06-20 16:47:10,154 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 105 selfloop transitions, 47 changer transitions 0/156 dead transitions. [2024-06-20 16:47:10,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 156 transitions, 1694 flow [2024-06-20 16:47:10,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:47:10,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:47:10,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 16:47:10,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-20 16:47:10,156 INFO L175 Difference]: Start difference. First operand has 90 places, 121 transitions, 1180 flow. Second operand 8 states and 156 transitions. [2024-06-20 16:47:10,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 156 transitions, 1694 flow [2024-06-20 16:47:10,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 156 transitions, 1650 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-20 16:47:10,185 INFO L231 Difference]: Finished difference. Result has 96 places, 128 transitions, 1339 flow [2024-06-20 16:47:10,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1339, PETRI_PLACES=96, PETRI_TRANSITIONS=128} [2024-06-20 16:47:10,186 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-06-20 16:47:10,186 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 128 transitions, 1339 flow [2024-06-20 16:47:10,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:10,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:10,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:10,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:47:10,187 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)] === [2024-06-20 16:47:10,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:10,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2058219777, now seen corresponding path program 2 times [2024-06-20 16:47:10,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:10,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464996758] [2024-06-20 16:47:10,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:10,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:11,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:11,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464996758] [2024-06-20 16:47:11,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464996758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:11,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:11,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:47:11,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202118591] [2024-06-20 16:47:11,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:11,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:47:11,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:11,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:47:11,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:47:11,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:11,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 128 transitions, 1339 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:11,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:11,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:11,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:11,888 INFO L124 PetriNetUnfolderBase]: 1826/2735 cut-off events. [2024-06-20 16:47:11,888 INFO L125 PetriNetUnfolderBase]: For 25029/25036 co-relation queries the response was YES. [2024-06-20 16:47:11,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15958 conditions, 2735 events. 1826/2735 cut-off events. For 25029/25036 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12866 event pairs, 508 based on Foata normal form. 11/2744 useless extension candidates. Maximal degree in co-relation 15912. Up to 2552 conditions per place. [2024-06-20 16:47:11,911 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 142 selfloop transitions, 36 changer transitions 0/182 dead transitions. [2024-06-20 16:47:11,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 182 transitions, 2065 flow [2024-06-20 16:47:11,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:47:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:47:11,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 16:47:11,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 16:47:11,913 INFO L175 Difference]: Start difference. First operand has 96 places, 128 transitions, 1339 flow. Second operand 9 states and 165 transitions. [2024-06-20 16:47:11,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 182 transitions, 2065 flow [2024-06-20 16:47:11,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 182 transitions, 1922 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 16:47:11,997 INFO L231 Difference]: Finished difference. Result has 103 places, 152 transitions, 1599 flow [2024-06-20 16:47:11,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1599, PETRI_PLACES=103, PETRI_TRANSITIONS=152} [2024-06-20 16:47:11,999 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2024-06-20 16:47:11,999 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 152 transitions, 1599 flow [2024-06-20 16:47:12,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:12,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:12,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:12,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:47:12,000 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:12,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:12,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2050868127, now seen corresponding path program 3 times [2024-06-20 16:47:12,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:12,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070079658] [2024-06-20 16:47:12,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:12,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:12,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:12,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070079658] [2024-06-20 16:47:12,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070079658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:12,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:12,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:47:12,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729151132] [2024-06-20 16:47:12,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:12,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:47:12,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:12,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:47:12,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:47:13,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:13,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 152 transitions, 1599 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:13,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:13,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:13,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:13,538 INFO L124 PetriNetUnfolderBase]: 1837/2756 cut-off events. [2024-06-20 16:47:13,539 INFO L125 PetriNetUnfolderBase]: For 27710/27717 co-relation queries the response was YES. [2024-06-20 16:47:13,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16578 conditions, 2756 events. 1837/2756 cut-off events. For 27710/27717 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12956 event pairs, 528 based on Foata normal form. 8/2762 useless extension candidates. Maximal degree in co-relation 16527. Up to 2614 conditions per place. [2024-06-20 16:47:13,558 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 155 selfloop transitions, 30 changer transitions 0/189 dead transitions. [2024-06-20 16:47:13,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 189 transitions, 2182 flow [2024-06-20 16:47:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:47:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:47:13,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:47:13,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-20 16:47:13,560 INFO L175 Difference]: Start difference. First operand has 103 places, 152 transitions, 1599 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:47:13,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 189 transitions, 2182 flow [2024-06-20 16:47:13,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 189 transitions, 2087 flow, removed 43 selfloop flow, removed 2 redundant places. [2024-06-20 16:47:13,599 INFO L231 Difference]: Finished difference. Result has 112 places, 166 transitions, 1777 flow [2024-06-20 16:47:13,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1777, PETRI_PLACES=112, PETRI_TRANSITIONS=166} [2024-06-20 16:47:13,600 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-20 16:47:13,600 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 166 transitions, 1777 flow [2024-06-20 16:47:13,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:13,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:13,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:13,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:47:13,601 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)] === [2024-06-20 16:47:13,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:13,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1158426511, now seen corresponding path program 4 times [2024-06-20 16:47:13,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:13,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393045623] [2024-06-20 16:47:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:13,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:14,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:14,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393045623] [2024-06-20 16:47:14,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393045623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:14,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:14,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:47:14,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262811679] [2024-06-20 16:47:14,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:14,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:47:14,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:14,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:47:14,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:47:14,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:14,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 166 transitions, 1777 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:14,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:14,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:14,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:15,308 INFO L124 PetriNetUnfolderBase]: 1832/2744 cut-off events. [2024-06-20 16:47:15,309 INFO L125 PetriNetUnfolderBase]: For 30628/30635 co-relation queries the response was YES. [2024-06-20 16:47:15,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17037 conditions, 2744 events. 1832/2744 cut-off events. For 30628/30635 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12884 event pairs, 528 based on Foata normal form. 8/2750 useless extension candidates. Maximal degree in co-relation 16981. Up to 2571 conditions per place. [2024-06-20 16:47:15,326 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 152 selfloop transitions, 41 changer transitions 0/197 dead transitions. [2024-06-20 16:47:15,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 197 transitions, 2299 flow [2024-06-20 16:47:15,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:47:15,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:47:15,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:47:15,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-20 16:47:15,328 INFO L175 Difference]: Start difference. First operand has 112 places, 166 transitions, 1777 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:47:15,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 197 transitions, 2299 flow [2024-06-20 16:47:15,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 197 transitions, 2239 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-20 16:47:15,372 INFO L231 Difference]: Finished difference. Result has 119 places, 174 transitions, 1917 flow [2024-06-20 16:47:15,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1717, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1917, PETRI_PLACES=119, PETRI_TRANSITIONS=174} [2024-06-20 16:47:15,372 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-20 16:47:15,373 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 174 transitions, 1917 flow [2024-06-20 16:47:15,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:15,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:15,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:15,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:47:15,373 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:15,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:15,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1960279976, now seen corresponding path program 1 times [2024-06-20 16:47:15,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:15,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024656849] [2024-06-20 16:47:15,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:15,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:16,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:16,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024656849] [2024-06-20 16:47:16,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024656849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:16,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:16,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:47:16,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745720044] [2024-06-20 16:47:16,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:16,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:47:16,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:16,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:47:16,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:47:16,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:16,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 174 transitions, 1917 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 16:47:16,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:16,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:16,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:16,760 INFO L124 PetriNetUnfolderBase]: 1830/2744 cut-off events. [2024-06-20 16:47:16,760 INFO L125 PetriNetUnfolderBase]: For 33350/33350 co-relation queries the response was YES. [2024-06-20 16:47:16,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17625 conditions, 2744 events. 1830/2744 cut-off events. For 33350/33350 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12931 event pairs, 493 based on Foata normal form. 6/2746 useless extension candidates. Maximal degree in co-relation 17566. Up to 2627 conditions per place. [2024-06-20 16:47:16,780 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 167 selfloop transitions, 17 changer transitions 0/188 dead transitions. [2024-06-20 16:47:16,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 188 transitions, 2399 flow [2024-06-20 16:47:16,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:47:16,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:47:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-20 16:47:16,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-20 16:47:16,783 INFO L175 Difference]: Start difference. First operand has 119 places, 174 transitions, 1917 flow. Second operand 5 states and 92 transitions. [2024-06-20 16:47:16,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 188 transitions, 2399 flow [2024-06-20 16:47:16,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 188 transitions, 2275 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 16:47:16,831 INFO L231 Difference]: Finished difference. Result has 119 places, 178 transitions, 1899 flow [2024-06-20 16:47:16,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1793, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1899, PETRI_PLACES=119, PETRI_TRANSITIONS=178} [2024-06-20 16:47:16,832 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-20 16:47:16,832 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 178 transitions, 1899 flow [2024-06-20 16:47:16,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 16:47:16,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:16,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:16,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:47:16,833 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)] === [2024-06-20 16:47:16,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:16,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1068593139, now seen corresponding path program 1 times [2024-06-20 16:47:16,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:16,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749141161] [2024-06-20 16:47:16,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:16,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:17,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:17,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749141161] [2024-06-20 16:47:17,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749141161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:17,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:17,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:47:17,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470965035] [2024-06-20 16:47:17,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:17,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:47:17,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:17,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:47:17,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:47:17,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:47:17,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 178 transitions, 1899 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:17,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:17,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:47:17,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:18,548 INFO L124 PetriNetUnfolderBase]: 1825/2749 cut-off events. [2024-06-20 16:47:18,548 INFO L125 PetriNetUnfolderBase]: For 36626/36723 co-relation queries the response was YES. [2024-06-20 16:47:18,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18028 conditions, 2749 events. 1825/2749 cut-off events. For 36626/36723 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13100 event pairs, 358 based on Foata normal form. 15/2723 useless extension candidates. Maximal degree in co-relation 17968. Up to 2525 conditions per place. [2024-06-20 16:47:18,566 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 156 selfloop transitions, 13 changer transitions 0/197 dead transitions. [2024-06-20 16:47:18,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 197 transitions, 2307 flow [2024-06-20 16:47:18,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:47:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:47:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-20 16:47:18,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2024-06-20 16:47:18,568 INFO L175 Difference]: Start difference. First operand has 119 places, 178 transitions, 1899 flow. Second operand 6 states and 113 transitions. [2024-06-20 16:47:18,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 197 transitions, 2307 flow [2024-06-20 16:47:18,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 197 transitions, 2259 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 16:47:18,617 INFO L231 Difference]: Finished difference. Result has 122 places, 180 transitions, 1916 flow [2024-06-20 16:47:18,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1851, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1916, PETRI_PLACES=122, PETRI_TRANSITIONS=180} [2024-06-20 16:47:18,618 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-20 16:47:18,618 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 180 transitions, 1916 flow [2024-06-20 16:47:18,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:18,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:18,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:18,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:47:18,619 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:18,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:18,619 INFO L85 PathProgramCache]: Analyzing trace with hash -816385509, now seen corresponding path program 2 times [2024-06-20 16:47:18,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:18,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151184621] [2024-06-20 16:47:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:18,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:19,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:19,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151184621] [2024-06-20 16:47:19,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151184621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:19,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:19,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:47:19,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117887203] [2024-06-20 16:47:19,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:19,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:47:19,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:19,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:47:19,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:47:19,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:47:19,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 180 transitions, 1916 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:19,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:19,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:47:19,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:20,349 INFO L124 PetriNetUnfolderBase]: 1811/2729 cut-off events. [2024-06-20 16:47:20,350 INFO L125 PetriNetUnfolderBase]: For 39030/39095 co-relation queries the response was YES. [2024-06-20 16:47:20,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18171 conditions, 2729 events. 1811/2729 cut-off events. For 39030/39095 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13008 event pairs, 463 based on Foata normal form. 15/2704 useless extension candidates. Maximal degree in co-relation 18110. Up to 2448 conditions per place. [2024-06-20 16:47:20,368 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 134 selfloop transitions, 36 changer transitions 0/198 dead transitions. [2024-06-20 16:47:20,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 198 transitions, 2328 flow [2024-06-20 16:47:20,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:47:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:47:20,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-20 16:47:20,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-20 16:47:20,370 INFO L175 Difference]: Start difference. First operand has 122 places, 180 transitions, 1916 flow. Second operand 6 states and 115 transitions. [2024-06-20 16:47:20,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 198 transitions, 2328 flow [2024-06-20 16:47:20,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 198 transitions, 2295 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 16:47:20,405 INFO L231 Difference]: Finished difference. Result has 124 places, 182 transitions, 2004 flow [2024-06-20 16:47:20,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1883, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2004, PETRI_PLACES=124, PETRI_TRANSITIONS=182} [2024-06-20 16:47:20,406 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-20 16:47:20,406 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 182 transitions, 2004 flow [2024-06-20 16:47:20,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:20,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:20,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:20,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:47:20,406 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)] === [2024-06-20 16:47:20,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:20,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1065731219, now seen corresponding path program 1 times [2024-06-20 16:47:20,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:20,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345875676] [2024-06-20 16:47:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:20,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:21,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:21,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345875676] [2024-06-20 16:47:21,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345875676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:21,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:21,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:21,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638137471] [2024-06-20 16:47:21,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:21,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:21,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:21,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:21,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:21,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:21,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 182 transitions, 2004 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:21,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:21,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:21,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:22,433 INFO L124 PetriNetUnfolderBase]: 1934/2900 cut-off events. [2024-06-20 16:47:22,434 INFO L125 PetriNetUnfolderBase]: For 45508/45508 co-relation queries the response was YES. [2024-06-20 16:47:22,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19763 conditions, 2900 events. 1934/2900 cut-off events. For 45508/45508 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13856 event pairs, 402 based on Foata normal form. 7/2903 useless extension candidates. Maximal degree in co-relation 19701. Up to 2504 conditions per place. [2024-06-20 16:47:22,453 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 154 selfloop transitions, 80 changer transitions 0/238 dead transitions. [2024-06-20 16:47:22,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 238 transitions, 3034 flow [2024-06-20 16:47:22,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:47:22,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:47:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-20 16:47:22,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496875 [2024-06-20 16:47:22,455 INFO L175 Difference]: Start difference. First operand has 124 places, 182 transitions, 2004 flow. Second operand 8 states and 159 transitions. [2024-06-20 16:47:22,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 238 transitions, 3034 flow [2024-06-20 16:47:22,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 238 transitions, 2953 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 16:47:22,504 INFO L231 Difference]: Finished difference. Result has 130 places, 210 transitions, 2588 flow [2024-06-20 16:47:22,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2588, PETRI_PLACES=130, PETRI_TRANSITIONS=210} [2024-06-20 16:47:22,504 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-06-20 16:47:22,504 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 210 transitions, 2588 flow [2024-06-20 16:47:22,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:22,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:22,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:22,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:47:22,505 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)] === [2024-06-20 16:47:22,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:22,505 INFO L85 PathProgramCache]: Analyzing trace with hash -154418505, now seen corresponding path program 2 times [2024-06-20 16:47:22,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:22,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212574067] [2024-06-20 16:47:22,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:22,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:23,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:23,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212574067] [2024-06-20 16:47:23,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212574067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:23,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:23,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:23,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792650909] [2024-06-20 16:47:23,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:23,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:23,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:23,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:23,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:23,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:23,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 210 transitions, 2588 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:23,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:23,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:23,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:24,651 INFO L124 PetriNetUnfolderBase]: 1988/3011 cut-off events. [2024-06-20 16:47:24,651 INFO L125 PetriNetUnfolderBase]: For 53969/53969 co-relation queries the response was YES. [2024-06-20 16:47:24,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22151 conditions, 3011 events. 1988/3011 cut-off events. For 53969/53969 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14691 event pairs, 408 based on Foata normal form. 5/3012 useless extension candidates. Maximal degree in co-relation 22086. Up to 2435 conditions per place. [2024-06-20 16:47:24,673 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 145 selfloop transitions, 110 changer transitions 0/259 dead transitions. [2024-06-20 16:47:24,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 259 transitions, 3609 flow [2024-06-20 16:47:24,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:47:24,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:47:24,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-20 16:47:24,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49722222222222223 [2024-06-20 16:47:24,675 INFO L175 Difference]: Start difference. First operand has 130 places, 210 transitions, 2588 flow. Second operand 9 states and 179 transitions. [2024-06-20 16:47:24,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 259 transitions, 3609 flow [2024-06-20 16:47:24,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 259 transitions, 3465 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-20 16:47:24,743 INFO L231 Difference]: Finished difference. Result has 138 places, 224 transitions, 3029 flow [2024-06-20 16:47:24,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3029, PETRI_PLACES=138, PETRI_TRANSITIONS=224} [2024-06-20 16:47:24,743 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-20 16:47:24,744 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 224 transitions, 3029 flow [2024-06-20 16:47:24,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:24,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:24,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:24,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:47:24,744 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)] === [2024-06-20 16:47:24,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:24,745 INFO L85 PathProgramCache]: Analyzing trace with hash 705645565, now seen corresponding path program 1 times [2024-06-20 16:47:24,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:24,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175843335] [2024-06-20 16:47:24,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:24,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:25,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:25,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175843335] [2024-06-20 16:47:25,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175843335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:25,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:25,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:25,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511215391] [2024-06-20 16:47:25,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:25,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:25,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:25,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:25,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:25,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:25,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 224 transitions, 3029 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:25,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:25,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:25,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:26,558 INFO L124 PetriNetUnfolderBase]: 2119/3202 cut-off events. [2024-06-20 16:47:26,558 INFO L125 PetriNetUnfolderBase]: For 67737/67744 co-relation queries the response was YES. [2024-06-20 16:47:26,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24731 conditions, 3202 events. 2119/3202 cut-off events. For 67737/67744 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15755 event pairs, 426 based on Foata normal form. 34/3234 useless extension candidates. Maximal degree in co-relation 24662. Up to 2733 conditions per place. [2024-06-20 16:47:26,582 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 200 selfloop transitions, 67 changer transitions 0/271 dead transitions. [2024-06-20 16:47:26,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 271 transitions, 3985 flow [2024-06-20 16:47:26,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:47:26,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:47:26,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-20 16:47:26,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-20 16:47:26,584 INFO L175 Difference]: Start difference. First operand has 138 places, 224 transitions, 3029 flow. Second operand 9 states and 176 transitions. [2024-06-20 16:47:26,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 271 transitions, 3985 flow [2024-06-20 16:47:26,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 271 transitions, 3847 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-20 16:47:26,658 INFO L231 Difference]: Finished difference. Result has 148 places, 236 transitions, 3343 flow [2024-06-20 16:47:26,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2893, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3343, PETRI_PLACES=148, PETRI_TRANSITIONS=236} [2024-06-20 16:47:26,659 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-20 16:47:26,659 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 236 transitions, 3343 flow [2024-06-20 16:47:26,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:26,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:26,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:26,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:47:26,660 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:26,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:26,660 INFO L85 PathProgramCache]: Analyzing trace with hash 619697647, now seen corresponding path program 2 times [2024-06-20 16:47:26,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:26,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704543384] [2024-06-20 16:47:26,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:26,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:27,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:27,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704543384] [2024-06-20 16:47:27,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704543384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:27,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:27,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:27,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794420237] [2024-06-20 16:47:27,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:27,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:27,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:27,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:27,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:27,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:27,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 236 transitions, 3343 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:27,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:27,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:27,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:28,699 INFO L124 PetriNetUnfolderBase]: 2533/3887 cut-off events. [2024-06-20 16:47:28,699 INFO L125 PetriNetUnfolderBase]: For 98004/98004 co-relation queries the response was YES. [2024-06-20 16:47:28,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29951 conditions, 3887 events. 2533/3887 cut-off events. For 98004/98004 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 20230 event pairs, 536 based on Foata normal form. 97/3980 useless extension candidates. Maximal degree in co-relation 29876. Up to 2915 conditions per place. [2024-06-20 16:47:28,733 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 210 selfloop transitions, 71 changer transitions 0/285 dead transitions. [2024-06-20 16:47:28,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 285 transitions, 4347 flow [2024-06-20 16:47:28,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:47:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:47:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-20 16:47:28,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4925 [2024-06-20 16:47:28,735 INFO L175 Difference]: Start difference. First operand has 148 places, 236 transitions, 3343 flow. Second operand 10 states and 197 transitions. [2024-06-20 16:47:28,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 285 transitions, 4347 flow [2024-06-20 16:47:28,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 285 transitions, 4250 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-20 16:47:28,827 INFO L231 Difference]: Finished difference. Result has 156 places, 244 transitions, 3635 flow [2024-06-20 16:47:28,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3246, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3635, PETRI_PLACES=156, PETRI_TRANSITIONS=244} [2024-06-20 16:47:28,828 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-20 16:47:28,828 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 244 transitions, 3635 flow [2024-06-20 16:47:28,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:28,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:28,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:28,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:47:28,828 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)] === [2024-06-20 16:47:28,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:28,828 INFO L85 PathProgramCache]: Analyzing trace with hash 847592039, now seen corresponding path program 3 times [2024-06-20 16:47:28,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:28,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83658168] [2024-06-20 16:47:28,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:28,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:30,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:30,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83658168] [2024-06-20 16:47:30,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83658168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:30,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:30,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:30,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819465965] [2024-06-20 16:47:30,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:30,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:30,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:30,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:30,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:30,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:30,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 244 transitions, 3635 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:30,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:30,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:30,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:31,073 INFO L124 PetriNetUnfolderBase]: 2544/3908 cut-off events. [2024-06-20 16:47:31,073 INFO L125 PetriNetUnfolderBase]: For 89620/89620 co-relation queries the response was YES. [2024-06-20 16:47:31,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31245 conditions, 3908 events. 2544/3908 cut-off events. For 89620/89620 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 20411 event pairs, 618 based on Foata normal form. 2/3906 useless extension candidates. Maximal degree in co-relation 31168. Up to 3646 conditions per place. [2024-06-20 16:47:31,103 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 228 selfloop transitions, 49 changer transitions 0/281 dead transitions. [2024-06-20 16:47:31,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 281 transitions, 4470 flow [2024-06-20 16:47:31,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:47:31,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:47:31,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:47:31,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 16:47:31,104 INFO L175 Difference]: Start difference. First operand has 156 places, 244 transitions, 3635 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:47:31,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 281 transitions, 4470 flow [2024-06-20 16:47:31,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 281 transitions, 4244 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-20 16:47:31,237 INFO L231 Difference]: Finished difference. Result has 162 places, 254 transitions, 3794 flow [2024-06-20 16:47:31,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3414, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3794, PETRI_PLACES=162, PETRI_TRANSITIONS=254} [2024-06-20 16:47:31,238 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-20 16:47:31,238 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 254 transitions, 3794 flow [2024-06-20 16:47:31,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:31,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:31,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:31,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:47:31,239 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)] === [2024-06-20 16:47:31,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:31,239 INFO L85 PathProgramCache]: Analyzing trace with hash 619697399, now seen corresponding path program 4 times [2024-06-20 16:47:31,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:31,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267041842] [2024-06-20 16:47:31,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:31,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:32,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:32,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267041842] [2024-06-20 16:47:32,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267041842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:32,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:32,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:32,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949989974] [2024-06-20 16:47:32,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:32,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:32,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:32,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:32,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:32,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:32,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 254 transitions, 3794 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:32,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:32,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:32,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:33,408 INFO L124 PetriNetUnfolderBase]: 2574/3964 cut-off events. [2024-06-20 16:47:33,408 INFO L125 PetriNetUnfolderBase]: For 93207/93207 co-relation queries the response was YES. [2024-06-20 16:47:33,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31723 conditions, 3964 events. 2574/3964 cut-off events. For 93207/93207 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 20845 event pairs, 597 based on Foata normal form. 5/3965 useless extension candidates. Maximal degree in co-relation 31641. Up to 3553 conditions per place. [2024-06-20 16:47:33,437 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 211 selfloop transitions, 77 changer transitions 0/292 dead transitions. [2024-06-20 16:47:33,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 292 transitions, 4648 flow [2024-06-20 16:47:33,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:47:33,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:47:33,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-20 16:47:33,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-20 16:47:33,438 INFO L175 Difference]: Start difference. First operand has 162 places, 254 transitions, 3794 flow. Second operand 10 states and 190 transitions. [2024-06-20 16:47:33,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 292 transitions, 4648 flow [2024-06-20 16:47:33,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 292 transitions, 4510 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-20 16:47:33,546 INFO L231 Difference]: Finished difference. Result has 168 places, 259 transitions, 3967 flow [2024-06-20 16:47:33,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3658, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3967, PETRI_PLACES=168, PETRI_TRANSITIONS=259} [2024-06-20 16:47:33,546 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-20 16:47:33,546 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 259 transitions, 3967 flow [2024-06-20 16:47:33,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:33,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:33,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:33,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:47:33,547 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)] === [2024-06-20 16:47:33,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:33,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1559756637, now seen corresponding path program 5 times [2024-06-20 16:47:33,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:33,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831218677] [2024-06-20 16:47:33,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:33,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:34,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:34,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831218677] [2024-06-20 16:47:34,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831218677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:34,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:34,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:34,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444230539] [2024-06-20 16:47:34,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:34,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:34,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:34,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:34,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:34,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:34,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 259 transitions, 3967 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:34,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:34,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:34,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:35,721 INFO L124 PetriNetUnfolderBase]: 2585/3985 cut-off events. [2024-06-20 16:47:35,721 INFO L125 PetriNetUnfolderBase]: For 100003/100003 co-relation queries the response was YES. [2024-06-20 16:47:35,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32794 conditions, 3985 events. 2585/3985 cut-off events. For 100003/100003 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 20971 event pairs, 621 based on Foata normal form. 2/3983 useless extension candidates. Maximal degree in co-relation 32710. Up to 3687 conditions per place. [2024-06-20 16:47:35,757 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 234 selfloop transitions, 55 changer transitions 0/293 dead transitions. [2024-06-20 16:47:35,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 293 transitions, 4713 flow [2024-06-20 16:47:35,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:47:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:47:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-20 16:47:35,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425 [2024-06-20 16:47:35,759 INFO L175 Difference]: Start difference. First operand has 168 places, 259 transitions, 3967 flow. Second operand 10 states and 177 transitions. [2024-06-20 16:47:35,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 293 transitions, 4713 flow [2024-06-20 16:47:35,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 293 transitions, 4428 flow, removed 69 selfloop flow, removed 8 redundant places. [2024-06-20 16:47:35,893 INFO L231 Difference]: Finished difference. Result has 170 places, 262 transitions, 3896 flow [2024-06-20 16:47:35,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3684, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3896, PETRI_PLACES=170, PETRI_TRANSITIONS=262} [2024-06-20 16:47:35,893 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 129 predicate places. [2024-06-20 16:47:35,893 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 262 transitions, 3896 flow [2024-06-20 16:47:35,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:35,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:35,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:35,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:47:35,894 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:35,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:35,894 INFO L85 PathProgramCache]: Analyzing trace with hash 847598797, now seen corresponding path program 3 times [2024-06-20 16:47:35,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:35,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47618096] [2024-06-20 16:47:35,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:35,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:36,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:36,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47618096] [2024-06-20 16:47:36,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47618096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:36,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:36,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:36,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001515752] [2024-06-20 16:47:36,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:36,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:36,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:36,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:36,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:36,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:36,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 262 transitions, 3896 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:36,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:36,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:36,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:37,746 INFO L124 PetriNetUnfolderBase]: 2677/4137 cut-off events. [2024-06-20 16:47:37,746 INFO L125 PetriNetUnfolderBase]: For 111693/111693 co-relation queries the response was YES. [2024-06-20 16:47:37,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33740 conditions, 4137 events. 2677/4137 cut-off events. For 111693/111693 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22107 event pairs, 631 based on Foata normal form. 24/4157 useless extension candidates. Maximal degree in co-relation 33655. Up to 3710 conditions per place. [2024-06-20 16:47:37,784 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 239 selfloop transitions, 53 changer transitions 0/296 dead transitions. [2024-06-20 16:47:37,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 296 transitions, 4678 flow [2024-06-20 16:47:37,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:47:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:47:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:47:37,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-20 16:47:37,786 INFO L175 Difference]: Start difference. First operand has 170 places, 262 transitions, 3896 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:47:37,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 296 transitions, 4678 flow [2024-06-20 16:47:37,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 296 transitions, 4490 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-20 16:47:37,931 INFO L231 Difference]: Finished difference. Result has 171 places, 264 transitions, 3886 flow [2024-06-20 16:47:37,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3708, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3886, PETRI_PLACES=171, PETRI_TRANSITIONS=264} [2024-06-20 16:47:37,932 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-20 16:47:37,932 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 264 transitions, 3886 flow [2024-06-20 16:47:37,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:37,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:37,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:37,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:47:37,933 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:37,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:37,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1551482179, now seen corresponding path program 4 times [2024-06-20 16:47:37,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:37,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565351888] [2024-06-20 16:47:37,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:37,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:38,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:38,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565351888] [2024-06-20 16:47:38,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565351888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:38,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:38,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:38,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998713194] [2024-06-20 16:47:38,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:38,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:38,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:38,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:38,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:39,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:39,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 264 transitions, 3886 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:39,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:39,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:39,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:39,927 INFO L124 PetriNetUnfolderBase]: 2694/4164 cut-off events. [2024-06-20 16:47:39,927 INFO L125 PetriNetUnfolderBase]: For 113309/113309 co-relation queries the response was YES. [2024-06-20 16:47:39,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34220 conditions, 4164 events. 2694/4164 cut-off events. For 113309/113309 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22290 event pairs, 656 based on Foata normal form. 4/4164 useless extension candidates. Maximal degree in co-relation 34134. Up to 3656 conditions per place. [2024-06-20 16:47:39,966 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 228 selfloop transitions, 76 changer transitions 0/308 dead transitions. [2024-06-20 16:47:39,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 308 transitions, 4760 flow [2024-06-20 16:47:39,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:47:39,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:47:39,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-20 16:47:39,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-20 16:47:39,968 INFO L175 Difference]: Start difference. First operand has 171 places, 264 transitions, 3886 flow. Second operand 10 states and 184 transitions. [2024-06-20 16:47:39,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 308 transitions, 4760 flow [2024-06-20 16:47:40,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 308 transitions, 4630 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 16:47:40,136 INFO L231 Difference]: Finished difference. Result has 175 places, 272 transitions, 4077 flow [2024-06-20 16:47:40,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3756, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4077, PETRI_PLACES=175, PETRI_TRANSITIONS=272} [2024-06-20 16:47:40,136 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-20 16:47:40,136 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 272 transitions, 4077 flow [2024-06-20 16:47:40,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:40,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:40,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:40,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:47:40,137 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:40,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:40,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1551482427, now seen corresponding path program 6 times [2024-06-20 16:47:40,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:40,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191267760] [2024-06-20 16:47:40,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:40,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:41,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:41,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191267760] [2024-06-20 16:47:41,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191267760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:41,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:41,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:41,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338508443] [2024-06-20 16:47:41,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:41,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:41,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:41,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:41,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:41,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:41,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 272 transitions, 4077 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:41,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:41,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:41,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:42,265 INFO L124 PetriNetUnfolderBase]: 2689/4157 cut-off events. [2024-06-20 16:47:42,265 INFO L125 PetriNetUnfolderBase]: For 115684/115684 co-relation queries the response was YES. [2024-06-20 16:47:42,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34428 conditions, 4157 events. 2689/4157 cut-off events. For 115684/115684 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 22324 event pairs, 656 based on Foata normal form. 2/4155 useless extension candidates. Maximal degree in co-relation 34340. Up to 3769 conditions per place. [2024-06-20 16:47:42,302 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 227 selfloop transitions, 83 changer transitions 0/314 dead transitions. [2024-06-20 16:47:42,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 314 transitions, 4901 flow [2024-06-20 16:47:42,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:47:42,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:47:42,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-20 16:47:42,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-20 16:47:42,304 INFO L175 Difference]: Start difference. First operand has 175 places, 272 transitions, 4077 flow. Second operand 11 states and 195 transitions. [2024-06-20 16:47:42,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 314 transitions, 4901 flow [2024-06-20 16:47:42,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 314 transitions, 4742 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 16:47:42,496 INFO L231 Difference]: Finished difference. Result has 180 places, 279 transitions, 4254 flow [2024-06-20 16:47:42,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3920, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4254, PETRI_PLACES=180, PETRI_TRANSITIONS=279} [2024-06-20 16:47:42,496 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-20 16:47:42,497 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 279 transitions, 4254 flow [2024-06-20 16:47:42,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:42,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:42,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:42,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:47:42,497 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)] === [2024-06-20 16:47:42,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:42,498 INFO L85 PathProgramCache]: Analyzing trace with hash 856169677, now seen corresponding path program 5 times [2024-06-20 16:47:42,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:42,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091825104] [2024-06-20 16:47:42,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:42,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:43,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:43,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091825104] [2024-06-20 16:47:43,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091825104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:43,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:43,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:43,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247426286] [2024-06-20 16:47:43,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:43,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:43,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:43,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:43,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:43,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:43,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 279 transitions, 4254 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:43,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:43,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:43,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:44,533 INFO L124 PetriNetUnfolderBase]: 2792/4336 cut-off events. [2024-06-20 16:47:44,533 INFO L125 PetriNetUnfolderBase]: For 127106/127106 co-relation queries the response was YES. [2024-06-20 16:47:44,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36541 conditions, 4336 events. 2792/4336 cut-off events. For 127106/127106 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 23612 event pairs, 637 based on Foata normal form. 4/4336 useless extension candidates. Maximal degree in co-relation 36451. Up to 3440 conditions per place. [2024-06-20 16:47:44,581 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 232 selfloop transitions, 83 changer transitions 0/319 dead transitions. [2024-06-20 16:47:44,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 319 transitions, 5269 flow [2024-06-20 16:47:44,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:47:44,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:47:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 16:47:44,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-20 16:47:44,582 INFO L175 Difference]: Start difference. First operand has 180 places, 279 transitions, 4254 flow. Second operand 9 states and 169 transitions. [2024-06-20 16:47:44,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 319 transitions, 5269 flow [2024-06-20 16:47:44,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 319 transitions, 5055 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-20 16:47:44,776 INFO L231 Difference]: Finished difference. Result has 182 places, 284 transitions, 4382 flow [2024-06-20 16:47:44,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4040, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4382, PETRI_PLACES=182, PETRI_TRANSITIONS=284} [2024-06-20 16:47:44,777 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-20 16:47:44,777 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 284 transitions, 4382 flow [2024-06-20 16:47:44,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:44,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:44,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:44,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:47:44,778 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)] === [2024-06-20 16:47:44,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:44,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1318256641, now seen corresponding path program 1 times [2024-06-20 16:47:44,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:44,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557747753] [2024-06-20 16:47:44,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:44,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:45,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:45,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557747753] [2024-06-20 16:47:45,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557747753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:45,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:45,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:45,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826861467] [2024-06-20 16:47:45,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:45,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:45,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:45,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:45,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:45,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:45,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 284 transitions, 4382 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:45,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:45,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:45,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:46,824 INFO L124 PetriNetUnfolderBase]: 2976/4620 cut-off events. [2024-06-20 16:47:46,825 INFO L125 PetriNetUnfolderBase]: For 145993/145993 co-relation queries the response was YES. [2024-06-20 16:47:46,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39164 conditions, 4620 events. 2976/4620 cut-off events. For 145993/145993 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 25402 event pairs, 547 based on Foata normal form. 14/4630 useless extension candidates. Maximal degree in co-relation 39072. Up to 4172 conditions per place. [2024-06-20 16:47:46,868 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 296 selfloop transitions, 28 changer transitions 0/328 dead transitions. [2024-06-20 16:47:46,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 328 transitions, 5520 flow [2024-06-20 16:47:46,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:47:46,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:47:46,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 16:47:46,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-20 16:47:46,869 INFO L175 Difference]: Start difference. First operand has 182 places, 284 transitions, 4382 flow. Second operand 8 states and 153 transitions. [2024-06-20 16:47:46,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 328 transitions, 5520 flow [2024-06-20 16:47:47,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 328 transitions, 5316 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-20 16:47:47,089 INFO L231 Difference]: Finished difference. Result has 186 places, 295 transitions, 4519 flow [2024-06-20 16:47:47,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4184, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4519, PETRI_PLACES=186, PETRI_TRANSITIONS=295} [2024-06-20 16:47:47,090 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-20 16:47:47,091 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 295 transitions, 4519 flow [2024-06-20 16:47:47,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:47,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:47,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:47,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:47:47,091 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:47,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:47,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1321918051, now seen corresponding path program 2 times [2024-06-20 16:47:47,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:47,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930164063] [2024-06-20 16:47:47,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:47,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:48,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:48,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930164063] [2024-06-20 16:47:48,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930164063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:48,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:48,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:48,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464236551] [2024-06-20 16:47:48,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:48,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:48,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:48,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:48,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:48,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:48,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 295 transitions, 4519 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:48,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:48,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:48,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:49,387 INFO L124 PetriNetUnfolderBase]: 3280/5086 cut-off events. [2024-06-20 16:47:49,387 INFO L125 PetriNetUnfolderBase]: For 175398/175398 co-relation queries the response was YES. [2024-06-20 16:47:49,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43892 conditions, 5086 events. 3280/5086 cut-off events. For 175398/175398 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 28505 event pairs, 735 based on Foata normal form. 20/5102 useless extension candidates. Maximal degree in co-relation 43797. Up to 4219 conditions per place. [2024-06-20 16:47:49,442 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 278 selfloop transitions, 66 changer transitions 0/348 dead transitions. [2024-06-20 16:47:49,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 348 transitions, 5982 flow [2024-06-20 16:47:49,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:47:49,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:47:49,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-20 16:47:49,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-20 16:47:49,444 INFO L175 Difference]: Start difference. First operand has 186 places, 295 transitions, 4519 flow. Second operand 8 states and 164 transitions. [2024-06-20 16:47:49,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 348 transitions, 5982 flow [2024-06-20 16:47:49,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 348 transitions, 5860 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-20 16:47:49,734 INFO L231 Difference]: Finished difference. Result has 192 places, 305 transitions, 4839 flow [2024-06-20 16:47:49,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4397, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4839, PETRI_PLACES=192, PETRI_TRANSITIONS=305} [2024-06-20 16:47:49,734 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-20 16:47:49,734 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 305 transitions, 4839 flow [2024-06-20 16:47:49,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:49,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:49,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:49,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:47:49,735 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)] === [2024-06-20 16:47:49,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:49,735 INFO L85 PathProgramCache]: Analyzing trace with hash 462002099, now seen corresponding path program 3 times [2024-06-20 16:47:49,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:49,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252410459] [2024-06-20 16:47:49,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:49,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:50,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:50,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252410459] [2024-06-20 16:47:50,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252410459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:50,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:50,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:50,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529600594] [2024-06-20 16:47:50,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:50,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:50,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:50,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:50,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:50,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:50,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 305 transitions, 4839 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:50,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:50,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:50,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:52,163 INFO L124 PetriNetUnfolderBase]: 3338/5180 cut-off events. [2024-06-20 16:47:52,163 INFO L125 PetriNetUnfolderBase]: For 186336/186336 co-relation queries the response was YES. [2024-06-20 16:47:52,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45376 conditions, 5180 events. 3338/5180 cut-off events. For 186336/186336 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 29225 event pairs, 805 based on Foata normal form. 20/5196 useless extension candidates. Maximal degree in co-relation 45278. Up to 4646 conditions per place. [2024-06-20 16:47:52,212 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 265 selfloop transitions, 73 changer transitions 0/342 dead transitions. [2024-06-20 16:47:52,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 342 transitions, 5867 flow [2024-06-20 16:47:52,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:47:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:47:52,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-20 16:47:52,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496875 [2024-06-20 16:47:52,214 INFO L175 Difference]: Start difference. First operand has 192 places, 305 transitions, 4839 flow. Second operand 8 states and 159 transitions. [2024-06-20 16:47:52,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 342 transitions, 5867 flow [2024-06-20 16:47:52,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 342 transitions, 5701 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-20 16:47:52,561 INFO L231 Difference]: Finished difference. Result has 196 places, 308 transitions, 4916 flow [2024-06-20 16:47:52,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4681, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4916, PETRI_PLACES=196, PETRI_TRANSITIONS=308} [2024-06-20 16:47:52,561 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-20 16:47:52,561 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 308 transitions, 4916 flow [2024-06-20 16:47:52,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:52,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:52,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:52,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:47:52,562 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)] === [2024-06-20 16:47:52,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:52,562 INFO L85 PathProgramCache]: Analyzing trace with hash 462008051, now seen corresponding path program 1 times [2024-06-20 16:47:52,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:52,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841613529] [2024-06-20 16:47:52,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:52,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:53,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:53,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841613529] [2024-06-20 16:47:53,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841613529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:53,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:53,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:47:53,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332388979] [2024-06-20 16:47:53,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:53,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:47:53,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:53,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:47:53,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:47:53,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:53,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 308 transitions, 4916 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:53,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:53,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:53,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:55,189 INFO L124 PetriNetUnfolderBase]: 3591/5588 cut-off events. [2024-06-20 16:47:55,189 INFO L125 PetriNetUnfolderBase]: For 217000/217000 co-relation queries the response was YES. [2024-06-20 16:47:55,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48649 conditions, 5588 events. 3591/5588 cut-off events. For 217000/217000 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 32022 event pairs, 798 based on Foata normal form. 58/5642 useless extension candidates. Maximal degree in co-relation 48549. Up to 4594 conditions per place. [2024-06-20 16:47:55,253 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 249 selfloop transitions, 108 changer transitions 0/361 dead transitions. [2024-06-20 16:47:55,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 361 transitions, 6232 flow [2024-06-20 16:47:55,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:47:55,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:47:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-20 16:47:55,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4925 [2024-06-20 16:47:55,254 INFO L175 Difference]: Start difference. First operand has 196 places, 308 transitions, 4916 flow. Second operand 10 states and 197 transitions. [2024-06-20 16:47:55,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 361 transitions, 6232 flow [2024-06-20 16:47:55,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 361 transitions, 6057 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 16:47:55,639 INFO L231 Difference]: Finished difference. Result has 204 places, 322 transitions, 5399 flow [2024-06-20 16:47:55,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4741, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5399, PETRI_PLACES=204, PETRI_TRANSITIONS=322} [2024-06-20 16:47:55,640 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-20 16:47:55,640 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 322 transitions, 5399 flow [2024-06-20 16:47:55,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:55,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:55,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:55,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:47:55,641 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)] === [2024-06-20 16:47:55,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:55,641 INFO L85 PathProgramCache]: Analyzing trace with hash -497569255, now seen corresponding path program 2 times [2024-06-20 16:47:55,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:55,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131709651] [2024-06-20 16:47:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:55,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:56,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:56,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131709651] [2024-06-20 16:47:56,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131709651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:56,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:56,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:47:56,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575538566] [2024-06-20 16:47:56,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:56,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:47:56,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:56,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:47:56,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:47:56,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:47:56,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 322 transitions, 5399 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:56,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:56,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:47:56,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:58,405 INFO L124 PetriNetUnfolderBase]: 3876/6071 cut-off events. [2024-06-20 16:47:58,405 INFO L125 PetriNetUnfolderBase]: For 242036/242043 co-relation queries the response was YES. [2024-06-20 16:47:58,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53340 conditions, 6071 events. 3876/6071 cut-off events. For 242036/242043 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 35711 event pairs, 976 based on Foata normal form. 64/6133 useless extension candidates. Maximal degree in co-relation 53235. Up to 5322 conditions per place. [2024-06-20 16:47:58,465 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 316 selfloop transitions, 63 changer transitions 0/383 dead transitions. [2024-06-20 16:47:58,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 383 transitions, 6847 flow [2024-06-20 16:47:58,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:47:58,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:47:58,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-20 16:47:58,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4825 [2024-06-20 16:47:58,468 INFO L175 Difference]: Start difference. First operand has 204 places, 322 transitions, 5399 flow. Second operand 10 states and 193 transitions. [2024-06-20 16:47:58,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 383 transitions, 6847 flow [2024-06-20 16:47:58,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 383 transitions, 6692 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-20 16:47:58,874 INFO L231 Difference]: Finished difference. Result has 213 places, 340 transitions, 5791 flow [2024-06-20 16:47:58,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5246, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5791, PETRI_PLACES=213, PETRI_TRANSITIONS=340} [2024-06-20 16:47:58,875 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-20 16:47:58,875 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 340 transitions, 5791 flow [2024-06-20 16:47:58,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:58,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:58,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:58,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:47:58,875 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)] === [2024-06-20 16:47:58,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:58,876 INFO L85 PathProgramCache]: Analyzing trace with hash -492005065, now seen corresponding path program 3 times [2024-06-20 16:47:58,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:58,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228721475] [2024-06-20 16:47:58,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:58,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:00,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:00,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228721475] [2024-06-20 16:48:00,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228721475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:00,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:00,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:48:00,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885668262] [2024-06-20 16:48:00,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:00,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:48:00,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:00,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:48:00,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:48:00,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:48:00,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 340 transitions, 5791 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:00,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:00,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:48:00,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:02,227 INFO L124 PetriNetUnfolderBase]: 4182/6595 cut-off events. [2024-06-20 16:48:02,227 INFO L125 PetriNetUnfolderBase]: For 266052/266059 co-relation queries the response was YES. [2024-06-20 16:48:02,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57401 conditions, 6595 events. 4182/6595 cut-off events. For 266052/266059 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 39823 event pairs, 1074 based on Foata normal form. 64/6657 useless extension candidates. Maximal degree in co-relation 57292. Up to 5659 conditions per place. [2024-06-20 16:48:02,289 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 297 selfloop transitions, 94 changer transitions 0/395 dead transitions. [2024-06-20 16:48:02,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 395 transitions, 7044 flow [2024-06-20 16:48:02,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:48:02,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:48:02,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-20 16:48:02,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-20 16:48:02,291 INFO L175 Difference]: Start difference. First operand has 213 places, 340 transitions, 5791 flow. Second operand 11 states and 216 transitions. [2024-06-20 16:48:02,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 395 transitions, 7044 flow [2024-06-20 16:48:02,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 395 transitions, 6900 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-20 16:48:02,684 INFO L231 Difference]: Finished difference. Result has 222 places, 348 transitions, 6045 flow [2024-06-20 16:48:02,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5647, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6045, PETRI_PLACES=222, PETRI_TRANSITIONS=348} [2024-06-20 16:48:02,685 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-20 16:48:02,685 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 348 transitions, 6045 flow [2024-06-20 16:48:02,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:02,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:02,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:02,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:48:02,685 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:02,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:02,685 INFO L85 PathProgramCache]: Analyzing trace with hash -491997625, now seen corresponding path program 4 times [2024-06-20 16:48:02,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:02,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847495964] [2024-06-20 16:48:02,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:02,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:03,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:03,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:03,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847495964] [2024-06-20 16:48:03,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847495964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:03,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:03,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:48:03,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990760123] [2024-06-20 16:48:03,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:03,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:48:03,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:03,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:48:03,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:48:04,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:48:04,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 348 transitions, 6045 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:04,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:04,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:48:04,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:06,273 INFO L124 PetriNetUnfolderBase]: 5517/8824 cut-off events. [2024-06-20 16:48:06,273 INFO L125 PetriNetUnfolderBase]: For 359159/359159 co-relation queries the response was YES. [2024-06-20 16:48:06,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77177 conditions, 8824 events. 5517/8824 cut-off events. For 359159/359159 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 57235 event pairs, 1408 based on Foata normal form. 48/8871 useless extension candidates. Maximal degree in co-relation 77066. Up to 6699 conditions per place. [2024-06-20 16:48:06,359 INFO L140 encePairwiseOnDemand]: 23/40 looper letters, 402 selfloop transitions, 97 changer transitions 0/503 dead transitions. [2024-06-20 16:48:06,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 503 transitions, 9685 flow [2024-06-20 16:48:06,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:48:06,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:48:06,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 248 transitions. [2024-06-20 16:48:06,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2024-06-20 16:48:06,361 INFO L175 Difference]: Start difference. First operand has 222 places, 348 transitions, 6045 flow. Second operand 13 states and 248 transitions. [2024-06-20 16:48:06,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 503 transitions, 9685 flow [2024-06-20 16:48:07,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 503 transitions, 9238 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-06-20 16:48:07,277 INFO L231 Difference]: Finished difference. Result has 232 places, 434 transitions, 8026 flow [2024-06-20 16:48:07,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5803, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8026, PETRI_PLACES=232, PETRI_TRANSITIONS=434} [2024-06-20 16:48:07,278 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-20 16:48:07,278 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 434 transitions, 8026 flow [2024-06-20 16:48:07,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:07,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:07,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:07,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:48:07,279 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:07,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:07,279 INFO L85 PathProgramCache]: Analyzing trace with hash 2006886649, now seen corresponding path program 5 times [2024-06-20 16:48:07,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:07,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057144384] [2024-06-20 16:48:07,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:07,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:08,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:08,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057144384] [2024-06-20 16:48:08,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057144384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:08,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:08,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:48:08,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565986512] [2024-06-20 16:48:08,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:08,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:48:08,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:08,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:48:08,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:48:08,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:48:08,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 434 transitions, 8026 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:08,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:08,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:48:08,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:11,267 INFO L124 PetriNetUnfolderBase]: 5975/9616 cut-off events. [2024-06-20 16:48:11,267 INFO L125 PetriNetUnfolderBase]: For 418824/418824 co-relation queries the response was YES. [2024-06-20 16:48:11,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85043 conditions, 9616 events. 5975/9616 cut-off events. For 418824/418824 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 63292 event pairs, 1318 based on Foata normal form. 48/9659 useless extension candidates. Maximal degree in co-relation 84927. Up to 4798 conditions per place. [2024-06-20 16:48:11,383 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 235 selfloop transitions, 252 changer transitions 0/491 dead transitions. [2024-06-20 16:48:11,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 491 transitions, 9861 flow [2024-06-20 16:48:11,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:48:11,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:48:11,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-20 16:48:11,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-06-20 16:48:11,385 INFO L175 Difference]: Start difference. First operand has 232 places, 434 transitions, 8026 flow. Second operand 10 states and 208 transitions. [2024-06-20 16:48:11,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 491 transitions, 9861 flow [2024-06-20 16:48:12,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 491 transitions, 9751 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-20 16:48:12,285 INFO L231 Difference]: Finished difference. Result has 240 places, 438 transitions, 8703 flow [2024-06-20 16:48:12,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7916, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8703, PETRI_PLACES=240, PETRI_TRANSITIONS=438} [2024-06-20 16:48:12,285 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 199 predicate places. [2024-06-20 16:48:12,286 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 438 transitions, 8703 flow [2024-06-20 16:48:12,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:12,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:12,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:12,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:48:12,286 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)] === [2024-06-20 16:48:12,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:12,286 INFO L85 PathProgramCache]: Analyzing trace with hash 154539921, now seen corresponding path program 6 times [2024-06-20 16:48:12,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:12,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189841255] [2024-06-20 16:48:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:12,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:13,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:13,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189841255] [2024-06-20 16:48:13,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189841255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:13,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:13,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:48:13,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893203889] [2024-06-20 16:48:13,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:13,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:48:13,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:13,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:48:13,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:48:13,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:48:13,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 438 transitions, 8703 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:13,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:13,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:48:13,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:16,590 INFO L124 PetriNetUnfolderBase]: 6120/9937 cut-off events. [2024-06-20 16:48:16,590 INFO L125 PetriNetUnfolderBase]: For 463108/463115 co-relation queries the response was YES. [2024-06-20 16:48:16,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85851 conditions, 9937 events. 6120/9937 cut-off events. For 463108/463115 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 67752 event pairs, 1893 based on Foata normal form. 170/10104 useless extension candidates. Maximal degree in co-relation 85733. Up to 8059 conditions per place. [2024-06-20 16:48:16,695 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 353 selfloop transitions, 125 changer transitions 0/482 dead transitions. [2024-06-20 16:48:16,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 482 transitions, 10059 flow [2024-06-20 16:48:16,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:48:16,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:48:16,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-20 16:48:16,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-20 16:48:16,697 INFO L175 Difference]: Start difference. First operand has 240 places, 438 transitions, 8703 flow. Second operand 10 states and 195 transitions. [2024-06-20 16:48:16,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 482 transitions, 10059 flow [2024-06-20 16:48:17,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 482 transitions, 9658 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-20 16:48:17,829 INFO L231 Difference]: Finished difference. Result has 244 places, 440 transitions, 8681 flow [2024-06-20 16:48:17,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8308, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8681, PETRI_PLACES=244, PETRI_TRANSITIONS=440} [2024-06-20 16:48:17,830 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-20 16:48:17,830 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 440 transitions, 8681 flow [2024-06-20 16:48:17,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:17,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:17,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:17,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:48:17,831 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)] === [2024-06-20 16:48:17,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:17,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2025033467, now seen corresponding path program 4 times [2024-06-20 16:48:17,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:17,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757609350] [2024-06-20 16:48:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:17,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:18,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:18,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757609350] [2024-06-20 16:48:18,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757609350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:18,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:18,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:48:18,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435360074] [2024-06-20 16:48:18,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:18,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:48:18,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:18,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:48:18,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:48:19,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:48:19,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 440 transitions, 8681 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:19,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:19,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:48:19,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:21,785 INFO L124 PetriNetUnfolderBase]: 6295/10192 cut-off events. [2024-06-20 16:48:21,785 INFO L125 PetriNetUnfolderBase]: For 389979/389979 co-relation queries the response was YES. [2024-06-20 16:48:21,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88059 conditions, 10192 events. 6295/10192 cut-off events. For 389979/389979 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 69744 event pairs, 1975 based on Foata normal form. 16/10203 useless extension candidates. Maximal degree in co-relation 87939. Up to 9297 conditions per place. [2024-06-20 16:48:21,892 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 416 selfloop transitions, 80 changer transitions 0/500 dead transitions. [2024-06-20 16:48:21,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 500 transitions, 10408 flow [2024-06-20 16:48:21,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:48:21,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:48:21,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-20 16:48:21,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-20 16:48:21,893 INFO L175 Difference]: Start difference. First operand has 244 places, 440 transitions, 8681 flow. Second operand 11 states and 216 transitions. [2024-06-20 16:48:21,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 500 transitions, 10408 flow [2024-06-20 16:48:22,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 500 transitions, 10026 flow, removed 78 selfloop flow, removed 8 redundant places. [2024-06-20 16:48:22,818 INFO L231 Difference]: Finished difference. Result has 248 places, 448 transitions, 8731 flow [2024-06-20 16:48:22,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8299, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8731, PETRI_PLACES=248, PETRI_TRANSITIONS=448} [2024-06-20 16:48:22,819 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-20 16:48:22,819 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 448 transitions, 8731 flow [2024-06-20 16:48:22,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:22,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:22,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:22,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:48:22,820 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)] === [2024-06-20 16:48:22,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:22,821 INFO L85 PathProgramCache]: Analyzing trace with hash 505752537, now seen corresponding path program 7 times [2024-06-20 16:48:22,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:22,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197678007] [2024-06-20 16:48:22,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:22,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:24,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:24,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197678007] [2024-06-20 16:48:24,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197678007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:24,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:24,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:48:24,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9074702] [2024-06-20 16:48:24,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:24,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:48:24,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:24,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:48:24,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:48:24,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:48:24,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 448 transitions, 8731 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:24,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:24,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:48:24,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:27,015 INFO L124 PetriNetUnfolderBase]: 6353/10300 cut-off events. [2024-06-20 16:48:27,015 INFO L125 PetriNetUnfolderBase]: For 397631/397631 co-relation queries the response was YES. [2024-06-20 16:48:27,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88771 conditions, 10300 events. 6353/10300 cut-off events. For 397631/397631 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 70668 event pairs, 2076 based on Foata normal form. 16/10311 useless extension candidates. Maximal degree in co-relation 88650. Up to 9682 conditions per place. [2024-06-20 16:48:27,123 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 411 selfloop transitions, 75 changer transitions 0/490 dead transitions. [2024-06-20 16:48:27,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 490 transitions, 9972 flow [2024-06-20 16:48:27,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:48:27,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:48:27,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-20 16:48:27,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-20 16:48:27,124 INFO L175 Difference]: Start difference. First operand has 248 places, 448 transitions, 8731 flow. Second operand 11 states and 196 transitions. [2024-06-20 16:48:27,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 490 transitions, 9972 flow [2024-06-20 16:48:28,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 490 transitions, 9758 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-20 16:48:28,203 INFO L231 Difference]: Finished difference. Result has 252 places, 451 transitions, 8784 flow [2024-06-20 16:48:28,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8517, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8784, PETRI_PLACES=252, PETRI_TRANSITIONS=451} [2024-06-20 16:48:28,204 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 211 predicate places. [2024-06-20 16:48:28,205 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 451 transitions, 8784 flow [2024-06-20 16:48:28,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:28,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:28,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:28,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:48:28,205 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:28,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:28,206 INFO L85 PathProgramCache]: Analyzing trace with hash 505759977, now seen corresponding path program 8 times [2024-06-20 16:48:28,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:28,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966985380] [2024-06-20 16:48:28,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:28,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:29,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:29,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966985380] [2024-06-20 16:48:29,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966985380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:29,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:29,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:48:29,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995816064] [2024-06-20 16:48:29,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:29,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:48:29,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:29,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:48:29,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:48:29,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:48:29,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 451 transitions, 8784 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:29,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:29,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:48:29,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:32,145 INFO L124 PetriNetUnfolderBase]: 6394/10381 cut-off events. [2024-06-20 16:48:32,145 INFO L125 PetriNetUnfolderBase]: For 405606/405606 co-relation queries the response was YES. [2024-06-20 16:48:32,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89285 conditions, 10381 events. 6394/10381 cut-off events. For 405606/405606 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 71464 event pairs, 2100 based on Foata normal form. 12/10388 useless extension candidates. Maximal degree in co-relation 89163. Up to 9564 conditions per place. [2024-06-20 16:48:32,273 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 411 selfloop transitions, 75 changer transitions 0/490 dead transitions. [2024-06-20 16:48:32,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 490 transitions, 10004 flow [2024-06-20 16:48:32,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:48:32,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:48:32,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-20 16:48:32,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-06-20 16:48:32,275 INFO L175 Difference]: Start difference. First operand has 252 places, 451 transitions, 8784 flow. Second operand 10 states and 183 transitions. [2024-06-20 16:48:32,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 490 transitions, 10004 flow [2024-06-20 16:48:33,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 490 transitions, 9853 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-20 16:48:33,205 INFO L231 Difference]: Finished difference. Result has 254 places, 452 transitions, 8847 flow [2024-06-20 16:48:33,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8633, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8847, PETRI_PLACES=254, PETRI_TRANSITIONS=452} [2024-06-20 16:48:33,205 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-20 16:48:33,206 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 452 transitions, 8847 flow [2024-06-20 16:48:33,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:33,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:33,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:33,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:48:33,206 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:33,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:33,207 INFO L85 PathProgramCache]: Analyzing trace with hash 762260487, now seen corresponding path program 9 times [2024-06-20 16:48:33,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:33,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183114599] [2024-06-20 16:48:33,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:33,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:34,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:34,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183114599] [2024-06-20 16:48:34,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183114599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:34,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:34,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:48:34,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190388352] [2024-06-20 16:48:34,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:34,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:48:34,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:34,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:48:34,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:48:34,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:48:34,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 452 transitions, 8847 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:34,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:34,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:48:34,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:37,029 INFO L124 PetriNetUnfolderBase]: 6521/10604 cut-off events. [2024-06-20 16:48:37,030 INFO L125 PetriNetUnfolderBase]: For 435968/435968 co-relation queries the response was YES. [2024-06-20 16:48:37,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92032 conditions, 10604 events. 6521/10604 cut-off events. For 435968/435968 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 73429 event pairs, 2141 based on Foata normal form. 12/10611 useless extension candidates. Maximal degree in co-relation 91909. Up to 9726 conditions per place. [2024-06-20 16:48:37,145 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 376 selfloop transitions, 114 changer transitions 0/494 dead transitions. [2024-06-20 16:48:37,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 494 transitions, 10289 flow [2024-06-20 16:48:37,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:48:37,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:48:37,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-20 16:48:37,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-20 16:48:37,146 INFO L175 Difference]: Start difference. First operand has 254 places, 452 transitions, 8847 flow. Second operand 10 states and 185 transitions. [2024-06-20 16:48:37,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 494 transitions, 10289 flow [2024-06-20 16:48:38,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 494 transitions, 10097 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-20 16:48:38,388 INFO L231 Difference]: Finished difference. Result has 256 places, 454 transitions, 9007 flow [2024-06-20 16:48:38,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8655, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9007, PETRI_PLACES=256, PETRI_TRANSITIONS=454} [2024-06-20 16:48:38,389 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-20 16:48:38,389 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 454 transitions, 9007 flow [2024-06-20 16:48:38,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:38,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:38,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:38,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:48:38,390 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:38,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:38,390 INFO L85 PathProgramCache]: Analyzing trace with hash 2030758919, now seen corresponding path program 10 times [2024-06-20 16:48:38,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:38,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535662776] [2024-06-20 16:48:38,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:38,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:39,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:39,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535662776] [2024-06-20 16:48:39,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535662776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:39,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:39,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:48:39,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137408424] [2024-06-20 16:48:39,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:39,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:48:39,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:39,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:48:39,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:48:39,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:48:39,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 454 transitions, 9007 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:39,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:39,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:48:39,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:42,626 INFO L124 PetriNetUnfolderBase]: 7209/11800 cut-off events. [2024-06-20 16:48:42,627 INFO L125 PetriNetUnfolderBase]: For 548453/548453 co-relation queries the response was YES. [2024-06-20 16:48:42,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103027 conditions, 11800 events. 7209/11800 cut-off events. For 548453/548453 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 83732 event pairs, 2307 based on Foata normal form. 48/11843 useless extension candidates. Maximal degree in co-relation 102903. Up to 9866 conditions per place. [2024-06-20 16:48:42,998 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 411 selfloop transitions, 98 changer transitions 0/513 dead transitions. [2024-06-20 16:48:42,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 513 transitions, 10839 flow [2024-06-20 16:48:42,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:48:42,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:48:42,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-20 16:48:42,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-06-20 16:48:42,999 INFO L175 Difference]: Start difference. First operand has 256 places, 454 transitions, 9007 flow. Second operand 11 states and 218 transitions. [2024-06-20 16:48:42,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 513 transitions, 10839 flow [2024-06-20 16:48:44,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 513 transitions, 10634 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 16:48:44,219 INFO L231 Difference]: Finished difference. Result has 262 places, 461 transitions, 9303 flow [2024-06-20 16:48:44,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8802, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9303, PETRI_PLACES=262, PETRI_TRANSITIONS=461} [2024-06-20 16:48:44,220 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 221 predicate places. [2024-06-20 16:48:44,220 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 461 transitions, 9303 flow [2024-06-20 16:48:44,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:44,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:44,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:44,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:48:44,221 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:44,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:44,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2030751479, now seen corresponding path program 11 times [2024-06-20 16:48:44,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:44,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974528285] [2024-06-20 16:48:44,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:44,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:45,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:45,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:45,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974528285] [2024-06-20 16:48:45,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974528285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:45,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:45,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:48:45,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675589655] [2024-06-20 16:48:45,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:45,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:48:45,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:45,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:48:45,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:48:45,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:48:45,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 461 transitions, 9303 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:45,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:45,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:48:45,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:49,032 INFO L124 PetriNetUnfolderBase]: 7129/11691 cut-off events. [2024-06-20 16:48:49,032 INFO L125 PetriNetUnfolderBase]: For 527578/527578 co-relation queries the response was YES. [2024-06-20 16:48:49,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100479 conditions, 11691 events. 7129/11691 cut-off events. For 527578/527578 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 83025 event pairs, 2432 based on Foata normal form. 58/11744 useless extension candidates. Maximal degree in co-relation 100353. Up to 10642 conditions per place. [2024-06-20 16:48:49,158 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 407 selfloop transitions, 94 changer transitions 0/505 dead transitions. [2024-06-20 16:48:49,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 505 transitions, 10609 flow [2024-06-20 16:48:49,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:48:49,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:48:49,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-20 16:48:49,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-20 16:48:49,160 INFO L175 Difference]: Start difference. First operand has 262 places, 461 transitions, 9303 flow. Second operand 11 states and 212 transitions. [2024-06-20 16:48:49,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 505 transitions, 10609 flow [2024-06-20 16:48:50,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 505 transitions, 10353 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-20 16:48:50,619 INFO L231 Difference]: Finished difference. Result has 266 places, 461 transitions, 9246 flow [2024-06-20 16:48:50,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9047, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9246, PETRI_PLACES=266, PETRI_TRANSITIONS=461} [2024-06-20 16:48:50,620 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-20 16:48:50,620 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 461 transitions, 9246 flow [2024-06-20 16:48:50,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:50,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:50,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:50,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:48:50,621 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:50,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:50,621 INFO L85 PathProgramCache]: Analyzing trace with hash 762253047, now seen corresponding path program 12 times [2024-06-20 16:48:50,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:50,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070220237] [2024-06-20 16:48:50,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:50,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:51,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:51,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070220237] [2024-06-20 16:48:51,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070220237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:51,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:51,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:48:51,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303660053] [2024-06-20 16:48:51,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:51,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:48:51,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:51,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:48:51,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:48:51,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:48:51,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 461 transitions, 9246 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:51,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:51,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:48:51,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:55,055 INFO L124 PetriNetUnfolderBase]: 7101/11652 cut-off events. [2024-06-20 16:48:55,055 INFO L125 PetriNetUnfolderBase]: For 481668/481668 co-relation queries the response was YES. [2024-06-20 16:48:55,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99137 conditions, 11652 events. 7101/11652 cut-off events. For 481668/481668 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 82983 event pairs, 2443 based on Foata normal form. 16/11663 useless extension candidates. Maximal degree in co-relation 99009. Up to 10853 conditions per place. [2024-06-20 16:48:55,205 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 380 selfloop transitions, 112 changer transitions 0/496 dead transitions. [2024-06-20 16:48:55,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 496 transitions, 10386 flow [2024-06-20 16:48:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:48:55,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:48:55,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-20 16:48:55,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-20 16:48:55,211 INFO L175 Difference]: Start difference. First operand has 266 places, 461 transitions, 9246 flow. Second operand 10 states and 180 transitions. [2024-06-20 16:48:55,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 496 transitions, 10386 flow [2024-06-20 16:48:56,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 496 transitions, 10179 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-20 16:48:56,389 INFO L231 Difference]: Finished difference. Result has 267 places, 461 transitions, 9270 flow [2024-06-20 16:48:56,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9039, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9270, PETRI_PLACES=267, PETRI_TRANSITIONS=461} [2024-06-20 16:48:56,390 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-20 16:48:56,390 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 461 transitions, 9270 flow [2024-06-20 16:48:56,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:56,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:56,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:56,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:48:56,391 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:56,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:56,391 INFO L85 PathProgramCache]: Analyzing trace with hash 771457257, now seen corresponding path program 13 times [2024-06-20 16:48:56,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:56,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538673062] [2024-06-20 16:48:56,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:56,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:57,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:57,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538673062] [2024-06-20 16:48:57,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538673062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:57,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:57,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:48:57,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963581627] [2024-06-20 16:48:57,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:57,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:48:57,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:57,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:48:57,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:48:57,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:48:57,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 461 transitions, 9270 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:57,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:57,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:48:57,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:00,780 INFO L124 PetriNetUnfolderBase]: 7158/11755 cut-off events. [2024-06-20 16:49:00,781 INFO L125 PetriNetUnfolderBase]: For 490632/490632 co-relation queries the response was YES. [2024-06-20 16:49:00,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99778 conditions, 11755 events. 7158/11755 cut-off events. For 490632/490632 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 82877 event pairs, 2419 based on Foata normal form. 12/11762 useless extension candidates. Maximal degree in co-relation 99649. Up to 9399 conditions per place. [2024-06-20 16:49:00,906 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 364 selfloop transitions, 134 changer transitions 0/502 dead transitions. [2024-06-20 16:49:00,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 502 transitions, 10550 flow [2024-06-20 16:49:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:49:00,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:49:00,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-20 16:49:00,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-06-20 16:49:00,908 INFO L175 Difference]: Start difference. First operand has 267 places, 461 transitions, 9270 flow. Second operand 10 states and 183 transitions. [2024-06-20 16:49:00,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 502 transitions, 10550 flow [2024-06-20 16:49:02,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 502 transitions, 10315 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 16:49:02,112 INFO L231 Difference]: Finished difference. Result has 269 places, 463 transitions, 9455 flow [2024-06-20 16:49:02,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9035, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9455, PETRI_PLACES=269, PETRI_TRANSITIONS=463} [2024-06-20 16:49:02,113 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 228 predicate places. [2024-06-20 16:49:02,113 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 463 transitions, 9455 flow [2024-06-20 16:49:02,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:02,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:02,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:02,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:49:02,114 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)] === [2024-06-20 16:49:02,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:02,115 INFO L85 PathProgramCache]: Analyzing trace with hash -660377697, now seen corresponding path program 1 times [2024-06-20 16:49:02,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:02,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745466236] [2024-06-20 16:49:02,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:02,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:02,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:02,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745466236] [2024-06-20 16:49:02,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745466236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:02,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:02,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:49:02,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509361379] [2024-06-20 16:49:02,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:02,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:49:02,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:02,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:49:02,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:49:02,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:49:02,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 463 transitions, 9455 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:49:02,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:02,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:49:02,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand