./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix011.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/mix011.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix011.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix011.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 19:11:34,733 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:11:34,788 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:11:34,792 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:11:34,793 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:11:34,811 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:11:34,812 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:11:34,812 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:11:34,813 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:11:34,813 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:11:34,813 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:11:34,814 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:11:34,814 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:11:34,815 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:11:34,815 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:11:34,816 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:11:34,816 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:11:34,816 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:11:34,817 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:11:34,817 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:11:34,817 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:11:34,818 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:11:34,818 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:11:34,818 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:11:34,819 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:11:34,819 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:11:34,819 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:11:34,820 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:11:34,820 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:11:34,820 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:11:34,821 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:11:34,822 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:11:34,822 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:11:34,822 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:11:34,822 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:11:34,822 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:11:34,823 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:11:34,823 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:11:34,823 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:11:34,823 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:11:34,823 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:11:34,824 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:11:34,824 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:11:34,824 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:11:35,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:11:35,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:11:35,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:11:35,080 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:11:35,081 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:11:35,082 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix011.opt.yml/witness.yml [2024-06-03 19:11:35,259 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:11:35,260 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:11:35,261 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix011.opt.i [2024-06-03 19:11:36,480 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:11:36,731 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:11:36,731 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix011.opt.i [2024-06-03 19:11:36,757 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ef2e848c/e0e271ba0c29484c8d40b97b41672f55/FLAG2f2c158a7 [2024-06-03 19:11:37,057 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ef2e848c/e0e271ba0c29484c8d40b97b41672f55 [2024-06-03 19:11:37,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:11:37,058 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:11:37,060 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:11:37,060 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:11:37,066 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:11:37,067 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:11:35" (1/2) ... [2024-06-03 19:11:37,073 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63557a0f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:11:37, skipping insertion in model container [2024-06-03 19:11:37,075 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:11:35" (1/2) ... [2024-06-03 19:11:37,076 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@388f72a6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:11:37, skipping insertion in model container [2024-06-03 19:11:37,079 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:11:37" (2/2) ... [2024-06-03 19:11:37,079 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63557a0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:11:37, skipping insertion in model container [2024-06-03 19:11:37,079 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:11:37" (2/2) ... [2024-06-03 19:11:37,080 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:11:37,175 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:11:37,177 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((! multithreaded || z$read_delayed_var == 0) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-03 19:11:37,177 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((! multithreaded || z$read_delayed_var == 0) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-03 19:11:37,177 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((! multithreaded || z$read_delayed_var == 0) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-03 19:11:37,177 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:11:37,177 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-03 19:11:37,230 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:11:37,594 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:11:37,604 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:11:37,752 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:11:37,786 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:11:37,787 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:11:37 WrapperNode [2024-06-03 19:11:37,787 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:11:37,788 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:11:37,788 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:11:37,789 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:11:37,795 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:11:37" (1/1) ... [2024-06-03 19:11:37,825 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:11:37" (1/1) ... [2024-06-03 19:11:37,868 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 150 [2024-06-03 19:11:37,869 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:11:37,870 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:11:37,870 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:11:37,870 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:11:37,881 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:11:37" (1/1) ... [2024-06-03 19:11:37,881 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:11:37" (1/1) ... [2024-06-03 19:11:37,890 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:11:37" (1/1) ... [2024-06-03 19:11:37,906 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 19:11:37,920 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:11:37" (1/1) ... [2024-06-03 19:11:37,920 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:11:37" (1/1) ... [2024-06-03 19:11:37,930 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:11:37" (1/1) ... [2024-06-03 19:11:37,943 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:11:37" (1/1) ... [2024-06-03 19:11:37,945 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:11:37" (1/1) ... [2024-06-03 19:11:37,947 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:11:37" (1/1) ... [2024-06-03 19:11:37,951 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:11:37,952 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:11:37,952 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:11:37,952 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:11:37,953 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:11:37" (1/1) ... [2024-06-03 19:11:37,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:11:37,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:11:37,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 19:11:38,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 19:11:38,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:11:38,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:11:38,029 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:11:38,030 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:11:38,030 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:11:38,030 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:11:38,030 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:11:38,030 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:11:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:11:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:11:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:11:38,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:11:38,033 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:11:38,167 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:11:38,169 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:11:38,545 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:11:38,546 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:11:38,730 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:11:38,731 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:11:38,732 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:11:38 BoogieIcfgContainer [2024-06-03 19:11:38,732 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:11:38,735 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:11:38,736 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:11:38,739 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:11:38,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:11:35" (1/4) ... [2024-06-03 19:11:38,739 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c7e1e18 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:11:38, skipping insertion in model container [2024-06-03 19:11:38,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:11:37" (2/4) ... [2024-06-03 19:11:38,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c7e1e18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:11:38, skipping insertion in model container [2024-06-03 19:11:38,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:11:37" (3/4) ... [2024-06-03 19:11:38,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c7e1e18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:11:38, skipping insertion in model container [2024-06-03 19:11:38,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:11:38" (4/4) ... [2024-06-03 19:11:38,743 INFO L112 eAbstractionObserver]: Analyzing ICFG mix011.opt.i [2024-06-03 19:11:38,759 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:11:38,759 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 19:11:38,760 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:11:38,850 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:11:38,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-03 19:11:38,962 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-03 19:11:38,962 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:11:38,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:11:38,965 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-03 19:11:38,969 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-03 19:11:38,981 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:11:38,988 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;@2ae430c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:11:38,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 19:11:38,994 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:11:38,994 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:11:38,994 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:11:38,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:11:38,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:11:38,995 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:11:39,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:11:39,001 INFO L85 PathProgramCache]: Analyzing trace with hash -456574516, now seen corresponding path program 1 times [2024-06-03 19:11:39,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:11:39,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931441279] [2024-06-03 19:11:39,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:11:39,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:11:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:11:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:11:40,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:11:40,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931441279] [2024-06-03 19:11:40,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931441279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:11:40,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:11:40,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:11:40,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367711379] [2024-06-03 19:11:40,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:11:40,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:11:40,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:11:40,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:11:40,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:11:40,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-03 19:11:40,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:40,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:11:40,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-03 19:11:40,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:11:41,150 INFO L124 PetriNetUnfolderBase]: 1359/2140 cut-off events. [2024-06-03 19:11:41,151 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-03 19:11:41,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4256 conditions, 2140 events. 1359/2140 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11006 event pairs, 941 based on Foata normal form. 1/2063 useless extension candidates. Maximal degree in co-relation 4241. Up to 2029 conditions per place. [2024-06-03 19:11:41,171 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-03 19:11:41,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 181 flow [2024-06-03 19:11:41,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:11:41,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:11:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-03 19:11:41,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-06-03 19:11:41,184 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 80 transitions. [2024-06-03 19:11:41,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 181 flow [2024-06-03 19:11:41,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 19:11:41,190 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-03 19:11:41,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-03 19:11:41,194 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-03 19:11:41,195 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-03 19:11:41,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:41,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:11:41,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:11:41,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:11:41,196 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:11:41,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:11:41,196 INFO L85 PathProgramCache]: Analyzing trace with hash -681415701, now seen corresponding path program 1 times [2024-06-03 19:11:41,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:11:41,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304217640] [2024-06-03 19:11:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:11:41,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:11:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:11:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:11:42,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:11:42,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304217640] [2024-06-03 19:11:42,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304217640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:11:42,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:11:42,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:11:42,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992398011] [2024-06-03 19:11:42,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:11:42,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:11:42,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:11:42,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:11:42,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:11:42,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-03 19:11:42,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:42,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:11:42,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-03 19:11:42,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:11:43,000 INFO L124 PetriNetUnfolderBase]: 1560/2388 cut-off events. [2024-06-03 19:11:43,000 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2024-06-03 19:11:43,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5406 conditions, 2388 events. 1560/2388 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11944 event pairs, 930 based on Foata normal form. 3/2380 useless extension candidates. Maximal degree in co-relation 5391. Up to 2302 conditions per place. [2024-06-03 19:11:43,015 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 42 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-03 19:11:43,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 250 flow [2024-06-03 19:11:43,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:11:43,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:11:43,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-03 19:11:43,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-03 19:11:43,018 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 100 transitions. [2024-06-03 19:11:43,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 250 flow [2024-06-03 19:11:43,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:11:43,020 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-03 19:11:43,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-03 19:11:43,021 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-03 19:11:43,021 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-03 19:11:43,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:43,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:11:43,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:11:43,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:11:43,022 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:11:43,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:11:43,023 INFO L85 PathProgramCache]: Analyzing trace with hash 350950747, now seen corresponding path program 1 times [2024-06-03 19:11:43,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:11:43,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227293607] [2024-06-03 19:11:43,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:11:43,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:11:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:11:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:11:44,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:11:44,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227293607] [2024-06-03 19:11:44,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227293607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:11:44,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:11:44,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:11:44,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265188409] [2024-06-03 19:11:44,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:11:44,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:11:44,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:11:44,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:11:44,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:11:44,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-03 19:11:44,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:44,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:11:44,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-03 19:11:44,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:11:44,996 INFO L124 PetriNetUnfolderBase]: 1568/2456 cut-off events. [2024-06-03 19:11:44,996 INFO L125 PetriNetUnfolderBase]: For 1364/1364 co-relation queries the response was YES. [2024-06-03 19:11:45,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6091 conditions, 2456 events. 1568/2456 cut-off events. For 1364/1364 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12655 event pairs, 669 based on Foata normal form. 5/2458 useless extension candidates. Maximal degree in co-relation 6074. Up to 2248 conditions per place. [2024-06-03 19:11:45,013 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 55 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-03 19:11:45,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 77 transitions, 404 flow [2024-06-03 19:11:45,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:11:45,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:11:45,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-03 19:11:45,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-03 19:11:45,017 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 130 transitions. [2024-06-03 19:11:45,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 77 transitions, 404 flow [2024-06-03 19:11:45,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 390 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 19:11:45,020 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 241 flow [2024-06-03 19:11:45,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-06-03 19:11:45,021 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-06-03 19:11:45,021 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 241 flow [2024-06-03 19:11:45,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:45,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:11:45,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:11:45,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:11:45,022 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:11:45,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:11:45,023 INFO L85 PathProgramCache]: Analyzing trace with hash -2038715558, now seen corresponding path program 1 times [2024-06-03 19:11:45,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:11:45,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51744526] [2024-06-03 19:11:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:11:45,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:11:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:11:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:11:46,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:11:46,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51744526] [2024-06-03 19:11:46,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51744526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:11:46,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:11:46,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:11:46,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38729856] [2024-06-03 19:11:46,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:11:46,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:11:46,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:11:46,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:11:46,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:11:46,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-03 19:11:46,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:46,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:11:46,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-03 19:11:46,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:11:47,441 INFO L124 PetriNetUnfolderBase]: 1580/2476 cut-off events. [2024-06-03 19:11:47,441 INFO L125 PetriNetUnfolderBase]: For 3221/3223 co-relation queries the response was YES. [2024-06-03 19:11:47,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7235 conditions, 2476 events. 1580/2476 cut-off events. For 3221/3223 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12818 event pairs, 481 based on Foata normal form. 12/2485 useless extension candidates. Maximal degree in co-relation 7215. Up to 2216 conditions per place. [2024-06-03 19:11:47,459 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 59 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2024-06-03 19:11:47,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 84 transitions, 507 flow [2024-06-03 19:11:47,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:11:47,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:11:47,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 19:11:47,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-06-03 19:11:47,464 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 241 flow. Second operand 6 states and 149 transitions. [2024-06-03 19:11:47,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 84 transitions, 507 flow [2024-06-03 19:11:47,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 84 transitions, 499 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-03 19:11:47,474 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 297 flow [2024-06-03 19:11:47,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-03 19:11:47,476 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2024-06-03 19:11:47,476 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 297 flow [2024-06-03 19:11:47,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:47,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:11:47,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:11:47,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:11:47,476 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:11:47,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:11:47,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1789071829, now seen corresponding path program 1 times [2024-06-03 19:11:47,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:11:47,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092802179] [2024-06-03 19:11:47,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:11:47,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:11:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:11:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:11:48,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:11:48,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092802179] [2024-06-03 19:11:48,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092802179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:11:48,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:11:48,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:11:48,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163136589] [2024-06-03 19:11:48,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:11:48,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:11:48,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:11:48,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:11:48,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:11:48,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-03 19:11:48,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:48,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:11:48,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-03 19:11:48,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:11:48,893 INFO L124 PetriNetUnfolderBase]: 1368/2207 cut-off events. [2024-06-03 19:11:48,893 INFO L125 PetriNetUnfolderBase]: For 4097/4097 co-relation queries the response was YES. [2024-06-03 19:11:48,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6979 conditions, 2207 events. 1368/2207 cut-off events. For 4097/4097 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11659 event pairs, 562 based on Foata normal form. 2/2188 useless extension candidates. Maximal degree in co-relation 6956. Up to 2036 conditions per place. [2024-06-03 19:11:48,906 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 50 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2024-06-03 19:11:48,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 65 transitions, 441 flow [2024-06-03 19:11:48,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:11:48,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:11:48,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-03 19:11:48,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-03 19:11:48,909 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 297 flow. Second operand 5 states and 106 transitions. [2024-06-03 19:11:48,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 65 transitions, 441 flow [2024-06-03 19:11:48,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 65 transitions, 391 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 19:11:48,916 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 271 flow [2024-06-03 19:11:48,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-03 19:11:48,918 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-03 19:11:48,919 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 271 flow [2024-06-03 19:11:48,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:48,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:11:48,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:11:48,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:11:48,924 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:11:48,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:11:48,924 INFO L85 PathProgramCache]: Analyzing trace with hash -374644645, now seen corresponding path program 1 times [2024-06-03 19:11:48,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:11:48,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973522489] [2024-06-03 19:11:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:11:48,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:11:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:11:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:11:49,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:11:49,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973522489] [2024-06-03 19:11:49,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973522489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:11:49,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:11:49,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:11:49,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131376862] [2024-06-03 19:11:49,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:11:49,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:11:49,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:11:49,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:11:49,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:11:49,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:11:49,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 271 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:49,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:11:49,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:11:49,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:11:50,556 INFO L124 PetriNetUnfolderBase]: 1606/2533 cut-off events. [2024-06-03 19:11:50,557 INFO L125 PetriNetUnfolderBase]: For 5550/5550 co-relation queries the response was YES. [2024-06-03 19:11:50,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8034 conditions, 2533 events. 1606/2533 cut-off events. For 5550/5550 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13043 event pairs, 676 based on Foata normal form. 2/2526 useless extension candidates. Maximal degree in co-relation 8009. Up to 2373 conditions per place. [2024-06-03 19:11:50,578 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 55 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2024-06-03 19:11:50,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 459 flow [2024-06-03 19:11:50,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:11:50,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:11:50,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-03 19:11:50,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-03 19:11:50,579 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 271 flow. Second operand 6 states and 120 transitions. [2024-06-03 19:11:50,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 459 flow [2024-06-03 19:11:50,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 437 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 19:11:50,585 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 303 flow [2024-06-03 19:11:50,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=303, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-03 19:11:50,588 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-03 19:11:50,588 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 303 flow [2024-06-03 19:11:50,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:50,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:11:50,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:11:50,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:11:50,589 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:11:50,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:11:50,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1385399280, now seen corresponding path program 1 times [2024-06-03 19:11:50,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:11:50,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374764938] [2024-06-03 19:11:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:11:50,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:11:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:11:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:11:51,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:11:51,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374764938] [2024-06-03 19:11:51,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374764938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:11:51,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:11:51,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:11:51,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504943424] [2024-06-03 19:11:51,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:11:51,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:11:51,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:11:51,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:11:51,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:11:51,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:11:51,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 303 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:51,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:11:51,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:11:51,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:11:52,288 INFO L124 PetriNetUnfolderBase]: 1745/2696 cut-off events. [2024-06-03 19:11:52,288 INFO L125 PetriNetUnfolderBase]: For 8609/8613 co-relation queries the response was YES. [2024-06-03 19:11:52,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9315 conditions, 2696 events. 1745/2696 cut-off events. For 8609/8613 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13663 event pairs, 726 based on Foata normal form. 8/2700 useless extension candidates. Maximal degree in co-relation 9290. Up to 2505 conditions per place. [2024-06-03 19:11:52,310 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 54 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-06-03 19:11:52,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 80 transitions, 545 flow [2024-06-03 19:11:52,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:11:52,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:11:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-03 19:11:52,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-03 19:11:52,313 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 303 flow. Second operand 6 states and 129 transitions. [2024-06-03 19:11:52,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 80 transitions, 545 flow [2024-06-03 19:11:52,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 80 transitions, 515 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 19:11:52,318 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 345 flow [2024-06-03 19:11:52,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-06-03 19:11:52,319 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-06-03 19:11:52,320 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 345 flow [2024-06-03 19:11:52,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:52,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:11:52,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:11:52,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:11:52,320 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:11:52,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:11:52,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1311128692, now seen corresponding path program 2 times [2024-06-03 19:11:52,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:11:52,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989103210] [2024-06-03 19:11:52,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:11:52,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:11:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:11:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:11:53,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:11:53,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989103210] [2024-06-03 19:11:53,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989103210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:11:53,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:11:53,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:11:53,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012583305] [2024-06-03 19:11:53,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:11:53,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:11:53,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:11:53,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:11:53,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:11:53,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:11:53,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 345 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:53,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:11:53,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:11:53,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:11:53,976 INFO L124 PetriNetUnfolderBase]: 1733/2669 cut-off events. [2024-06-03 19:11:53,977 INFO L125 PetriNetUnfolderBase]: For 10388/10392 co-relation queries the response was YES. [2024-06-03 19:11:53,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9551 conditions, 2669 events. 1733/2669 cut-off events. For 10388/10392 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13484 event pairs, 740 based on Foata normal form. 3/2666 useless extension candidates. Maximal degree in co-relation 9525. Up to 2489 conditions per place. [2024-06-03 19:11:53,995 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 48 selfloop transitions, 20 changer transitions 0/75 dead transitions. [2024-06-03 19:11:53,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 519 flow [2024-06-03 19:11:53,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:11:53,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:11:53,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-03 19:11:53,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-06-03 19:11:54,001 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 345 flow. Second operand 6 states and 125 transitions. [2024-06-03 19:11:54,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 519 flow [2024-06-03 19:11:54,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 75 transitions, 490 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:11:54,008 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 364 flow [2024-06-03 19:11:54,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=364, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2024-06-03 19:11:54,010 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 21 predicate places. [2024-06-03 19:11:54,011 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 364 flow [2024-06-03 19:11:54,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:54,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:11:54,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:11:54,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:11:54,011 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:11:54,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:11:54,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1270918778, now seen corresponding path program 1 times [2024-06-03 19:11:54,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:11:54,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071855472] [2024-06-03 19:11:54,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:11:54,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:11:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:11:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:11:54,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:11:54,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071855472] [2024-06-03 19:11:54,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071855472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:11:54,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:11:54,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:11:54,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276825526] [2024-06-03 19:11:54,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:11:54,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:11:54,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:11:54,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:11:54,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:11:55,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:11:55,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 364 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:55,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:11:55,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:11:55,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:11:55,709 INFO L124 PetriNetUnfolderBase]: 1590/2517 cut-off events. [2024-06-03 19:11:55,709 INFO L125 PetriNetUnfolderBase]: For 10273/10273 co-relation queries the response was YES. [2024-06-03 19:11:55,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9020 conditions, 2517 events. 1590/2517 cut-off events. For 10273/10273 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12895 event pairs, 634 based on Foata normal form. 4/2509 useless extension candidates. Maximal degree in co-relation 8993. Up to 2330 conditions per place. [2024-06-03 19:11:55,727 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 63 selfloop transitions, 14 changer transitions 0/83 dead transitions. [2024-06-03 19:11:55,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 83 transitions, 590 flow [2024-06-03 19:11:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:11:55,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:11:55,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-03 19:11:55,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-03 19:11:55,729 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 364 flow. Second operand 7 states and 139 transitions. [2024-06-03 19:11:55,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 83 transitions, 590 flow [2024-06-03 19:11:55,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 525 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:11:55,741 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 363 flow [2024-06-03 19:11:55,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=363, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-03 19:11:55,743 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2024-06-03 19:11:55,743 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 363 flow [2024-06-03 19:11:55,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:55,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:11:55,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:11:55,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:11:55,744 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:11:55,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:11:55,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1430626116, now seen corresponding path program 1 times [2024-06-03 19:11:55,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:11:55,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261540246] [2024-06-03 19:11:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:11:55,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:11:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:11:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:11:56,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:11:56,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261540246] [2024-06-03 19:11:56,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261540246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:11:56,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:11:56,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:11:56,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191296955] [2024-06-03 19:11:56,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:11:56,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:11:56,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:11:56,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:11:56,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:11:56,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:11:56,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 363 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:56,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:11:56,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:11:56,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:11:57,478 INFO L124 PetriNetUnfolderBase]: 1856/2804 cut-off events. [2024-06-03 19:11:57,478 INFO L125 PetriNetUnfolderBase]: For 14897/14901 co-relation queries the response was YES. [2024-06-03 19:11:57,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10786 conditions, 2804 events. 1856/2804 cut-off events. For 14897/14901 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13769 event pairs, 731 based on Foata normal form. 8/2811 useless extension candidates. Maximal degree in co-relation 10758. Up to 2601 conditions per place. [2024-06-03 19:11:57,497 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 64 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-06-03 19:11:57,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 95 transitions, 695 flow [2024-06-03 19:11:57,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:11:57,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:11:57,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-03 19:11:57,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-03 19:11:57,499 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 363 flow. Second operand 7 states and 144 transitions. [2024-06-03 19:11:57,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 95 transitions, 695 flow [2024-06-03 19:11:57,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 655 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 19:11:57,508 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 442 flow [2024-06-03 19:11:57,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=442, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-03 19:11:57,508 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 24 predicate places. [2024-06-03 19:11:57,509 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 442 flow [2024-06-03 19:11:57,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:57,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:11:57,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:11:57,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:11:57,510 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:11:57,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:11:57,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1990284642, now seen corresponding path program 2 times [2024-06-03 19:11:57,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:11:57,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476057405] [2024-06-03 19:11:57,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:11:57,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:11:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:11:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:11:58,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:11:58,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476057405] [2024-06-03 19:11:58,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476057405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:11:58,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:11:58,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:11:58,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798428771] [2024-06-03 19:11:58,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:11:58,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:11:58,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:11:58,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:11:58,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:11:58,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:11:58,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 442 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:58,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:11:58,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:11:58,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:11:59,164 INFO L124 PetriNetUnfolderBase]: 1867/2816 cut-off events. [2024-06-03 19:11:59,164 INFO L125 PetriNetUnfolderBase]: For 18505/18509 co-relation queries the response was YES. [2024-06-03 19:11:59,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11655 conditions, 2816 events. 1867/2816 cut-off events. For 18505/18509 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13786 event pairs, 745 based on Foata normal form. 3/2815 useless extension candidates. Maximal degree in co-relation 11626. Up to 2608 conditions per place. [2024-06-03 19:11:59,186 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 61 selfloop transitions, 33 changer transitions 0/99 dead transitions. [2024-06-03 19:11:59,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 826 flow [2024-06-03 19:11:59,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:11:59,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:11:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-03 19:11:59,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-03 19:11:59,188 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 442 flow. Second operand 7 states and 144 transitions. [2024-06-03 19:11:59,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 826 flow [2024-06-03 19:11:59,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 99 transitions, 790 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 19:11:59,201 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 542 flow [2024-06-03 19:11:59,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=542, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-03 19:11:59,202 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-06-03 19:11:59,202 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 542 flow [2024-06-03 19:11:59,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:59,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:11:59,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:11:59,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:11:59,203 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:11:59,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:11:59,204 INFO L85 PathProgramCache]: Analyzing trace with hash 743768442, now seen corresponding path program 3 times [2024-06-03 19:11:59,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:11:59,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435719968] [2024-06-03 19:11:59,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:11:59,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:11:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:00,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:00,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435719968] [2024-06-03 19:12:00,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435719968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:00,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:00,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:12:00,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442737445] [2024-06-03 19:12:00,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:00,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:12:00,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:00,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:12:00,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:12:00,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:00,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 542 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:00,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:00,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:00,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:00,780 INFO L124 PetriNetUnfolderBase]: 1862/2809 cut-off events. [2024-06-03 19:12:00,781 INFO L125 PetriNetUnfolderBase]: For 21860/21864 co-relation queries the response was YES. [2024-06-03 19:12:00,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12115 conditions, 2809 events. 1862/2809 cut-off events. For 21860/21864 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13778 event pairs, 745 based on Foata normal form. 3/2808 useless extension candidates. Maximal degree in co-relation 12084. Up to 2605 conditions per place. [2024-06-03 19:12:00,800 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 58 selfloop transitions, 34 changer transitions 0/97 dead transitions. [2024-06-03 19:12:00,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 97 transitions, 822 flow [2024-06-03 19:12:00,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:12:00,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:12:00,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-03 19:12:00,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-03 19:12:00,803 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 542 flow. Second operand 7 states and 142 transitions. [2024-06-03 19:12:00,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 97 transitions, 822 flow [2024-06-03 19:12:00,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 97 transitions, 767 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-03 19:12:00,821 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 563 flow [2024-06-03 19:12:00,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=563, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2024-06-03 19:12:00,822 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-06-03 19:12:00,822 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 563 flow [2024-06-03 19:12:00,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:00,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:00,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:00,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:12:00,823 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:00,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:00,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1280814125, now seen corresponding path program 1 times [2024-06-03 19:12:00,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:00,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799789273] [2024-06-03 19:12:00,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:00,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:01,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:01,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799789273] [2024-06-03 19:12:01,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799789273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:01,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:01,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:12:01,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124857842] [2024-06-03 19:12:01,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:01,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:12:01,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:01,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:12:01,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:12:01,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-03 19:12:01,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 563 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:01,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:01,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-03 19:12:01,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:02,413 INFO L124 PetriNetUnfolderBase]: 1534/2474 cut-off events. [2024-06-03 19:12:02,413 INFO L125 PetriNetUnfolderBase]: For 20405/20405 co-relation queries the response was YES. [2024-06-03 19:12:02,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10598 conditions, 2474 events. 1534/2474 cut-off events. For 20405/20405 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12973 event pairs, 581 based on Foata normal form. 1/2474 useless extension candidates. Maximal degree in co-relation 10564. Up to 2252 conditions per place. [2024-06-03 19:12:02,431 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 67 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2024-06-03 19:12:02,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 755 flow [2024-06-03 19:12:02,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:12:02,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:12:02,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-06-03 19:12:02,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-03 19:12:02,433 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 563 flow. Second operand 5 states and 102 transitions. [2024-06-03 19:12:02,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 755 flow [2024-06-03 19:12:02,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 87 transitions, 667 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:12:02,448 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 525 flow [2024-06-03 19:12:02,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=525, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-03 19:12:02,449 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 31 predicate places. [2024-06-03 19:12:02,449 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 525 flow [2024-06-03 19:12:02,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:02,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:02,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:02,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:12:02,450 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:02,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:02,451 INFO L85 PathProgramCache]: Analyzing trace with hash -71126321, now seen corresponding path program 1 times [2024-06-03 19:12:02,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:02,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896298037] [2024-06-03 19:12:02,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:02,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:03,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:03,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896298037] [2024-06-03 19:12:03,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896298037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:03,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:03,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:12:03,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863953202] [2024-06-03 19:12:03,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:03,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:12:03,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:03,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:12:03,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:12:03,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:03,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 525 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:12:03,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:03,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:03,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:04,541 INFO L124 PetriNetUnfolderBase]: 1903/2883 cut-off events. [2024-06-03 19:12:04,542 INFO L125 PetriNetUnfolderBase]: For 27655/27659 co-relation queries the response was YES. [2024-06-03 19:12:04,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12925 conditions, 2883 events. 1903/2883 cut-off events. For 27655/27659 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14276 event pairs, 642 based on Foata normal form. 9/2891 useless extension candidates. Maximal degree in co-relation 12891. Up to 2522 conditions per place. [2024-06-03 19:12:04,564 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 77 selfloop transitions, 36 changer transitions 0/118 dead transitions. [2024-06-03 19:12:04,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 118 transitions, 945 flow [2024-06-03 19:12:04,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:12:04,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:12:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-03 19:12:04,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-03 19:12:04,566 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 525 flow. Second operand 8 states and 167 transitions. [2024-06-03 19:12:04,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 118 transitions, 945 flow [2024-06-03 19:12:04,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 118 transitions, 917 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-03 19:12:04,584 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 646 flow [2024-06-03 19:12:04,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=646, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-03 19:12:04,585 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 36 predicate places. [2024-06-03 19:12:04,585 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 646 flow [2024-06-03 19:12:04,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:12:04,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:04,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:04,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:12:04,586 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:04,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:04,587 INFO L85 PathProgramCache]: Analyzing trace with hash -71132118, now seen corresponding path program 1 times [2024-06-03 19:12:04,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:04,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571342273] [2024-06-03 19:12:04,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:04,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:05,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:05,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571342273] [2024-06-03 19:12:05,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571342273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:05,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:05,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:12:05,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966483665] [2024-06-03 19:12:05,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:05,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:12:05,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:05,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:12:05,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:12:05,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:05,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 646 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:05,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:05,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:05,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:06,341 INFO L124 PetriNetUnfolderBase]: 1914/2909 cut-off events. [2024-06-03 19:12:06,341 INFO L125 PetriNetUnfolderBase]: For 32077/32079 co-relation queries the response was YES. [2024-06-03 19:12:06,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13947 conditions, 2909 events. 1914/2909 cut-off events. For 32077/32079 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14481 event pairs, 691 based on Foata normal form. 4/2912 useless extension candidates. Maximal degree in co-relation 13912. Up to 2677 conditions per place. [2024-06-03 19:12:06,359 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 75 selfloop transitions, 36 changer transitions 0/116 dead transitions. [2024-06-03 19:12:06,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 116 transitions, 1028 flow [2024-06-03 19:12:06,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:12:06,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:12:06,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-03 19:12:06,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-03 19:12:06,361 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 646 flow. Second operand 7 states and 147 transitions. [2024-06-03 19:12:06,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 116 transitions, 1028 flow [2024-06-03 19:12:06,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 116 transitions, 979 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-03 19:12:06,387 INFO L231 Difference]: Finished difference. Result has 84 places, 89 transitions, 715 flow [2024-06-03 19:12:06,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=715, PETRI_PLACES=84, PETRI_TRANSITIONS=89} [2024-06-03 19:12:06,389 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 39 predicate places. [2024-06-03 19:12:06,389 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 89 transitions, 715 flow [2024-06-03 19:12:06,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:06,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:06,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:06,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:12:06,390 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:06,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:06,390 INFO L85 PathProgramCache]: Analyzing trace with hash -347173778, now seen corresponding path program 2 times [2024-06-03 19:12:06,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:06,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122363681] [2024-06-03 19:12:06,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:06,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:07,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:07,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122363681] [2024-06-03 19:12:07,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122363681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:07,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:07,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:12:07,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241217359] [2024-06-03 19:12:07,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:07,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:12:07,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:07,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:12:07,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:12:07,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:07,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 89 transitions, 715 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:07,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:07,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:07,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:08,084 INFO L124 PetriNetUnfolderBase]: 1925/2925 cut-off events. [2024-06-03 19:12:08,085 INFO L125 PetriNetUnfolderBase]: For 36206/36208 co-relation queries the response was YES. [2024-06-03 19:12:08,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14343 conditions, 2925 events. 1925/2925 cut-off events. For 36206/36208 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14508 event pairs, 686 based on Foata normal form. 4/2928 useless extension candidates. Maximal degree in co-relation 14306. Up to 2689 conditions per place. [2024-06-03 19:12:08,103 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 75 selfloop transitions, 36 changer transitions 0/116 dead transitions. [2024-06-03 19:12:08,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 116 transitions, 1099 flow [2024-06-03 19:12:08,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:12:08,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:12:08,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-03 19:12:08,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-03 19:12:08,105 INFO L175 Difference]: Start difference. First operand has 84 places, 89 transitions, 715 flow. Second operand 7 states and 143 transitions. [2024-06-03 19:12:08,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 116 transitions, 1099 flow [2024-06-03 19:12:08,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 116 transitions, 979 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 19:12:08,130 INFO L231 Difference]: Finished difference. Result has 85 places, 92 transitions, 720 flow [2024-06-03 19:12:08,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=720, PETRI_PLACES=85, PETRI_TRANSITIONS=92} [2024-06-03 19:12:08,131 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-03 19:12:08,131 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 92 transitions, 720 flow [2024-06-03 19:12:08,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:08,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:08,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:08,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:12:08,132 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:08,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:08,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1569484236, now seen corresponding path program 3 times [2024-06-03 19:12:08,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:08,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646988871] [2024-06-03 19:12:08,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:08,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:08,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:08,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646988871] [2024-06-03 19:12:08,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646988871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:08,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:08,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:12:08,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175814143] [2024-06-03 19:12:08,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:08,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:12:08,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:08,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:12:08,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:12:09,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:09,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 92 transitions, 720 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:09,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:09,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:09,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:09,703 INFO L124 PetriNetUnfolderBase]: 1920/2918 cut-off events. [2024-06-03 19:12:09,703 INFO L125 PetriNetUnfolderBase]: For 39693/39699 co-relation queries the response was YES. [2024-06-03 19:12:09,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14487 conditions, 2918 events. 1920/2918 cut-off events. For 39693/39699 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14512 event pairs, 712 based on Foata normal form. 5/2921 useless extension candidates. Maximal degree in co-relation 14450. Up to 2684 conditions per place. [2024-06-03 19:12:09,716 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 72 selfloop transitions, 34 changer transitions 0/111 dead transitions. [2024-06-03 19:12:09,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 111 transitions, 980 flow [2024-06-03 19:12:09,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:12:09,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:12:09,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-03 19:12:09,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-03 19:12:09,718 INFO L175 Difference]: Start difference. First operand has 85 places, 92 transitions, 720 flow. Second operand 7 states and 137 transitions. [2024-06-03 19:12:09,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 111 transitions, 980 flow [2024-06-03 19:12:09,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 111 transitions, 902 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 19:12:09,745 INFO L231 Difference]: Finished difference. Result has 88 places, 92 transitions, 718 flow [2024-06-03 19:12:09,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=718, PETRI_PLACES=88, PETRI_TRANSITIONS=92} [2024-06-03 19:12:09,746 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-03 19:12:09,746 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 92 transitions, 718 flow [2024-06-03 19:12:09,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:09,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:09,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:09,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:12:09,747 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:09,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:09,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1569282643, now seen corresponding path program 2 times [2024-06-03 19:12:09,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:09,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495891381] [2024-06-03 19:12:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:09,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:10,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:10,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495891381] [2024-06-03 19:12:10,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495891381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:10,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:10,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:12:10,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606279075] [2024-06-03 19:12:10,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:10,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:12:10,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:10,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:12:10,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:12:10,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:10,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 92 transitions, 718 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:12:10,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:10,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:10,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:11,612 INFO L124 PetriNetUnfolderBase]: 1942/2938 cut-off events. [2024-06-03 19:12:11,612 INFO L125 PetriNetUnfolderBase]: For 44285/44289 co-relation queries the response was YES. [2024-06-03 19:12:11,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14869 conditions, 2938 events. 1942/2938 cut-off events. For 44285/44289 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14474 event pairs, 660 based on Foata normal form. 5/2938 useless extension candidates. Maximal degree in co-relation 14831. Up to 2542 conditions per place. [2024-06-03 19:12:11,627 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 75 selfloop transitions, 49 changer transitions 0/129 dead transitions. [2024-06-03 19:12:11,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 129 transitions, 1240 flow [2024-06-03 19:12:11,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:12:11,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:12:11,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-03 19:12:11,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-03 19:12:11,629 INFO L175 Difference]: Start difference. First operand has 88 places, 92 transitions, 718 flow. Second operand 8 states and 168 transitions. [2024-06-03 19:12:11,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 129 transitions, 1240 flow [2024-06-03 19:12:11,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 129 transitions, 1139 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:12:11,650 INFO L231 Difference]: Finished difference. Result has 89 places, 98 transitions, 793 flow [2024-06-03 19:12:11,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=793, PETRI_PLACES=89, PETRI_TRANSITIONS=98} [2024-06-03 19:12:11,650 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 44 predicate places. [2024-06-03 19:12:11,650 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 98 transitions, 793 flow [2024-06-03 19:12:11,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:12:11,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:11,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:11,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:12:11,651 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:11,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:11,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1582253017, now seen corresponding path program 3 times [2024-06-03 19:12:11,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:11,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224391819] [2024-06-03 19:12:11,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:11,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:12,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:12,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224391819] [2024-06-03 19:12:12,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224391819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:12,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:12,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:12:12,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940932017] [2024-06-03 19:12:12,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:12,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:12:12,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:12,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:12:12,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:12:12,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:12,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 98 transitions, 793 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:12:12,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:12,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:12,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:13,572 INFO L124 PetriNetUnfolderBase]: 1964/2972 cut-off events. [2024-06-03 19:12:13,573 INFO L125 PetriNetUnfolderBase]: For 49469/49473 co-relation queries the response was YES. [2024-06-03 19:12:13,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15515 conditions, 2972 events. 1964/2972 cut-off events. For 49469/49473 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14718 event pairs, 660 based on Foata normal form. 5/2971 useless extension candidates. Maximal degree in co-relation 15476. Up to 2551 conditions per place. [2024-06-03 19:12:13,588 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 71 selfloop transitions, 55 changer transitions 0/131 dead transitions. [2024-06-03 19:12:13,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 131 transitions, 1297 flow [2024-06-03 19:12:13,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:12:13,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:12:13,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-03 19:12:13,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-03 19:12:13,591 INFO L175 Difference]: Start difference. First operand has 89 places, 98 transitions, 793 flow. Second operand 8 states and 167 transitions. [2024-06-03 19:12:13,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 131 transitions, 1297 flow [2024-06-03 19:12:13,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 131 transitions, 1245 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-03 19:12:13,623 INFO L231 Difference]: Finished difference. Result has 94 places, 101 transitions, 899 flow [2024-06-03 19:12:13,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=899, PETRI_PLACES=94, PETRI_TRANSITIONS=101} [2024-06-03 19:12:13,624 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-03 19:12:13,624 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 101 transitions, 899 flow [2024-06-03 19:12:13,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:12:13,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:13,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:13,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:12:13,625 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:13,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:13,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1691768301, now seen corresponding path program 4 times [2024-06-03 19:12:13,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:13,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490566677] [2024-06-03 19:12:13,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:13,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:14,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:14,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490566677] [2024-06-03 19:12:14,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490566677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:14,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:14,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:12:14,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980412802] [2024-06-03 19:12:14,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:14,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:12:14,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:14,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:12:14,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:12:14,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:14,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 101 transitions, 899 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:12:14,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:14,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:14,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:15,492 INFO L124 PetriNetUnfolderBase]: 1954/2961 cut-off events. [2024-06-03 19:12:15,492 INFO L125 PetriNetUnfolderBase]: For 53152/53156 co-relation queries the response was YES. [2024-06-03 19:12:15,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15710 conditions, 2961 events. 1954/2961 cut-off events. For 53152/53156 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14648 event pairs, 660 based on Foata normal form. 5/2961 useless extension candidates. Maximal degree in co-relation 15668. Up to 2547 conditions per place. [2024-06-03 19:12:15,509 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 72 selfloop transitions, 53 changer transitions 0/130 dead transitions. [2024-06-03 19:12:15,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 130 transitions, 1293 flow [2024-06-03 19:12:15,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:12:15,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:12:15,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-03 19:12:15,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-03 19:12:15,511 INFO L175 Difference]: Start difference. First operand has 94 places, 101 transitions, 899 flow. Second operand 8 states and 166 transitions. [2024-06-03 19:12:15,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 130 transitions, 1293 flow [2024-06-03 19:12:15,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 130 transitions, 1129 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 19:12:15,538 INFO L231 Difference]: Finished difference. Result has 96 places, 101 transitions, 849 flow [2024-06-03 19:12:15,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=849, PETRI_PLACES=96, PETRI_TRANSITIONS=101} [2024-06-03 19:12:15,539 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 51 predicate places. [2024-06-03 19:12:15,539 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 101 transitions, 849 flow [2024-06-03 19:12:15,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:12:15,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:15,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:15,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:12:15,540 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:15,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:15,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1050533193, now seen corresponding path program 1 times [2024-06-03 19:12:15,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:15,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917490142] [2024-06-03 19:12:15,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:15,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:17,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:17,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917490142] [2024-06-03 19:12:17,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917490142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:17,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:17,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:12:17,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604438976] [2024-06-03 19:12:17,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:17,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:12:17,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:17,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:12:17,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:12:17,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-03 19:12:17,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 101 transitions, 849 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:17,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:17,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-03 19:12:17,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:17,645 INFO L124 PetriNetUnfolderBase]: 1616/2617 cut-off events. [2024-06-03 19:12:17,645 INFO L125 PetriNetUnfolderBase]: For 48128/48128 co-relation queries the response was YES. [2024-06-03 19:12:17,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13579 conditions, 2617 events. 1616/2617 cut-off events. For 48128/48128 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13826 event pairs, 550 based on Foata normal form. 2/2618 useless extension candidates. Maximal degree in co-relation 13537. Up to 2362 conditions per place. [2024-06-03 19:12:17,660 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 89 selfloop transitions, 11 changer transitions 0/114 dead transitions. [2024-06-03 19:12:17,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 114 transitions, 1099 flow [2024-06-03 19:12:17,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:12:17,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:12:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-03 19:12:17,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45075757575757575 [2024-06-03 19:12:17,662 INFO L175 Difference]: Start difference. First operand has 96 places, 101 transitions, 849 flow. Second operand 6 states and 119 transitions. [2024-06-03 19:12:17,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 114 transitions, 1099 flow [2024-06-03 19:12:17,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 114 transitions, 966 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 19:12:17,695 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 776 flow [2024-06-03 19:12:17,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=776, PETRI_PLACES=94, PETRI_TRANSITIONS=104} [2024-06-03 19:12:17,695 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-03 19:12:17,695 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 776 flow [2024-06-03 19:12:17,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:17,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:17,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:17,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:12:17,696 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:17,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:17,697 INFO L85 PathProgramCache]: Analyzing trace with hash 323858279, now seen corresponding path program 1 times [2024-06-03 19:12:17,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:17,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603128779] [2024-06-03 19:12:17,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:17,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:18,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:18,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603128779] [2024-06-03 19:12:18,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603128779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:18,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:18,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:12:18,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415978770] [2024-06-03 19:12:18,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:18,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:12:18,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:18,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:12:18,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:12:18,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:12:18,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 776 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:18,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:18,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:12:18,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:19,342 INFO L124 PetriNetUnfolderBase]: 1859/2880 cut-off events. [2024-06-03 19:12:19,342 INFO L125 PetriNetUnfolderBase]: For 60730/60732 co-relation queries the response was YES. [2024-06-03 19:12:19,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15576 conditions, 2880 events. 1859/2880 cut-off events. For 60730/60732 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14649 event pairs, 444 based on Foata normal form. 6/2885 useless extension candidates. Maximal degree in co-relation 15533. Up to 2550 conditions per place. [2024-06-03 19:12:19,359 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 98 selfloop transitions, 23 changer transitions 0/134 dead transitions. [2024-06-03 19:12:19,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 134 transitions, 1210 flow [2024-06-03 19:12:19,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:12:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:12:19,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-03 19:12:19,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-03 19:12:19,362 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 776 flow. Second operand 7 states and 147 transitions. [2024-06-03 19:12:19,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 134 transitions, 1210 flow [2024-06-03 19:12:19,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 134 transitions, 1172 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:12:19,393 INFO L231 Difference]: Finished difference. Result has 97 places, 108 transitions, 843 flow [2024-06-03 19:12:19,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=843, PETRI_PLACES=97, PETRI_TRANSITIONS=108} [2024-06-03 19:12:19,393 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 52 predicate places. [2024-06-03 19:12:19,393 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 108 transitions, 843 flow [2024-06-03 19:12:19,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:19,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:19,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:19,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:12:19,394 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:19,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:19,394 INFO L85 PathProgramCache]: Analyzing trace with hash 326715239, now seen corresponding path program 2 times [2024-06-03 19:12:19,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:19,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188771713] [2024-06-03 19:12:19,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:19,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:20,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:20,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188771713] [2024-06-03 19:12:20,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188771713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:20,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:20,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:12:20,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607705247] [2024-06-03 19:12:20,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:20,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:12:20,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:20,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:12:20,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:12:20,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:12:20,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 108 transitions, 843 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:20,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:20,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:12:20,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:21,004 INFO L124 PetriNetUnfolderBase]: 1851/2868 cut-off events. [2024-06-03 19:12:21,004 INFO L125 PetriNetUnfolderBase]: For 65529/65531 co-relation queries the response was YES. [2024-06-03 19:12:21,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15878 conditions, 2868 events. 1851/2868 cut-off events. For 65529/65531 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14601 event pairs, 603 based on Foata normal form. 6/2873 useless extension candidates. Maximal degree in co-relation 15834. Up to 2615 conditions per place. [2024-06-03 19:12:21,021 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 97 selfloop transitions, 21 changer transitions 0/131 dead transitions. [2024-06-03 19:12:21,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 131 transitions, 1137 flow [2024-06-03 19:12:21,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:12:21,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:12:21,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-03 19:12:21,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-03 19:12:21,022 INFO L175 Difference]: Start difference. First operand has 97 places, 108 transitions, 843 flow. Second operand 7 states and 145 transitions. [2024-06-03 19:12:21,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 131 transitions, 1137 flow [2024-06-03 19:12:21,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 131 transitions, 1082 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 19:12:21,049 INFO L231 Difference]: Finished difference. Result has 101 places, 108 transitions, 837 flow [2024-06-03 19:12:21,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=837, PETRI_PLACES=101, PETRI_TRANSITIONS=108} [2024-06-03 19:12:21,050 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-03 19:12:21,050 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 108 transitions, 837 flow [2024-06-03 19:12:21,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:21,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:21,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:21,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:12:21,051 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:21,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:21,051 INFO L85 PathProgramCache]: Analyzing trace with hash 442011369, now seen corresponding path program 1 times [2024-06-03 19:12:21,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:21,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767219639] [2024-06-03 19:12:21,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:21,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:21,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:21,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767219639] [2024-06-03 19:12:21,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767219639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:21,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:21,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:12:21,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658825652] [2024-06-03 19:12:21,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:21,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:12:21,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:21,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:12:21,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:12:22,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:22,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 108 transitions, 837 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:22,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:22,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:22,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:22,824 INFO L124 PetriNetUnfolderBase]: 1976/3018 cut-off events. [2024-06-03 19:12:22,824 INFO L125 PetriNetUnfolderBase]: For 71406/71408 co-relation queries the response was YES. [2024-06-03 19:12:22,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16740 conditions, 3018 events. 1976/3018 cut-off events. For 71406/71408 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15175 event pairs, 589 based on Foata normal form. 4/3021 useless extension candidates. Maximal degree in co-relation 16694. Up to 2569 conditions per place. [2024-06-03 19:12:22,840 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 86 selfloop transitions, 55 changer transitions 0/146 dead transitions. [2024-06-03 19:12:22,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 146 transitions, 1331 flow [2024-06-03 19:12:22,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:12:22,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:12:22,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-03 19:12:22,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48579545454545453 [2024-06-03 19:12:22,842 INFO L175 Difference]: Start difference. First operand has 101 places, 108 transitions, 837 flow. Second operand 8 states and 171 transitions. [2024-06-03 19:12:22,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 146 transitions, 1331 flow [2024-06-03 19:12:22,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 146 transitions, 1281 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 19:12:22,877 INFO L231 Difference]: Finished difference. Result has 103 places, 111 transitions, 943 flow [2024-06-03 19:12:22,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=943, PETRI_PLACES=103, PETRI_TRANSITIONS=111} [2024-06-03 19:12:22,877 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-03 19:12:22,878 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 111 transitions, 943 flow [2024-06-03 19:12:22,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:22,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:22,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:22,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:12:22,878 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:22,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:22,879 INFO L85 PathProgramCache]: Analyzing trace with hash 442190859, now seen corresponding path program 2 times [2024-06-03 19:12:22,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:22,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902777502] [2024-06-03 19:12:22,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:22,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:23,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:23,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902777502] [2024-06-03 19:12:23,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902777502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:23,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:23,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:12:23,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483561812] [2024-06-03 19:12:23,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:23,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:12:23,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:23,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:12:23,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:12:23,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:23,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 111 transitions, 943 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:23,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:23,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:23,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:24,648 INFO L124 PetriNetUnfolderBase]: 2030/3111 cut-off events. [2024-06-03 19:12:24,648 INFO L125 PetriNetUnfolderBase]: For 79203/79205 co-relation queries the response was YES. [2024-06-03 19:12:24,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17709 conditions, 3111 events. 2030/3111 cut-off events. For 79203/79205 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15786 event pairs, 591 based on Foata normal form. 4/3114 useless extension candidates. Maximal degree in co-relation 17662. Up to 2615 conditions per place. [2024-06-03 19:12:24,666 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 89 selfloop transitions, 57 changer transitions 0/151 dead transitions. [2024-06-03 19:12:24,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 151 transitions, 1589 flow [2024-06-03 19:12:24,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:12:24,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:12:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-03 19:12:24,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-03 19:12:24,668 INFO L175 Difference]: Start difference. First operand has 103 places, 111 transitions, 943 flow. Second operand 8 states and 169 transitions. [2024-06-03 19:12:24,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 151 transitions, 1589 flow [2024-06-03 19:12:24,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 151 transitions, 1404 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 19:12:24,712 INFO L231 Difference]: Finished difference. Result has 104 places, 117 transitions, 969 flow [2024-06-03 19:12:24,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=969, PETRI_PLACES=104, PETRI_TRANSITIONS=117} [2024-06-03 19:12:24,713 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2024-06-03 19:12:24,713 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 117 transitions, 969 flow [2024-06-03 19:12:24,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:24,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:24,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:24,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:12:24,713 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:24,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:24,714 INFO L85 PathProgramCache]: Analyzing trace with hash 2122515655, now seen corresponding path program 3 times [2024-06-03 19:12:24,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:24,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617481570] [2024-06-03 19:12:24,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:24,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:25,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:25,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617481570] [2024-06-03 19:12:25,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617481570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:25,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:25,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:12:25,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137145895] [2024-06-03 19:12:25,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:25,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:12:25,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:25,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:12:25,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:12:25,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:25,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 117 transitions, 969 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:25,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:25,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:25,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:26,462 INFO L124 PetriNetUnfolderBase]: 2020/3097 cut-off events. [2024-06-03 19:12:26,463 INFO L125 PetriNetUnfolderBase]: For 83197/83199 co-relation queries the response was YES. [2024-06-03 19:12:26,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17691 conditions, 3097 events. 2020/3097 cut-off events. For 83197/83199 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15688 event pairs, 596 based on Foata normal form. 4/3100 useless extension candidates. Maximal degree in co-relation 17644. Up to 2607 conditions per place. [2024-06-03 19:12:26,485 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 89 selfloop transitions, 56 changer transitions 0/150 dead transitions. [2024-06-03 19:12:26,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 150 transitions, 1435 flow [2024-06-03 19:12:26,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:12:26,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:12:26,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-03 19:12:26,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-03 19:12:26,487 INFO L175 Difference]: Start difference. First operand has 104 places, 117 transitions, 969 flow. Second operand 8 states and 169 transitions. [2024-06-03 19:12:26,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 150 transitions, 1435 flow [2024-06-03 19:12:26,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 150 transitions, 1326 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 19:12:26,525 INFO L231 Difference]: Finished difference. Result has 108 places, 117 transitions, 980 flow [2024-06-03 19:12:26,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=980, PETRI_PLACES=108, PETRI_TRANSITIONS=117} [2024-06-03 19:12:26,525 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-06-03 19:12:26,525 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 117 transitions, 980 flow [2024-06-03 19:12:26,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:26,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:26,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:26,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:12:26,526 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:26,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:26,526 INFO L85 PathProgramCache]: Analyzing trace with hash 708855918, now seen corresponding path program 1 times [2024-06-03 19:12:26,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:26,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248106826] [2024-06-03 19:12:26,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:26,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:27,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:27,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248106826] [2024-06-03 19:12:27,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248106826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:27,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:27,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:12:27,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110163074] [2024-06-03 19:12:27,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:27,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:12:27,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:27,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:12:27,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:12:27,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:12:27,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 117 transitions, 980 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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) [2024-06-03 19:12:27,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:27,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:12:27,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:28,029 INFO L124 PetriNetUnfolderBase]: 1918/2991 cut-off events. [2024-06-03 19:12:28,029 INFO L125 PetriNetUnfolderBase]: For 88472/88472 co-relation queries the response was YES. [2024-06-03 19:12:28,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17498 conditions, 2991 events. 1918/2991 cut-off events. For 88472/88472 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15461 event pairs, 608 based on Foata normal form. 1/2991 useless extension candidates. Maximal degree in co-relation 17450. Up to 2794 conditions per place. [2024-06-03 19:12:28,044 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 111 selfloop transitions, 11 changer transitions 0/135 dead transitions. [2024-06-03 19:12:28,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 135 transitions, 1290 flow [2024-06-03 19:12:28,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:12:28,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:12:28,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-03 19:12:28,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45075757575757575 [2024-06-03 19:12:28,047 INFO L175 Difference]: Start difference. First operand has 108 places, 117 transitions, 980 flow. Second operand 6 states and 119 transitions. [2024-06-03 19:12:28,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 135 transitions, 1290 flow [2024-06-03 19:12:28,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 135 transitions, 1165 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 19:12:28,089 INFO L231 Difference]: Finished difference. Result has 107 places, 120 transitions, 917 flow [2024-06-03 19:12:28,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=917, PETRI_PLACES=107, PETRI_TRANSITIONS=120} [2024-06-03 19:12:28,090 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 62 predicate places. [2024-06-03 19:12:28,090 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 120 transitions, 917 flow [2024-06-03 19:12:28,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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) [2024-06-03 19:12:28,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:28,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:28,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:12:28,091 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)] === [2024-06-03 19:12:28,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:28,091 INFO L85 PathProgramCache]: Analyzing trace with hash -905209111, now seen corresponding path program 4 times [2024-06-03 19:12:28,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:28,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636487693] [2024-06-03 19:12:28,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:28,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:29,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:29,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636487693] [2024-06-03 19:12:29,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636487693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:29,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:29,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:12:29,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437719811] [2024-06-03 19:12:29,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:29,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:12:29,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:29,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:12:29,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:12:29,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:29,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 120 transitions, 917 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:29,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:29,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:29,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:29,960 INFO L124 PetriNetUnfolderBase]: 2079/3197 cut-off events. [2024-06-03 19:12:29,961 INFO L125 PetriNetUnfolderBase]: For 96815/96821 co-relation queries the response was YES. [2024-06-03 19:12:29,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18715 conditions, 3197 events. 2079/3197 cut-off events. For 96815/96821 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 16342 event pairs, 613 based on Foata normal form. 7/3202 useless extension candidates. Maximal degree in co-relation 18666. Up to 2660 conditions per place. [2024-06-03 19:12:29,980 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 93 selfloop transitions, 59 changer transitions 0/157 dead transitions. [2024-06-03 19:12:29,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 157 transitions, 1575 flow [2024-06-03 19:12:29,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:12:29,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:12:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-03 19:12:29,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-03 19:12:29,982 INFO L175 Difference]: Start difference. First operand has 107 places, 120 transitions, 917 flow. Second operand 8 states and 166 transitions. [2024-06-03 19:12:29,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 157 transitions, 1575 flow [2024-06-03 19:12:30,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 157 transitions, 1535 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-03 19:12:30,025 INFO L231 Difference]: Finished difference. Result has 111 places, 126 transitions, 1079 flow [2024-06-03 19:12:30,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1079, PETRI_PLACES=111, PETRI_TRANSITIONS=126} [2024-06-03 19:12:30,025 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-03 19:12:30,026 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 126 transitions, 1079 flow [2024-06-03 19:12:30,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:30,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:30,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:30,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:12:30,026 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:30,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:30,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1235376045, now seen corresponding path program 5 times [2024-06-03 19:12:30,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:30,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929253358] [2024-06-03 19:12:30,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:30,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:30,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:30,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929253358] [2024-06-03 19:12:30,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929253358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:30,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:30,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:12:30,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785171147] [2024-06-03 19:12:30,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:30,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:12:30,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:30,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:12:30,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:12:31,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:31,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 126 transitions, 1079 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:31,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:31,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:31,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:31,771 INFO L124 PetriNetUnfolderBase]: 2069/3183 cut-off events. [2024-06-03 19:12:31,771 INFO L125 PetriNetUnfolderBase]: For 102787/102793 co-relation queries the response was YES. [2024-06-03 19:12:31,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19067 conditions, 3183 events. 2069/3183 cut-off events. For 102787/102793 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16261 event pairs, 611 based on Foata normal form. 7/3188 useless extension candidates. Maximal degree in co-relation 19017. Up to 2652 conditions per place. [2024-06-03 19:12:31,800 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 90 selfloop transitions, 60 changer transitions 0/155 dead transitions. [2024-06-03 19:12:31,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 155 transitions, 1555 flow [2024-06-03 19:12:31,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:12:31,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:12:31,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-03 19:12:31,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-03 19:12:31,802 INFO L175 Difference]: Start difference. First operand has 111 places, 126 transitions, 1079 flow. Second operand 8 states and 163 transitions. [2024-06-03 19:12:31,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 155 transitions, 1555 flow [2024-06-03 19:12:31,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 155 transitions, 1388 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 19:12:31,869 INFO L231 Difference]: Finished difference. Result has 114 places, 126 transitions, 1040 flow [2024-06-03 19:12:31,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1040, PETRI_PLACES=114, PETRI_TRANSITIONS=126} [2024-06-03 19:12:31,872 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-06-03 19:12:31,872 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 126 transitions, 1040 flow [2024-06-03 19:12:31,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:31,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:31,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:31,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:12:31,873 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:31,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:31,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1631254135, now seen corresponding path program 6 times [2024-06-03 19:12:31,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:31,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824525598] [2024-06-03 19:12:31,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:31,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:32,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:32,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824525598] [2024-06-03 19:12:32,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824525598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:32,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:32,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:12:32,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330918946] [2024-06-03 19:12:32,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:32,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:12:32,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:32,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:12:32,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:12:32,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:32,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 126 transitions, 1040 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:32,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:32,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:32,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:33,517 INFO L124 PetriNetUnfolderBase]: 2059/3169 cut-off events. [2024-06-03 19:12:33,518 INFO L125 PetriNetUnfolderBase]: For 107243/107249 co-relation queries the response was YES. [2024-06-03 19:12:33,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19040 conditions, 3169 events. 2059/3169 cut-off events. For 107243/107249 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16177 event pairs, 616 based on Foata normal form. 7/3174 useless extension candidates. Maximal degree in co-relation 18989. Up to 2644 conditions per place. [2024-06-03 19:12:33,537 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 84 selfloop transitions, 63 changer transitions 0/152 dead transitions. [2024-06-03 19:12:33,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 152 transitions, 1398 flow [2024-06-03 19:12:33,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:12:33,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:12:33,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:12:33,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-03 19:12:33,539 INFO L175 Difference]: Start difference. First operand has 114 places, 126 transitions, 1040 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:12:33,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 152 transitions, 1398 flow [2024-06-03 19:12:33,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 152 transitions, 1241 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 19:12:33,580 INFO L231 Difference]: Finished difference. Result has 115 places, 126 transitions, 1017 flow [2024-06-03 19:12:33,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1017, PETRI_PLACES=115, PETRI_TRANSITIONS=126} [2024-06-03 19:12:33,581 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-03 19:12:33,581 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 126 transitions, 1017 flow [2024-06-03 19:12:33,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:33,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:33,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:33,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:12:33,581 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:33,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:33,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1793224244, now seen corresponding path program 2 times [2024-06-03 19:12:33,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:33,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673787052] [2024-06-03 19:12:33,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:33,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:34,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:34,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673787052] [2024-06-03 19:12:34,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673787052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:34,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:34,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:12:34,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141974915] [2024-06-03 19:12:34,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:34,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:12:34,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:34,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:12:34,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:12:34,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:12:34,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 126 transitions, 1017 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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) [2024-06-03 19:12:34,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:34,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:12:34,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:35,008 INFO L124 PetriNetUnfolderBase]: 1945/3050 cut-off events. [2024-06-03 19:12:35,009 INFO L125 PetriNetUnfolderBase]: For 112017/112023 co-relation queries the response was YES. [2024-06-03 19:12:35,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18727 conditions, 3050 events. 1945/3050 cut-off events. For 112017/112023 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15914 event pairs, 618 based on Foata normal form. 7/3056 useless extension candidates. Maximal degree in co-relation 18675. Up to 2830 conditions per place. [2024-06-03 19:12:35,035 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 109 selfloop transitions, 16 changer transitions 0/138 dead transitions. [2024-06-03 19:12:35,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 138 transitions, 1323 flow [2024-06-03 19:12:35,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:12:35,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:12:35,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-03 19:12:35,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2024-06-03 19:12:35,036 INFO L175 Difference]: Start difference. First operand has 115 places, 126 transitions, 1017 flow. Second operand 6 states and 115 transitions. [2024-06-03 19:12:35,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 138 transitions, 1323 flow [2024-06-03 19:12:35,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 138 transitions, 1173 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 19:12:35,100 INFO L231 Difference]: Finished difference. Result has 113 places, 129 transitions, 945 flow [2024-06-03 19:12:35,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=945, PETRI_PLACES=113, PETRI_TRANSITIONS=129} [2024-06-03 19:12:35,101 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-03 19:12:35,101 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 129 transitions, 945 flow [2024-06-03 19:12:35,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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) [2024-06-03 19:12:35,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:35,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:35,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:12:35,102 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:35,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:35,102 INFO L85 PathProgramCache]: Analyzing trace with hash -664727528, now seen corresponding path program 1 times [2024-06-03 19:12:35,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:35,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040779364] [2024-06-03 19:12:35,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:35,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:35,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:35,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040779364] [2024-06-03 19:12:35,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040779364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:35,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:35,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:12:35,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120066925] [2024-06-03 19:12:35,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:35,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:12:35,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:35,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:12:35,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:12:36,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-03 19:12:36,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 129 transitions, 945 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:36,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:36,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-03 19:12:36,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:36,501 INFO L124 PetriNetUnfolderBase]: 1721/2808 cut-off events. [2024-06-03 19:12:36,501 INFO L125 PetriNetUnfolderBase]: For 100285/100285 co-relation queries the response was YES. [2024-06-03 19:12:36,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16856 conditions, 2808 events. 1721/2808 cut-off events. For 100285/100285 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15200 event pairs, 519 based on Foata normal form. 1/2808 useless extension candidates. Maximal degree in co-relation 16803. Up to 2519 conditions per place. [2024-06-03 19:12:36,519 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 119 selfloop transitions, 11 changer transitions 0/144 dead transitions. [2024-06-03 19:12:36,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 144 transitions, 1265 flow [2024-06-03 19:12:36,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:12:36,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:12:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-03 19:12:36,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-03 19:12:36,521 INFO L175 Difference]: Start difference. First operand has 113 places, 129 transitions, 945 flow. Second operand 6 states and 121 transitions. [2024-06-03 19:12:36,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 144 transitions, 1265 flow [2024-06-03 19:12:36,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 144 transitions, 1209 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 19:12:36,575 INFO L231 Difference]: Finished difference. Result has 115 places, 132 transitions, 953 flow [2024-06-03 19:12:36,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=953, PETRI_PLACES=115, PETRI_TRANSITIONS=132} [2024-06-03 19:12:36,576 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-03 19:12:36,576 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 132 transitions, 953 flow [2024-06-03 19:12:36,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:36,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:36,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:36,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:12:36,577 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:36,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:36,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1805511769, now seen corresponding path program 1 times [2024-06-03 19:12:36,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:36,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105046919] [2024-06-03 19:12:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:36,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:37,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:37,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105046919] [2024-06-03 19:12:37,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105046919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:37,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:37,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:12:37,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823360363] [2024-06-03 19:12:37,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:37,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:12:37,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:37,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:12:37,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:12:38,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:12:38,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 132 transitions, 953 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:38,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:38,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:12:38,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:38,831 INFO L124 PetriNetUnfolderBase]: 1812/2893 cut-off events. [2024-06-03 19:12:38,832 INFO L125 PetriNetUnfolderBase]: For 105447/105447 co-relation queries the response was YES. [2024-06-03 19:12:38,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17512 conditions, 2893 events. 1812/2893 cut-off events. For 105447/105447 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 15190 event pairs, 504 based on Foata normal form. 4/2896 useless extension candidates. Maximal degree in co-relation 17458. Up to 2639 conditions per place. [2024-06-03 19:12:38,849 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 140 selfloop transitions, 19 changer transitions 0/165 dead transitions. [2024-06-03 19:12:38,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 165 transitions, 1391 flow [2024-06-03 19:12:38,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:12:38,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:12:38,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 19:12:38,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-03 19:12:38,851 INFO L175 Difference]: Start difference. First operand has 115 places, 132 transitions, 953 flow. Second operand 9 states and 174 transitions. [2024-06-03 19:12:38,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 165 transitions, 1391 flow [2024-06-03 19:12:38,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 165 transitions, 1349 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 19:12:38,901 INFO L231 Difference]: Finished difference. Result has 121 places, 137 transitions, 1016 flow [2024-06-03 19:12:38,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1016, PETRI_PLACES=121, PETRI_TRANSITIONS=137} [2024-06-03 19:12:38,901 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-03 19:12:38,901 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 137 transitions, 1016 flow [2024-06-03 19:12:38,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:38,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:38,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:38,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:12:38,902 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:38,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:38,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1793218292, now seen corresponding path program 2 times [2024-06-03 19:12:38,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:38,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895441936] [2024-06-03 19:12:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:38,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:39,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:39,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895441936] [2024-06-03 19:12:39,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895441936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:39,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:39,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:12:39,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903299472] [2024-06-03 19:12:39,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:39,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:12:39,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:39,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:12:39,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:12:39,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-03 19:12:39,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 137 transitions, 1016 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:39,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:39,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-03 19:12:39,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:40,275 INFO L124 PetriNetUnfolderBase]: 1710/2791 cut-off events. [2024-06-03 19:12:40,276 INFO L125 PetriNetUnfolderBase]: For 110503/110505 co-relation queries the response was YES. [2024-06-03 19:12:40,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17586 conditions, 2791 events. 1710/2791 cut-off events. For 110503/110505 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 15026 event pairs, 494 based on Foata normal form. 3/2793 useless extension candidates. Maximal degree in co-relation 17530. Up to 2497 conditions per place. [2024-06-03 19:12:40,298 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 119 selfloop transitions, 16 changer transitions 0/149 dead transitions. [2024-06-03 19:12:40,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 149 transitions, 1346 flow [2024-06-03 19:12:40,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:12:40,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:12:40,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-03 19:12:40,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-03 19:12:40,299 INFO L175 Difference]: Start difference. First operand has 121 places, 137 transitions, 1016 flow. Second operand 6 states and 120 transitions. [2024-06-03 19:12:40,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 149 transitions, 1346 flow [2024-06-03 19:12:40,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 149 transitions, 1281 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 19:12:40,354 INFO L231 Difference]: Finished difference. Result has 121 places, 140 transitions, 1033 flow [2024-06-03 19:12:40,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1033, PETRI_PLACES=121, PETRI_TRANSITIONS=140} [2024-06-03 19:12:40,354 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-03 19:12:40,354 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 140 transitions, 1033 flow [2024-06-03 19:12:40,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:40,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:40,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:40,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:12:40,355 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:40,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:40,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1449672911, now seen corresponding path program 1 times [2024-06-03 19:12:40,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:40,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143292191] [2024-06-03 19:12:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:40,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:41,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:41,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143292191] [2024-06-03 19:12:41,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143292191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:41,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:41,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:12:41,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794343353] [2024-06-03 19:12:41,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:41,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:12:41,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:41,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:12:41,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:12:41,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:41,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 140 transitions, 1033 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:41,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:41,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:41,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:41,956 INFO L124 PetriNetUnfolderBase]: 2067/3179 cut-off events. [2024-06-03 19:12:41,956 INFO L125 PetriNetUnfolderBase]: For 139790/139792 co-relation queries the response was YES. [2024-06-03 19:12:41,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20788 conditions, 3179 events. 2067/3179 cut-off events. For 139790/139792 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16078 event pairs, 415 based on Foata normal form. 6/3184 useless extension candidates. Maximal degree in co-relation 20731. Up to 2733 conditions per place. [2024-06-03 19:12:41,978 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 130 selfloop transitions, 40 changer transitions 0/175 dead transitions. [2024-06-03 19:12:41,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 175 transitions, 1629 flow [2024-06-03 19:12:41,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:12:41,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:12:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-03 19:12:41,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-03 19:12:41,979 INFO L175 Difference]: Start difference. First operand has 121 places, 140 transitions, 1033 flow. Second operand 8 states and 161 transitions. [2024-06-03 19:12:41,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 175 transitions, 1629 flow [2024-06-03 19:12:42,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 175 transitions, 1569 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 19:12:42,041 INFO L231 Difference]: Finished difference. Result has 125 places, 144 transitions, 1120 flow [2024-06-03 19:12:42,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1120, PETRI_PLACES=125, PETRI_TRANSITIONS=144} [2024-06-03 19:12:42,042 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2024-06-03 19:12:42,042 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 144 transitions, 1120 flow [2024-06-03 19:12:42,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:42,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:42,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:42,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:12:42,043 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:42,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:42,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1538386541, now seen corresponding path program 2 times [2024-06-03 19:12:42,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:42,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726438705] [2024-06-03 19:12:42,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:42,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:42,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:42,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726438705] [2024-06-03 19:12:42,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726438705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:42,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:42,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:12:42,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703607620] [2024-06-03 19:12:42,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:42,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:12:42,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:42,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:12:42,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:12:42,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:42,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 144 transitions, 1120 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:42,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:42,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:42,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:43,698 INFO L124 PetriNetUnfolderBase]: 2084/3206 cut-off events. [2024-06-03 19:12:43,699 INFO L125 PetriNetUnfolderBase]: For 148351/148353 co-relation queries the response was YES. [2024-06-03 19:12:43,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21421 conditions, 3206 events. 2084/3206 cut-off events. For 148351/148353 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16255 event pairs, 584 based on Foata normal form. 6/3211 useless extension candidates. Maximal degree in co-relation 21363. Up to 2913 conditions per place. [2024-06-03 19:12:43,723 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 130 selfloop transitions, 38 changer transitions 0/173 dead transitions. [2024-06-03 19:12:43,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 173 transitions, 1556 flow [2024-06-03 19:12:43,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:12:43,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:12:43,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:12:43,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-03 19:12:43,724 INFO L175 Difference]: Start difference. First operand has 125 places, 144 transitions, 1120 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:12:43,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 173 transitions, 1556 flow [2024-06-03 19:12:43,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 173 transitions, 1478 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 19:12:43,794 INFO L231 Difference]: Finished difference. Result has 129 places, 146 transitions, 1161 flow [2024-06-03 19:12:43,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1161, PETRI_PLACES=129, PETRI_TRANSITIONS=146} [2024-06-03 19:12:43,795 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 84 predicate places. [2024-06-03 19:12:43,795 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 146 transitions, 1161 flow [2024-06-03 19:12:43,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:43,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:43,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:43,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:12:43,795 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:43,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:43,796 INFO L85 PathProgramCache]: Analyzing trace with hash 678769495, now seen corresponding path program 3 times [2024-06-03 19:12:43,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:43,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938380500] [2024-06-03 19:12:43,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:43,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:44,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:44,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938380500] [2024-06-03 19:12:44,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938380500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:44,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:44,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:12:44,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129666723] [2024-06-03 19:12:44,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:44,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:12:44,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:44,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:12:44,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:12:44,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:44,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 146 transitions, 1161 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:44,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:44,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:44,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:45,591 INFO L124 PetriNetUnfolderBase]: 2101/3233 cut-off events. [2024-06-03 19:12:45,591 INFO L125 PetriNetUnfolderBase]: For 156722/156724 co-relation queries the response was YES. [2024-06-03 19:12:45,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21843 conditions, 3233 events. 2101/3233 cut-off events. For 156722/156724 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16453 event pairs, 584 based on Foata normal form. 6/3238 useless extension candidates. Maximal degree in co-relation 21783. Up to 2899 conditions per place. [2024-06-03 19:12:45,616 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 130 selfloop transitions, 41 changer transitions 0/176 dead transitions. [2024-06-03 19:12:45,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 176 transitions, 1601 flow [2024-06-03 19:12:45,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:12:45,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:12:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-03 19:12:45,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-03 19:12:45,617 INFO L175 Difference]: Start difference. First operand has 129 places, 146 transitions, 1161 flow. Second operand 8 states and 160 transitions. [2024-06-03 19:12:45,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 176 transitions, 1601 flow [2024-06-03 19:12:45,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 176 transitions, 1512 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 19:12:45,682 INFO L231 Difference]: Finished difference. Result has 131 places, 148 transitions, 1193 flow [2024-06-03 19:12:45,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1193, PETRI_PLACES=131, PETRI_TRANSITIONS=148} [2024-06-03 19:12:45,683 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2024-06-03 19:12:45,683 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 148 transitions, 1193 flow [2024-06-03 19:12:45,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:45,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:45,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:45,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:12:45,683 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:45,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:45,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1084324888, now seen corresponding path program 1 times [2024-06-03 19:12:45,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:45,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31067845] [2024-06-03 19:12:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:45,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:46,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:46,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31067845] [2024-06-03 19:12:46,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31067845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:46,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:46,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:12:46,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751144433] [2024-06-03 19:12:46,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:46,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:12:46,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:46,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:12:46,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:12:46,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:12:46,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 148 transitions, 1193 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:12:46,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:46,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:12:46,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:47,124 INFO L124 PetriNetUnfolderBase]: 2001/3138 cut-off events. [2024-06-03 19:12:47,124 INFO L125 PetriNetUnfolderBase]: For 164120/164122 co-relation queries the response was YES. [2024-06-03 19:12:47,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21638 conditions, 3138 events. 2001/3138 cut-off events. For 164120/164122 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16401 event pairs, 579 based on Foata normal form. 4/3141 useless extension candidates. Maximal degree in co-relation 21577. Up to 2824 conditions per place. [2024-06-03 19:12:47,146 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 133 selfloop transitions, 24 changer transitions 0/174 dead transitions. [2024-06-03 19:12:47,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 174 transitions, 1613 flow [2024-06-03 19:12:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:12:47,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:12:47,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-03 19:12:47,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-03 19:12:47,148 INFO L175 Difference]: Start difference. First operand has 131 places, 148 transitions, 1193 flow. Second operand 7 states and 145 transitions. [2024-06-03 19:12:47,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 174 transitions, 1613 flow [2024-06-03 19:12:47,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 174 transitions, 1514 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 19:12:47,216 INFO L231 Difference]: Finished difference. Result has 132 places, 152 transitions, 1207 flow [2024-06-03 19:12:47,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1207, PETRI_PLACES=132, PETRI_TRANSITIONS=152} [2024-06-03 19:12:47,217 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 87 predicate places. [2024-06-03 19:12:47,217 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 152 transitions, 1207 flow [2024-06-03 19:12:47,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:12:47,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:47,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:47,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:12:47,217 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:47,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:47,218 INFO L85 PathProgramCache]: Analyzing trace with hash 817297645, now seen corresponding path program 4 times [2024-06-03 19:12:47,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:47,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211118363] [2024-06-03 19:12:47,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:47,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:48,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:48,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211118363] [2024-06-03 19:12:48,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211118363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:48,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:48,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:12:48,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31290183] [2024-06-03 19:12:48,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:48,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:12:48,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:48,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:12:48,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:12:48,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:48,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 152 transitions, 1207 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:48,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:48,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:48,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:49,056 INFO L124 PetriNetUnfolderBase]: 2128/3276 cut-off events. [2024-06-03 19:12:49,056 INFO L125 PetriNetUnfolderBase]: For 173763/173765 co-relation queries the response was YES. [2024-06-03 19:12:49,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22825 conditions, 3276 events. 2128/3276 cut-off events. For 173763/173765 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16688 event pairs, 419 based on Foata normal form. 6/3281 useless extension candidates. Maximal degree in co-relation 22763. Up to 2894 conditions per place. [2024-06-03 19:12:49,076 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 137 selfloop transitions, 45 changer transitions 0/187 dead transitions. [2024-06-03 19:12:49,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 187 transitions, 1823 flow [2024-06-03 19:12:49,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:12:49,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:12:49,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-03 19:12:49,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-03 19:12:49,078 INFO L175 Difference]: Start difference. First operand has 132 places, 152 transitions, 1207 flow. Second operand 8 states and 166 transitions. [2024-06-03 19:12:49,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 187 transitions, 1823 flow [2024-06-03 19:12:49,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 187 transitions, 1738 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 19:12:49,164 INFO L231 Difference]: Finished difference. Result has 135 places, 154 transitions, 1251 flow [2024-06-03 19:12:49,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1251, PETRI_PLACES=135, PETRI_TRANSITIONS=154} [2024-06-03 19:12:49,165 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 90 predicate places. [2024-06-03 19:12:49,165 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 154 transitions, 1251 flow [2024-06-03 19:12:49,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:49,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:49,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:49,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:12:49,166 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:49,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:49,166 INFO L85 PathProgramCache]: Analyzing trace with hash 361389587, now seen corresponding path program 5 times [2024-06-03 19:12:49,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:49,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768172692] [2024-06-03 19:12:49,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:49,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:50,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:50,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768172692] [2024-06-03 19:12:50,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768172692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:50,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:50,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:12:50,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713547515] [2024-06-03 19:12:50,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:50,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:12:50,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:50,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:12:50,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:12:50,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:50,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 154 transitions, 1251 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:50,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:50,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:50,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:50,871 INFO L124 PetriNetUnfolderBase]: 2145/3303 cut-off events. [2024-06-03 19:12:50,871 INFO L125 PetriNetUnfolderBase]: For 183246/183248 co-relation queries the response was YES. [2024-06-03 19:12:50,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23291 conditions, 3303 events. 2145/3303 cut-off events. For 183246/183248 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16875 event pairs, 588 based on Foata normal form. 6/3308 useless extension candidates. Maximal degree in co-relation 23228. Up to 3008 conditions per place. [2024-06-03 19:12:50,902 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 140 selfloop transitions, 41 changer transitions 0/186 dead transitions. [2024-06-03 19:12:50,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 186 transitions, 1725 flow [2024-06-03 19:12:50,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:12:50,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:12:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-03 19:12:50,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-03 19:12:50,907 INFO L175 Difference]: Start difference. First operand has 135 places, 154 transitions, 1251 flow. Second operand 8 states and 162 transitions. [2024-06-03 19:12:50,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 186 transitions, 1725 flow [2024-06-03 19:12:51,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 186 transitions, 1602 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 19:12:51,033 INFO L231 Difference]: Finished difference. Result has 137 places, 156 transitions, 1257 flow [2024-06-03 19:12:51,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1257, PETRI_PLACES=137, PETRI_TRANSITIONS=156} [2024-06-03 19:12:51,034 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-03 19:12:51,034 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 156 transitions, 1257 flow [2024-06-03 19:12:51,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:51,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:51,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:51,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:12:51,035 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:51,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:51,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1373470829, now seen corresponding path program 6 times [2024-06-03 19:12:51,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:51,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426838114] [2024-06-03 19:12:51,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:51,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:51,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:51,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426838114] [2024-06-03 19:12:51,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426838114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:51,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:51,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:12:51,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61507796] [2024-06-03 19:12:51,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:51,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:12:51,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:51,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:12:51,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:12:52,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:52,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 156 transitions, 1257 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:52,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:52,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:52,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:52,814 INFO L124 PetriNetUnfolderBase]: 2162/3330 cut-off events. [2024-06-03 19:12:52,814 INFO L125 PetriNetUnfolderBase]: For 192370/192372 co-relation queries the response was YES. [2024-06-03 19:12:52,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23587 conditions, 3330 events. 2162/3330 cut-off events. For 192370/192372 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16992 event pairs, 588 based on Foata normal form. 6/3335 useless extension candidates. Maximal degree in co-relation 23523. Up to 3035 conditions per place. [2024-06-03 19:12:52,838 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 142 selfloop transitions, 38 changer transitions 0/185 dead transitions. [2024-06-03 19:12:52,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 185 transitions, 1721 flow [2024-06-03 19:12:52,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:12:52,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:12:52,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:12:52,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-03 19:12:52,839 INFO L175 Difference]: Start difference. First operand has 137 places, 156 transitions, 1257 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:12:52,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 185 transitions, 1721 flow [2024-06-03 19:12:52,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 185 transitions, 1618 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 19:12:52,976 INFO L231 Difference]: Finished difference. Result has 139 places, 158 transitions, 1277 flow [2024-06-03 19:12:52,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1277, PETRI_PLACES=139, PETRI_TRANSITIONS=158} [2024-06-03 19:12:52,976 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-03 19:12:52,976 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 158 transitions, 1277 flow [2024-06-03 19:12:52,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:52,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:52,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:52,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:12:52,977 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:52,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:52,977 INFO L85 PathProgramCache]: Analyzing trace with hash -168682614, now seen corresponding path program 1 times [2024-06-03 19:12:52,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:52,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194588776] [2024-06-03 19:12:52,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:52,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:54,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:54,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194588776] [2024-06-03 19:12:54,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194588776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:54,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:54,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:12:54,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175422630] [2024-06-03 19:12:54,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:54,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:12:54,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:54,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:12:54,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:12:54,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:12:54,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 158 transitions, 1277 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:12:54,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:54,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:12:54,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:54,758 INFO L124 PetriNetUnfolderBase]: 2042/3210 cut-off events. [2024-06-03 19:12:54,758 INFO L125 PetriNetUnfolderBase]: For 199212/199212 co-relation queries the response was YES. [2024-06-03 19:12:54,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23163 conditions, 3210 events. 2042/3210 cut-off events. For 199212/199212 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16902 event pairs, 574 based on Foata normal form. 1/3210 useless extension candidates. Maximal degree in co-relation 23098. Up to 2947 conditions per place. [2024-06-03 19:12:54,784 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 143 selfloop transitions, 14 changer transitions 0/177 dead transitions. [2024-06-03 19:12:54,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 177 transitions, 1667 flow [2024-06-03 19:12:54,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:12:54,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:12:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-03 19:12:54,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-03 19:12:54,785 INFO L175 Difference]: Start difference. First operand has 139 places, 158 transitions, 1277 flow. Second operand 7 states and 134 transitions. [2024-06-03 19:12:54,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 177 transitions, 1667 flow [2024-06-03 19:12:54,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 177 transitions, 1566 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 19:12:54,885 INFO L231 Difference]: Finished difference. Result has 140 places, 161 transitions, 1252 flow [2024-06-03 19:12:54,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1252, PETRI_PLACES=140, PETRI_TRANSITIONS=161} [2024-06-03 19:12:54,886 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-03 19:12:54,886 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 161 transitions, 1252 flow [2024-06-03 19:12:54,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:12:54,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:54,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:54,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:12:54,888 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:54,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:54,888 INFO L85 PathProgramCache]: Analyzing trace with hash 499697526, now seen corresponding path program 2 times [2024-06-03 19:12:54,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:54,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447647767] [2024-06-03 19:12:54,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:54,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:55,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:55,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447647767] [2024-06-03 19:12:55,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447647767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:55,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:55,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:12:55,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925603453] [2024-06-03 19:12:55,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:55,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:12:55,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:55,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:12:55,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:12:55,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:12:55,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 161 transitions, 1252 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:12:55,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:55,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:12:55,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:56,564 INFO L124 PetriNetUnfolderBase]: 2070/3257 cut-off events. [2024-06-03 19:12:56,565 INFO L125 PetriNetUnfolderBase]: For 209993/209995 co-relation queries the response was YES. [2024-06-03 19:12:56,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23887 conditions, 3257 events. 2070/3257 cut-off events. For 209993/209995 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17211 event pairs, 577 based on Foata normal form. 4/3260 useless extension candidates. Maximal degree in co-relation 23821. Up to 2895 conditions per place. [2024-06-03 19:12:56,587 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 137 selfloop transitions, 29 changer transitions 0/186 dead transitions. [2024-06-03 19:12:56,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 186 transitions, 1824 flow [2024-06-03 19:12:56,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:12:56,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:12:56,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-03 19:12:56,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-03 19:12:56,588 INFO L175 Difference]: Start difference. First operand has 140 places, 161 transitions, 1252 flow. Second operand 7 states and 141 transitions. [2024-06-03 19:12:56,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 186 transitions, 1824 flow [2024-06-03 19:12:56,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 186 transitions, 1770 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 19:12:56,706 INFO L231 Difference]: Finished difference. Result has 143 places, 169 transitions, 1402 flow [2024-06-03 19:12:56,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1402, PETRI_PLACES=143, PETRI_TRANSITIONS=169} [2024-06-03 19:12:56,706 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 98 predicate places. [2024-06-03 19:12:56,706 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 169 transitions, 1402 flow [2024-06-03 19:12:56,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:12:56,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:56,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:56,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:12:56,707 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)] === [2024-06-03 19:12:56,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:56,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1117233217, now seen corresponding path program 7 times [2024-06-03 19:12:56,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:56,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593819215] [2024-06-03 19:12:56,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:56,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:57,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:57,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:57,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593819215] [2024-06-03 19:12:57,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593819215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:57,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:57,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:12:57,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069595016] [2024-06-03 19:12:57,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:57,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:12:57,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:57,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:12:57,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:12:57,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:12:57,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 169 transitions, 1402 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:57,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:57,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:12:57,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:58,468 INFO L124 PetriNetUnfolderBase]: 2187/3371 cut-off events. [2024-06-03 19:12:58,468 INFO L125 PetriNetUnfolderBase]: For 220985/220991 co-relation queries the response was YES. [2024-06-03 19:12:58,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25149 conditions, 3371 events. 2187/3371 cut-off events. For 220985/220991 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17312 event pairs, 612 based on Foata normal form. 7/3376 useless extension candidates. Maximal degree in co-relation 25081. Up to 3069 conditions per place. [2024-06-03 19:12:58,493 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 152 selfloop transitions, 36 changer transitions 0/193 dead transitions. [2024-06-03 19:12:58,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 193 transitions, 1838 flow [2024-06-03 19:12:58,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:12:58,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:12:58,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:12:58,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-03 19:12:58,495 INFO L175 Difference]: Start difference. First operand has 143 places, 169 transitions, 1402 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:12:58,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 193 transitions, 1838 flow [2024-06-03 19:12:58,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 193 transitions, 1735 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-03 19:12:58,625 INFO L231 Difference]: Finished difference. Result has 148 places, 169 transitions, 1378 flow [2024-06-03 19:12:58,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1378, PETRI_PLACES=148, PETRI_TRANSITIONS=169} [2024-06-03 19:12:58,626 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 103 predicate places. [2024-06-03 19:12:58,626 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 169 transitions, 1378 flow [2024-06-03 19:12:58,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:58,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:58,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:58,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:12:58,626 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:58,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:58,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1098146982, now seen corresponding path program 2 times [2024-06-03 19:12:58,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:58,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925193334] [2024-06-03 19:12:58,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:58,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:59,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:59,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925193334] [2024-06-03 19:12:59,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925193334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:59,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:59,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:12:59,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407846860] [2024-06-03 19:12:59,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:59,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:12:59,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:59,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:12:59,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:12:59,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:12:59,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 169 transitions, 1378 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:12:59,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:59,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:12:59,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:00,472 INFO L124 PetriNetUnfolderBase]: 2067/3253 cut-off events. [2024-06-03 19:13:00,472 INFO L125 PetriNetUnfolderBase]: For 227913/227919 co-relation queries the response was YES. [2024-06-03 19:13:00,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24800 conditions, 3253 events. 2067/3253 cut-off events. For 227913/227919 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17192 event pairs, 580 based on Foata normal form. 7/3259 useless extension candidates. Maximal degree in co-relation 24730. Up to 2979 conditions per place. [2024-06-03 19:13:00,497 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 143 selfloop transitions, 19 changer transitions 0/182 dead transitions. [2024-06-03 19:13:00,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 182 transitions, 1772 flow [2024-06-03 19:13:00,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:13:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:13:00,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 19:13:00,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-06-03 19:13:00,499 INFO L175 Difference]: Start difference. First operand has 148 places, 169 transitions, 1378 flow. Second operand 7 states and 130 transitions. [2024-06-03 19:13:00,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 182 transitions, 1772 flow [2024-06-03 19:13:00,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 182 transitions, 1678 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 19:13:00,602 INFO L231 Difference]: Finished difference. Result has 148 places, 172 transitions, 1380 flow [2024-06-03 19:13:00,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1284, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1380, PETRI_PLACES=148, PETRI_TRANSITIONS=172} [2024-06-03 19:13:00,602 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 103 predicate places. [2024-06-03 19:13:00,602 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 172 transitions, 1380 flow [2024-06-03 19:13:00,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:13:00,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:00,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:00,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:13:00,603 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:00,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:00,604 INFO L85 PathProgramCache]: Analyzing trace with hash 244623832, now seen corresponding path program 3 times [2024-06-03 19:13:00,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:00,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723471781] [2024-06-03 19:13:00,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:00,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:01,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:01,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723471781] [2024-06-03 19:13:01,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723471781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:01,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:01,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:13:01,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303963605] [2024-06-03 19:13:01,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:01,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:13:01,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:01,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:13:01,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:13:01,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:13:01,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 172 transitions, 1380 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:13:01,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:01,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:13:01,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:02,188 INFO L124 PetriNetUnfolderBase]: 2071/3260 cut-off events. [2024-06-03 19:13:02,188 INFO L125 PetriNetUnfolderBase]: For 236903/236905 co-relation queries the response was YES. [2024-06-03 19:13:02,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25185 conditions, 3260 events. 2071/3260 cut-off events. For 236903/236905 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17237 event pairs, 592 based on Foata normal form. 4/3263 useless extension candidates. Maximal degree in co-relation 25114. Up to 2869 conditions per place. [2024-06-03 19:13:02,213 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 131 selfloop transitions, 44 changer transitions 0/195 dead transitions. [2024-06-03 19:13:02,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 195 transitions, 2098 flow [2024-06-03 19:13:02,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:13:02,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:13:02,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:13:02,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-03 19:13:02,214 INFO L175 Difference]: Start difference. First operand has 148 places, 172 transitions, 1380 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:13:02,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 195 transitions, 2098 flow [2024-06-03 19:13:02,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 195 transitions, 2022 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 19:13:02,361 INFO L231 Difference]: Finished difference. Result has 153 places, 182 transitions, 1574 flow [2024-06-03 19:13:02,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1306, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1574, PETRI_PLACES=153, PETRI_TRANSITIONS=182} [2024-06-03 19:13:02,362 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 108 predicate places. [2024-06-03 19:13:02,362 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 182 transitions, 1574 flow [2024-06-03 19:13:02,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:13:02,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:02,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:02,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 19:13:02,362 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:02,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:02,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1786193000, now seen corresponding path program 3 times [2024-06-03 19:13:02,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:02,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794959938] [2024-06-03 19:13:02,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:02,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:03,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:03,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:03,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794959938] [2024-06-03 19:13:03,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794959938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:03,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:03,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:13:03,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946854668] [2024-06-03 19:13:03,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:03,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:13:03,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:03,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:13:03,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:13:03,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:13:03,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 182 transitions, 1574 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:13:03,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:03,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:13:03,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:04,263 INFO L124 PetriNetUnfolderBase]: 2081/3259 cut-off events. [2024-06-03 19:13:04,263 INFO L125 PetriNetUnfolderBase]: For 248143/248149 co-relation queries the response was YES. [2024-06-03 19:13:04,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25969 conditions, 3259 events. 2081/3259 cut-off events. For 248143/248149 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 16961 event pairs, 584 based on Foata normal form. 7/3265 useless extension candidates. Maximal degree in co-relation 25895. Up to 2985 conditions per place. [2024-06-03 19:13:04,293 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 151 selfloop transitions, 27 changer transitions 0/198 dead transitions. [2024-06-03 19:13:04,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 198 transitions, 2027 flow [2024-06-03 19:13:04,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:13:04,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:13:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-03 19:13:04,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-03 19:13:04,295 INFO L175 Difference]: Start difference. First operand has 153 places, 182 transitions, 1574 flow. Second operand 7 states and 131 transitions. [2024-06-03 19:13:04,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 198 transitions, 2027 flow [2024-06-03 19:13:04,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 198 transitions, 1893 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-03 19:13:04,447 INFO L231 Difference]: Finished difference. Result has 158 places, 188 transitions, 1592 flow [2024-06-03 19:13:04,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1440, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1592, PETRI_PLACES=158, PETRI_TRANSITIONS=188} [2024-06-03 19:13:04,447 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2024-06-03 19:13:04,448 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 188 transitions, 1592 flow [2024-06-03 19:13:04,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:13:04,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:04,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:04,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 19:13:04,448 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:04,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:04,448 INFO L85 PathProgramCache]: Analyzing trace with hash 8453680, now seen corresponding path program 1 times [2024-06-03 19:13:04,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:04,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090610709] [2024-06-03 19:13:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:04,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:05,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:05,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090610709] [2024-06-03 19:13:05,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090610709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:05,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:05,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:13:05,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292997541] [2024-06-03 19:13:05,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:05,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:13:05,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:05,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:13:05,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:13:05,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:13:05,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 188 transitions, 1592 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:13:05,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:05,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:13:05,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:05,935 INFO L124 PetriNetUnfolderBase]: 2059/3237 cut-off events. [2024-06-03 19:13:05,935 INFO L125 PetriNetUnfolderBase]: For 259202/259202 co-relation queries the response was YES. [2024-06-03 19:13:05,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25950 conditions, 3237 events. 2059/3237 cut-off events. For 259202/259202 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16845 event pairs, 528 based on Foata normal form. 1/3237 useless extension candidates. Maximal degree in co-relation 25873. Up to 2993 conditions per place. [2024-06-03 19:13:05,962 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 182 selfloop transitions, 16 changer transitions 0/208 dead transitions. [2024-06-03 19:13:05,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 208 transitions, 2082 flow [2024-06-03 19:13:05,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:13:05,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:13:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 19:13:05,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-03 19:13:05,963 INFO L175 Difference]: Start difference. First operand has 158 places, 188 transitions, 1592 flow. Second operand 8 states and 146 transitions. [2024-06-03 19:13:05,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 208 transitions, 2082 flow [2024-06-03 19:13:06,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 208 transitions, 2014 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-03 19:13:06,136 INFO L231 Difference]: Finished difference. Result has 164 places, 193 transitions, 1629 flow [2024-06-03 19:13:06,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1629, PETRI_PLACES=164, PETRI_TRANSITIONS=193} [2024-06-03 19:13:06,136 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 119 predicate places. [2024-06-03 19:13:06,136 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 193 transitions, 1629 flow [2024-06-03 19:13:06,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:13:06,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:06,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:06,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 19:13:06,137 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:06,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:06,137 INFO L85 PathProgramCache]: Analyzing trace with hash 2142870976, now seen corresponding path program 2 times [2024-06-03 19:13:06,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:06,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761858871] [2024-06-03 19:13:06,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:06,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:07,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:07,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761858871] [2024-06-03 19:13:07,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761858871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:07,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:07,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:13:07,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540945910] [2024-06-03 19:13:07,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:07,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:13:07,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:07,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:13:07,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:13:07,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:13:07,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 193 transitions, 1629 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:13:07,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:07,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:13:07,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:07,641 INFO L124 PetriNetUnfolderBase]: 2064/3244 cut-off events. [2024-06-03 19:13:07,641 INFO L125 PetriNetUnfolderBase]: For 269219/269219 co-relation queries the response was YES. [2024-06-03 19:13:07,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26496 conditions, 3244 events. 2064/3244 cut-off events. For 269219/269219 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16870 event pairs, 528 based on Foata normal form. 1/3244 useless extension candidates. Maximal degree in co-relation 26416. Up to 2994 conditions per place. [2024-06-03 19:13:07,670 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 178 selfloop transitions, 20 changer transitions 0/208 dead transitions. [2024-06-03 19:13:07,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 208 transitions, 2105 flow [2024-06-03 19:13:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:13:07,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:13:07,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 19:13:07,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-03 19:13:07,671 INFO L175 Difference]: Start difference. First operand has 164 places, 193 transitions, 1629 flow. Second operand 7 states and 133 transitions. [2024-06-03 19:13:07,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 208 transitions, 2105 flow [2024-06-03 19:13:07,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 208 transitions, 2041 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 19:13:07,830 INFO L231 Difference]: Finished difference. Result has 166 places, 196 transitions, 1667 flow [2024-06-03 19:13:07,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1565, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1667, PETRI_PLACES=166, PETRI_TRANSITIONS=196} [2024-06-03 19:13:07,831 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 121 predicate places. [2024-06-03 19:13:07,831 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 196 transitions, 1667 flow [2024-06-03 19:13:07,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:13:07,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:07,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:07,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 19:13:07,832 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:07,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:07,832 INFO L85 PathProgramCache]: Analyzing trace with hash 868284094, now seen corresponding path program 1 times [2024-06-03 19:13:07,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:07,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856052311] [2024-06-03 19:13:07,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:07,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:08,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:08,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856052311] [2024-06-03 19:13:08,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856052311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:08,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:08,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:13:08,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211766568] [2024-06-03 19:13:08,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:08,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:13:08,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:08,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:13:08,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:13:09,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-03 19:13:09,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 196 transitions, 1667 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:09,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:09,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-03 19:13:09,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:09,664 INFO L124 PetriNetUnfolderBase]: 1982/3168 cut-off events. [2024-06-03 19:13:09,664 INFO L125 PetriNetUnfolderBase]: For 282179/282179 co-relation queries the response was YES. [2024-06-03 19:13:09,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26492 conditions, 3168 events. 1982/3168 cut-off events. For 282179/282179 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 16854 event pairs, 527 based on Foata normal form. 3/3170 useless extension candidates. Maximal degree in co-relation 26411. Up to 2791 conditions per place. [2024-06-03 19:13:09,693 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 170 selfloop transitions, 15 changer transitions 0/212 dead transitions. [2024-06-03 19:13:09,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 212 transitions, 2113 flow [2024-06-03 19:13:09,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:13:09,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:13:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-03 19:13:09,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-03 19:13:09,694 INFO L175 Difference]: Start difference. First operand has 166 places, 196 transitions, 1667 flow. Second operand 7 states and 138 transitions. [2024-06-03 19:13:09,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 212 transitions, 2113 flow [2024-06-03 19:13:09,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 212 transitions, 2033 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 19:13:09,891 INFO L231 Difference]: Finished difference. Result has 168 places, 199 transitions, 1673 flow [2024-06-03 19:13:09,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1587, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1673, PETRI_PLACES=168, PETRI_TRANSITIONS=199} [2024-06-03 19:13:09,891 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 123 predicate places. [2024-06-03 19:13:09,891 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 199 transitions, 1673 flow [2024-06-03 19:13:09,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:09,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:09,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:09,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 19:13:09,892 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:09,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:09,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1098331494, now seen corresponding path program 2 times [2024-06-03 19:13:09,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:09,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442585774] [2024-06-03 19:13:09,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:09,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:11,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:11,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442585774] [2024-06-03 19:13:11,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442585774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:11,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:11,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:13:11,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055080435] [2024-06-03 19:13:11,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:11,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:13:11,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:11,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:13:11,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:13:11,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-03 19:13:11,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 199 transitions, 1673 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:11,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:11,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-03 19:13:11,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:11,717 INFO L124 PetriNetUnfolderBase]: 1992/3185 cut-off events. [2024-06-03 19:13:11,717 INFO L125 PetriNetUnfolderBase]: For 292405/292407 co-relation queries the response was YES. [2024-06-03 19:13:11,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27061 conditions, 3185 events. 1992/3185 cut-off events. For 292405/292407 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 16944 event pairs, 531 based on Foata normal form. 5/3189 useless extension candidates. Maximal degree in co-relation 26979. Up to 2799 conditions per place. [2024-06-03 19:13:11,746 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 165 selfloop transitions, 20 changer transitions 0/212 dead transitions. [2024-06-03 19:13:11,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 212 transitions, 2117 flow [2024-06-03 19:13:11,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:13:11,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:13:11,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-03 19:13:11,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-03 19:13:11,747 INFO L175 Difference]: Start difference. First operand has 168 places, 199 transitions, 1673 flow. Second operand 7 states and 137 transitions. [2024-06-03 19:13:11,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 212 transitions, 2117 flow [2024-06-03 19:13:11,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 212 transitions, 2053 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 19:13:11,981 INFO L231 Difference]: Finished difference. Result has 170 places, 202 transitions, 1711 flow [2024-06-03 19:13:11,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1609, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1711, PETRI_PLACES=170, PETRI_TRANSITIONS=202} [2024-06-03 19:13:11,981 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 125 predicate places. [2024-06-03 19:13:11,981 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 202 transitions, 1711 flow [2024-06-03 19:13:11,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:11,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:11,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:11,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 19:13:11,982 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:11,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:11,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1098331246, now seen corresponding path program 3 times [2024-06-03 19:13:11,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:11,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492904326] [2024-06-03 19:13:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:11,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:12,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:12,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492904326] [2024-06-03 19:13:12,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492904326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:12,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:12,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:13:12,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455684026] [2024-06-03 19:13:12,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:12,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:13:12,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:12,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:13:12,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:13:13,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:13:13,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 202 transitions, 1711 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:13:13,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:13,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:13:13,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:13,526 INFO L124 PetriNetUnfolderBase]: 2081/3274 cut-off events. [2024-06-03 19:13:13,527 INFO L125 PetriNetUnfolderBase]: For 299103/299105 co-relation queries the response was YES. [2024-06-03 19:13:13,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27984 conditions, 3274 events. 2081/3274 cut-off events. For 299103/299105 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17069 event pairs, 535 based on Foata normal form. 3/3276 useless extension candidates. Maximal degree in co-relation 27901. Up to 3009 conditions per place. [2024-06-03 19:13:13,556 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 177 selfloop transitions, 27 changer transitions 0/214 dead transitions. [2024-06-03 19:13:13,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 214 transitions, 2201 flow [2024-06-03 19:13:13,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:13:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:13:13,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-03 19:13:13,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:13:13,559 INFO L175 Difference]: Start difference. First operand has 170 places, 202 transitions, 1711 flow. Second operand 7 states and 132 transitions. [2024-06-03 19:13:13,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 214 transitions, 2201 flow [2024-06-03 19:13:13,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 214 transitions, 2121 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 19:13:13,775 INFO L231 Difference]: Finished difference. Result has 172 places, 205 transitions, 1757 flow [2024-06-03 19:13:13,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1757, PETRI_PLACES=172, PETRI_TRANSITIONS=205} [2024-06-03 19:13:13,775 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 127 predicate places. [2024-06-03 19:13:13,775 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 205 transitions, 1757 flow [2024-06-03 19:13:13,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:13:13,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:13,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:13,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 19:13:13,776 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:13,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:13,776 INFO L85 PathProgramCache]: Analyzing trace with hash 874779214, now seen corresponding path program 3 times [2024-06-03 19:13:13,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:13,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73681917] [2024-06-03 19:13:13,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:13,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:14,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:14,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73681917] [2024-06-03 19:13:14,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73681917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:14,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:14,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:13:14,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649318775] [2024-06-03 19:13:14,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:14,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:13:14,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:14,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:13:14,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:13:15,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-03 19:13:15,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 205 transitions, 1757 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:15,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:15,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-03 19:13:15,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:15,612 INFO L124 PetriNetUnfolderBase]: 1980/3169 cut-off events. [2024-06-03 19:13:15,613 INFO L125 PetriNetUnfolderBase]: For 307299/307301 co-relation queries the response was YES. [2024-06-03 19:13:15,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27526 conditions, 3169 events. 1980/3169 cut-off events. For 307299/307301 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 16978 event pairs, 529 based on Foata normal form. 5/3173 useless extension candidates. Maximal degree in co-relation 27442. Up to 2763 conditions per place. [2024-06-03 19:13:15,642 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 161 selfloop transitions, 30 changer transitions 0/219 dead transitions. [2024-06-03 19:13:15,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 219 transitions, 2223 flow [2024-06-03 19:13:15,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:13:15,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:13:15,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-03 19:13:15,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-03 19:13:15,643 INFO L175 Difference]: Start difference. First operand has 172 places, 205 transitions, 1757 flow. Second operand 7 states and 139 transitions. [2024-06-03 19:13:15,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 219 transitions, 2223 flow [2024-06-03 19:13:15,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 219 transitions, 2119 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-03 19:13:15,907 INFO L231 Difference]: Finished difference. Result has 174 places, 208 transitions, 1784 flow [2024-06-03 19:13:15,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1784, PETRI_PLACES=174, PETRI_TRANSITIONS=208} [2024-06-03 19:13:15,907 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 129 predicate places. [2024-06-03 19:13:15,908 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 208 transitions, 1784 flow [2024-06-03 19:13:15,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:15,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:15,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:15,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 19:13:15,908 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:15,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:15,909 INFO L85 PathProgramCache]: Analyzing trace with hash 445521030, now seen corresponding path program 1 times [2024-06-03 19:13:15,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:15,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958619486] [2024-06-03 19:13:15,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:15,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:16,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:16,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958619486] [2024-06-03 19:13:16,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958619486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:16,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:16,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:13:16,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535633998] [2024-06-03 19:13:16,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:16,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:13:16,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:16,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:13:16,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:13:16,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:16,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 208 transitions, 1784 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:16,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:16,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:16,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:17,989 INFO L124 PetriNetUnfolderBase]: 2313/3573 cut-off events. [2024-06-03 19:13:17,990 INFO L125 PetriNetUnfolderBase]: For 342463/342465 co-relation queries the response was YES. [2024-06-03 19:13:18,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30258 conditions, 3573 events. 2313/3573 cut-off events. For 342463/342465 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 18559 event pairs, 460 based on Foata normal form. 24/3596 useless extension candidates. Maximal degree in co-relation 30173. Up to 2904 conditions per place. [2024-06-03 19:13:18,017 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 173 selfloop transitions, 67 changer transitions 0/245 dead transitions. [2024-06-03 19:13:18,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 245 transitions, 2418 flow [2024-06-03 19:13:18,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:13:18,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:13:18,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-03 19:13:18,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-03 19:13:18,019 INFO L175 Difference]: Start difference. First operand has 174 places, 208 transitions, 1784 flow. Second operand 9 states and 186 transitions. [2024-06-03 19:13:18,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 245 transitions, 2418 flow [2024-06-03 19:13:18,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 245 transitions, 2311 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 19:13:18,235 INFO L231 Difference]: Finished difference. Result has 178 places, 210 transitions, 1871 flow [2024-06-03 19:13:18,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1871, PETRI_PLACES=178, PETRI_TRANSITIONS=210} [2024-06-03 19:13:18,236 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 133 predicate places. [2024-06-03 19:13:18,236 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 210 transitions, 1871 flow [2024-06-03 19:13:18,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:18,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:18,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:18,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 19:13:18,237 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:18,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:18,237 INFO L85 PathProgramCache]: Analyzing trace with hash -807488480, now seen corresponding path program 2 times [2024-06-03 19:13:18,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:18,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420149860] [2024-06-03 19:13:18,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:18,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:19,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:19,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420149860] [2024-06-03 19:13:19,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420149860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:19,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:19,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:13:19,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396592228] [2024-06-03 19:13:19,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:19,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:13:19,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:19,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:13:19,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:13:19,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:19,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 210 transitions, 1871 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:19,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:19,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:19,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:20,303 INFO L124 PetriNetUnfolderBase]: 2371/3681 cut-off events. [2024-06-03 19:13:20,303 INFO L125 PetriNetUnfolderBase]: For 348517/348519 co-relation queries the response was YES. [2024-06-03 19:13:20,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31256 conditions, 3681 events. 2371/3681 cut-off events. For 348517/348519 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 19381 event pairs, 460 based on Foata normal form. 16/3696 useless extension candidates. Maximal degree in co-relation 31170. Up to 2892 conditions per place. [2024-06-03 19:13:20,333 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 176 selfloop transitions, 69 changer transitions 0/250 dead transitions. [2024-06-03 19:13:20,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 250 transitions, 2507 flow [2024-06-03 19:13:20,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:13:20,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:13:20,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-03 19:13:20,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-03 19:13:20,336 INFO L175 Difference]: Start difference. First operand has 178 places, 210 transitions, 1871 flow. Second operand 9 states and 189 transitions. [2024-06-03 19:13:20,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 250 transitions, 2507 flow [2024-06-03 19:13:20,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 250 transitions, 2341 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-03 19:13:20,554 INFO L231 Difference]: Finished difference. Result has 180 places, 211 transitions, 1877 flow [2024-06-03 19:13:20,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1705, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1877, PETRI_PLACES=180, PETRI_TRANSITIONS=211} [2024-06-03 19:13:20,555 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 135 predicate places. [2024-06-03 19:13:20,555 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 211 transitions, 1877 flow [2024-06-03 19:13:20,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:20,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:20,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:20,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 19:13:20,555 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:20,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:20,555 INFO L85 PathProgramCache]: Analyzing trace with hash 2048280616, now seen corresponding path program 3 times [2024-06-03 19:13:20,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:20,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926556665] [2024-06-03 19:13:20,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:20,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:21,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:21,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926556665] [2024-06-03 19:13:21,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926556665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:21,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:21,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:13:21,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303154482] [2024-06-03 19:13:21,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:21,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:13:21,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:21,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:13:21,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:13:21,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:21,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 211 transitions, 1877 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:21,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:21,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:21,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:22,382 INFO L124 PetriNetUnfolderBase]: 2429/3789 cut-off events. [2024-06-03 19:13:22,382 INFO L125 PetriNetUnfolderBase]: For 362191/362193 co-relation queries the response was YES. [2024-06-03 19:13:22,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31755 conditions, 3789 events. 2429/3789 cut-off events. For 362191/362193 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 20222 event pairs, 473 based on Foata normal form. 16/3804 useless extension candidates. Maximal degree in co-relation 31668. Up to 2857 conditions per place. [2024-06-03 19:13:22,414 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 175 selfloop transitions, 72 changer transitions 0/252 dead transitions. [2024-06-03 19:13:22,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 252 transitions, 2521 flow [2024-06-03 19:13:22,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:13:22,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:13:22,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-03 19:13:22,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-03 19:13:22,415 INFO L175 Difference]: Start difference. First operand has 180 places, 211 transitions, 1877 flow. Second operand 9 states and 190 transitions. [2024-06-03 19:13:22,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 252 transitions, 2521 flow [2024-06-03 19:13:22,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 252 transitions, 2365 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 19:13:22,650 INFO L231 Difference]: Finished difference. Result has 182 places, 212 transitions, 1901 flow [2024-06-03 19:13:22,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1901, PETRI_PLACES=182, PETRI_TRANSITIONS=212} [2024-06-03 19:13:22,650 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 137 predicate places. [2024-06-03 19:13:22,650 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 212 transitions, 1901 flow [2024-06-03 19:13:22,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:22,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:22,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:22,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 19:13:22,651 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:22,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:22,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1990188166, now seen corresponding path program 4 times [2024-06-03 19:13:22,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:22,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738220305] [2024-06-03 19:13:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:22,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:23,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:23,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738220305] [2024-06-03 19:13:23,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738220305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:23,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:23,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:13:23,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347002399] [2024-06-03 19:13:23,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:23,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:13:23,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:23,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:13:23,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:13:23,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:23,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 212 transitions, 1901 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:23,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:23,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:23,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:24,679 INFO L124 PetriNetUnfolderBase]: 2573/4049 cut-off events. [2024-06-03 19:13:24,679 INFO L125 PetriNetUnfolderBase]: For 394702/394704 co-relation queries the response was YES. [2024-06-03 19:13:24,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34018 conditions, 4049 events. 2573/4049 cut-off events. For 394702/394704 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 22176 event pairs, 417 based on Foata normal form. 16/4064 useless extension candidates. Maximal degree in co-relation 33930. Up to 2495 conditions per place. [2024-06-03 19:13:24,717 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 176 selfloop transitions, 76 changer transitions 0/257 dead transitions. [2024-06-03 19:13:24,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 257 transitions, 2803 flow [2024-06-03 19:13:24,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:13:24,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:13:24,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-03 19:13:24,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-03 19:13:24,719 INFO L175 Difference]: Start difference. First operand has 182 places, 212 transitions, 1901 flow. Second operand 9 states and 189 transitions. [2024-06-03 19:13:24,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 257 transitions, 2803 flow [2024-06-03 19:13:24,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 257 transitions, 2639 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 19:13:25,001 INFO L231 Difference]: Finished difference. Result has 184 places, 214 transitions, 1957 flow [2024-06-03 19:13:25,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1737, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1957, PETRI_PLACES=184, PETRI_TRANSITIONS=214} [2024-06-03 19:13:25,001 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 139 predicate places. [2024-06-03 19:13:25,001 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 214 transitions, 1957 flow [2024-06-03 19:13:25,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:25,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:25,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:25,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 19:13:25,002 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:25,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:25,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1700344446, now seen corresponding path program 1 times [2024-06-03 19:13:25,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:25,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316006149] [2024-06-03 19:13:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:25,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:26,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:26,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316006149] [2024-06-03 19:13:26,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316006149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:26,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:26,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:13:26,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32355673] [2024-06-03 19:13:26,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:26,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:13:26,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:26,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:13:26,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:13:26,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:13:26,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 214 transitions, 1957 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:26,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:26,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:13:26,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:27,061 INFO L124 PetriNetUnfolderBase]: 2434/3905 cut-off events. [2024-06-03 19:13:27,062 INFO L125 PetriNetUnfolderBase]: For 390976/390978 co-relation queries the response was YES. [2024-06-03 19:13:27,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33473 conditions, 3905 events. 2434/3905 cut-off events. For 390976/390978 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 22055 event pairs, 666 based on Foata normal form. 4/3896 useless extension candidates. Maximal degree in co-relation 33384. Up to 3516 conditions per place. [2024-06-03 19:13:27,099 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 186 selfloop transitions, 30 changer transitions 0/239 dead transitions. [2024-06-03 19:13:27,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 239 transitions, 2520 flow [2024-06-03 19:13:27,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:13:27,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:13:27,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-03 19:13:27,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-03 19:13:27,101 INFO L175 Difference]: Start difference. First operand has 184 places, 214 transitions, 1957 flow. Second operand 8 states and 161 transitions. [2024-06-03 19:13:27,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 239 transitions, 2520 flow [2024-06-03 19:13:27,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 239 transitions, 2425 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 19:13:27,300 INFO L231 Difference]: Finished difference. Result has 187 places, 218 transitions, 2009 flow [2024-06-03 19:13:27,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2009, PETRI_PLACES=187, PETRI_TRANSITIONS=218} [2024-06-03 19:13:27,301 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 142 predicate places. [2024-06-03 19:13:27,301 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 218 transitions, 2009 flow [2024-06-03 19:13:27,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:27,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:27,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:27,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 19:13:27,301 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:27,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:27,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1681939126, now seen corresponding path program 5 times [2024-06-03 19:13:27,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:27,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673005848] [2024-06-03 19:13:27,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:27,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:28,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:28,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673005848] [2024-06-03 19:13:28,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673005848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:28,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:28,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:13:28,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794106484] [2024-06-03 19:13:28,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:28,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:13:28,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:28,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:13:28,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:13:28,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:28,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 218 transitions, 2009 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:28,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:28,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:28,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:29,373 INFO L124 PetriNetUnfolderBase]: 2702/4286 cut-off events. [2024-06-03 19:13:29,373 INFO L125 PetriNetUnfolderBase]: For 436058/436060 co-relation queries the response was YES. [2024-06-03 19:13:29,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36467 conditions, 4286 events. 2702/4286 cut-off events. For 436058/436060 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 24043 event pairs, 492 based on Foata normal form. 16/4301 useless extension candidates. Maximal degree in co-relation 36376. Up to 3205 conditions per place. [2024-06-03 19:13:29,417 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 181 selfloop transitions, 79 changer transitions 0/265 dead transitions. [2024-06-03 19:13:29,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 265 transitions, 2928 flow [2024-06-03 19:13:29,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:13:29,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:13:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-03 19:13:29,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-03 19:13:29,418 INFO L175 Difference]: Start difference. First operand has 187 places, 218 transitions, 2009 flow. Second operand 9 states and 195 transitions. [2024-06-03 19:13:29,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 265 transitions, 2928 flow [2024-06-03 19:13:29,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 265 transitions, 2809 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 19:13:29,694 INFO L231 Difference]: Finished difference. Result has 190 places, 220 transitions, 2120 flow [2024-06-03 19:13:29,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1890, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2120, PETRI_PLACES=190, PETRI_TRANSITIONS=220} [2024-06-03 19:13:29,694 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 145 predicate places. [2024-06-03 19:13:29,695 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 220 transitions, 2120 flow [2024-06-03 19:13:29,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:29,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:29,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:29,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 19:13:29,695 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:29,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:29,696 INFO L85 PathProgramCache]: Analyzing trace with hash -428991926, now seen corresponding path program 6 times [2024-06-03 19:13:29,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:29,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516532579] [2024-06-03 19:13:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:29,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:30,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:30,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516532579] [2024-06-03 19:13:30,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516532579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:30,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:30,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:13:30,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787214787] [2024-06-03 19:13:30,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:30,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:13:30,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:30,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:13:30,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:13:30,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:30,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 220 transitions, 2120 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:30,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:30,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:30,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:31,846 INFO L124 PetriNetUnfolderBase]: 2871/4565 cut-off events. [2024-06-03 19:13:31,846 INFO L125 PetriNetUnfolderBase]: For 481970/481972 co-relation queries the response was YES. [2024-06-03 19:13:31,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39495 conditions, 4565 events. 2871/4565 cut-off events. For 481970/481972 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 26117 event pairs, 669 based on Foata normal form. 16/4580 useless extension candidates. Maximal degree in co-relation 39403. Up to 3696 conditions per place. [2024-06-03 19:13:31,894 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 188 selfloop transitions, 74 changer transitions 0/267 dead transitions. [2024-06-03 19:13:31,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 267 transitions, 3053 flow [2024-06-03 19:13:31,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:13:31,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:13:31,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-03 19:13:31,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-03 19:13:31,896 INFO L175 Difference]: Start difference. First operand has 190 places, 220 transitions, 2120 flow. Second operand 9 states and 195 transitions. [2024-06-03 19:13:31,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 267 transitions, 3053 flow [2024-06-03 19:13:32,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 267 transitions, 2939 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 19:13:32,191 INFO L231 Difference]: Finished difference. Result has 194 places, 222 transitions, 2230 flow [2024-06-03 19:13:32,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2006, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2230, PETRI_PLACES=194, PETRI_TRANSITIONS=222} [2024-06-03 19:13:32,192 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 149 predicate places. [2024-06-03 19:13:32,192 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 222 transitions, 2230 flow [2024-06-03 19:13:32,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:32,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:32,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:32,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 19:13:32,193 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:32,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:32,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1624346786, now seen corresponding path program 7 times [2024-06-03 19:13:32,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:32,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169382970] [2024-06-03 19:13:32,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:32,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:33,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:33,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169382970] [2024-06-03 19:13:33,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169382970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:33,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:33,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:13:33,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778102936] [2024-06-03 19:13:33,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:33,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:13:33,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:33,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:13:33,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:13:33,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:33,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 222 transitions, 2230 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:33,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:33,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:33,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:34,397 INFO L124 PetriNetUnfolderBase]: 2835/4509 cut-off events. [2024-06-03 19:13:34,397 INFO L125 PetriNetUnfolderBase]: For 475280/475282 co-relation queries the response was YES. [2024-06-03 19:13:34,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38598 conditions, 4509 events. 2835/4509 cut-off events. For 475280/475282 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 25770 event pairs, 671 based on Foata normal form. 20/4528 useless extension candidates. Maximal degree in co-relation 38504. Up to 3796 conditions per place. [2024-06-03 19:13:34,441 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 184 selfloop transitions, 72 changer transitions 0/261 dead transitions. [2024-06-03 19:13:34,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 261 transitions, 2867 flow [2024-06-03 19:13:34,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:13:34,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:13:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-03 19:13:34,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-03 19:13:34,442 INFO L175 Difference]: Start difference. First operand has 194 places, 222 transitions, 2230 flow. Second operand 9 states and 189 transitions. [2024-06-03 19:13:34,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 261 transitions, 2867 flow [2024-06-03 19:13:34,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 261 transitions, 2736 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 19:13:34,834 INFO L231 Difference]: Finished difference. Result has 198 places, 222 transitions, 2250 flow [2024-06-03 19:13:34,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2250, PETRI_PLACES=198, PETRI_TRANSITIONS=222} [2024-06-03 19:13:34,834 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 153 predicate places. [2024-06-03 19:13:34,834 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 222 transitions, 2250 flow [2024-06-03 19:13:34,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:34,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:34,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:34,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 19:13:34,835 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:34,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:34,835 INFO L85 PathProgramCache]: Analyzing trace with hash -371898746, now seen corresponding path program 8 times [2024-06-03 19:13:34,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:34,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532773110] [2024-06-03 19:13:34,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:34,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:35,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:35,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532773110] [2024-06-03 19:13:35,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532773110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:35,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:35,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:13:35,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937549592] [2024-06-03 19:13:35,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:35,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:13:35,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:35,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:13:35,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:13:36,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:36,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 222 transitions, 2250 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:36,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:36,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:36,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:37,320 INFO L124 PetriNetUnfolderBase]: 2910/4634 cut-off events. [2024-06-03 19:13:37,321 INFO L125 PetriNetUnfolderBase]: For 489445/489447 co-relation queries the response was YES. [2024-06-03 19:13:37,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39473 conditions, 4634 events. 2910/4634 cut-off events. For 489445/489447 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 26715 event pairs, 686 based on Foata normal form. 20/4653 useless extension candidates. Maximal degree in co-relation 39377. Up to 3921 conditions per place. [2024-06-03 19:13:37,361 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 188 selfloop transitions, 67 changer transitions 0/260 dead transitions. [2024-06-03 19:13:37,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 260 transitions, 2912 flow [2024-06-03 19:13:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:13:37,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:13:37,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-03 19:13:37,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-03 19:13:37,363 INFO L175 Difference]: Start difference. First operand has 198 places, 222 transitions, 2250 flow. Second operand 9 states and 187 transitions. [2024-06-03 19:13:37,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 260 transitions, 2912 flow [2024-06-03 19:13:37,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 260 transitions, 2763 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-03 19:13:37,734 INFO L231 Difference]: Finished difference. Result has 199 places, 223 transitions, 2280 flow [2024-06-03 19:13:37,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2101, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2280, PETRI_PLACES=199, PETRI_TRANSITIONS=223} [2024-06-03 19:13:37,734 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 154 predicate places. [2024-06-03 19:13:37,734 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 223 transitions, 2280 flow [2024-06-03 19:13:37,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:37,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:37,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:37,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 19:13:37,735 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:37,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:37,735 INFO L85 PathProgramCache]: Analyzing trace with hash -365642636, now seen corresponding path program 9 times [2024-06-03 19:13:37,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:37,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185878433] [2024-06-03 19:13:37,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:37,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:38,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:38,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185878433] [2024-06-03 19:13:38,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185878433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:38,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:38,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:13:38,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571266341] [2024-06-03 19:13:38,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:38,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:13:38,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:38,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:13:38,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:13:38,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:38,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 223 transitions, 2280 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:38,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:38,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:38,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:40,022 INFO L124 PetriNetUnfolderBase]: 2985/4769 cut-off events. [2024-06-03 19:13:40,023 INFO L125 PetriNetUnfolderBase]: For 508685/508687 co-relation queries the response was YES. [2024-06-03 19:13:40,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40448 conditions, 4769 events. 2985/4769 cut-off events. For 508685/508687 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 27838 event pairs, 710 based on Foata normal form. 20/4788 useless extension candidates. Maximal degree in co-relation 40351. Up to 4046 conditions per place. [2024-06-03 19:13:40,072 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 187 selfloop transitions, 68 changer transitions 0/260 dead transitions. [2024-06-03 19:13:40,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 260 transitions, 2940 flow [2024-06-03 19:13:40,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:13:40,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:13:40,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-03 19:13:40,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-03 19:13:40,074 INFO L175 Difference]: Start difference. First operand has 199 places, 223 transitions, 2280 flow. Second operand 9 states and 185 transitions. [2024-06-03 19:13:40,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 260 transitions, 2940 flow [2024-06-03 19:13:40,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 260 transitions, 2787 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 19:13:40,500 INFO L231 Difference]: Finished difference. Result has 201 places, 224 transitions, 2310 flow [2024-06-03 19:13:40,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2310, PETRI_PLACES=201, PETRI_TRANSITIONS=224} [2024-06-03 19:13:40,501 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 156 predicate places. [2024-06-03 19:13:40,501 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 224 transitions, 2310 flow [2024-06-03 19:13:40,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:40,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:40,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:40,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 19:13:40,502 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:40,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:40,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1511121376, now seen corresponding path program 10 times [2024-06-03 19:13:40,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:40,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955275164] [2024-06-03 19:13:40,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:40,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:41,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:41,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955275164] [2024-06-03 19:13:41,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955275164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:41,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:41,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:13:41,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285892548] [2024-06-03 19:13:41,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:41,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:13:41,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:41,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:13:41,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:13:41,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:41,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 224 transitions, 2310 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:41,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:41,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:41,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:42,756 INFO L124 PetriNetUnfolderBase]: 3043/4867 cut-off events. [2024-06-03 19:13:42,756 INFO L125 PetriNetUnfolderBase]: For 519465/519467 co-relation queries the response was YES. [2024-06-03 19:13:42,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41102 conditions, 4867 events. 3043/4867 cut-off events. For 519465/519467 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 28548 event pairs, 696 based on Foata normal form. 16/4882 useless extension candidates. Maximal degree in co-relation 41004. Up to 3914 conditions per place. [2024-06-03 19:13:42,805 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 190 selfloop transitions, 70 changer transitions 0/265 dead transitions. [2024-06-03 19:13:42,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 265 transitions, 2996 flow [2024-06-03 19:13:42,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:13:42,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:13:42,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-03 19:13:42,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-03 19:13:42,807 INFO L175 Difference]: Start difference. First operand has 201 places, 224 transitions, 2310 flow. Second operand 9 states and 189 transitions. [2024-06-03 19:13:42,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 265 transitions, 2996 flow [2024-06-03 19:13:43,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 265 transitions, 2839 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 19:13:43,223 INFO L231 Difference]: Finished difference. Result has 203 places, 225 transitions, 2341 flow [2024-06-03 19:13:43,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2341, PETRI_PLACES=203, PETRI_TRANSITIONS=225} [2024-06-03 19:13:43,224 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 158 predicate places. [2024-06-03 19:13:43,224 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 225 transitions, 2341 flow [2024-06-03 19:13:43,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:43,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:43,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:43,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 19:13:43,225 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:43,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:43,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1150106675, now seen corresponding path program 1 times [2024-06-03 19:13:43,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:43,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263685469] [2024-06-03 19:13:43,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:43,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:44,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:44,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263685469] [2024-06-03 19:13:44,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263685469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:44,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:44,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:13:44,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112900043] [2024-06-03 19:13:44,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:44,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:13:44,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:44,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:13:44,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:13:44,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:13:44,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 225 transitions, 2341 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:13:44,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:44,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:13:44,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:45,068 INFO L124 PetriNetUnfolderBase]: 2945/4790 cut-off events. [2024-06-03 19:13:45,068 INFO L125 PetriNetUnfolderBase]: For 513741/513745 co-relation queries the response was YES. [2024-06-03 19:13:45,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41061 conditions, 4790 events. 2945/4790 cut-off events. For 513741/513745 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 28783 event pairs, 817 based on Foata normal form. 6/4759 useless extension candidates. Maximal degree in co-relation 40962. Up to 4323 conditions per place. [2024-06-03 19:13:45,117 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 201 selfloop transitions, 33 changer transitions 0/257 dead transitions. [2024-06-03 19:13:45,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 257 transitions, 3055 flow [2024-06-03 19:13:45,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:13:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:13:45,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 19:13:45,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-03 19:13:45,118 INFO L175 Difference]: Start difference. First operand has 203 places, 225 transitions, 2341 flow. Second operand 8 states and 156 transitions. [2024-06-03 19:13:45,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 257 transitions, 3055 flow [2024-06-03 19:13:45,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 257 transitions, 2873 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 19:13:45,567 INFO L231 Difference]: Finished difference. Result has 206 places, 239 transitions, 2453 flow [2024-06-03 19:13:45,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2173, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2453, PETRI_PLACES=206, PETRI_TRANSITIONS=239} [2024-06-03 19:13:45,567 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 161 predicate places. [2024-06-03 19:13:45,567 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 239 transitions, 2453 flow [2024-06-03 19:13:45,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:13:45,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:45,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:45,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 19:13:45,568 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:45,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:45,568 INFO L85 PathProgramCache]: Analyzing trace with hash -934202645, now seen corresponding path program 2 times [2024-06-03 19:13:45,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:45,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816787833] [2024-06-03 19:13:45,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:45,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:46,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:46,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816787833] [2024-06-03 19:13:46,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816787833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:46,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:46,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:13:46,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002639743] [2024-06-03 19:13:46,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:46,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:13:46,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:46,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:13:46,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:13:46,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:13:46,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 239 transitions, 2453 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:13:46,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:46,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:13:46,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:47,412 INFO L124 PetriNetUnfolderBase]: 2955/4803 cut-off events. [2024-06-03 19:13:47,412 INFO L125 PetriNetUnfolderBase]: For 523893/523897 co-relation queries the response was YES. [2024-06-03 19:13:47,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40989 conditions, 4803 events. 2955/4803 cut-off events. For 523893/523897 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 28894 event pairs, 807 based on Foata normal form. 4/4770 useless extension candidates. Maximal degree in co-relation 40887. Up to 4293 conditions per place. [2024-06-03 19:13:47,462 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 190 selfloop transitions, 45 changer transitions 0/258 dead transitions. [2024-06-03 19:13:47,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 258 transitions, 3154 flow [2024-06-03 19:13:47,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:13:47,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:13:47,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-03 19:13:47,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-03 19:13:47,463 INFO L175 Difference]: Start difference. First operand has 206 places, 239 transitions, 2453 flow. Second operand 7 states and 141 transitions. [2024-06-03 19:13:47,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 258 transitions, 3154 flow [2024-06-03 19:13:47,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 258 transitions, 3069 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-03 19:13:47,857 INFO L231 Difference]: Finished difference. Result has 209 places, 243 transitions, 2532 flow [2024-06-03 19:13:47,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2368, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2532, PETRI_PLACES=209, PETRI_TRANSITIONS=243} [2024-06-03 19:13:47,857 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 164 predicate places. [2024-06-03 19:13:47,857 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 243 transitions, 2532 flow [2024-06-03 19:13:47,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:13:47,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:47,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:47,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 19:13:47,858 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:47,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:47,858 INFO L85 PathProgramCache]: Analyzing trace with hash -934192725, now seen corresponding path program 1 times [2024-06-03 19:13:47,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:47,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576858148] [2024-06-03 19:13:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:47,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:49,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:49,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576858148] [2024-06-03 19:13:49,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576858148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:49,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:49,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:13:49,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265889240] [2024-06-03 19:13:49,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:49,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:13:49,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:49,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:13:49,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:13:49,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:13:49,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 243 transitions, 2532 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:49,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:49,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:13:49,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:50,352 INFO L124 PetriNetUnfolderBase]: 2960/4812 cut-off events. [2024-06-03 19:13:50,352 INFO L125 PetriNetUnfolderBase]: For 537362/537368 co-relation queries the response was YES. [2024-06-03 19:13:50,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41317 conditions, 4812 events. 2960/4812 cut-off events. For 537362/537368 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 28957 event pairs, 784 based on Foata normal form. 7/4782 useless extension candidates. Maximal degree in co-relation 41214. Up to 4442 conditions per place. [2024-06-03 19:13:50,402 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 219 selfloop transitions, 20 changer transitions 0/262 dead transitions. [2024-06-03 19:13:50,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 262 transitions, 3115 flow [2024-06-03 19:13:50,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:13:50,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:13:50,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:13:50,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-03 19:13:50,403 INFO L175 Difference]: Start difference. First operand has 209 places, 243 transitions, 2532 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:13:50,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 262 transitions, 3115 flow [2024-06-03 19:13:50,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 262 transitions, 3014 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-03 19:13:50,760 INFO L231 Difference]: Finished difference. Result has 213 places, 246 transitions, 2543 flow [2024-06-03 19:13:50,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2431, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2543, PETRI_PLACES=213, PETRI_TRANSITIONS=246} [2024-06-03 19:13:50,760 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 168 predicate places. [2024-06-03 19:13:50,761 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 246 transitions, 2543 flow [2024-06-03 19:13:50,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:50,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:50,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:50,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 19:13:50,761 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:50,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:50,761 INFO L85 PathProgramCache]: Analyzing trace with hash -934193190, now seen corresponding path program 2 times [2024-06-03 19:13:50,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:50,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306791660] [2024-06-03 19:13:50,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:50,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:52,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:52,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306791660] [2024-06-03 19:13:52,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306791660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:52,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:52,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:13:52,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443453124] [2024-06-03 19:13:52,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:52,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:13:52,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:52,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:13:52,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:13:52,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:13:52,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 246 transitions, 2543 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:52,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:52,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:13:52,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:53,217 INFO L124 PetriNetUnfolderBase]: 3006/4875 cut-off events. [2024-06-03 19:13:53,217 INFO L125 PetriNetUnfolderBase]: For 557336/557340 co-relation queries the response was YES. [2024-06-03 19:13:53,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42429 conditions, 4875 events. 3006/4875 cut-off events. For 557336/557340 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 29273 event pairs, 799 based on Foata normal form. 4/4842 useless extension candidates. Maximal degree in co-relation 42325. Up to 4300 conditions per place. [2024-06-03 19:13:53,268 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 195 selfloop transitions, 54 changer transitions 0/272 dead transitions. [2024-06-03 19:13:53,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 272 transitions, 3543 flow [2024-06-03 19:13:53,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:13:53,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:13:53,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:13:53,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-03 19:13:53,269 INFO L175 Difference]: Start difference. First operand has 213 places, 246 transitions, 2543 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:13:53,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 272 transitions, 3543 flow [2024-06-03 19:13:53,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 272 transitions, 3453 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 19:13:53,732 INFO L231 Difference]: Finished difference. Result has 216 places, 254 transitions, 2753 flow [2024-06-03 19:13:53,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2453, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2753, PETRI_PLACES=216, PETRI_TRANSITIONS=254} [2024-06-03 19:13:53,733 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 171 predicate places. [2024-06-03 19:13:53,733 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 254 transitions, 2753 flow [2024-06-03 19:13:53,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:53,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:53,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:53,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 19:13:53,733 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:53,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:53,734 INFO L85 PathProgramCache]: Analyzing trace with hash -934206210, now seen corresponding path program 3 times [2024-06-03 19:13:53,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:53,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974808060] [2024-06-03 19:13:53,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:53,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:54,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:54,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974808060] [2024-06-03 19:13:54,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974808060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:54,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:54,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:13:54,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478984841] [2024-06-03 19:13:54,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:54,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:13:54,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:54,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:13:54,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:13:55,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:13:55,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 254 transitions, 2753 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:55,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:55,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:13:55,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:56,085 INFO L124 PetriNetUnfolderBase]: 3010/4881 cut-off events. [2024-06-03 19:13:56,085 INFO L125 PetriNetUnfolderBase]: For 574561/574565 co-relation queries the response was YES. [2024-06-03 19:13:56,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43413 conditions, 4881 events. 3010/4881 cut-off events. For 574561/574565 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 29299 event pairs, 807 based on Foata normal form. 4/4848 useless extension candidates. Maximal degree in co-relation 43307. Up to 4349 conditions per place. [2024-06-03 19:13:56,135 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 201 selfloop transitions, 50 changer transitions 0/274 dead transitions. [2024-06-03 19:13:56,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 274 transitions, 3524 flow [2024-06-03 19:13:56,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:13:56,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:13:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 19:13:56,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-03 19:13:56,136 INFO L175 Difference]: Start difference. First operand has 216 places, 254 transitions, 2753 flow. Second operand 8 states and 157 transitions. [2024-06-03 19:13:56,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 274 transitions, 3524 flow [2024-06-03 19:13:56,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 274 transitions, 3364 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-03 19:13:56,599 INFO L231 Difference]: Finished difference. Result has 220 places, 258 transitions, 2801 flow [2024-06-03 19:13:56,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2607, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2801, PETRI_PLACES=220, PETRI_TRANSITIONS=258} [2024-06-03 19:13:56,599 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 175 predicate places. [2024-06-03 19:13:56,599 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 258 transitions, 2801 flow [2024-06-03 19:13:56,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:56,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:56,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:56,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 19:13:56,600 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:56,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:56,600 INFO L85 PathProgramCache]: Analyzing trace with hash -887880728, now seen corresponding path program 11 times [2024-06-03 19:13:56,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:56,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202973342] [2024-06-03 19:13:56,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:56,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:57,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:57,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202973342] [2024-06-03 19:13:57,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202973342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:57,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:57,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:13:57,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029573427] [2024-06-03 19:13:57,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:57,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:13:57,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:57,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:13:57,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:13:57,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:57,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 258 transitions, 2801 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:57,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:57,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:57,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:59,110 INFO L124 PetriNetUnfolderBase]: 3240/5182 cut-off events. [2024-06-03 19:13:59,111 INFO L125 PetriNetUnfolderBase]: For 623440/623444 co-relation queries the response was YES. [2024-06-03 19:13:59,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45317 conditions, 5182 events. 3240/5182 cut-off events. For 623440/623444 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 30618 event pairs, 763 based on Foata normal form. 22/5202 useless extension candidates. Maximal degree in co-relation 45209. Up to 4386 conditions per place. [2024-06-03 19:13:59,167 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 214 selfloop transitions, 74 changer transitions 0/293 dead transitions. [2024-06-03 19:13:59,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 293 transitions, 3527 flow [2024-06-03 19:13:59,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:13:59,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:13:59,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-03 19:13:59,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-03 19:13:59,169 INFO L175 Difference]: Start difference. First operand has 220 places, 258 transitions, 2801 flow. Second operand 9 states and 179 transitions. [2024-06-03 19:13:59,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 293 transitions, 3527 flow [2024-06-03 19:13:59,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 293 transitions, 3370 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 19:13:59,720 INFO L231 Difference]: Finished difference. Result has 223 places, 259 transitions, 2843 flow [2024-06-03 19:13:59,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2644, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2843, PETRI_PLACES=223, PETRI_TRANSITIONS=259} [2024-06-03 19:13:59,721 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 178 predicate places. [2024-06-03 19:13:59,721 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 259 transitions, 2843 flow [2024-06-03 19:13:59,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:59,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:59,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:59,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 19:13:59,721 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:59,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:59,722 INFO L85 PathProgramCache]: Analyzing trace with hash -255718056, now seen corresponding path program 12 times [2024-06-03 19:13:59,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:59,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022238254] [2024-06-03 19:13:59,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:59,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:00,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:00,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022238254] [2024-06-03 19:14:00,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022238254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:00,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:00,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:00,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591988425] [2024-06-03 19:14:00,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:00,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:00,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:00,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:00,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:00,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:00,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 259 transitions, 2843 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:00,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:00,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:00,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:02,041 INFO L124 PetriNetUnfolderBase]: 3315/5307 cut-off events. [2024-06-03 19:14:02,042 INFO L125 PetriNetUnfolderBase]: For 645919/645923 co-relation queries the response was YES. [2024-06-03 19:14:02,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46524 conditions, 5307 events. 3315/5307 cut-off events. For 645919/645923 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 31598 event pairs, 768 based on Foata normal form. 22/5327 useless extension candidates. Maximal degree in co-relation 46415. Up to 4511 conditions per place. [2024-06-03 19:14:02,099 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 219 selfloop transitions, 71 changer transitions 0/295 dead transitions. [2024-06-03 19:14:02,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 295 transitions, 3579 flow [2024-06-03 19:14:02,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:02,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-03 19:14:02,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-03 19:14:02,100 INFO L175 Difference]: Start difference. First operand has 223 places, 259 transitions, 2843 flow. Second operand 9 states and 181 transitions. [2024-06-03 19:14:02,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 295 transitions, 3579 flow [2024-06-03 19:14:02,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 295 transitions, 3406 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 19:14:02,767 INFO L231 Difference]: Finished difference. Result has 225 places, 260 transitions, 2865 flow [2024-06-03 19:14:02,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2670, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2865, PETRI_PLACES=225, PETRI_TRANSITIONS=260} [2024-06-03 19:14:02,767 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-06-03 19:14:02,767 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 260 transitions, 2865 flow [2024-06-03 19:14:02,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:02,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:02,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:02,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 19:14:02,768 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:02,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:02,769 INFO L85 PathProgramCache]: Analyzing trace with hash -249461946, now seen corresponding path program 13 times [2024-06-03 19:14:02,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:02,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793446391] [2024-06-03 19:14:02,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:02,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:03,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:03,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793446391] [2024-06-03 19:14:03,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793446391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:03,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:03,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:03,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397024631] [2024-06-03 19:14:03,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:03,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:03,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:03,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:03,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:03,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:03,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 260 transitions, 2865 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:03,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:03,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:03,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:05,098 INFO L124 PetriNetUnfolderBase]: 3365/5403 cut-off events. [2024-06-03 19:14:05,098 INFO L125 PetriNetUnfolderBase]: For 657550/657554 co-relation queries the response was YES. [2024-06-03 19:14:05,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46821 conditions, 5403 events. 3365/5403 cut-off events. For 657550/657554 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 32414 event pairs, 790 based on Foata normal form. 22/5423 useless extension candidates. Maximal degree in co-relation 46711. Up to 4597 conditions per place. [2024-06-03 19:14:05,154 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 221 selfloop transitions, 70 changer transitions 0/296 dead transitions. [2024-06-03 19:14:05,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 296 transitions, 3605 flow [2024-06-03 19:14:05,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:05,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:05,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-03 19:14:05,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-03 19:14:05,156 INFO L175 Difference]: Start difference. First operand has 225 places, 260 transitions, 2865 flow. Second operand 9 states and 182 transitions. [2024-06-03 19:14:05,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 296 transitions, 3605 flow [2024-06-03 19:14:05,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 296 transitions, 3436 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 19:14:05,810 INFO L231 Difference]: Finished difference. Result has 227 places, 261 transitions, 2891 flow [2024-06-03 19:14:05,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2696, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2891, PETRI_PLACES=227, PETRI_TRANSITIONS=261} [2024-06-03 19:14:05,811 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-03 19:14:05,811 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 261 transitions, 2891 flow [2024-06-03 19:14:05,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:05,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:05,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:05,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 19:14:05,812 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:05,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:05,812 INFO L85 PathProgramCache]: Analyzing trace with hash -255895686, now seen corresponding path program 14 times [2024-06-03 19:14:05,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:05,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876682292] [2024-06-03 19:14:05,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:05,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:06,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:06,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876682292] [2024-06-03 19:14:06,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876682292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:06,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:06,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:06,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87033812] [2024-06-03 19:14:06,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:06,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:06,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:06,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:06,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:06,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:06,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 261 transitions, 2891 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:06,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:06,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:06,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:08,108 INFO L124 PetriNetUnfolderBase]: 3337/5359 cut-off events. [2024-06-03 19:14:08,108 INFO L125 PetriNetUnfolderBase]: For 634606/634610 co-relation queries the response was YES. [2024-06-03 19:14:08,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45577 conditions, 5359 events. 3337/5359 cut-off events. For 634606/634610 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 32097 event pairs, 750 based on Foata normal form. 18/5375 useless extension candidates. Maximal degree in co-relation 45466. Up to 4203 conditions per place. [2024-06-03 19:14:08,164 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 219 selfloop transitions, 75 changer transitions 0/299 dead transitions. [2024-06-03 19:14:08,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 299 transitions, 3601 flow [2024-06-03 19:14:08,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:08,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:08,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-03 19:14:08,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-03 19:14:08,166 INFO L175 Difference]: Start difference. First operand has 227 places, 261 transitions, 2891 flow. Second operand 9 states and 183 transitions. [2024-06-03 19:14:08,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 299 transitions, 3601 flow [2024-06-03 19:14:08,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 299 transitions, 3418 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-03 19:14:08,795 INFO L231 Difference]: Finished difference. Result has 229 places, 261 transitions, 2864 flow [2024-06-03 19:14:08,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2708, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2864, PETRI_PLACES=229, PETRI_TRANSITIONS=261} [2024-06-03 19:14:08,795 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-03 19:14:08,796 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 261 transitions, 2864 flow [2024-06-03 19:14:08,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:08,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:08,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:08,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 19:14:08,796 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:08,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:08,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2028735005, now seen corresponding path program 3 times [2024-06-03 19:14:08,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:08,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794536202] [2024-06-03 19:14:08,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:08,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:09,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:09,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794536202] [2024-06-03 19:14:09,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794536202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:09,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:09,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:14:09,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344342671] [2024-06-03 19:14:09,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:09,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:14:09,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:09,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:14:09,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:14:09,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:14:09,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 261 transitions, 2864 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:14:09,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:09,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:14:09,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:10,635 INFO L124 PetriNetUnfolderBase]: 3179/5164 cut-off events. [2024-06-03 19:14:10,635 INFO L125 PetriNetUnfolderBase]: For 617042/617044 co-relation queries the response was YES. [2024-06-03 19:14:10,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44684 conditions, 5164 events. 3179/5164 cut-off events. For 617042/617044 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31536 event pairs, 848 based on Foata normal form. 1/5114 useless extension candidates. Maximal degree in co-relation 44572. Up to 4689 conditions per place. [2024-06-03 19:14:10,693 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 222 selfloop transitions, 34 changer transitions 0/279 dead transitions. [2024-06-03 19:14:10,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 279 transitions, 3475 flow [2024-06-03 19:14:10,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:14:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:14:10,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-03 19:14:10,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-03 19:14:10,694 INFO L175 Difference]: Start difference. First operand has 229 places, 261 transitions, 2864 flow. Second operand 7 states and 139 transitions. [2024-06-03 19:14:10,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 279 transitions, 3475 flow [2024-06-03 19:14:11,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 279 transitions, 3214 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-03 19:14:11,335 INFO L231 Difference]: Finished difference. Result has 227 places, 264 transitions, 2744 flow [2024-06-03 19:14:11,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2603, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2744, PETRI_PLACES=227, PETRI_TRANSITIONS=264} [2024-06-03 19:14:11,335 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-03 19:14:11,336 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 264 transitions, 2744 flow [2024-06-03 19:14:11,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:14:11,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:11,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:11,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 19:14:11,336 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:11,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:11,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1134043609, now seen corresponding path program 4 times [2024-06-03 19:14:11,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:11,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505233106] [2024-06-03 19:14:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:11,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:12,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:12,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505233106] [2024-06-03 19:14:12,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505233106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:12,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:12,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:14:12,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637977528] [2024-06-03 19:14:12,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:12,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:14:12,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:12,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:14:12,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:14:12,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:14:12,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 264 transitions, 2744 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:14:12,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:12,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:14:12,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:13,243 INFO L124 PetriNetUnfolderBase]: 3184/5171 cut-off events. [2024-06-03 19:14:13,243 INFO L125 PetriNetUnfolderBase]: For 629050/629052 co-relation queries the response was YES. [2024-06-03 19:14:13,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44085 conditions, 5171 events. 3184/5171 cut-off events. For 629050/629052 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31571 event pairs, 848 based on Foata normal form. 1/5121 useless extension candidates. Maximal degree in co-relation 43973. Up to 4676 conditions per place. [2024-06-03 19:14:13,303 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 210 selfloop transitions, 47 changer transitions 0/280 dead transitions. [2024-06-03 19:14:13,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 280 transitions, 3488 flow [2024-06-03 19:14:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:14:13,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:14:13,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-03 19:14:13,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-03 19:14:13,304 INFO L175 Difference]: Start difference. First operand has 227 places, 264 transitions, 2744 flow. Second operand 7 states and 139 transitions. [2024-06-03 19:14:13,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 280 transitions, 3488 flow [2024-06-03 19:14:13,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 280 transitions, 3384 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 19:14:13,910 INFO L231 Difference]: Finished difference. Result has 229 places, 267 transitions, 2796 flow [2024-06-03 19:14:13,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2640, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2796, PETRI_PLACES=229, PETRI_TRANSITIONS=267} [2024-06-03 19:14:13,911 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-03 19:14:13,911 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 267 transitions, 2796 flow [2024-06-03 19:14:13,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:14:13,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:13,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:13,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 19:14:13,912 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:13,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:13,912 INFO L85 PathProgramCache]: Analyzing trace with hash 303212186, now seen corresponding path program 1 times [2024-06-03 19:14:13,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:13,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451834540] [2024-06-03 19:14:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:13,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:15,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:15,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451834540] [2024-06-03 19:14:15,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451834540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:15,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:15,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:14:15,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871632866] [2024-06-03 19:14:15,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:15,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:14:15,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:15,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:14:15,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:14:15,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:15,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 267 transitions, 2796 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:15,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:15,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:15,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:16,475 INFO L124 PetriNetUnfolderBase]: 3364/5373 cut-off events. [2024-06-03 19:14:16,475 INFO L125 PetriNetUnfolderBase]: For 652010/652012 co-relation queries the response was YES. [2024-06-03 19:14:16,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45431 conditions, 5373 events. 3364/5373 cut-off events. For 652010/652012 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 32057 event pairs, 801 based on Foata normal form. 4/5369 useless extension candidates. Maximal degree in co-relation 45318. Up to 4696 conditions per place. [2024-06-03 19:14:16,535 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 218 selfloop transitions, 83 changer transitions 0/306 dead transitions. [2024-06-03 19:14:16,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 306 transitions, 3570 flow [2024-06-03 19:14:16,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:14:16,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:14:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-03 19:14:16,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-03 19:14:16,536 INFO L175 Difference]: Start difference. First operand has 229 places, 267 transitions, 2796 flow. Second operand 10 states and 197 transitions. [2024-06-03 19:14:16,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 306 transitions, 3570 flow [2024-06-03 19:14:17,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 306 transitions, 3464 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-03 19:14:17,398 INFO L231 Difference]: Finished difference. Result has 236 places, 272 transitions, 2955 flow [2024-06-03 19:14:17,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2690, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2955, PETRI_PLACES=236, PETRI_TRANSITIONS=272} [2024-06-03 19:14:17,399 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 191 predicate places. [2024-06-03 19:14:17,399 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 272 transitions, 2955 flow [2024-06-03 19:14:17,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:17,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:17,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:17,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 19:14:17,400 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:17,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:17,400 INFO L85 PathProgramCache]: Analyzing trace with hash -80433672, now seen corresponding path program 2 times [2024-06-03 19:14:17,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:17,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482587273] [2024-06-03 19:14:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:17,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:18,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:18,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482587273] [2024-06-03 19:14:18,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482587273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:18,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:18,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:14:18,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196663041] [2024-06-03 19:14:18,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:18,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:14:18,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:18,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:14:18,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:14:18,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:18,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 272 transitions, 2955 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:18,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:18,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:18,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:20,410 INFO L124 PetriNetUnfolderBase]: 3392/5422 cut-off events. [2024-06-03 19:14:20,410 INFO L125 PetriNetUnfolderBase]: For 673040/673042 co-relation queries the response was YES. [2024-06-03 19:14:20,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46725 conditions, 5422 events. 3392/5422 cut-off events. For 673040/673042 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 32406 event pairs, 801 based on Foata normal form. 4/5418 useless extension candidates. Maximal degree in co-relation 46610. Up to 4730 conditions per place. [2024-06-03 19:14:20,473 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 214 selfloop transitions, 98 changer transitions 0/317 dead transitions. [2024-06-03 19:14:20,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 317 transitions, 3831 flow [2024-06-03 19:14:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:14:20,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:14:20,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-03 19:14:20,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-03 19:14:20,474 INFO L175 Difference]: Start difference. First operand has 236 places, 272 transitions, 2955 flow. Second operand 10 states and 197 transitions. [2024-06-03 19:14:20,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 317 transitions, 3831 flow [2024-06-03 19:14:21,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 317 transitions, 3590 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-03 19:14:21,226 INFO L231 Difference]: Finished difference. Result has 240 places, 285 transitions, 3108 flow [2024-06-03 19:14:21,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2734, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3108, PETRI_PLACES=240, PETRI_TRANSITIONS=285} [2024-06-03 19:14:21,227 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 195 predicate places. [2024-06-03 19:14:21,227 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 285 transitions, 3108 flow [2024-06-03 19:14:21,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:21,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:21,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:21,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 19:14:21,227 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:21,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:21,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2020366600, now seen corresponding path program 3 times [2024-06-03 19:14:21,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:21,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738816951] [2024-06-03 19:14:21,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:21,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:22,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:22,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738816951] [2024-06-03 19:14:22,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738816951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:22,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:22,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:14:22,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537832943] [2024-06-03 19:14:22,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:22,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:14:22,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:22,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:14:22,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:14:22,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:22,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 285 transitions, 3108 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:22,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:22,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:22,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:23,893 INFO L124 PetriNetUnfolderBase]: 3409/5451 cut-off events. [2024-06-03 19:14:23,893 INFO L125 PetriNetUnfolderBase]: For 692724/692726 co-relation queries the response was YES. [2024-06-03 19:14:23,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47623 conditions, 5451 events. 3409/5451 cut-off events. For 692724/692726 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 32657 event pairs, 801 based on Foata normal form. 4/5448 useless extension candidates. Maximal degree in co-relation 47506. Up to 4757 conditions per place. [2024-06-03 19:14:23,956 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 221 selfloop transitions, 95 changer transitions 0/321 dead transitions. [2024-06-03 19:14:23,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 321 transitions, 3916 flow [2024-06-03 19:14:23,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:14:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:14:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-03 19:14:23,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-03 19:14:23,958 INFO L175 Difference]: Start difference. First operand has 240 places, 285 transitions, 3108 flow. Second operand 10 states and 197 transitions. [2024-06-03 19:14:23,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 321 transitions, 3916 flow [2024-06-03 19:14:24,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 321 transitions, 3693 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-03 19:14:24,790 INFO L231 Difference]: Finished difference. Result has 246 places, 288 transitions, 3177 flow [2024-06-03 19:14:24,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2889, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3177, PETRI_PLACES=246, PETRI_TRANSITIONS=288} [2024-06-03 19:14:24,791 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-03 19:14:24,791 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 288 transitions, 3177 flow [2024-06-03 19:14:24,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:24,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:24,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:24,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 19:14:24,792 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:24,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:24,792 INFO L85 PathProgramCache]: Analyzing trace with hash -69958152, now seen corresponding path program 4 times [2024-06-03 19:14:24,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:24,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865143700] [2024-06-03 19:14:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:24,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:25,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:25,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865143700] [2024-06-03 19:14:25,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865143700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:25,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:25,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:14:25,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418804057] [2024-06-03 19:14:25,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:25,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:14:25,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:25,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:14:25,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:14:26,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:26,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 288 transitions, 3177 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:26,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:26,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:26,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:27,320 INFO L124 PetriNetUnfolderBase]: 3442/5517 cut-off events. [2024-06-03 19:14:27,320 INFO L125 PetriNetUnfolderBase]: For 701146/701148 co-relation queries the response was YES. [2024-06-03 19:14:27,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47236 conditions, 5517 events. 3442/5517 cut-off events. For 701146/701148 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33244 event pairs, 633 based on Foata normal form. 4/5513 useless extension candidates. Maximal degree in co-relation 47117. Up to 4605 conditions per place. [2024-06-03 19:14:27,384 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 216 selfloop transitions, 110 changer transitions 0/331 dead transitions. [2024-06-03 19:14:27,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 331 transitions, 4359 flow [2024-06-03 19:14:27,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:14:27,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:14:27,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-03 19:14:27,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-03 19:14:27,385 INFO L175 Difference]: Start difference. First operand has 246 places, 288 transitions, 3177 flow. Second operand 10 states and 203 transitions. [2024-06-03 19:14:27,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 331 transitions, 4359 flow [2024-06-03 19:14:28,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 331 transitions, 4104 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-03 19:14:28,152 INFO L231 Difference]: Finished difference. Result has 250 places, 293 transitions, 3334 flow [2024-06-03 19:14:28,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2922, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3334, PETRI_PLACES=250, PETRI_TRANSITIONS=293} [2024-06-03 19:14:28,152 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-03 19:14:28,152 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 293 transitions, 3334 flow [2024-06-03 19:14:28,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:28,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:28,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:28,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 19:14:28,153 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:28,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:28,153 INFO L85 PathProgramCache]: Analyzing trace with hash -365533542, now seen corresponding path program 5 times [2024-06-03 19:14:28,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:28,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676978663] [2024-06-03 19:14:28,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:28,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:29,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:29,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676978663] [2024-06-03 19:14:29,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676978663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:29,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:29,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:14:29,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857098530] [2024-06-03 19:14:29,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:29,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:14:29,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:29,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:14:29,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:14:29,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:29,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 293 transitions, 3334 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:29,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:29,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:29,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:30,894 INFO L124 PetriNetUnfolderBase]: 3434/5505 cut-off events. [2024-06-03 19:14:30,894 INFO L125 PetriNetUnfolderBase]: For 708908/708910 co-relation queries the response was YES. [2024-06-03 19:14:30,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47259 conditions, 5505 events. 3434/5505 cut-off events. For 708908/708910 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33157 event pairs, 808 based on Foata normal form. 4/5501 useless extension candidates. Maximal degree in co-relation 47138. Up to 4804 conditions per place. [2024-06-03 19:14:30,952 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 224 selfloop transitions, 97 changer transitions 0/326 dead transitions. [2024-06-03 19:14:30,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 326 transitions, 4071 flow [2024-06-03 19:14:30,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:14:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:14:30,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-03 19:14:30,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-03 19:14:30,953 INFO L175 Difference]: Start difference. First operand has 250 places, 293 transitions, 3334 flow. Second operand 10 states and 197 transitions. [2024-06-03 19:14:30,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 326 transitions, 4071 flow [2024-06-03 19:14:31,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 326 transitions, 3767 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-03 19:14:31,756 INFO L231 Difference]: Finished difference. Result has 254 places, 294 transitions, 3254 flow [2024-06-03 19:14:31,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3032, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3254, PETRI_PLACES=254, PETRI_TRANSITIONS=294} [2024-06-03 19:14:31,757 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 209 predicate places. [2024-06-03 19:14:31,757 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 294 transitions, 3254 flow [2024-06-03 19:14:31,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:31,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:31,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:31,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 19:14:31,757 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:31,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:31,758 INFO L85 PathProgramCache]: Analyzing trace with hash -462883475, now seen corresponding path program 5 times [2024-06-03 19:14:31,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:31,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752467910] [2024-06-03 19:14:31,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:31,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:32,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:32,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:32,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752467910] [2024-06-03 19:14:32,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752467910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:32,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:32,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:14:32,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432798804] [2024-06-03 19:14:32,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:32,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:14:32,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:32,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:14:32,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:14:32,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:14:32,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 294 transitions, 3254 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:14:32,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:32,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:14:32,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:33,753 INFO L124 PetriNetUnfolderBase]: 3276/5356 cut-off events. [2024-06-03 19:14:33,754 INFO L125 PetriNetUnfolderBase]: For 717941/717945 co-relation queries the response was YES. [2024-06-03 19:14:33,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46261 conditions, 5356 events. 3276/5356 cut-off events. For 717941/717945 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 33218 event pairs, 787 based on Foata normal form. 3/5309 useless extension candidates. Maximal degree in co-relation 46138. Up to 4760 conditions per place. [2024-06-03 19:14:33,816 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 219 selfloop transitions, 66 changer transitions 0/308 dead transitions. [2024-06-03 19:14:33,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 308 transitions, 4226 flow [2024-06-03 19:14:33,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:14:33,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:14:33,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-03 19:14:33,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-03 19:14:33,818 INFO L175 Difference]: Start difference. First operand has 254 places, 294 transitions, 3254 flow. Second operand 7 states and 138 transitions. [2024-06-03 19:14:33,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 308 transitions, 4226 flow [2024-06-03 19:14:34,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 308 transitions, 4005 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-03 19:14:34,508 INFO L231 Difference]: Finished difference. Result has 254 places, 297 transitions, 3227 flow [2024-06-03 19:14:34,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3033, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3227, PETRI_PLACES=254, PETRI_TRANSITIONS=297} [2024-06-03 19:14:34,508 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 209 predicate places. [2024-06-03 19:14:34,508 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 297 transitions, 3227 flow [2024-06-03 19:14:34,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:14:34,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:34,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:34,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 19:14:34,509 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:34,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:34,509 INFO L85 PathProgramCache]: Analyzing trace with hash -317190833, now seen corresponding path program 6 times [2024-06-03 19:14:34,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:34,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197130824] [2024-06-03 19:14:34,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:34,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:35,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:35,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197130824] [2024-06-03 19:14:35,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197130824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:35,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:35,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:14:35,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66732438] [2024-06-03 19:14:35,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:35,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:14:35,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:35,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:14:35,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:14:35,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:14:35,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 297 transitions, 3227 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:14:35,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:35,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:14:35,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:36,593 INFO L124 PetriNetUnfolderBase]: 3268/5342 cut-off events. [2024-06-03 19:14:36,593 INFO L125 PetriNetUnfolderBase]: For 731404/731408 co-relation queries the response was YES. [2024-06-03 19:14:36,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45922 conditions, 5342 events. 3268/5342 cut-off events. For 731404/731408 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 33082 event pairs, 776 based on Foata normal form. 4/5296 useless extension candidates. Maximal degree in co-relation 45798. Up to 4752 conditions per place. [2024-06-03 19:14:36,653 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 222 selfloop transitions, 62 changer transitions 0/307 dead transitions. [2024-06-03 19:14:36,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 307 transitions, 3981 flow [2024-06-03 19:14:36,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:14:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:14:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-03 19:14:36,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-03 19:14:36,654 INFO L175 Difference]: Start difference. First operand has 254 places, 297 transitions, 3227 flow. Second operand 7 states and 138 transitions. [2024-06-03 19:14:36,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 307 transitions, 3981 flow [2024-06-03 19:14:37,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 307 transitions, 3788 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-03 19:14:37,584 INFO L231 Difference]: Finished difference. Result has 257 places, 297 transitions, 3166 flow [2024-06-03 19:14:37,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3034, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3166, PETRI_PLACES=257, PETRI_TRANSITIONS=297} [2024-06-03 19:14:37,584 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 212 predicate places. [2024-06-03 19:14:37,584 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 297 transitions, 3166 flow [2024-06-03 19:14:37,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:14:37,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:37,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:37,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 19:14:37,585 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:37,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:37,585 INFO L85 PathProgramCache]: Analyzing trace with hash -317194398, now seen corresponding path program 4 times [2024-06-03 19:14:37,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:37,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508079235] [2024-06-03 19:14:37,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:37,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:38,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:38,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508079235] [2024-06-03 19:14:38,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508079235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:38,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:38,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:14:38,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395687347] [2024-06-03 19:14:38,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:38,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:14:38,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:38,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:14:38,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:14:38,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:14:38,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 297 transitions, 3166 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:38,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:38,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:14:38,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:39,863 INFO L124 PetriNetUnfolderBase]: 3278/5360 cut-off events. [2024-06-03 19:14:39,863 INFO L125 PetriNetUnfolderBase]: For 747716/747720 co-relation queries the response was YES. [2024-06-03 19:14:39,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46187 conditions, 5360 events. 3278/5360 cut-off events. For 747716/747720 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33285 event pairs, 777 based on Foata normal form. 4/5314 useless extension candidates. Maximal degree in co-relation 46062. Up to 4760 conditions per place. [2024-06-03 19:14:39,926 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 221 selfloop transitions, 68 changer transitions 0/312 dead transitions. [2024-06-03 19:14:39,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 312 transitions, 4026 flow [2024-06-03 19:14:39,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:14:39,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:14:39,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:14:39,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-03 19:14:39,928 INFO L175 Difference]: Start difference. First operand has 257 places, 297 transitions, 3166 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:14:39,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 312 transitions, 4026 flow [2024-06-03 19:14:40,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 312 transitions, 3875 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 19:14:40,784 INFO L231 Difference]: Finished difference. Result has 258 places, 301 transitions, 3258 flow [2024-06-03 19:14:40,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3015, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3258, PETRI_PLACES=258, PETRI_TRANSITIONS=301} [2024-06-03 19:14:40,785 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 213 predicate places. [2024-06-03 19:14:40,785 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 301 transitions, 3258 flow [2024-06-03 19:14:40,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:40,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:40,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:40,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 19:14:40,786 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:40,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:40,786 INFO L85 PathProgramCache]: Analyzing trace with hash -317181378, now seen corresponding path program 5 times [2024-06-03 19:14:40,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:40,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941356692] [2024-06-03 19:14:40,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:40,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:42,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:42,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941356692] [2024-06-03 19:14:42,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941356692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:42,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:42,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:14:42,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282348581] [2024-06-03 19:14:42,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:42,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:14:42,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:42,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:14:42,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:14:42,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:14:42,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 301 transitions, 3258 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:42,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:42,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:14:42,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:43,134 INFO L124 PetriNetUnfolderBase]: 3306/5404 cut-off events. [2024-06-03 19:14:43,134 INFO L125 PetriNetUnfolderBase]: For 772579/772583 co-relation queries the response was YES. [2024-06-03 19:14:43,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47458 conditions, 5404 events. 3306/5404 cut-off events. For 772579/772583 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 33569 event pairs, 777 based on Foata normal form. 4/5358 useless extension candidates. Maximal degree in co-relation 47332. Up to 4771 conditions per place. [2024-06-03 19:14:43,197 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 226 selfloop transitions, 72 changer transitions 0/321 dead transitions. [2024-06-03 19:14:43,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 321 transitions, 4410 flow [2024-06-03 19:14:43,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:14:43,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:14:43,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 19:14:43,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-03 19:14:43,198 INFO L175 Difference]: Start difference. First operand has 258 places, 301 transitions, 3258 flow. Second operand 8 states and 156 transitions. [2024-06-03 19:14:43,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 321 transitions, 4410 flow [2024-06-03 19:14:44,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 321 transitions, 4195 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-03 19:14:44,046 INFO L231 Difference]: Finished difference. Result has 261 places, 309 transitions, 3416 flow [2024-06-03 19:14:44,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3043, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3416, PETRI_PLACES=261, PETRI_TRANSITIONS=309} [2024-06-03 19:14:44,047 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 216 predicate places. [2024-06-03 19:14:44,047 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 309 transitions, 3416 flow [2024-06-03 19:14:44,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:44,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:44,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:44,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 19:14:44,047 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:44,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:44,048 INFO L85 PathProgramCache]: Analyzing trace with hash -463023285, now seen corresponding path program 2 times [2024-06-03 19:14:44,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:44,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927511875] [2024-06-03 19:14:44,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:44,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:45,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:45,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927511875] [2024-06-03 19:14:45,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927511875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:45,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:45,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:14:45,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017473164] [2024-06-03 19:14:45,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:45,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:14:45,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:45,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:14:45,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:14:45,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:14:45,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 309 transitions, 3416 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:45,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:45,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:14:45,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:46,333 INFO L124 PetriNetUnfolderBase]: 3316/5410 cut-off events. [2024-06-03 19:14:46,334 INFO L125 PetriNetUnfolderBase]: For 797085/797093 co-relation queries the response was YES. [2024-06-03 19:14:46,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48402 conditions, 5410 events. 3316/5410 cut-off events. For 797085/797093 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 33475 event pairs, 733 based on Foata normal form. 10/5371 useless extension candidates. Maximal degree in co-relation 48274. Up to 4989 conditions per place. [2024-06-03 19:14:46,395 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 277 selfloop transitions, 24 changer transitions 0/324 dead transitions. [2024-06-03 19:14:46,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 324 transitions, 4143 flow [2024-06-03 19:14:46,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:14:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:14:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 19:14:46,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-03 19:14:46,396 INFO L175 Difference]: Start difference. First operand has 261 places, 309 transitions, 3416 flow. Second operand 8 states and 146 transitions. [2024-06-03 19:14:46,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 324 transitions, 4143 flow [2024-06-03 19:14:47,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 324 transitions, 3951 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-03 19:14:47,156 INFO L231 Difference]: Finished difference. Result has 265 places, 312 transitions, 3374 flow [2024-06-03 19:14:47,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3224, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3374, PETRI_PLACES=265, PETRI_TRANSITIONS=312} [2024-06-03 19:14:47,156 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 220 predicate places. [2024-06-03 19:14:47,157 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 312 transitions, 3374 flow [2024-06-03 19:14:47,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:47,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:47,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:47,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 19:14:47,157 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:47,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:47,158 INFO L85 PathProgramCache]: Analyzing trace with hash -301943793, now seen corresponding path program 3 times [2024-06-03 19:14:47,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:47,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395478299] [2024-06-03 19:14:47,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:47,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:47,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:48,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:48,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395478299] [2024-06-03 19:14:48,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395478299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:48,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:48,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:14:48,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653864060] [2024-06-03 19:14:48,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:48,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:14:48,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:48,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:14:48,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:14:48,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:14:48,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 312 transitions, 3374 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:48,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:48,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:14:48,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:49,921 INFO L124 PetriNetUnfolderBase]: 3321/5423 cut-off events. [2024-06-03 19:14:49,921 INFO L125 PetriNetUnfolderBase]: For 809890/809892 co-relation queries the response was YES. [2024-06-03 19:14:49,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48848 conditions, 5423 events. 3321/5423 cut-off events. For 809890/809892 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 33575 event pairs, 745 based on Foata normal form. 1/5375 useless extension candidates. Maximal degree in co-relation 48718. Up to 5024 conditions per place. [2024-06-03 19:14:49,989 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 287 selfloop transitions, 18 changer transitions 0/328 dead transitions. [2024-06-03 19:14:49,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 328 transitions, 4114 flow [2024-06-03 19:14:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:14:49,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:14:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 19:14:49,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-03 19:14:49,990 INFO L175 Difference]: Start difference. First operand has 265 places, 312 transitions, 3374 flow. Second operand 8 states and 143 transitions. [2024-06-03 19:14:49,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 328 transitions, 4114 flow [2024-06-03 19:14:51,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 328 transitions, 3990 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-03 19:14:51,079 INFO L231 Difference]: Finished difference. Result has 268 places, 318 transitions, 3412 flow [2024-06-03 19:14:51,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3250, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3412, PETRI_PLACES=268, PETRI_TRANSITIONS=318} [2024-06-03 19:14:51,079 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 223 predicate places. [2024-06-03 19:14:51,079 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 318 transitions, 3412 flow [2024-06-03 19:14:51,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:51,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:51,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:51,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 19:14:51,080 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:51,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:51,080 INFO L85 PathProgramCache]: Analyzing trace with hash -991849203, now seen corresponding path program 4 times [2024-06-03 19:14:51,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:51,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264562916] [2024-06-03 19:14:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:51,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:52,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:52,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264562916] [2024-06-03 19:14:52,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264562916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:52,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:52,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:14:52,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961714441] [2024-06-03 19:14:52,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:52,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:14:52,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:52,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:14:52,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:14:52,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:14:52,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 318 transitions, 3412 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:52,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:52,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:14:52,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:53,835 INFO L124 PetriNetUnfolderBase]: 3318/5424 cut-off events. [2024-06-03 19:14:53,835 INFO L125 PetriNetUnfolderBase]: For 825527/825539 co-relation queries the response was YES. [2024-06-03 19:14:53,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49060 conditions, 5424 events. 3318/5424 cut-off events. For 825527/825539 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 33630 event pairs, 731 based on Foata normal form. 13/5388 useless extension candidates. Maximal degree in co-relation 48928. Up to 4974 conditions per place. [2024-06-03 19:14:53,898 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 271 selfloop transitions, 41 changer transitions 0/335 dead transitions. [2024-06-03 19:14:53,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 335 transitions, 4179 flow [2024-06-03 19:14:53,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:14:53,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:14:53,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 19:14:53,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-03 19:14:53,899 INFO L175 Difference]: Start difference. First operand has 268 places, 318 transitions, 3412 flow. Second operand 8 states and 148 transitions. [2024-06-03 19:14:53,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 335 transitions, 4179 flow [2024-06-03 19:14:54,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 335 transitions, 4064 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-03 19:14:54,914 INFO L231 Difference]: Finished difference. Result has 273 places, 324 transitions, 3525 flow [2024-06-03 19:14:54,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3525, PETRI_PLACES=273, PETRI_TRANSITIONS=324} [2024-06-03 19:14:54,915 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 228 predicate places. [2024-06-03 19:14:54,915 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 324 transitions, 3525 flow [2024-06-03 19:14:54,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:54,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:54,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:54,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 19:14:54,915 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:54,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:54,916 INFO L85 PathProgramCache]: Analyzing trace with hash -302449248, now seen corresponding path program 6 times [2024-06-03 19:14:54,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:54,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525033379] [2024-06-03 19:14:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:54,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:56,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:56,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525033379] [2024-06-03 19:14:56,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525033379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:56,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:56,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:14:56,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898979384] [2024-06-03 19:14:56,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:56,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:14:56,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:56,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:14:56,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:14:56,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:14:56,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 324 transitions, 3525 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:56,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:56,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:14:56,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:57,409 INFO L124 PetriNetUnfolderBase]: 3322/5428 cut-off events. [2024-06-03 19:14:57,409 INFO L125 PetriNetUnfolderBase]: For 843582/843586 co-relation queries the response was YES. [2024-06-03 19:14:57,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49571 conditions, 5428 events. 3322/5428 cut-off events. For 843582/843586 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33716 event pairs, 772 based on Foata normal form. 4/5382 useless extension candidates. Maximal degree in co-relation 49436. Up to 4707 conditions per place. [2024-06-03 19:14:57,473 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 231 selfloop transitions, 98 changer transitions 0/352 dead transitions. [2024-06-03 19:14:57,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 352 transitions, 4999 flow [2024-06-03 19:14:57,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:14:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:14:57,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:14:57,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-03 19:14:57,475 INFO L175 Difference]: Start difference. First operand has 273 places, 324 transitions, 3525 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:14:57,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 352 transitions, 4999 flow [2024-06-03 19:14:58,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 352 transitions, 4880 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-03 19:14:58,370 INFO L231 Difference]: Finished difference. Result has 279 places, 339 transitions, 3954 flow [2024-06-03 19:14:58,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3406, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3954, PETRI_PLACES=279, PETRI_TRANSITIONS=339} [2024-06-03 19:14:58,371 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 234 predicate places. [2024-06-03 19:14:58,371 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 339 transitions, 3954 flow [2024-06-03 19:14:58,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:58,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:58,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:58,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 19:14:58,371 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:58,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:58,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1704900593, now seen corresponding path program 7 times [2024-06-03 19:14:58,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:58,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183265376] [2024-06-03 19:14:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:58,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:59,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:59,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183265376] [2024-06-03 19:14:59,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183265376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:59,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:59,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:14:59,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318157842] [2024-06-03 19:14:59,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:59,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:14:59,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:59,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:14:59,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:14:59,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:14:59,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 339 transitions, 3954 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:14:59,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:59,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:14:59,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:00,380 INFO L124 PetriNetUnfolderBase]: 3378/5498 cut-off events. [2024-06-03 19:15:00,381 INFO L125 PetriNetUnfolderBase]: For 860742/860746 co-relation queries the response was YES. [2024-06-03 19:15:00,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51235 conditions, 5498 events. 3378/5498 cut-off events. For 860742/860746 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 33911 event pairs, 732 based on Foata normal form. 6/5455 useless extension candidates. Maximal degree in co-relation 51096. Up to 4949 conditions per place. [2024-06-03 19:15:00,450 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 307 selfloop transitions, 53 changer transitions 0/383 dead transitions. [2024-06-03 19:15:00,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 383 transitions, 5062 flow [2024-06-03 19:15:00,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:00,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:00,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-03 19:15:00,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-03 19:15:00,451 INFO L175 Difference]: Start difference. First operand has 279 places, 339 transitions, 3954 flow. Second operand 8 states and 163 transitions. [2024-06-03 19:15:00,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 383 transitions, 5062 flow [2024-06-03 19:15:01,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 383 transitions, 4784 flow, removed 96 selfloop flow, removed 3 redundant places. [2024-06-03 19:15:01,362 INFO L231 Difference]: Finished difference. Result has 287 places, 359 transitions, 4166 flow [2024-06-03 19:15:01,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3696, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4166, PETRI_PLACES=287, PETRI_TRANSITIONS=359} [2024-06-03 19:15:01,363 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 242 predicate places. [2024-06-03 19:15:01,363 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 359 transitions, 4166 flow [2024-06-03 19:15:01,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:15:01,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:01,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:01,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 19:15:01,363 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:01,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:01,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1775934465, now seen corresponding path program 1 times [2024-06-03 19:15:01,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:01,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69773528] [2024-06-03 19:15:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:01,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:02,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:02,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69773528] [2024-06-03 19:15:02,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69773528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:02,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:02,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:15:02,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957855482] [2024-06-03 19:15:02,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:02,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:15:02,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:02,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:15:02,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:15:02,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:15:02,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 359 transitions, 4166 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:02,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:02,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:15:02,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:03,571 INFO L124 PetriNetUnfolderBase]: 3448/5618 cut-off events. [2024-06-03 19:15:03,571 INFO L125 PetriNetUnfolderBase]: For 876608/876610 co-relation queries the response was YES. [2024-06-03 19:15:03,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51371 conditions, 5618 events. 3448/5618 cut-off events. For 876608/876610 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 34618 event pairs, 762 based on Foata normal form. 2/5619 useless extension candidates. Maximal degree in co-relation 51227. Up to 5176 conditions per place. [2024-06-03 19:15:03,642 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 344 selfloop transitions, 18 changer transitions 0/382 dead transitions. [2024-06-03 19:15:03,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 382 transitions, 5010 flow [2024-06-03 19:15:03,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:03,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:03,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:15:03,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-03 19:15:03,644 INFO L175 Difference]: Start difference. First operand has 287 places, 359 transitions, 4166 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:15:03,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 382 transitions, 5010 flow [2024-06-03 19:15:04,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 382 transitions, 4834 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 19:15:04,937 INFO L231 Difference]: Finished difference. Result has 287 places, 362 transitions, 4098 flow [2024-06-03 19:15:04,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3990, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4098, PETRI_PLACES=287, PETRI_TRANSITIONS=362} [2024-06-03 19:15:04,938 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 242 predicate places. [2024-06-03 19:15:04,938 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 362 transitions, 4098 flow [2024-06-03 19:15:04,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:04,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:04,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:04,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 19:15:04,939 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:04,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:04,939 INFO L85 PathProgramCache]: Analyzing trace with hash 262065062, now seen corresponding path program 1 times [2024-06-03 19:15:04,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:04,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588720018] [2024-06-03 19:15:04,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:04,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:05,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:05,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588720018] [2024-06-03 19:15:05,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588720018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:05,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:05,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:15:05,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194922042] [2024-06-03 19:15:05,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:05,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:15:05,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:05,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:15:05,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:15:06,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:15:06,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 362 transitions, 4098 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:06,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:06,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:15:06,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:07,257 INFO L124 PetriNetUnfolderBase]: 3458/5634 cut-off events. [2024-06-03 19:15:07,257 INFO L125 PetriNetUnfolderBase]: For 898644/898646 co-relation queries the response was YES. [2024-06-03 19:15:07,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51892 conditions, 5634 events. 3458/5634 cut-off events. For 898644/898646 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 34724 event pairs, 761 based on Foata normal form. 3/5636 useless extension candidates. Maximal degree in co-relation 51748. Up to 5196 conditions per place. [2024-06-03 19:15:07,329 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 344 selfloop transitions, 18 changer transitions 0/382 dead transitions. [2024-06-03 19:15:07,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 382 transitions, 4934 flow [2024-06-03 19:15:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:07,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:07,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:15:07,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-03 19:15:07,330 INFO L175 Difference]: Start difference. First operand has 287 places, 362 transitions, 4098 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:15:07,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 382 transitions, 4934 flow [2024-06-03 19:15:08,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 382 transitions, 4848 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 19:15:08,624 INFO L231 Difference]: Finished difference. Result has 289 places, 365 transitions, 4120 flow [2024-06-03 19:15:08,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4012, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4120, PETRI_PLACES=289, PETRI_TRANSITIONS=365} [2024-06-03 19:15:08,625 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 244 predicate places. [2024-06-03 19:15:08,625 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 365 transitions, 4120 flow [2024-06-03 19:15:08,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:08,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:08,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:08,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 19:15:08,626 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:08,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:08,626 INFO L85 PathProgramCache]: Analyzing trace with hash 262064845, now seen corresponding path program 2 times [2024-06-03 19:15:08,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:08,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825857350] [2024-06-03 19:15:08,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:08,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:09,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:09,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825857350] [2024-06-03 19:15:09,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825857350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:09,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:09,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:15:09,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388511651] [2024-06-03 19:15:09,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:09,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:15:09,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:09,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:15:09,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:15:09,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:15:09,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 365 transitions, 4120 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:09,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:09,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:15:09,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:10,857 INFO L124 PetriNetUnfolderBase]: 3468/5650 cut-off events. [2024-06-03 19:15:10,857 INFO L125 PetriNetUnfolderBase]: For 913107/913109 co-relation queries the response was YES. [2024-06-03 19:15:10,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52420 conditions, 5650 events. 3468/5650 cut-off events. For 913107/913109 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 34842 event pairs, 761 based on Foata normal form. 2/5651 useless extension candidates. Maximal degree in co-relation 52275. Up to 5195 conditions per place. [2024-06-03 19:15:10,941 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 343 selfloop transitions, 23 changer transitions 0/386 dead transitions. [2024-06-03 19:15:10,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 386 transitions, 4974 flow [2024-06-03 19:15:10,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:10,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:15:10,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-03 19:15:10,943 INFO L175 Difference]: Start difference. First operand has 289 places, 365 transitions, 4120 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:15:10,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 386 transitions, 4974 flow [2024-06-03 19:15:12,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 386 transitions, 4888 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 19:15:12,198 INFO L231 Difference]: Finished difference. Result has 291 places, 368 transitions, 4160 flow [2024-06-03 19:15:12,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4034, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4160, PETRI_PLACES=291, PETRI_TRANSITIONS=368} [2024-06-03 19:15:12,199 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 246 predicate places. [2024-06-03 19:15:12,199 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 368 transitions, 4160 flow [2024-06-03 19:15:12,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:12,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:12,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:12,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 19:15:12,199 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:12,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:12,200 INFO L85 PathProgramCache]: Analyzing trace with hash 2004499238, now seen corresponding path program 2 times [2024-06-03 19:15:12,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:12,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323170211] [2024-06-03 19:15:12,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:12,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:13,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:13,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323170211] [2024-06-03 19:15:13,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323170211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:13,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:13,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:15:13,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181730865] [2024-06-03 19:15:13,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:13,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:15:13,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:13,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:15:13,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:15:13,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:15:13,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 368 transitions, 4160 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:13,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:13,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:15:13,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:14,752 INFO L124 PetriNetUnfolderBase]: 3489/5681 cut-off events. [2024-06-03 19:15:14,752 INFO L125 PetriNetUnfolderBase]: For 941115/941117 co-relation queries the response was YES. [2024-06-03 19:15:14,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53441 conditions, 5681 events. 3489/5681 cut-off events. For 941115/941117 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 35029 event pairs, 760 based on Foata normal form. 2/5682 useless extension candidates. Maximal degree in co-relation 53295. Up to 5220 conditions per place. [2024-06-03 19:15:14,826 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 341 selfloop transitions, 31 changer transitions 0/392 dead transitions. [2024-06-03 19:15:14,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 392 transitions, 5266 flow [2024-06-03 19:15:14,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:14,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:14,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:15:14,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-03 19:15:14,827 INFO L175 Difference]: Start difference. First operand has 291 places, 368 transitions, 4160 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:15:14,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 392 transitions, 5266 flow [2024-06-03 19:15:16,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 392 transitions, 5162 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 19:15:16,203 INFO L231 Difference]: Finished difference. Result has 294 places, 378 transitions, 4291 flow [2024-06-03 19:15:16,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4056, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4291, PETRI_PLACES=294, PETRI_TRANSITIONS=378} [2024-06-03 19:15:16,204 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 249 predicate places. [2024-06-03 19:15:16,204 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 378 transitions, 4291 flow [2024-06-03 19:15:16,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:16,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:16,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:16,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 19:15:16,205 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:16,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:16,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1146996432, now seen corresponding path program 3 times [2024-06-03 19:15:16,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:16,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556054301] [2024-06-03 19:15:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:16,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:17,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:17,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556054301] [2024-06-03 19:15:17,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556054301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:17,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:17,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:15:17,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876022745] [2024-06-03 19:15:17,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:17,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:15:17,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:17,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:15:17,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:15:17,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:15:17,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 378 transitions, 4291 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:17,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:17,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:15:17,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:18,613 INFO L124 PetriNetUnfolderBase]: 3488/5680 cut-off events. [2024-06-03 19:15:18,613 INFO L125 PetriNetUnfolderBase]: For 957181/957183 co-relation queries the response was YES. [2024-06-03 19:15:18,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53673 conditions, 5680 events. 3488/5680 cut-off events. For 957181/957183 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 35006 event pairs, 759 based on Foata normal form. 3/5682 useless extension candidates. Maximal degree in co-relation 53525. Up to 5230 conditions per place. [2024-06-03 19:15:18,690 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 350 selfloop transitions, 25 changer transitions 0/395 dead transitions. [2024-06-03 19:15:18,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 395 transitions, 5158 flow [2024-06-03 19:15:18,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:18,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:18,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:15:18,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-03 19:15:18,692 INFO L175 Difference]: Start difference. First operand has 294 places, 378 transitions, 4291 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:15:18,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 395 transitions, 5158 flow [2024-06-03 19:15:20,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 395 transitions, 5018 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-03 19:15:20,157 INFO L231 Difference]: Finished difference. Result has 297 places, 381 transitions, 4291 flow [2024-06-03 19:15:20,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4157, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4291, PETRI_PLACES=297, PETRI_TRANSITIONS=381} [2024-06-03 19:15:20,157 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 252 predicate places. [2024-06-03 19:15:20,157 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 381 transitions, 4291 flow [2024-06-03 19:15:20,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:20,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:20,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:20,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 19:15:20,158 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:20,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:20,159 INFO L85 PathProgramCache]: Analyzing trace with hash 267629035, now seen corresponding path program 3 times [2024-06-03 19:15:20,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:20,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960959217] [2024-06-03 19:15:20,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:20,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:21,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:21,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960959217] [2024-06-03 19:15:21,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960959217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:21,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:21,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:15:21,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15498593] [2024-06-03 19:15:21,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:21,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:15:21,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:21,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:15:21,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:15:21,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:15:21,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 381 transitions, 4291 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:21,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:21,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:15:21,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:22,614 INFO L124 PetriNetUnfolderBase]: 3498/5696 cut-off events. [2024-06-03 19:15:22,614 INFO L125 PetriNetUnfolderBase]: For 970572/970574 co-relation queries the response was YES. [2024-06-03 19:15:22,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54155 conditions, 5696 events. 3498/5696 cut-off events. For 970572/970574 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 35127 event pairs, 759 based on Foata normal form. 2/5697 useless extension candidates. Maximal degree in co-relation 54006. Up to 5223 conditions per place. [2024-06-03 19:15:22,680 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 349 selfloop transitions, 30 changer transitions 0/399 dead transitions. [2024-06-03 19:15:22,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 399 transitions, 5169 flow [2024-06-03 19:15:22,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:22,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:22,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:15:22,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-03 19:15:22,681 INFO L175 Difference]: Start difference. First operand has 297 places, 381 transitions, 4291 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:15:22,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 399 transitions, 5169 flow [2024-06-03 19:15:24,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 399 transitions, 5059 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 19:15:24,241 INFO L231 Difference]: Finished difference. Result has 299 places, 384 transitions, 4329 flow [2024-06-03 19:15:24,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4181, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4329, PETRI_PLACES=299, PETRI_TRANSITIONS=384} [2024-06-03 19:15:24,242 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 254 predicate places. [2024-06-03 19:15:24,242 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 384 transitions, 4329 flow [2024-06-03 19:15:24,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:24,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:24,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:24,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 19:15:24,242 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:24,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:24,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1000861740, now seen corresponding path program 4 times [2024-06-03 19:15:24,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:24,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625973235] [2024-06-03 19:15:24,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:24,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:25,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:25,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625973235] [2024-06-03 19:15:25,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625973235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:25,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:25,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:15:25,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328756909] [2024-06-03 19:15:25,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:25,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:15:25,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:25,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:15:25,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:15:25,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:15:25,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 384 transitions, 4329 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:25,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:25,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:15:25,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:26,907 INFO L124 PetriNetUnfolderBase]: 3532/5747 cut-off events. [2024-06-03 19:15:26,907 INFO L125 PetriNetUnfolderBase]: For 1010031/1010035 co-relation queries the response was YES. [2024-06-03 19:15:26,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55574 conditions, 5747 events. 3532/5747 cut-off events. For 1010031/1010035 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 35473 event pairs, 769 based on Foata normal form. 5/5751 useless extension candidates. Maximal degree in co-relation 55424. Up to 5258 conditions per place. [2024-06-03 19:15:26,984 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 346 selfloop transitions, 37 changer transitions 0/403 dead transitions. [2024-06-03 19:15:26,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 403 transitions, 5485 flow [2024-06-03 19:15:26,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:26,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:15:26,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-03 19:15:26,985 INFO L175 Difference]: Start difference. First operand has 299 places, 384 transitions, 4329 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:15:26,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 403 transitions, 5485 flow [2024-06-03 19:15:28,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 403 transitions, 5359 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-03 19:15:28,659 INFO L231 Difference]: Finished difference. Result has 301 places, 390 transitions, 4446 flow [2024-06-03 19:15:28,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4203, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4446, PETRI_PLACES=301, PETRI_TRANSITIONS=390} [2024-06-03 19:15:28,659 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 256 predicate places. [2024-06-03 19:15:28,659 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 390 transitions, 4446 flow [2024-06-03 19:15:28,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:28,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:28,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:28,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 19:15:28,660 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:28,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:28,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1000869180, now seen corresponding path program 5 times [2024-06-03 19:15:28,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:28,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443346124] [2024-06-03 19:15:28,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:28,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:29,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:29,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443346124] [2024-06-03 19:15:29,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443346124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:29,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:29,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:15:29,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415768413] [2024-06-03 19:15:29,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:29,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:15:29,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:29,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:15:29,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:15:30,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:15:30,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 390 transitions, 4446 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:30,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:30,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:15:30,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:31,250 INFO L124 PetriNetUnfolderBase]: 3526/5739 cut-off events. [2024-06-03 19:15:31,250 INFO L125 PetriNetUnfolderBase]: For 1017396/1017400 co-relation queries the response was YES. [2024-06-03 19:15:31,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55683 conditions, 5739 events. 3526/5739 cut-off events. For 1017396/1017400 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 35399 event pairs, 769 based on Foata normal form. 4/5742 useless extension candidates. Maximal degree in co-relation 55532. Up to 5275 conditions per place. [2024-06-03 19:15:31,326 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 353 selfloop transitions, 30 changer transitions 0/403 dead transitions. [2024-06-03 19:15:31,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 403 transitions, 5312 flow [2024-06-03 19:15:31,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:31,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:31,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:15:31,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-03 19:15:31,328 INFO L175 Difference]: Start difference. First operand has 301 places, 390 transitions, 4446 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:15:31,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 403 transitions, 5312 flow [2024-06-03 19:15:32,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 403 transitions, 5205 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-03 19:15:32,891 INFO L231 Difference]: Finished difference. Result has 305 places, 393 transitions, 4485 flow [2024-06-03 19:15:32,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4343, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4485, PETRI_PLACES=305, PETRI_TRANSITIONS=393} [2024-06-03 19:15:32,891 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 260 predicate places. [2024-06-03 19:15:32,891 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 393 transitions, 4485 flow [2024-06-03 19:15:32,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:32,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:32,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:32,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 19:15:32,891 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:32,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:32,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1000869397, now seen corresponding path program 4 times [2024-06-03 19:15:32,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:32,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405171456] [2024-06-03 19:15:32,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:32,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:33,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:33,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405171456] [2024-06-03 19:15:33,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405171456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:33,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:33,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:15:33,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462748411] [2024-06-03 19:15:33,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:33,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:15:33,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:33,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:15:33,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:15:33,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:15:33,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 393 transitions, 4485 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:33,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:33,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:15:33,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:35,221 INFO L124 PetriNetUnfolderBase]: 3528/5744 cut-off events. [2024-06-03 19:15:35,221 INFO L125 PetriNetUnfolderBase]: For 1029302/1029306 co-relation queries the response was YES. [2024-06-03 19:15:35,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55839 conditions, 5744 events. 3528/5744 cut-off events. For 1029302/1029306 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 35508 event pairs, 773 based on Foata normal form. 2/5745 useless extension candidates. Maximal degree in co-relation 55686. Up to 5248 conditions per place. [2024-06-03 19:15:35,302 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 349 selfloop transitions, 39 changer transitions 0/408 dead transitions. [2024-06-03 19:15:35,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 408 transitions, 5379 flow [2024-06-03 19:15:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:35,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:35,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:15:35,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-03 19:15:35,303 INFO L175 Difference]: Start difference. First operand has 305 places, 393 transitions, 4485 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:15:35,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 408 transitions, 5379 flow [2024-06-03 19:15:37,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 408 transitions, 5263 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-03 19:15:37,023 INFO L231 Difference]: Finished difference. Result has 307 places, 396 transitions, 4543 flow [2024-06-03 19:15:37,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4369, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4543, PETRI_PLACES=307, PETRI_TRANSITIONS=396} [2024-06-03 19:15:37,023 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 262 predicate places. [2024-06-03 19:15:37,023 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 396 transitions, 4543 flow [2024-06-03 19:15:37,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:37,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:37,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:37,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 19:15:37,024 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:37,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:37,024 INFO L85 PathProgramCache]: Analyzing trace with hash -302264550, now seen corresponding path program 6 times [2024-06-03 19:15:37,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:37,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966189976] [2024-06-03 19:15:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:37,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:38,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:38,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966189976] [2024-06-03 19:15:38,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966189976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:38,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:38,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:15:38,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57744253] [2024-06-03 19:15:38,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:38,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:15:38,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:38,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:15:38,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:15:38,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:15:38,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 396 transitions, 4543 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:38,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:38,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:15:38,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:39,759 INFO L124 PetriNetUnfolderBase]: 3527/5743 cut-off events. [2024-06-03 19:15:39,759 INFO L125 PetriNetUnfolderBase]: For 1045353/1045357 co-relation queries the response was YES. [2024-06-03 19:15:39,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56248 conditions, 5743 events. 3527/5743 cut-off events. For 1045353/1045357 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 35507 event pairs, 769 based on Foata normal form. 5/5747 useless extension candidates. Maximal degree in co-relation 56094. Up to 5201 conditions per place. [2024-06-03 19:15:39,840 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 326 selfloop transitions, 70 changer transitions 0/416 dead transitions. [2024-06-03 19:15:39,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 416 transitions, 5761 flow [2024-06-03 19:15:39,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:39,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:15:39,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-03 19:15:39,841 INFO L175 Difference]: Start difference. First operand has 307 places, 396 transitions, 4543 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:15:39,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 416 transitions, 5761 flow [2024-06-03 19:15:41,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 416 transitions, 5609 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-03 19:15:41,554 INFO L231 Difference]: Finished difference. Result has 309 places, 402 transitions, 4716 flow [2024-06-03 19:15:41,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4391, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4716, PETRI_PLACES=309, PETRI_TRANSITIONS=402} [2024-06-03 19:15:41,554 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 264 predicate places. [2024-06-03 19:15:41,554 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 402 transitions, 4716 flow [2024-06-03 19:15:41,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:41,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:41,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:41,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 19:15:41,555 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:41,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:41,556 INFO L85 PathProgramCache]: Analyzing trace with hash -991326357, now seen corresponding path program 1 times [2024-06-03 19:15:41,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:41,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147686783] [2024-06-03 19:15:41,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:41,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:43,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:43,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147686783] [2024-06-03 19:15:43,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147686783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:43,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:43,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:15:43,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586057732] [2024-06-03 19:15:43,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:43,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:15:43,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:43,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:15:43,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:15:43,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:15:43,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 402 transitions, 4716 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:43,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:43,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:15:43,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:44,552 INFO L124 PetriNetUnfolderBase]: 3483/5655 cut-off events. [2024-06-03 19:15:44,552 INFO L125 PetriNetUnfolderBase]: For 1054893/1054895 co-relation queries the response was YES. [2024-06-03 19:15:44,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56162 conditions, 5655 events. 3483/5655 cut-off events. For 1054893/1054895 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 34900 event pairs, 753 based on Foata normal form. 2/5608 useless extension candidates. Maximal degree in co-relation 56007. Up to 5207 conditions per place. [2024-06-03 19:15:44,630 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 363 selfloop transitions, 19 changer transitions 0/415 dead transitions. [2024-06-03 19:15:44,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 415 transitions, 5606 flow [2024-06-03 19:15:44,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:44,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:15:44,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-03 19:15:44,631 INFO L175 Difference]: Start difference. First operand has 309 places, 402 transitions, 4716 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:15:44,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 415 transitions, 5606 flow [2024-06-03 19:15:46,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 415 transitions, 5481 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-03 19:15:46,512 INFO L231 Difference]: Finished difference. Result has 313 places, 404 transitions, 4736 flow [2024-06-03 19:15:46,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4593, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4736, PETRI_PLACES=313, PETRI_TRANSITIONS=404} [2024-06-03 19:15:46,513 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 268 predicate places. [2024-06-03 19:15:46,513 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 404 transitions, 4736 flow [2024-06-03 19:15:46,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:46,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:46,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:46,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 19:15:46,514 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:46,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:46,514 INFO L85 PathProgramCache]: Analyzing trace with hash 749805109, now seen corresponding path program 1 times [2024-06-03 19:15:46,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:46,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965180086] [2024-06-03 19:15:46,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:46,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:47,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:47,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965180086] [2024-06-03 19:15:47,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965180086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:47,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:47,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:15:47,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143364822] [2024-06-03 19:15:47,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:47,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:15:47,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:47,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:15:47,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:15:47,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:15:47,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 404 transitions, 4736 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:47,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:47,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:15:47,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:48,805 INFO L124 PetriNetUnfolderBase]: 3504/5684 cut-off events. [2024-06-03 19:15:48,806 INFO L125 PetriNetUnfolderBase]: For 1080713/1080723 co-relation queries the response was YES. [2024-06-03 19:15:48,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56463 conditions, 5684 events. 3504/5684 cut-off events. For 1080713/1080723 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 35034 event pairs, 585 based on Foata normal form. 14/5662 useless extension candidates. Maximal degree in co-relation 56306. Up to 5011 conditions per place. [2024-06-03 19:15:48,884 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 350 selfloop transitions, 51 changer transitions 0/434 dead transitions. [2024-06-03 19:15:48,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 434 transitions, 5735 flow [2024-06-03 19:15:48,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:48,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:48,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-03 19:15:48,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-03 19:15:48,885 INFO L175 Difference]: Start difference. First operand has 313 places, 404 transitions, 4736 flow. Second operand 8 states and 164 transitions. [2024-06-03 19:15:48,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 434 transitions, 5735 flow [2024-06-03 19:15:50,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 434 transitions, 5590 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-03 19:15:50,228 INFO L231 Difference]: Finished difference. Result has 314 places, 407 transitions, 4815 flow [2024-06-03 19:15:50,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4591, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4815, PETRI_PLACES=314, PETRI_TRANSITIONS=407} [2024-06-03 19:15:50,229 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 269 predicate places. [2024-06-03 19:15:50,229 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 407 transitions, 4815 flow [2024-06-03 19:15:50,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:50,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:50,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:50,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 19:15:50,229 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:50,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:50,230 INFO L85 PathProgramCache]: Analyzing trace with hash 760280629, now seen corresponding path program 2 times [2024-06-03 19:15:50,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:50,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805246103] [2024-06-03 19:15:50,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:50,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:51,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:51,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805246103] [2024-06-03 19:15:51,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805246103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:51,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:51,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:15:51,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109063627] [2024-06-03 19:15:51,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:51,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:15:51,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:51,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:15:51,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:15:51,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:15:51,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 407 transitions, 4815 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:51,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:51,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:15:51,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:52,615 INFO L124 PetriNetUnfolderBase]: 3520/5718 cut-off events. [2024-06-03 19:15:52,615 INFO L125 PetriNetUnfolderBase]: For 1101962/1101972 co-relation queries the response was YES. [2024-06-03 19:15:52,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57250 conditions, 5718 events. 3520/5718 cut-off events. For 1101962/1101972 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 35441 event pairs, 737 based on Foata normal form. 14/5683 useless extension candidates. Maximal degree in co-relation 57093. Up to 5090 conditions per place. [2024-06-03 19:15:52,697 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 348 selfloop transitions, 52 changer transitions 0/433 dead transitions. [2024-06-03 19:15:52,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 433 transitions, 5806 flow [2024-06-03 19:15:52,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:52,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:52,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-03 19:15:52,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-03 19:15:52,699 INFO L175 Difference]: Start difference. First operand has 314 places, 407 transitions, 4815 flow. Second operand 8 states and 161 transitions. [2024-06-03 19:15:52,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 433 transitions, 5806 flow [2024-06-03 19:15:54,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 433 transitions, 5604 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-03 19:15:54,604 INFO L231 Difference]: Finished difference. Result has 316 places, 410 transitions, 4845 flow [2024-06-03 19:15:54,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4613, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4845, PETRI_PLACES=316, PETRI_TRANSITIONS=410} [2024-06-03 19:15:54,604 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 271 predicate places. [2024-06-03 19:15:54,604 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 410 transitions, 4845 flow [2024-06-03 19:15:54,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:54,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:54,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:54,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 19:15:54,605 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:54,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:54,605 INFO L85 PathProgramCache]: Analyzing trace with hash 760293525, now seen corresponding path program 1 times [2024-06-03 19:15:54,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:54,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202337902] [2024-06-03 19:15:54,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:54,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:56,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:56,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:56,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202337902] [2024-06-03 19:15:56,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202337902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:56,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:56,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:15:56,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813482332] [2024-06-03 19:15:56,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:56,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:15:56,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:56,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:15:56,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:15:56,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:15:56,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 410 transitions, 4845 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:56,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:56,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:15:56,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:57,509 INFO L124 PetriNetUnfolderBase]: 3530/5732 cut-off events. [2024-06-03 19:15:57,510 INFO L125 PetriNetUnfolderBase]: For 1113966/1113976 co-relation queries the response was YES. [2024-06-03 19:15:57,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57565 conditions, 5732 events. 3530/5732 cut-off events. For 1113966/1113976 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 35483 event pairs, 736 based on Foata normal form. 12/5695 useless extension candidates. Maximal degree in co-relation 57407. Up to 5104 conditions per place. [2024-06-03 19:15:57,589 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 347 selfloop transitions, 57 changer transitions 0/437 dead transitions. [2024-06-03 19:15:57,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 437 transitions, 5844 flow [2024-06-03 19:15:57,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:15:57,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:15:57,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-03 19:15:57,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-03 19:15:57,590 INFO L175 Difference]: Start difference. First operand has 316 places, 410 transitions, 4845 flow. Second operand 9 states and 177 transitions. [2024-06-03 19:15:57,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 437 transitions, 5844 flow [2024-06-03 19:15:59,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 437 transitions, 5634 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-03 19:15:59,591 INFO L231 Difference]: Finished difference. Result has 319 places, 414 transitions, 4880 flow [2024-06-03 19:15:59,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4635, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4880, PETRI_PLACES=319, PETRI_TRANSITIONS=414} [2024-06-03 19:15:59,591 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 274 predicate places. [2024-06-03 19:15:59,591 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 414 transitions, 4880 flow [2024-06-03 19:15:59,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:59,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:59,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:59,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 19:15:59,592 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:59,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:59,592 INFO L85 PathProgramCache]: Analyzing trace with hash 868134961, now seen corresponding path program 1 times [2024-06-03 19:15:59,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:59,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563997060] [2024-06-03 19:15:59,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:59,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:00,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:00,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563997060] [2024-06-03 19:16:00,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563997060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:00,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:00,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:16:00,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861680543] [2024-06-03 19:16:00,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:00,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:16:00,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:00,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:16:00,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:16:00,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:16:00,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 414 transitions, 4880 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:00,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:00,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:16:00,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:01,867 INFO L124 PetriNetUnfolderBase]: 3692/5935 cut-off events. [2024-06-03 19:16:01,867 INFO L125 PetriNetUnfolderBase]: For 1132366/1132370 co-relation queries the response was YES. [2024-06-03 19:16:01,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59027 conditions, 5935 events. 3692/5935 cut-off events. For 1132366/1132370 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 36199 event pairs, 774 based on Foata normal form. 4/5938 useless extension candidates. Maximal degree in co-relation 58868. Up to 5386 conditions per place. [2024-06-03 19:16:01,952 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 371 selfloop transitions, 64 changer transitions 0/440 dead transitions. [2024-06-03 19:16:01,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 440 transitions, 5940 flow [2024-06-03 19:16:01,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:16:01,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:16:01,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 19:16:01,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-03 19:16:01,954 INFO L175 Difference]: Start difference. First operand has 319 places, 414 transitions, 4880 flow. Second operand 8 states and 156 transitions. [2024-06-03 19:16:01,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 440 transitions, 5940 flow [2024-06-03 19:16:04,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 440 transitions, 5723 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-03 19:16:04,075 INFO L231 Difference]: Finished difference. Result has 320 places, 418 transitions, 4928 flow [2024-06-03 19:16:04,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4663, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4928, PETRI_PLACES=320, PETRI_TRANSITIONS=418} [2024-06-03 19:16:04,075 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 275 predicate places. [2024-06-03 19:16:04,075 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 418 transitions, 4928 flow [2024-06-03 19:16:04,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:04,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:04,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:04,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 19:16:04,076 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:04,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:04,076 INFO L85 PathProgramCache]: Analyzing trace with hash -37340189, now seen corresponding path program 1 times [2024-06-03 19:16:04,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:04,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324521388] [2024-06-03 19:16:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:04,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:05,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:05,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324521388] [2024-06-03 19:16:05,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324521388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:05,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:05,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:16:05,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102971459] [2024-06-03 19:16:05,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:05,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:16:05,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:05,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:16:05,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:16:05,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:16:05,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 418 transitions, 4928 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:05,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:05,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:16:05,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:06,522 INFO L124 PetriNetUnfolderBase]: 3550/5756 cut-off events. [2024-06-03 19:16:06,522 INFO L125 PetriNetUnfolderBase]: For 1153426/1153430 co-relation queries the response was YES. [2024-06-03 19:16:06,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58871 conditions, 5756 events. 3550/5756 cut-off events. For 1153426/1153430 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35611 event pairs, 733 based on Foata normal form. 4/5711 useless extension candidates. Maximal degree in co-relation 58711. Up to 5118 conditions per place. [2024-06-03 19:16:06,606 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 345 selfloop transitions, 62 changer transitions 0/441 dead transitions. [2024-06-03 19:16:06,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 441 transitions, 5884 flow [2024-06-03 19:16:06,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:16:06,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:16:06,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:16:06,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-03 19:16:06,607 INFO L175 Difference]: Start difference. First operand has 320 places, 418 transitions, 4928 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:16:06,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 441 transitions, 5884 flow [2024-06-03 19:16:08,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 441 transitions, 5647 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-03 19:16:08,705 INFO L231 Difference]: Finished difference. Result has 322 places, 422 transitions, 4916 flow [2024-06-03 19:16:08,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4691, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4916, PETRI_PLACES=322, PETRI_TRANSITIONS=422} [2024-06-03 19:16:08,706 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 277 predicate places. [2024-06-03 19:16:08,706 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 422 transitions, 4916 flow [2024-06-03 19:16:08,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:08,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:08,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:08,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 19:16:08,706 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:08,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:08,707 INFO L85 PathProgramCache]: Analyzing trace with hash 868314451, now seen corresponding path program 2 times [2024-06-03 19:16:08,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:08,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149723833] [2024-06-03 19:16:08,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:08,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:09,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:09,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149723833] [2024-06-03 19:16:09,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149723833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:09,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:09,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:16:09,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310307033] [2024-06-03 19:16:09,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:09,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:16:09,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:09,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:16:09,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:16:09,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:16:09,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 422 transitions, 4916 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:09,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:09,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:16:09,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:11,105 INFO L124 PetriNetUnfolderBase]: 3712/5963 cut-off events. [2024-06-03 19:16:11,105 INFO L125 PetriNetUnfolderBase]: For 1178752/1178756 co-relation queries the response was YES. [2024-06-03 19:16:11,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60035 conditions, 5963 events. 3712/5963 cut-off events. For 1178752/1178756 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 36402 event pairs, 772 based on Foata normal form. 4/5966 useless extension candidates. Maximal degree in co-relation 59874. Up to 5378 conditions per place. [2024-06-03 19:16:11,190 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 364 selfloop transitions, 76 changer transitions 0/445 dead transitions. [2024-06-03 19:16:11,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 445 transitions, 5984 flow [2024-06-03 19:16:11,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:16:11,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:16:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 19:16:11,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-03 19:16:11,191 INFO L175 Difference]: Start difference. First operand has 322 places, 422 transitions, 4916 flow. Second operand 8 states and 155 transitions. [2024-06-03 19:16:11,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 445 transitions, 5984 flow [2024-06-03 19:16:13,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 445 transitions, 5813 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 19:16:13,088 INFO L231 Difference]: Finished difference. Result has 324 places, 426 transitions, 5044 flow [2024-06-03 19:16:13,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4745, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5044, PETRI_PLACES=324, PETRI_TRANSITIONS=426} [2024-06-03 19:16:13,088 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 279 predicate places. [2024-06-03 19:16:13,088 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 426 transitions, 5044 flow [2024-06-03 19:16:13,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:13,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:13,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:13,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 19:16:13,089 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:13,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:13,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1104786729, now seen corresponding path program 2 times [2024-06-03 19:16:13,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:13,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337804717] [2024-06-03 19:16:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:13,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:14,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:14,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337804717] [2024-06-03 19:16:14,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337804717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:14,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:14,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:16:14,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008602500] [2024-06-03 19:16:14,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:14,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:16:14,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:14,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:16:14,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:16:14,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:16:14,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 426 transitions, 5044 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:14,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:14,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:16:14,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:15,680 INFO L124 PetriNetUnfolderBase]: 3570/5789 cut-off events. [2024-06-03 19:16:15,681 INFO L125 PetriNetUnfolderBase]: For 1202539/1202543 co-relation queries the response was YES. [2024-06-03 19:16:15,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59948 conditions, 5789 events. 3570/5789 cut-off events. For 1202539/1202543 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35863 event pairs, 748 based on Foata normal form. 4/5744 useless extension candidates. Maximal degree in co-relation 59786. Up to 5048 conditions per place. [2024-06-03 19:16:15,766 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 329 selfloop transitions, 82 changer transitions 0/446 dead transitions. [2024-06-03 19:16:15,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 446 transitions, 6214 flow [2024-06-03 19:16:15,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:16:15,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:16:15,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:16:15,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-03 19:16:15,768 INFO L175 Difference]: Start difference. First operand has 324 places, 426 transitions, 5044 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:16:15,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 446 transitions, 6214 flow [2024-06-03 19:16:17,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 446 transitions, 5947 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-03 19:16:17,806 INFO L231 Difference]: Finished difference. Result has 326 places, 430 transitions, 5045 flow [2024-06-03 19:16:17,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4777, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5045, PETRI_PLACES=326, PETRI_TRANSITIONS=430} [2024-06-03 19:16:17,806 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 281 predicate places. [2024-06-03 19:16:17,807 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 430 transitions, 5045 flow [2024-06-03 19:16:17,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:17,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:17,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:17,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 19:16:17,807 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:17,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:17,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1104490059, now seen corresponding path program 3 times [2024-06-03 19:16:17,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:17,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660276847] [2024-06-03 19:16:17,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:17,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:18,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:18,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660276847] [2024-06-03 19:16:18,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660276847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:18,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:18,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:16:18,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307521034] [2024-06-03 19:16:18,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:18,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:16:18,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:18,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:16:18,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:16:19,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:16:19,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 430 transitions, 5045 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:19,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:19,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:16:19,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:20,400 INFO L124 PetriNetUnfolderBase]: 3572/5782 cut-off events. [2024-06-03 19:16:20,400 INFO L125 PetriNetUnfolderBase]: For 1217146/1217150 co-relation queries the response was YES. [2024-06-03 19:16:20,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59954 conditions, 5782 events. 3572/5782 cut-off events. For 1217146/1217150 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 35715 event pairs, 748 based on Foata normal form. 4/5737 useless extension candidates. Maximal degree in co-relation 59791. Up to 5105 conditions per place. [2024-06-03 19:16:20,490 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 347 selfloop transitions, 66 changer transitions 0/448 dead transitions. [2024-06-03 19:16:20,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 448 transitions, 5995 flow [2024-06-03 19:16:20,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:16:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:16:20,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 19:16:20,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-03 19:16:20,491 INFO L175 Difference]: Start difference. First operand has 326 places, 430 transitions, 5045 flow. Second operand 8 states and 156 transitions. [2024-06-03 19:16:20,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 448 transitions, 5995 flow [2024-06-03 19:16:23,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 448 transitions, 5804 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-03 19:16:23,096 INFO L231 Difference]: Finished difference. Result has 329 places, 433 transitions, 5081 flow [2024-06-03 19:16:23,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4856, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5081, PETRI_PLACES=329, PETRI_TRANSITIONS=433} [2024-06-03 19:16:23,096 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-03 19:16:23,096 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 433 transitions, 5081 flow [2024-06-03 19:16:23,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:23,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:23,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:23,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 19:16:23,096 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:23,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:23,097 INFO L85 PathProgramCache]: Analyzing trace with hash -29066227, now seen corresponding path program 3 times [2024-06-03 19:16:23,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:23,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770355106] [2024-06-03 19:16:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:23,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:24,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:24,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770355106] [2024-06-03 19:16:24,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770355106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:24,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:24,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:16:24,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110289923] [2024-06-03 19:16:24,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:24,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:16:24,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:24,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:16:24,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:16:24,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:16:24,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 433 transitions, 5081 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:24,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:24,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:16:24,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:25,479 INFO L124 PetriNetUnfolderBase]: 3750/6013 cut-off events. [2024-06-03 19:16:25,479 INFO L125 PetriNetUnfolderBase]: For 1252111/1252115 co-relation queries the response was YES. [2024-06-03 19:16:25,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61758 conditions, 6013 events. 3750/6013 cut-off events. For 1252111/1252115 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 36622 event pairs, 788 based on Foata normal form. 4/6016 useless extension candidates. Maximal degree in co-relation 61594. Up to 5348 conditions per place. [2024-06-03 19:16:25,569 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 374 selfloop transitions, 78 changer transitions 0/457 dead transitions. [2024-06-03 19:16:25,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 457 transitions, 6521 flow [2024-06-03 19:16:25,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:16:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:16:25,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:16:25,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-03 19:16:25,570 INFO L175 Difference]: Start difference. First operand has 329 places, 433 transitions, 5081 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:16:25,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 457 transitions, 6521 flow [2024-06-03 19:16:27,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 457 transitions, 6330 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 19:16:27,577 INFO L231 Difference]: Finished difference. Result has 331 places, 440 transitions, 5287 flow [2024-06-03 19:16:27,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4890, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5287, PETRI_PLACES=331, PETRI_TRANSITIONS=440} [2024-06-03 19:16:27,577 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 286 predicate places. [2024-06-03 19:16:27,577 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 440 transitions, 5287 flow [2024-06-03 19:16:27,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:27,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:27,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:27,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 19:16:27,577 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:27,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:27,578 INFO L85 PathProgramCache]: Analyzing trace with hash 651512858, now seen corresponding path program 1 times [2024-06-03 19:16:27,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:27,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87252952] [2024-06-03 19:16:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:27,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:28,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:28,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87252952] [2024-06-03 19:16:28,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87252952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:28,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:28,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:16:28,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890090394] [2024-06-03 19:16:28,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:28,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:16:28,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:28,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:16:28,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:16:28,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:16:28,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 440 transitions, 5287 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:28,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:28,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:16:28,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:30,602 INFO L124 PetriNetUnfolderBase]: 3914/6327 cut-off events. [2024-06-03 19:16:30,602 INFO L125 PetriNetUnfolderBase]: For 1316382/1316386 co-relation queries the response was YES. [2024-06-03 19:16:30,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63873 conditions, 6327 events. 3914/6327 cut-off events. For 1316382/1316386 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 39473 event pairs, 755 based on Foata normal form. 12/6338 useless extension candidates. Maximal degree in co-relation 63708. Up to 5019 conditions per place. [2024-06-03 19:16:30,700 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 378 selfloop transitions, 108 changer transitions 0/491 dead transitions. [2024-06-03 19:16:30,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 491 transitions, 6575 flow [2024-06-03 19:16:30,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:16:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:16:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-03 19:16:30,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-03 19:16:30,702 INFO L175 Difference]: Start difference. First operand has 331 places, 440 transitions, 5287 flow. Second operand 10 states and 202 transitions. [2024-06-03 19:16:30,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 491 transitions, 6575 flow [2024-06-03 19:16:32,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 491 transitions, 6373 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-03 19:16:32,707 INFO L231 Difference]: Finished difference. Result has 339 places, 451 transitions, 5492 flow [2024-06-03 19:16:32,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5085, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5492, PETRI_PLACES=339, PETRI_TRANSITIONS=451} [2024-06-03 19:16:32,708 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 294 predicate places. [2024-06-03 19:16:32,708 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 451 transitions, 5492 flow [2024-06-03 19:16:32,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:32,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:32,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:32,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 19:16:32,708 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:32,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:32,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1104366679, now seen corresponding path program 3 times [2024-06-03 19:16:32,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:32,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586445241] [2024-06-03 19:16:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:32,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:33,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:33,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586445241] [2024-06-03 19:16:33,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586445241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:33,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:33,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:16:33,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203331210] [2024-06-03 19:16:33,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:33,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:16:33,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:33,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:16:33,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:16:33,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:16:33,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 451 transitions, 5492 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:33,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:33,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:16:33,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:35,337 INFO L124 PetriNetUnfolderBase]: 3778/6158 cut-off events. [2024-06-03 19:16:35,337 INFO L125 PetriNetUnfolderBase]: For 1320682/1320686 co-relation queries the response was YES. [2024-06-03 19:16:35,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64299 conditions, 6158 events. 3778/6158 cut-off events. For 1320682/1320686 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 38908 event pairs, 779 based on Foata normal form. 6/6115 useless extension candidates. Maximal degree in co-relation 64130. Up to 5433 conditions per place. [2024-06-03 19:16:35,437 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 365 selfloop transitions, 68 changer transitions 0/470 dead transitions. [2024-06-03 19:16:35,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 470 transitions, 6534 flow [2024-06-03 19:16:35,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:16:35,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:16:35,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 19:16:35,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-03 19:16:35,439 INFO L175 Difference]: Start difference. First operand has 339 places, 451 transitions, 5492 flow. Second operand 8 states and 156 transitions. [2024-06-03 19:16:35,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 470 transitions, 6534 flow [2024-06-03 19:16:37,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 470 transitions, 6316 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-03 19:16:37,935 INFO L231 Difference]: Finished difference. Result has 339 places, 454 transitions, 5554 flow [2024-06-03 19:16:37,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5274, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5554, PETRI_PLACES=339, PETRI_TRANSITIONS=454} [2024-06-03 19:16:37,936 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 294 predicate places. [2024-06-03 19:16:37,936 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 454 transitions, 5554 flow [2024-06-03 19:16:37,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:37,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:37,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:37,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 19:16:37,936 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:37,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:37,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1104379575, now seen corresponding path program 2 times [2024-06-03 19:16:37,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:37,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987742015] [2024-06-03 19:16:37,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:37,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:39,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:39,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987742015] [2024-06-03 19:16:39,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987742015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:39,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:39,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:16:39,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138493611] [2024-06-03 19:16:39,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:39,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:16:39,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:39,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:16:39,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:16:39,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:16:39,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 454 transitions, 5554 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:39,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:39,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:16:39,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:40,868 INFO L124 PetriNetUnfolderBase]: 3798/6186 cut-off events. [2024-06-03 19:16:40,868 INFO L125 PetriNetUnfolderBase]: For 1343440/1343444 co-relation queries the response was YES. [2024-06-03 19:16:40,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64673 conditions, 6186 events. 3798/6186 cut-off events. For 1343440/1343444 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 39083 event pairs, 779 based on Foata normal form. 6/6143 useless extension candidates. Maximal degree in co-relation 64506. Up to 5455 conditions per place. [2024-06-03 19:16:40,971 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 365 selfloop transitions, 73 changer transitions 0/475 dead transitions. [2024-06-03 19:16:40,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 475 transitions, 6626 flow [2024-06-03 19:16:40,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:16:40,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:16:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 19:16:40,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-03 19:16:40,973 INFO L175 Difference]: Start difference. First operand has 339 places, 454 transitions, 5554 flow. Second operand 9 states and 173 transitions. [2024-06-03 19:16:40,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 475 transitions, 6626 flow [2024-06-03 19:16:43,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 475 transitions, 6368 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-03 19:16:43,483 INFO L231 Difference]: Finished difference. Result has 342 places, 458 transitions, 5597 flow [2024-06-03 19:16:43,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5296, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5597, PETRI_PLACES=342, PETRI_TRANSITIONS=458} [2024-06-03 19:16:43,484 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 297 predicate places. [2024-06-03 19:16:43,484 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 458 transitions, 5597 flow [2024-06-03 19:16:43,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:43,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:43,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:43,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 19:16:43,484 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:43,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:43,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1104783195, now seen corresponding path program 3 times [2024-06-03 19:16:43,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:43,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089087618] [2024-06-03 19:16:43,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:43,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:43,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:44,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:44,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089087618] [2024-06-03 19:16:44,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089087618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:44,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:44,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:16:44,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869410377] [2024-06-03 19:16:44,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:44,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:16:44,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:44,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:16:44,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:16:44,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:16:44,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 458 transitions, 5597 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:44,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:44,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:16:44,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:46,565 INFO L124 PetriNetUnfolderBase]: 3902/6338 cut-off events. [2024-06-03 19:16:46,565 INFO L125 PetriNetUnfolderBase]: For 1436035/1436039 co-relation queries the response was YES. [2024-06-03 19:16:46,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68282 conditions, 6338 events. 3902/6338 cut-off events. For 1436035/1436039 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40125 event pairs, 776 based on Foata normal form. 6/6295 useless extension candidates. Maximal degree in co-relation 68114. Up to 5432 conditions per place. [2024-06-03 19:16:46,652 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 359 selfloop transitions, 96 changer transitions 0/492 dead transitions. [2024-06-03 19:16:46,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 492 transitions, 7535 flow [2024-06-03 19:16:46,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:16:46,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:16:46,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-03 19:16:46,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-03 19:16:46,653 INFO L175 Difference]: Start difference. First operand has 342 places, 458 transitions, 5597 flow. Second operand 9 states and 180 transitions. [2024-06-03 19:16:46,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 492 transitions, 7535 flow [2024-06-03 19:16:48,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 492 transitions, 7270 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-03 19:16:48,996 INFO L231 Difference]: Finished difference. Result has 346 places, 470 transitions, 6029 flow [2024-06-03 19:16:48,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6029, PETRI_PLACES=346, PETRI_TRANSITIONS=470} [2024-06-03 19:16:48,997 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 301 predicate places. [2024-06-03 19:16:48,997 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 470 transitions, 6029 flow [2024-06-03 19:16:48,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:48,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:48,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:48,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 19:16:48,998 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:48,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:48,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1104797145, now seen corresponding path program 4 times [2024-06-03 19:16:48,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:48,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241738598] [2024-06-03 19:16:48,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:48,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:50,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:50,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241738598] [2024-06-03 19:16:50,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241738598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:50,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:50,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:16:50,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436472033] [2024-06-03 19:16:50,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:50,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:16:50,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:50,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:16:50,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:16:50,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:16:50,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 470 transitions, 6029 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:50,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:50,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:16:50,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:52,117 INFO L124 PetriNetUnfolderBase]: 3896/6331 cut-off events. [2024-06-03 19:16:52,117 INFO L125 PetriNetUnfolderBase]: For 1444909/1444913 co-relation queries the response was YES. [2024-06-03 19:16:52,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68634 conditions, 6331 events. 3896/6331 cut-off events. For 1444909/1444913 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 40101 event pairs, 775 based on Foata normal form. 6/6288 useless extension candidates. Maximal degree in co-relation 68463. Up to 5431 conditions per place. [2024-06-03 19:16:52,212 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 358 selfloop transitions, 96 changer transitions 0/491 dead transitions. [2024-06-03 19:16:52,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 491 transitions, 7527 flow [2024-06-03 19:16:52,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:16:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:16:52,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-03 19:16:52,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-03 19:16:52,213 INFO L175 Difference]: Start difference. First operand has 346 places, 470 transitions, 6029 flow. Second operand 9 states and 178 transitions. [2024-06-03 19:16:52,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 491 transitions, 7527 flow [2024-06-03 19:16:54,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 491 transitions, 7165 flow, removed 144 selfloop flow, removed 4 redundant places. [2024-06-03 19:16:54,708 INFO L231 Difference]: Finished difference. Result has 351 places, 470 transitions, 5867 flow [2024-06-03 19:16:54,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5667, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5867, PETRI_PLACES=351, PETRI_TRANSITIONS=470} [2024-06-03 19:16:54,709 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 306 predicate places. [2024-06-03 19:16:54,709 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 470 transitions, 5867 flow [2024-06-03 19:16:54,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:54,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:54,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:54,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 19:16:54,709 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:54,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:54,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1104797641, now seen corresponding path program 1 times [2024-06-03 19:16:54,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:54,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80675053] [2024-06-03 19:16:54,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:54,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:56,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:56,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80675053] [2024-06-03 19:16:56,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80675053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:56,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:56,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:16:56,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545279814] [2024-06-03 19:16:56,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:56,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:16:56,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:56,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:16:56,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:16:56,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:16:56,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 470 transitions, 5867 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:56,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:56,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:16:56,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:58,074 INFO L124 PetriNetUnfolderBase]: 3891/6330 cut-off events. [2024-06-03 19:16:58,074 INFO L125 PetriNetUnfolderBase]: For 1430429/1430437 co-relation queries the response was YES. [2024-06-03 19:16:58,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67995 conditions, 6330 events. 3891/6330 cut-off events. For 1430429/1430437 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 40130 event pairs, 756 based on Foata normal form. 9/6290 useless extension candidates. Maximal degree in co-relation 67822. Up to 5792 conditions per place. [2024-06-03 19:16:58,176 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 429 selfloop transitions, 25 changer transitions 0/491 dead transitions. [2024-06-03 19:16:58,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 491 transitions, 6972 flow [2024-06-03 19:16:58,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:16:58,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:16:58,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:16:58,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-03 19:16:58,178 INFO L175 Difference]: Start difference. First operand has 351 places, 470 transitions, 5867 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:16:58,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 491 transitions, 6972 flow [2024-06-03 19:17:01,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 491 transitions, 6745 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 19:17:01,050 INFO L231 Difference]: Finished difference. Result has 352 places, 473 transitions, 5840 flow [2024-06-03 19:17:01,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5644, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5840, PETRI_PLACES=352, PETRI_TRANSITIONS=473} [2024-06-03 19:17:01,051 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 307 predicate places. [2024-06-03 19:17:01,051 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 473 transitions, 5840 flow [2024-06-03 19:17:01,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:01,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:01,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:01,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 19:17:01,051 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:17:01,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:01,052 INFO L85 PathProgramCache]: Analyzing trace with hash -707166159, now seen corresponding path program 4 times [2024-06-03 19:17:01,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:01,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2772817] [2024-06-03 19:17:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:01,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:01,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:01,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2772817] [2024-06-03 19:17:01,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2772817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:01,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:01,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:17:01,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960423371] [2024-06-03 19:17:01,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:01,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:17:01,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:01,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:17:01,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:17:01,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:17:01,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 473 transitions, 5840 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:01,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:01,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:17:01,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:03,568 INFO L124 PetriNetUnfolderBase]: 4048/6515 cut-off events. [2024-06-03 19:17:03,568 INFO L125 PetriNetUnfolderBase]: For 1455492/1455494 co-relation queries the response was YES. [2024-06-03 19:17:03,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68924 conditions, 6515 events. 4048/6515 cut-off events. For 1455492/1455494 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 40617 event pairs, 826 based on Foata normal form. 1/6512 useless extension candidates. Maximal degree in co-relation 68751. Up to 5943 conditions per place. [2024-06-03 19:17:03,669 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 429 selfloop transitions, 63 changer transitions 0/497 dead transitions. [2024-06-03 19:17:03,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 497 transitions, 7004 flow [2024-06-03 19:17:03,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:17:03,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:17:03,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:17:03,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-03 19:17:03,670 INFO L175 Difference]: Start difference. First operand has 352 places, 473 transitions, 5840 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:17:03,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 497 transitions, 7004 flow [2024-06-03 19:17:06,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 497 transitions, 6840 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-03 19:17:06,133 INFO L231 Difference]: Finished difference. Result has 353 places, 476 transitions, 5926 flow [2024-06-03 19:17:06,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5676, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5926, PETRI_PLACES=353, PETRI_TRANSITIONS=476} [2024-06-03 19:17:06,133 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 308 predicate places. [2024-06-03 19:17:06,133 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 476 transitions, 5926 flow [2024-06-03 19:17:06,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:06,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:06,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:06,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 19:17:06,134 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:17:06,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:06,135 INFO L85 PathProgramCache]: Analyzing trace with hash -479265009, now seen corresponding path program 5 times [2024-06-03 19:17:06,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:06,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479141890] [2024-06-03 19:17:06,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:06,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:07,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:07,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479141890] [2024-06-03 19:17:07,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479141890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:07,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:07,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:17:07,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858211470] [2024-06-03 19:17:07,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:07,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:17:07,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:07,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:17:07,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:17:07,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:17:07,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 476 transitions, 5926 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:07,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:07,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:17:07,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:08,742 INFO L124 PetriNetUnfolderBase]: 4053/6519 cut-off events. [2024-06-03 19:17:08,743 INFO L125 PetriNetUnfolderBase]: For 1483130/1483136 co-relation queries the response was YES. [2024-06-03 19:17:08,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69459 conditions, 6519 events. 4053/6519 cut-off events. For 1483130/1483136 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 40610 event pairs, 826 based on Foata normal form. 2/6515 useless extension candidates. Maximal degree in co-relation 69285. Up to 5950 conditions per place. [2024-06-03 19:17:08,841 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 427 selfloop transitions, 67 changer transitions 0/499 dead transitions. [2024-06-03 19:17:08,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 499 transitions, 7094 flow [2024-06-03 19:17:08,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:17:08,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:17:08,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:17:08,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-03 19:17:08,842 INFO L175 Difference]: Start difference. First operand has 353 places, 476 transitions, 5926 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:17:08,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 499 transitions, 7094 flow [2024-06-03 19:17:11,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 499 transitions, 6870 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-03 19:17:11,658 INFO L231 Difference]: Finished difference. Result has 355 places, 479 transitions, 5966 flow [2024-06-03 19:17:11,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5702, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5966, PETRI_PLACES=355, PETRI_TRANSITIONS=479} [2024-06-03 19:17:11,659 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 310 predicate places. [2024-06-03 19:17:11,659 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 479 transitions, 5966 flow [2024-06-03 19:17:11,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:11,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:11,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:11,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 19:17:11,660 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:17:11,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:11,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1024646275, now seen corresponding path program 6 times [2024-06-03 19:17:11,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:11,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160263153] [2024-06-03 19:17:11,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:11,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:12,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:12,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160263153] [2024-06-03 19:17:12,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160263153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:12,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:12,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:17:12,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928281375] [2024-06-03 19:17:12,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:12,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:17:12,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:12,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:17:12,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:17:12,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:17:12,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 479 transitions, 5966 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:12,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:12,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:17:12,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:14,235 INFO L124 PetriNetUnfolderBase]: 4058/6526 cut-off events. [2024-06-03 19:17:14,235 INFO L125 PetriNetUnfolderBase]: For 1509246/1509252 co-relation queries the response was YES. [2024-06-03 19:17:14,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69870 conditions, 6526 events. 4058/6526 cut-off events. For 1509246/1509252 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 40687 event pairs, 825 based on Foata normal form. 2/6522 useless extension candidates. Maximal degree in co-relation 69695. Up to 5942 conditions per place. [2024-06-03 19:17:14,338 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 415 selfloop transitions, 79 changer transitions 0/499 dead transitions. [2024-06-03 19:17:14,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 499 transitions, 7132 flow [2024-06-03 19:17:14,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:17:14,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:17:14,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:17:14,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-03 19:17:14,339 INFO L175 Difference]: Start difference. First operand has 355 places, 479 transitions, 5966 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:17:14,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 499 transitions, 7132 flow [2024-06-03 19:17:17,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 499 transitions, 6894 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-03 19:17:17,471 INFO L231 Difference]: Finished difference. Result has 357 places, 482 transitions, 6024 flow [2024-06-03 19:17:17,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5728, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6024, PETRI_PLACES=357, PETRI_TRANSITIONS=482} [2024-06-03 19:17:17,471 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 312 predicate places. [2024-06-03 19:17:17,472 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 482 transitions, 6024 flow [2024-06-03 19:17:17,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:17,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:17,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:17,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 19:17:17,472 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:17:17,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:17,473 INFO L85 PathProgramCache]: Analyzing trace with hash -441239765, now seen corresponding path program 7 times [2024-06-03 19:17:17,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:17,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136251547] [2024-06-03 19:17:17,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:17,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:18,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:18,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136251547] [2024-06-03 19:17:18,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136251547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:18,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:18,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:17:18,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756312086] [2024-06-03 19:17:18,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:18,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:17:18,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:18,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:17:18,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:17:18,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:17:18,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 482 transitions, 6024 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:18,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:18,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:17:18,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:20,073 INFO L124 PetriNetUnfolderBase]: 4055/6522 cut-off events. [2024-06-03 19:17:20,074 INFO L125 PetriNetUnfolderBase]: For 1526463/1526469 co-relation queries the response was YES. [2024-06-03 19:17:20,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70095 conditions, 6522 events. 4055/6522 cut-off events. For 1526463/1526469 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 40630 event pairs, 825 based on Foata normal form. 2/6518 useless extension candidates. Maximal degree in co-relation 69919. Up to 5942 conditions per place. [2024-06-03 19:17:20,179 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 428 selfloop transitions, 70 changer transitions 0/503 dead transitions. [2024-06-03 19:17:20,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 503 transitions, 7204 flow [2024-06-03 19:17:20,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:17:20,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:17:20,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:17:20,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-03 19:17:20,180 INFO L175 Difference]: Start difference. First operand has 357 places, 482 transitions, 6024 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:17:20,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 503 transitions, 7204 flow [2024-06-03 19:17:23,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 503 transitions, 6930 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-03 19:17:23,297 INFO L231 Difference]: Finished difference. Result has 359 places, 485 transitions, 6028 flow [2024-06-03 19:17:23,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5750, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6028, PETRI_PLACES=359, PETRI_TRANSITIONS=485} [2024-06-03 19:17:23,298 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 314 predicate places. [2024-06-03 19:17:23,298 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 485 transitions, 6028 flow [2024-06-03 19:17:23,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:23,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:23,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:23,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 19:17:23,298 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:17:23,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:23,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1033953833, now seen corresponding path program 4 times [2024-06-03 19:17:23,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:23,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249652506] [2024-06-03 19:17:23,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:23,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:24,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:24,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249652506] [2024-06-03 19:17:24,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249652506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:24,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:24,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:17:24,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313683817] [2024-06-03 19:17:24,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:24,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:17:24,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:24,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:17:24,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:17:24,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:17:24,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 485 transitions, 6028 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:24,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:24,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:17:24,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:26,257 INFO L124 PetriNetUnfolderBase]: 3894/6321 cut-off events. [2024-06-03 19:17:26,257 INFO L125 PetriNetUnfolderBase]: For 1545345/1545351 co-relation queries the response was YES. [2024-06-03 19:17:26,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69065 conditions, 6321 events. 3894/6321 cut-off events. For 1545345/1545351 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 39901 event pairs, 778 based on Foata normal form. 2/6271 useless extension candidates. Maximal degree in co-relation 68888. Up to 5664 conditions per place. [2024-06-03 19:17:26,358 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 409 selfloop transitions, 52 changer transitions 0/502 dead transitions. [2024-06-03 19:17:26,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 502 transitions, 7004 flow [2024-06-03 19:17:26,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:17:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:17:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:17:26,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-03 19:17:26,360 INFO L175 Difference]: Start difference. First operand has 359 places, 485 transitions, 6028 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:17:26,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 502 transitions, 7004 flow [2024-06-03 19:17:29,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 502 transitions, 6718 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-03 19:17:29,343 INFO L231 Difference]: Finished difference. Result has 361 places, 485 transitions, 5852 flow [2024-06-03 19:17:29,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5742, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5852, PETRI_PLACES=361, PETRI_TRANSITIONS=485} [2024-06-03 19:17:29,343 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 316 predicate places. [2024-06-03 19:17:29,343 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 485 transitions, 5852 flow [2024-06-03 19:17:29,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:29,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:29,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:29,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 19:17:29,344 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:17:29,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:29,344 INFO L85 PathProgramCache]: Analyzing trace with hash -694964559, now seen corresponding path program 8 times [2024-06-03 19:17:29,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:29,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273113184] [2024-06-03 19:17:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:29,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:30,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:30,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273113184] [2024-06-03 19:17:30,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273113184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:30,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:30,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:17:30,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999597435] [2024-06-03 19:17:30,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:30,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:17:30,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:30,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:17:30,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:17:30,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:17:30,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 485 transitions, 5852 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:30,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:30,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:17:30,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:32,263 INFO L124 PetriNetUnfolderBase]: 4059/6526 cut-off events. [2024-06-03 19:17:32,263 INFO L125 PetriNetUnfolderBase]: For 1579539/1579545 co-relation queries the response was YES. [2024-06-03 19:17:32,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70534 conditions, 6526 events. 4059/6526 cut-off events. For 1579539/1579545 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 40691 event pairs, 825 based on Foata normal form. 2/6522 useless extension candidates. Maximal degree in co-relation 70356. Up to 5883 conditions per place. [2024-06-03 19:17:32,361 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 397 selfloop transitions, 104 changer transitions 0/506 dead transitions. [2024-06-03 19:17:32,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 506 transitions, 7406 flow [2024-06-03 19:17:32,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:17:32,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:17:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:17:32,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-03 19:17:32,363 INFO L175 Difference]: Start difference. First operand has 361 places, 485 transitions, 5852 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:17:32,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 506 transitions, 7406 flow [2024-06-03 19:17:35,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 506 transitions, 7215 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-03 19:17:35,163 INFO L231 Difference]: Finished difference. Result has 361 places, 491 transitions, 6149 flow [2024-06-03 19:17:35,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5661, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6149, PETRI_PLACES=361, PETRI_TRANSITIONS=491} [2024-06-03 19:17:35,164 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 316 predicate places. [2024-06-03 19:17:35,164 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 491 transitions, 6149 flow [2024-06-03 19:17:35,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:35,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:35,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:35,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 19:17:35,164 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:17:35,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:35,164 INFO L85 PathProgramCache]: Analyzing trace with hash -885386843, now seen corresponding path program 5 times [2024-06-03 19:17:35,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:35,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196669709] [2024-06-03 19:17:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:35,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:36,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:36,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196669709] [2024-06-03 19:17:36,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196669709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:36,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:36,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:17:36,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922068974] [2024-06-03 19:17:36,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:36,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:17:36,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:36,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:17:36,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:17:36,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:17:36,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 491 transitions, 6149 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:36,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:36,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:17:36,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:38,107 INFO L124 PetriNetUnfolderBase]: 3912/6346 cut-off events. [2024-06-03 19:17:38,107 INFO L125 PetriNetUnfolderBase]: For 1606746/1606752 co-relation queries the response was YES. [2024-06-03 19:17:38,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70156 conditions, 6346 events. 3912/6346 cut-off events. For 1606746/1606752 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 40108 event pairs, 779 based on Foata normal form. 2/6296 useless extension candidates. Maximal degree in co-relation 69977. Up to 5656 conditions per place. [2024-06-03 19:17:38,203 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 396 selfloop transitions, 69 changer transitions 0/508 dead transitions. [2024-06-03 19:17:38,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 508 transitions, 7197 flow [2024-06-03 19:17:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:17:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:17:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:17:38,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-03 19:17:38,204 INFO L175 Difference]: Start difference. First operand has 361 places, 491 transitions, 6149 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:17:38,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 508 transitions, 7197 flow [2024-06-03 19:17:41,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 508 transitions, 6929 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-06-03 19:17:41,739 INFO L231 Difference]: Finished difference. Result has 365 places, 494 transitions, 6107 flow [2024-06-03 19:17:41,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5881, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6107, PETRI_PLACES=365, PETRI_TRANSITIONS=494} [2024-06-03 19:17:41,739 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 320 predicate places. [2024-06-03 19:17:41,739 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 494 transitions, 6107 flow [2024-06-03 19:17:41,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:41,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:41,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:41,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 19:17:41,740 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:17:41,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:41,740 INFO L85 PathProgramCache]: Analyzing trace with hash -293204311, now seen corresponding path program 6 times [2024-06-03 19:17:41,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:41,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513785803] [2024-06-03 19:17:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:41,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:42,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:42,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513785803] [2024-06-03 19:17:42,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513785803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:42,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:42,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:17:42,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018112774] [2024-06-03 19:17:42,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:42,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:17:42,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:42,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:17:42,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:17:43,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:17:43,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 494 transitions, 6107 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:43,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:43,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:17:43,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:44,699 INFO L124 PetriNetUnfolderBase]: 3917/6353 cut-off events. [2024-06-03 19:17:44,699 INFO L125 PetriNetUnfolderBase]: For 1629957/1629963 co-relation queries the response was YES. [2024-06-03 19:17:44,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70474 conditions, 6353 events. 3917/6353 cut-off events. For 1629957/1629963 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 40161 event pairs, 777 based on Foata normal form. 2/6303 useless extension candidates. Maximal degree in co-relation 70293. Up to 5640 conditions per place. [2024-06-03 19:17:44,798 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 388 selfloop transitions, 81 changer transitions 0/512 dead transitions. [2024-06-03 19:17:44,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 512 transitions, 7182 flow [2024-06-03 19:17:44,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:17:44,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:17:44,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 19:17:44,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-03 19:17:44,799 INFO L175 Difference]: Start difference. First operand has 365 places, 494 transitions, 6107 flow. Second operand 8 states and 155 transitions. [2024-06-03 19:17:44,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 512 transitions, 7182 flow [2024-06-03 19:17:48,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 512 transitions, 6994 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 19:17:48,079 INFO L231 Difference]: Finished difference. Result has 368 places, 498 transitions, 6209 flow [2024-06-03 19:17:48,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5919, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6209, PETRI_PLACES=368, PETRI_TRANSITIONS=498} [2024-06-03 19:17:48,079 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 323 predicate places. [2024-06-03 19:17:48,079 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 498 transitions, 6209 flow [2024-06-03 19:17:48,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:48,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:48,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:48,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 19:17:48,080 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:17:48,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:48,080 INFO L85 PathProgramCache]: Analyzing trace with hash -427193045, now seen corresponding path program 9 times [2024-06-03 19:17:48,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:48,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260788149] [2024-06-03 19:17:48,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:48,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:49,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:49,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260788149] [2024-06-03 19:17:49,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260788149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:49,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:49,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:17:49,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435716402] [2024-06-03 19:17:49,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:49,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:17:49,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:49,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:17:49,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:17:49,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:17:49,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 498 transitions, 6209 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:49,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:49,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:17:49,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:50,781 INFO L124 PetriNetUnfolderBase]: 4066/6536 cut-off events. [2024-06-03 19:17:50,781 INFO L125 PetriNetUnfolderBase]: For 1649948/1649954 co-relation queries the response was YES. [2024-06-03 19:17:50,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71528 conditions, 6536 events. 4066/6536 cut-off events. For 1649948/1649954 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 40744 event pairs, 824 based on Foata normal form. 2/6532 useless extension candidates. Maximal degree in co-relation 71345. Up to 5894 conditions per place. [2024-06-03 19:17:50,887 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 400 selfloop transitions, 107 changer transitions 0/512 dead transitions. [2024-06-03 19:17:50,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 512 transitions, 7265 flow [2024-06-03 19:17:50,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:17:50,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:17:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:17:50,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-03 19:17:50,890 INFO L175 Difference]: Start difference. First operand has 368 places, 498 transitions, 6209 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:17:50,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 512 transitions, 7265 flow [2024-06-03 19:17:53,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 512 transitions, 6960 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-03 19:17:53,794 INFO L231 Difference]: Finished difference. Result has 371 places, 498 transitions, 6124 flow [2024-06-03 19:17:53,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5904, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6124, PETRI_PLACES=371, PETRI_TRANSITIONS=498} [2024-06-03 19:17:53,795 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 326 predicate places. [2024-06-03 19:17:53,795 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 498 transitions, 6124 flow [2024-06-03 19:17:53,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:53,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:53,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:53,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 19:17:53,795 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:17:53,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:53,796 INFO L85 PathProgramCache]: Analyzing trace with hash -130491484, now seen corresponding path program 2 times [2024-06-03 19:17:53,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:53,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483115764] [2024-06-03 19:17:53,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:53,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:54,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:54,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483115764] [2024-06-03 19:17:54,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483115764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:54,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:54,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:17:54,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125081071] [2024-06-03 19:17:54,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:54,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:17:54,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:54,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:17:54,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:17:55,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:17:55,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 498 transitions, 6124 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:55,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:55,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:17:55,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:57,039 INFO L124 PetriNetUnfolderBase]: 4189/6795 cut-off events. [2024-06-03 19:17:57,039 INFO L125 PetriNetUnfolderBase]: For 1724305/1724313 co-relation queries the response was YES. [2024-06-03 19:17:57,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72872 conditions, 6795 events. 4189/6795 cut-off events. For 1724305/1724313 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 43216 event pairs, 860 based on Foata normal form. 15/6808 useless extension candidates. Maximal degree in co-relation 72688. Up to 5658 conditions per place. [2024-06-03 19:17:57,153 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 435 selfloop transitions, 104 changer transitions 0/544 dead transitions. [2024-06-03 19:17:57,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 544 transitions, 7494 flow [2024-06-03 19:17:57,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:17:57,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:17:57,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-03 19:17:57,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-03 19:17:57,155 INFO L175 Difference]: Start difference. First operand has 371 places, 498 transitions, 6124 flow. Second operand 10 states and 199 transitions. [2024-06-03 19:17:57,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 544 transitions, 7494 flow [2024-06-03 19:18:01,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 544 transitions, 7262 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 19:18:01,379 INFO L231 Difference]: Finished difference. Result has 376 places, 506 transitions, 6246 flow [2024-06-03 19:18:01,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5892, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6246, PETRI_PLACES=376, PETRI_TRANSITIONS=506} [2024-06-03 19:18:01,379 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 331 predicate places. [2024-06-03 19:18:01,379 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 506 transitions, 6246 flow [2024-06-03 19:18:01,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:01,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:01,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:01,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 19:18:01,379 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:18:01,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:01,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1185003332, now seen corresponding path program 3 times [2024-06-03 19:18:01,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:01,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632968603] [2024-06-03 19:18:01,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:01,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:02,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:02,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632968603] [2024-06-03 19:18:02,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632968603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:02,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:02,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:18:02,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184313837] [2024-06-03 19:18:02,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:02,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:18:02,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:02,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:18:02,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:18:02,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:18:02,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 506 transitions, 6246 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:02,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:02,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:18:02,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:04,865 INFO L124 PetriNetUnfolderBase]: 4299/6995 cut-off events. [2024-06-03 19:18:04,865 INFO L125 PetriNetUnfolderBase]: For 1758381/1758389 co-relation queries the response was YES. [2024-06-03 19:18:04,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74789 conditions, 6995 events. 4299/6995 cut-off events. For 1758381/1758389 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 44990 event pairs, 885 based on Foata normal form. 15/7008 useless extension candidates. Maximal degree in co-relation 74602. Up to 5931 conditions per place. [2024-06-03 19:18:04,985 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 429 selfloop transitions, 117 changer transitions 0/551 dead transitions. [2024-06-03 19:18:04,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 551 transitions, 7632 flow [2024-06-03 19:18:04,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:18:04,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:18:04,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-03 19:18:04,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-03 19:18:04,986 INFO L175 Difference]: Start difference. First operand has 376 places, 506 transitions, 6246 flow. Second operand 10 states and 197 transitions. [2024-06-03 19:18:04,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 551 transitions, 7632 flow [2024-06-03 19:18:08,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 551 transitions, 7408 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 19:18:08,765 INFO L231 Difference]: Finished difference. Result has 383 places, 514 transitions, 6429 flow [2024-06-03 19:18:08,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6032, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6429, PETRI_PLACES=383, PETRI_TRANSITIONS=514} [2024-06-03 19:18:08,766 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 338 predicate places. [2024-06-03 19:18:08,766 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 514 transitions, 6429 flow [2024-06-03 19:18:08,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:08,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:08,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:08,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 19:18:08,766 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:18:08,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:08,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1173961442, now seen corresponding path program 4 times [2024-06-03 19:18:08,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:08,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352343056] [2024-06-03 19:18:08,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:08,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:10,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:10,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352343056] [2024-06-03 19:18:10,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352343056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:10,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:10,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:18:10,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413536340] [2024-06-03 19:18:10,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:10,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:18:10,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:10,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:18:10,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:18:10,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:18:10,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 514 transitions, 6429 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:10,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:10,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:18:10,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:12,093 INFO L124 PetriNetUnfolderBase]: 4320/7044 cut-off events. [2024-06-03 19:18:12,094 INFO L125 PetriNetUnfolderBase]: For 1730128/1730136 co-relation queries the response was YES. [2024-06-03 19:18:12,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74355 conditions, 7044 events. 4320/7044 cut-off events. For 1730128/1730136 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45529 event pairs, 751 based on Foata normal form. 15/7057 useless extension candidates. Maximal degree in co-relation 74165. Up to 4901 conditions per place. [2024-06-03 19:18:12,220 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 416 selfloop transitions, 133 changer transitions 0/554 dead transitions. [2024-06-03 19:18:12,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 554 transitions, 7972 flow [2024-06-03 19:18:12,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:18:12,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:18:12,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-03 19:18:12,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-03 19:18:12,222 INFO L175 Difference]: Start difference. First operand has 383 places, 514 transitions, 6429 flow. Second operand 10 states and 198 transitions. [2024-06-03 19:18:12,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 554 transitions, 7972 flow [2024-06-03 19:18:15,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 554 transitions, 7781 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-03 19:18:15,458 INFO L231 Difference]: Finished difference. Result has 390 places, 515 transitions, 6568 flow [2024-06-03 19:18:15,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6238, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6568, PETRI_PLACES=390, PETRI_TRANSITIONS=515} [2024-06-03 19:18:15,458 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 345 predicate places. [2024-06-03 19:18:15,459 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 515 transitions, 6568 flow [2024-06-03 19:18:15,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:15,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:15,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:15,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 19:18:15,459 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:18:15,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:15,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1777625374, now seen corresponding path program 5 times [2024-06-03 19:18:15,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:15,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834863667] [2024-06-03 19:18:15,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:15,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:16,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:16,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834863667] [2024-06-03 19:18:16,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834863667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:16,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:16,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:18:16,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354259947] [2024-06-03 19:18:16,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:16,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:18:16,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:16,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:18:16,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:18:16,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:18:16,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 515 transitions, 6568 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:16,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:16,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:18:16,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:18,751 INFO L124 PetriNetUnfolderBase]: 4300/7012 cut-off events. [2024-06-03 19:18:18,751 INFO L125 PetriNetUnfolderBase]: For 1696511/1696519 co-relation queries the response was YES. [2024-06-03 19:18:18,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72835 conditions, 7012 events. 4300/7012 cut-off events. For 1696511/1696519 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 45300 event pairs, 872 based on Foata normal form. 15/7025 useless extension candidates. Maximal degree in co-relation 72643. Up to 5938 conditions per place. [2024-06-03 19:18:18,877 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 434 selfloop transitions, 112 changer transitions 0/551 dead transitions. [2024-06-03 19:18:18,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 551 transitions, 7714 flow [2024-06-03 19:18:18,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:18:18,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:18:18,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-03 19:18:18,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-03 19:18:18,879 INFO L175 Difference]: Start difference. First operand has 390 places, 515 transitions, 6568 flow. Second operand 10 states and 197 transitions. [2024-06-03 19:18:18,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 551 transitions, 7714 flow [2024-06-03 19:18:23,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 551 transitions, 7356 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-03 19:18:23,534 INFO L231 Difference]: Finished difference. Result has 391 places, 514 transitions, 6320 flow [2024-06-03 19:18:23,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6092, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6320, PETRI_PLACES=391, PETRI_TRANSITIONS=514} [2024-06-03 19:18:23,535 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 346 predicate places. [2024-06-03 19:18:23,535 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 514 transitions, 6320 flow [2024-06-03 19:18:23,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:23,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:23,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:23,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 19:18:23,536 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:18:23,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:23,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1065373499, now seen corresponding path program 7 times [2024-06-03 19:18:23,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:23,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115492749] [2024-06-03 19:18:23,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:23,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:24,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:24,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115492749] [2024-06-03 19:18:24,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115492749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:24,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:24,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:18:24,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373652362] [2024-06-03 19:18:24,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:24,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:18:24,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:24,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:18:24,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:18:24,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:18:24,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 514 transitions, 6320 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:24,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:24,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:18:24,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:26,589 INFO L124 PetriNetUnfolderBase]: 4171/6851 cut-off events. [2024-06-03 19:18:26,589 INFO L125 PetriNetUnfolderBase]: For 1684250/1684258 co-relation queries the response was YES. [2024-06-03 19:18:26,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71684 conditions, 6851 events. 4171/6851 cut-off events. For 1684250/1684258 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 44842 event pairs, 852 based on Foata normal form. 4/6805 useless extension candidates. Maximal degree in co-relation 71492. Up to 6004 conditions per place. [2024-06-03 19:18:26,709 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 396 selfloop transitions, 94 changer transitions 0/533 dead transitions. [2024-06-03 19:18:26,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 533 transitions, 7783 flow [2024-06-03 19:18:26,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:18:26,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:18:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:18:26,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-03 19:18:26,711 INFO L175 Difference]: Start difference. First operand has 391 places, 514 transitions, 6320 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:18:26,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 533 transitions, 7783 flow [2024-06-03 19:18:30,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 533 transitions, 7293 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-03 19:18:30,367 INFO L231 Difference]: Finished difference. Result has 388 places, 522 transitions, 6254 flow [2024-06-03 19:18:30,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5830, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6254, PETRI_PLACES=388, PETRI_TRANSITIONS=522} [2024-06-03 19:18:30,368 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 343 predicate places. [2024-06-03 19:18:30,368 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 522 transitions, 6254 flow [2024-06-03 19:18:30,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:30,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:30,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:30,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 19:18:30,368 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:18:30,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:30,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1065848977, now seen corresponding path program 10 times [2024-06-03 19:18:30,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:30,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596015301] [2024-06-03 19:18:30,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:30,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:31,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:31,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596015301] [2024-06-03 19:18:31,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596015301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:31,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:31,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:18:31,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496888365] [2024-06-03 19:18:31,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:31,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:18:31,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:31,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:18:31,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:18:31,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:18:31,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 522 transitions, 6254 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:31,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:31,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:18:31,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:33,229 INFO L124 PetriNetUnfolderBase]: 4342/7074 cut-off events. [2024-06-03 19:18:33,229 INFO L125 PetriNetUnfolderBase]: For 1726623/1726631 co-relation queries the response was YES. [2024-06-03 19:18:33,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72509 conditions, 7074 events. 4342/7074 cut-off events. For 1726623/1726631 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45789 event pairs, 917 based on Foata normal form. 4/7076 useless extension candidates. Maximal degree in co-relation 72319. Up to 6220 conditions per place. [2024-06-03 19:18:33,350 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 421 selfloop transitions, 122 changer transitions 0/548 dead transitions. [2024-06-03 19:18:33,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 548 transitions, 8704 flow [2024-06-03 19:18:33,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:18:33,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:18:33,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:18:33,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-03 19:18:33,351 INFO L175 Difference]: Start difference. First operand has 388 places, 522 transitions, 6254 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:18:33,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 548 transitions, 8704 flow [2024-06-03 19:18:37,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 548 transitions, 8463 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-03 19:18:37,361 INFO L231 Difference]: Finished difference. Result has 391 places, 535 transitions, 6829 flow [2024-06-03 19:18:37,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6013, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6829, PETRI_PLACES=391, PETRI_TRANSITIONS=535} [2024-06-03 19:18:37,361 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 346 predicate places. [2024-06-03 19:18:37,361 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 535 transitions, 6829 flow [2024-06-03 19:18:37,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:37,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:37,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:37,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 19:18:37,362 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:18:37,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:37,363 INFO L85 PathProgramCache]: Analyzing trace with hash -914395415, now seen corresponding path program 8 times [2024-06-03 19:18:37,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:37,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523830824] [2024-06-03 19:18:37,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:37,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:38,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:38,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523830824] [2024-06-03 19:18:38,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523830824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:38,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:38,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:18:38,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776740420] [2024-06-03 19:18:38,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:38,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:18:38,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:38,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:18:38,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:18:38,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:18:38,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 535 transitions, 6829 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:38,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:38,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:18:38,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:40,528 INFO L124 PetriNetUnfolderBase]: 4194/6885 cut-off events. [2024-06-03 19:18:40,529 INFO L125 PetriNetUnfolderBase]: For 1752797/1752805 co-relation queries the response was YES. [2024-06-03 19:18:40,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72123 conditions, 6885 events. 4194/6885 cut-off events. For 1752797/1752805 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 45050 event pairs, 852 based on Foata normal form. 5/6840 useless extension candidates. Maximal degree in co-relation 71932. Up to 6044 conditions per place. [2024-06-03 19:18:40,640 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 420 selfloop transitions, 81 changer transitions 0/548 dead transitions. [2024-06-03 19:18:40,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 548 transitions, 7943 flow [2024-06-03 19:18:40,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:18:40,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:18:40,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:18:40,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-03 19:18:40,641 INFO L175 Difference]: Start difference. First operand has 391 places, 535 transitions, 6829 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:18:40,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 548 transitions, 7943 flow [2024-06-03 19:18:44,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 548 transitions, 7686 flow, removed 107 selfloop flow, removed 2 redundant places. [2024-06-03 19:18:44,626 INFO L231 Difference]: Finished difference. Result has 397 places, 538 transitions, 6833 flow [2024-06-03 19:18:44,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6572, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6833, PETRI_PLACES=397, PETRI_TRANSITIONS=538} [2024-06-03 19:18:44,626 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 352 predicate places. [2024-06-03 19:18:44,627 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 538 transitions, 6833 flow [2024-06-03 19:18:44,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:44,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:44,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:44,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 19:18:44,627 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:18:44,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:44,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2136440143, now seen corresponding path program 11 times [2024-06-03 19:18:44,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:44,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519964603] [2024-06-03 19:18:44,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:44,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:45,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:45,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519964603] [2024-06-03 19:18:45,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519964603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:45,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:45,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:18:45,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192593303] [2024-06-03 19:18:45,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:45,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:18:45,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:45,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:18:45,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:18:45,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:18:45,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 538 transitions, 6833 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:45,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:45,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:18:45,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:47,621 INFO L124 PetriNetUnfolderBase]: 4338/7069 cut-off events. [2024-06-03 19:18:47,621 INFO L125 PetriNetUnfolderBase]: For 1751723/1751731 co-relation queries the response was YES. [2024-06-03 19:18:47,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72156 conditions, 7069 events. 4338/7069 cut-off events. For 1751723/1751731 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 45756 event pairs, 919 based on Foata normal form. 5/7072 useless extension candidates. Maximal degree in co-relation 71963. Up to 6218 conditions per place. [2024-06-03 19:18:47,743 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 428 selfloop transitions, 117 changer transitions 0/550 dead transitions. [2024-06-03 19:18:47,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 550 transitions, 8477 flow [2024-06-03 19:18:47,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:18:47,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:18:47,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:18:47,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-03 19:18:47,744 INFO L175 Difference]: Start difference. First operand has 397 places, 538 transitions, 6833 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:18:47,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 550 transitions, 8477 flow [2024-06-03 19:18:51,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 550 transitions, 8148 flow, removed 86 selfloop flow, removed 6 redundant places. [2024-06-03 19:18:51,568 INFO L231 Difference]: Finished difference. Result has 399 places, 538 transitions, 6745 flow [2024-06-03 19:18:51,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6504, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6745, PETRI_PLACES=399, PETRI_TRANSITIONS=538} [2024-06-03 19:18:51,568 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 354 predicate places. [2024-06-03 19:18:51,568 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 538 transitions, 6745 flow [2024-06-03 19:18:51,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:51,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:51,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:51,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 19:18:51,569 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:18:51,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:51,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1468829815, now seen corresponding path program 9 times [2024-06-03 19:18:51,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:51,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570150964] [2024-06-03 19:18:51,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:51,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:52,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:52,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570150964] [2024-06-03 19:18:52,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570150964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:52,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:52,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:18:52,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493565785] [2024-06-03 19:18:52,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:52,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:18:52,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:52,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:18:52,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:18:52,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:18:52,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 538 transitions, 6745 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:52,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:52,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:18:52,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:54,578 INFO L124 PetriNetUnfolderBase]: 4182/6867 cut-off events. [2024-06-03 19:18:54,578 INFO L125 PetriNetUnfolderBase]: For 1756034/1756042 co-relation queries the response was YES. [2024-06-03 19:18:54,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70864 conditions, 6867 events. 4182/6867 cut-off events. For 1756034/1756042 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 44912 event pairs, 852 based on Foata normal form. 5/6822 useless extension candidates. Maximal degree in co-relation 70670. Up to 5993 conditions per place. [2024-06-03 19:18:54,691 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 407 selfloop transitions, 95 changer transitions 0/549 dead transitions. [2024-06-03 19:18:54,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 549 transitions, 8041 flow [2024-06-03 19:18:54,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:18:54,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:18:54,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:18:54,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-03 19:18:54,692 INFO L175 Difference]: Start difference. First operand has 399 places, 538 transitions, 6745 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:18:54,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 549 transitions, 8041 flow [2024-06-03 19:18:59,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 549 transitions, 7683 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-03 19:18:59,716 INFO L231 Difference]: Finished difference. Result has 399 places, 538 transitions, 6586 flow [2024-06-03 19:18:59,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6387, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6586, PETRI_PLACES=399, PETRI_TRANSITIONS=538} [2024-06-03 19:18:59,717 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 354 predicate places. [2024-06-03 19:18:59,717 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 538 transitions, 6586 flow [2024-06-03 19:18:59,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:59,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:59,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:59,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 19:18:59,717 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:18:59,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:59,717 INFO L85 PathProgramCache]: Analyzing trace with hash -780273629, now seen corresponding path program 10 times [2024-06-03 19:18:59,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:59,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768770959] [2024-06-03 19:18:59,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:59,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:01,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:01,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768770959] [2024-06-03 19:19:01,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768770959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:01,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:01,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:19:01,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065915603] [2024-06-03 19:19:01,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:01,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:19:01,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:01,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:19:01,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:19:01,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:19:01,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 538 transitions, 6586 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:01,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:01,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:19:01,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:03,258 INFO L124 PetriNetUnfolderBase]: 4187/6876 cut-off events. [2024-06-03 19:19:03,258 INFO L125 PetriNetUnfolderBase]: For 1770219/1770227 co-relation queries the response was YES. [2024-06-03 19:19:03,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70804 conditions, 6876 events. 4187/6876 cut-off events. For 1770219/1770227 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 44981 event pairs, 852 based on Foata normal form. 4/6830 useless extension candidates. Maximal degree in co-relation 70611. Up to 5895 conditions per place. [2024-06-03 19:19:03,381 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 362 selfloop transitions, 144 changer transitions 0/553 dead transitions. [2024-06-03 19:19:03,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 553 transitions, 8248 flow [2024-06-03 19:19:03,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:03,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 19:19:03,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-03 19:19:03,382 INFO L175 Difference]: Start difference. First operand has 399 places, 538 transitions, 6586 flow. Second operand 8 states and 155 transitions. [2024-06-03 19:19:03,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 553 transitions, 8248 flow [2024-06-03 19:19:07,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 553 transitions, 8014 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-03 19:19:07,589 INFO L231 Difference]: Finished difference. Result has 402 places, 541 transitions, 6734 flow [2024-06-03 19:19:07,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6352, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6734, PETRI_PLACES=402, PETRI_TRANSITIONS=541} [2024-06-03 19:19:07,589 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 357 predicate places. [2024-06-03 19:19:07,589 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 541 transitions, 6734 flow [2024-06-03 19:19:07,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:07,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:07,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:07,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 19:19:07,590 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:19:07,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:07,590 INFO L85 PathProgramCache]: Analyzing trace with hash -785987549, now seen corresponding path program 11 times [2024-06-03 19:19:07,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:07,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423768796] [2024-06-03 19:19:07,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:07,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:08,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:08,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423768796] [2024-06-03 19:19:08,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423768796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:08,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:08,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:19:08,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956081004] [2024-06-03 19:19:08,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:08,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:19:08,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:08,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:19:08,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:19:08,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:19:08,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 541 transitions, 6734 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:08,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:08,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:19:08,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:10,640 INFO L124 PetriNetUnfolderBase]: 4179/6862 cut-off events. [2024-06-03 19:19:10,640 INFO L125 PetriNetUnfolderBase]: For 1788965/1788973 co-relation queries the response was YES. [2024-06-03 19:19:10,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70682 conditions, 6862 events. 4179/6862 cut-off events. For 1788965/1788973 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 44864 event pairs, 854 based on Foata normal form. 5/6817 useless extension candidates. Maximal degree in co-relation 70488. Up to 5887 conditions per place. [2024-06-03 19:19:10,769 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 369 selfloop transitions, 136 changer transitions 0/552 dead transitions. [2024-06-03 19:19:10,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 552 transitions, 8040 flow [2024-06-03 19:19:10,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:10,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:10,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 19:19:10,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-03 19:19:10,770 INFO L175 Difference]: Start difference. First operand has 402 places, 541 transitions, 6734 flow. Second operand 8 states and 155 transitions. [2024-06-03 19:19:10,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 552 transitions, 8040 flow [2024-06-03 19:19:15,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 552 transitions, 7558 flow, removed 82 selfloop flow, removed 8 redundant places. [2024-06-03 19:19:15,097 INFO L231 Difference]: Finished difference. Result has 402 places, 541 transitions, 6532 flow [2024-06-03 19:19:15,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6252, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6532, PETRI_PLACES=402, PETRI_TRANSITIONS=541} [2024-06-03 19:19:15,098 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 357 predicate places. [2024-06-03 19:19:15,098 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 541 transitions, 6532 flow [2024-06-03 19:19:15,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:15,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:15,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:15,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 19:19:15,098 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:19:15,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:15,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1464478593, now seen corresponding path program 12 times [2024-06-03 19:19:15,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:15,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658965370] [2024-06-03 19:19:15,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:15,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:15,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:16,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:16,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658965370] [2024-06-03 19:19:16,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658965370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:16,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:16,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:19:16,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440599240] [2024-06-03 19:19:16,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:16,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:19:16,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:16,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:19:16,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:19:16,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:19:16,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 541 transitions, 6532 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:16,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:16,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:19:16,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:17,856 INFO L124 PetriNetUnfolderBase]: 4326/7052 cut-off events. [2024-06-03 19:19:17,856 INFO L125 PetriNetUnfolderBase]: For 1796911/1796919 co-relation queries the response was YES. [2024-06-03 19:19:17,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71343 conditions, 7052 events. 4326/7052 cut-off events. For 1796911/1796919 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 45655 event pairs, 919 based on Foata normal form. 4/7054 useless extension candidates. Maximal degree in co-relation 71151. Up to 6204 conditions per place. [2024-06-03 19:19:17,977 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 423 selfloop transitions, 124 changer transitions 0/552 dead transitions. [2024-06-03 19:19:17,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 552 transitions, 7924 flow [2024-06-03 19:19:17,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:17,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 19:19:17,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-03 19:19:17,978 INFO L175 Difference]: Start difference. First operand has 402 places, 541 transitions, 6532 flow. Second operand 8 states and 148 transitions. [2024-06-03 19:19:17,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 552 transitions, 7924 flow [2024-06-03 19:19:22,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 552 transitions, 7536 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-03 19:19:22,446 INFO L231 Difference]: Finished difference. Result has 403 places, 541 transitions, 6398 flow [2024-06-03 19:19:22,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6144, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6398, PETRI_PLACES=403, PETRI_TRANSITIONS=541} [2024-06-03 19:19:22,447 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 358 predicate places. [2024-06-03 19:19:22,447 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 541 transitions, 6398 flow [2024-06-03 19:19:22,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:22,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:22,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:22,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 19:19:22,448 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:19:22,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:22,449 INFO L85 PathProgramCache]: Analyzing trace with hash -962425269, now seen corresponding path program 12 times [2024-06-03 19:19:22,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:22,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307284896] [2024-06-03 19:19:22,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:22,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:23,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:23,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307284896] [2024-06-03 19:19:23,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307284896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:23,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:23,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:19:23,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949133563] [2024-06-03 19:19:23,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:23,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:19:23,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:23,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:19:23,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:19:23,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:19:23,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 541 transitions, 6398 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:23,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:23,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:19:23,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:25,684 INFO L124 PetriNetUnfolderBase]: 4167/6844 cut-off events. [2024-06-03 19:19:25,684 INFO L125 PetriNetUnfolderBase]: For 1810629/1810637 co-relation queries the response was YES. [2024-06-03 19:19:25,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70168 conditions, 6844 events. 4167/6844 cut-off events. For 1810629/1810637 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 44773 event pairs, 850 based on Foata normal form. 4/6798 useless extension candidates. Maximal degree in co-relation 69975. Up to 6019 conditions per place. [2024-06-03 19:19:25,819 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 420 selfloop transitions, 84 changer transitions 0/551 dead transitions. [2024-06-03 19:19:25,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 551 transitions, 7432 flow [2024-06-03 19:19:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:25,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:19:25,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-03 19:19:25,821 INFO L175 Difference]: Start difference. First operand has 403 places, 541 transitions, 6398 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:19:25,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 551 transitions, 7432 flow [2024-06-03 19:19:30,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 551 transitions, 7094 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-03 19:19:30,061 INFO L231 Difference]: Finished difference. Result has 403 places, 541 transitions, 6234 flow [2024-06-03 19:19:30,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6060, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6234, PETRI_PLACES=403, PETRI_TRANSITIONS=541} [2024-06-03 19:19:30,061 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 358 predicate places. [2024-06-03 19:19:30,062 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 541 transitions, 6234 flow [2024-06-03 19:19:30,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:30,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:30,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:30,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 19:19:30,062 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:19:30,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:30,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1469249865, now seen corresponding path program 4 times [2024-06-03 19:19:30,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:30,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010711166] [2024-06-03 19:19:30,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:30,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:31,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:31,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010711166] [2024-06-03 19:19:31,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010711166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:31,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:31,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:19:31,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984420773] [2024-06-03 19:19:31,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:31,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:19:31,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:31,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:19:31,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:19:31,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:19:31,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 541 transitions, 6234 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:31,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:31,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:19:31,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:33,156 INFO L124 PetriNetUnfolderBase]: 4172/6855 cut-off events. [2024-06-03 19:19:33,156 INFO L125 PetriNetUnfolderBase]: For 1841748/1841756 co-relation queries the response was YES. [2024-06-03 19:19:33,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69971 conditions, 6855 events. 4172/6855 cut-off events. For 1841748/1841756 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 44899 event pairs, 851 based on Foata normal form. 7/6812 useless extension candidates. Maximal degree in co-relation 69778. Up to 6015 conditions per place. [2024-06-03 19:19:33,272 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 426 selfloop transitions, 82 changer transitions 0/555 dead transitions. [2024-06-03 19:19:33,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 555 transitions, 7430 flow [2024-06-03 19:19:33,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:33,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:33,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:19:33,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-03 19:19:33,274 INFO L175 Difference]: Start difference. First operand has 403 places, 541 transitions, 6234 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:19:33,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 555 transitions, 7430 flow [2024-06-03 19:19:37,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 555 transitions, 7212 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 19:19:37,120 INFO L231 Difference]: Finished difference. Result has 403 places, 544 transitions, 6344 flow [2024-06-03 19:19:37,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6016, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6344, PETRI_PLACES=403, PETRI_TRANSITIONS=544} [2024-06-03 19:19:37,120 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 358 predicate places. [2024-06-03 19:19:37,120 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 544 transitions, 6344 flow [2024-06-03 19:19:37,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:37,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:37,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:37,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 19:19:37,121 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:19:37,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:37,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1242687113, now seen corresponding path program 5 times [2024-06-03 19:19:37,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:37,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913995202] [2024-06-03 19:19:37,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:37,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:38,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:38,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913995202] [2024-06-03 19:19:38,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913995202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:38,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:38,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:19:38,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872164565] [2024-06-03 19:19:38,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:38,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:19:38,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:38,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:19:38,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:19:38,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:19:38,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 544 transitions, 6344 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:38,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:38,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:19:38,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:40,441 INFO L124 PetriNetUnfolderBase]: 4272/7001 cut-off events. [2024-06-03 19:19:40,441 INFO L125 PetriNetUnfolderBase]: For 1968863/1968871 co-relation queries the response was YES. [2024-06-03 19:19:40,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73887 conditions, 7001 events. 4272/7001 cut-off events. For 1968863/1968871 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 45850 event pairs, 856 based on Foata normal form. 7/6958 useless extension candidates. Maximal degree in co-relation 73693. Up to 6025 conditions per place. [2024-06-03 19:19:40,561 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 420 selfloop transitions, 106 changer transitions 0/573 dead transitions. [2024-06-03 19:19:40,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 573 transitions, 8566 flow [2024-06-03 19:19:40,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:19:40,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:19:40,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-03 19:19:40,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:19:40,562 INFO L175 Difference]: Start difference. First operand has 403 places, 544 transitions, 6344 flow. Second operand 9 states and 176 transitions. [2024-06-03 19:19:40,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 573 transitions, 8566 flow [2024-06-03 19:19:45,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 573 transitions, 8260 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-03 19:19:45,591 INFO L231 Difference]: Finished difference. Result has 408 places, 556 transitions, 6793 flow [2024-06-03 19:19:45,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6038, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6793, PETRI_PLACES=408, PETRI_TRANSITIONS=556} [2024-06-03 19:19:45,592 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 363 predicate places. [2024-06-03 19:19:45,592 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 556 transitions, 6793 flow [2024-06-03 19:19:45,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:45,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:45,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:45,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 19:19:45,592 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:19:45,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:45,593 INFO L85 PathProgramCache]: Analyzing trace with hash -769787197, now seen corresponding path program 2 times [2024-06-03 19:19:45,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:45,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389436881] [2024-06-03 19:19:45,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:45,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:47,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:47,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389436881] [2024-06-03 19:19:47,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389436881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:47,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:47,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:19:47,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756528615] [2024-06-03 19:19:47,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:47,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:19:47,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:47,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:19:47,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:19:47,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:19:47,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 556 transitions, 6793 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:47,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:47,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:19:47,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:49,566 INFO L124 PetriNetUnfolderBase]: 4285/7017 cut-off events. [2024-06-03 19:19:49,566 INFO L125 PetriNetUnfolderBase]: For 1984923/1984925 co-relation queries the response was YES. [2024-06-03 19:19:49,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75155 conditions, 7017 events. 4285/7017 cut-off events. For 1984923/1984925 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 45946 event pairs, 837 based on Foata normal form. 1/6969 useless extension candidates. Maximal degree in co-relation 74958. Up to 6422 conditions per place. [2024-06-03 19:19:49,689 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 501 selfloop transitions, 27 changer transitions 0/575 dead transitions. [2024-06-03 19:19:49,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 575 transitions, 8475 flow [2024-06-03 19:19:49,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:19:49,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:19:49,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-03 19:19:49,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39545454545454545 [2024-06-03 19:19:49,690 INFO L175 Difference]: Start difference. First operand has 408 places, 556 transitions, 6793 flow. Second operand 10 states and 174 transitions. [2024-06-03 19:19:49,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 575 transitions, 8475 flow [2024-06-03 19:19:54,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 575 transitions, 8171 flow, removed 106 selfloop flow, removed 4 redundant places. [2024-06-03 19:19:54,702 INFO L231 Difference]: Finished difference. Result has 414 places, 562 transitions, 6871 flow [2024-06-03 19:19:54,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6493, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6871, PETRI_PLACES=414, PETRI_TRANSITIONS=562} [2024-06-03 19:19:54,703 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 369 predicate places. [2024-06-03 19:19:54,703 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 562 transitions, 6871 flow [2024-06-03 19:19:54,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:54,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:54,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:54,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 19:19:54,704 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:19:54,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:54,704 INFO L85 PathProgramCache]: Analyzing trace with hash -770321947, now seen corresponding path program 3 times [2024-06-03 19:19:54,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:54,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243299086] [2024-06-03 19:19:54,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:54,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:56,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:56,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243299086] [2024-06-03 19:19:56,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243299086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:56,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:56,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:19:56,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476427809] [2024-06-03 19:19:56,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:56,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:19:56,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:56,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:19:56,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:19:56,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:19:56,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 562 transitions, 6871 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:56,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:56,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:19:56,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:58,677 INFO L124 PetriNetUnfolderBase]: 4282/7009 cut-off events. [2024-06-03 19:19:58,678 INFO L125 PetriNetUnfolderBase]: For 1999209/1999211 co-relation queries the response was YES. [2024-06-03 19:19:58,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74674 conditions, 7009 events. 4282/7009 cut-off events. For 1999209/1999211 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 45820 event pairs, 838 based on Foata normal form. 1/6961 useless extension candidates. Maximal degree in co-relation 74475. Up to 6425 conditions per place. [2024-06-03 19:19:58,808 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 505 selfloop transitions, 21 changer transitions 0/573 dead transitions. [2024-06-03 19:19:58,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 573 transitions, 7951 flow [2024-06-03 19:19:58,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:19:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:19:58,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:19:58,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39646464646464646 [2024-06-03 19:19:58,809 INFO L175 Difference]: Start difference. First operand has 414 places, 562 transitions, 6871 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:19:58,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 573 transitions, 7951 flow [2024-06-03 19:20:03,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 573 transitions, 7626 flow, removed 149 selfloop flow, removed 7 redundant places. [2024-06-03 19:20:03,938 INFO L231 Difference]: Finished difference. Result has 416 places, 562 transitions, 6594 flow [2024-06-03 19:20:03,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6546, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6594, PETRI_PLACES=416, PETRI_TRANSITIONS=562} [2024-06-03 19:20:03,938 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 371 predicate places. [2024-06-03 19:20:03,938 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 562 transitions, 6594 flow [2024-06-03 19:20:03,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:03,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:03,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:03,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 19:20:03,939 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:20:03,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:03,939 INFO L85 PathProgramCache]: Analyzing trace with hash -785991083, now seen corresponding path program 6 times [2024-06-03 19:20:03,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:03,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272699317] [2024-06-03 19:20:03,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:03,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:05,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:05,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272699317] [2024-06-03 19:20:05,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272699317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:05,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:05,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:20:05,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095008676] [2024-06-03 19:20:05,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:05,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:20:05,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:05,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:20:05,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:20:05,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:20:05,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 562 transitions, 6594 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:05,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:05,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:20:05,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:07,394 INFO L124 PetriNetUnfolderBase]: 4316/7068 cut-off events. [2024-06-03 19:20:07,394 INFO L125 PetriNetUnfolderBase]: For 2078824/2078828 co-relation queries the response was YES. [2024-06-03 19:20:07,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75643 conditions, 7068 events. 4316/7068 cut-off events. For 2078824/2078828 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 46361 event pairs, 849 based on Foata normal form. 6/7024 useless extension candidates. Maximal degree in co-relation 75443. Up to 5733 conditions per place. [2024-06-03 19:20:07,542 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 376 selfloop transitions, 172 changer transitions 0/595 dead transitions. [2024-06-03 19:20:07,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 595 transitions, 9293 flow [2024-06-03 19:20:07,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:20:07,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:20:07,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-03 19:20:07,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-03 19:20:07,543 INFO L175 Difference]: Start difference. First operand has 416 places, 562 transitions, 6594 flow. Second operand 9 states and 180 transitions. [2024-06-03 19:20:07,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 595 transitions, 9293 flow [2024-06-03 19:20:11,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 595 transitions, 9249 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 19:20:11,990 INFO L231 Difference]: Finished difference. Result has 420 places, 574 transitions, 7482 flow [2024-06-03 19:20:11,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6550, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7482, PETRI_PLACES=420, PETRI_TRANSITIONS=574} [2024-06-03 19:20:11,990 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 375 predicate places. [2024-06-03 19:20:11,990 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 574 transitions, 7482 flow [2024-06-03 19:20:11,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:11,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:11,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:11,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 19:20:11,991 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:20:11,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:11,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1242673163, now seen corresponding path program 7 times [2024-06-03 19:20:11,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:11,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122691916] [2024-06-03 19:20:11,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:11,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:13,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:13,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122691916] [2024-06-03 19:20:13,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122691916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:13,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:13,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:20:13,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234691141] [2024-06-03 19:20:13,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:13,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:20:13,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:13,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:20:13,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:20:13,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:20:13,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 574 transitions, 7482 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:13,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:13,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:20:13,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:15,382 INFO L124 PetriNetUnfolderBase]: 4308/7057 cut-off events. [2024-06-03 19:20:15,382 INFO L125 PetriNetUnfolderBase]: For 2077533/2077541 co-relation queries the response was YES. [2024-06-03 19:20:15,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76475 conditions, 7057 events. 4308/7057 cut-off events. For 2077533/2077541 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 46282 event pairs, 861 based on Foata normal form. 7/7014 useless extension candidates. Maximal degree in co-relation 76272. Up to 6086 conditions per place. [2024-06-03 19:20:15,506 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 437 selfloop transitions, 105 changer transitions 0/589 dead transitions. [2024-06-03 19:20:15,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 589 transitions, 8984 flow [2024-06-03 19:20:15,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:20:15,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:20:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 19:20:15,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-03 19:20:15,508 INFO L175 Difference]: Start difference. First operand has 420 places, 574 transitions, 7482 flow. Second operand 9 states and 173 transitions. [2024-06-03 19:20:15,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 589 transitions, 8984 flow [2024-06-03 19:20:20,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 589 transitions, 8312 flow, removed 184 selfloop flow, removed 6 redundant places. [2024-06-03 19:20:20,939 INFO L231 Difference]: Finished difference. Result has 423 places, 574 transitions, 7029 flow [2024-06-03 19:20:20,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6810, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7029, PETRI_PLACES=423, PETRI_TRANSITIONS=574} [2024-06-03 19:20:20,940 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 378 predicate places. [2024-06-03 19:20:20,940 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 574 transitions, 7029 flow [2024-06-03 19:20:20,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:20,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:20,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:20,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 19:20:20,941 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:20:20,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:20,941 INFO L85 PathProgramCache]: Analyzing trace with hash -785976637, now seen corresponding path program 4 times [2024-06-03 19:20:20,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:20,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175250359] [2024-06-03 19:20:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:20,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:22,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:22,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175250359] [2024-06-03 19:20:22,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175250359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:22,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:22,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:20:22,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458214670] [2024-06-03 19:20:22,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:22,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:20:22,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:22,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:20:22,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:20:22,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:20:22,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 574 transitions, 7029 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:22,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:22,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:20:22,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:24,827 INFO L124 PetriNetUnfolderBase]: 4305/7057 cut-off events. [2024-06-03 19:20:24,827 INFO L125 PetriNetUnfolderBase]: For 2051834/2051848 co-relation queries the response was YES. [2024-06-03 19:20:24,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74370 conditions, 7057 events. 4305/7057 cut-off events. For 2051834/2051848 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 46268 event pairs, 810 based on Foata normal form. 15/7023 useless extension candidates. Maximal degree in co-relation 74167. Up to 6411 conditions per place. [2024-06-03 19:20:24,958 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 497 selfloop transitions, 46 changer transitions 0/590 dead transitions. [2024-06-03 19:20:24,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 590 transitions, 8317 flow [2024-06-03 19:20:24,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:20:24,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:20:24,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 19:20:24,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-03 19:20:24,959 INFO L175 Difference]: Start difference. First operand has 423 places, 574 transitions, 7029 flow. Second operand 9 states and 162 transitions. [2024-06-03 19:20:24,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 590 transitions, 8317 flow [2024-06-03 19:20:30,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 590 transitions, 8079 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 19:20:30,057 INFO L231 Difference]: Finished difference. Result has 424 places, 577 transitions, 7054 flow [2024-06-03 19:20:30,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6791, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7054, PETRI_PLACES=424, PETRI_TRANSITIONS=577} [2024-06-03 19:20:30,058 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 379 predicate places. [2024-06-03 19:20:30,058 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 577 transitions, 7054 flow [2024-06-03 19:20:30,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:30,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:30,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:30,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 19:20:30,059 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:20:30,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:30,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1139667273, now seen corresponding path program 8 times [2024-06-03 19:20:30,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:30,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856624662] [2024-06-03 19:20:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:30,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:31,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:31,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:31,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856624662] [2024-06-03 19:20:31,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856624662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:31,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:31,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:20:31,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106455825] [2024-06-03 19:20:31,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:31,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:20:31,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:31,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:20:31,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:20:31,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:20:31,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 577 transitions, 7054 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:31,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:31,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:20:31,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:33,608 INFO L124 PetriNetUnfolderBase]: 4307/7058 cut-off events. [2024-06-03 19:20:33,608 INFO L125 PetriNetUnfolderBase]: For 2074389/2074397 co-relation queries the response was YES. [2024-06-03 19:20:33,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74140 conditions, 7058 events. 4307/7058 cut-off events. For 2074389/2074397 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 46295 event pairs, 860 based on Foata normal form. 5/7013 useless extension candidates. Maximal degree in co-relation 73937. Up to 6206 conditions per place. [2024-06-03 19:20:33,734 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 458 selfloop transitions, 87 changer transitions 0/592 dead transitions. [2024-06-03 19:20:33,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 592 transitions, 8322 flow [2024-06-03 19:20:33,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:20:33,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:20:33,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 19:20:33,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-03 19:20:33,735 INFO L175 Difference]: Start difference. First operand has 424 places, 577 transitions, 7054 flow. Second operand 9 states and 168 transitions. [2024-06-03 19:20:33,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 592 transitions, 8322 flow [2024-06-03 19:20:38,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 592 transitions, 8088 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-03 19:20:38,679 INFO L231 Difference]: Finished difference. Result has 426 places, 581 transitions, 7159 flow [2024-06-03 19:20:38,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6820, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7159, PETRI_PLACES=426, PETRI_TRANSITIONS=581} [2024-06-03 19:20:38,679 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 381 predicate places. [2024-06-03 19:20:38,680 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 581 transitions, 7159 flow [2024-06-03 19:20:38,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:38,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:38,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:38,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 19:20:38,680 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:20:38,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:38,680 INFO L85 PathProgramCache]: Analyzing trace with hash -666898983, now seen corresponding path program 9 times [2024-06-03 19:20:38,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:38,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039259582] [2024-06-03 19:20:38,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:38,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:40,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:40,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039259582] [2024-06-03 19:20:40,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039259582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:40,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:40,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:20:40,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663105929] [2024-06-03 19:20:40,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:40,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:20:40,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:40,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:20:40,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:20:40,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:20:40,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 581 transitions, 7159 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:40,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:40,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:20:40,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:42,502 INFO L124 PetriNetUnfolderBase]: 4335/7097 cut-off events. [2024-06-03 19:20:42,503 INFO L125 PetriNetUnfolderBase]: For 2117216/2117220 co-relation queries the response was YES. [2024-06-03 19:20:42,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75428 conditions, 7097 events. 4335/7097 cut-off events. For 2117216/2117220 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 46572 event pairs, 836 based on Foata normal form. 4/7052 useless extension candidates. Maximal degree in co-relation 75224. Up to 6450 conditions per place. [2024-06-03 19:20:42,638 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 513 selfloop transitions, 47 changer transitions 0/607 dead transitions. [2024-06-03 19:20:42,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 607 transitions, 8934 flow [2024-06-03 19:20:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:20:42,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:20:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:20:42,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 19:20:42,639 INFO L175 Difference]: Start difference. First operand has 426 places, 581 transitions, 7159 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:20:42,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 607 transitions, 8934 flow [2024-06-03 19:20:46,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 607 transitions, 8631 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-03 19:20:46,878 INFO L231 Difference]: Finished difference. Result has 430 places, 595 transitions, 7342 flow [2024-06-03 19:20:46,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6856, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7342, PETRI_PLACES=430, PETRI_TRANSITIONS=595} [2024-06-03 19:20:46,879 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 385 predicate places. [2024-06-03 19:20:46,879 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 595 transitions, 7342 flow [2024-06-03 19:20:46,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:46,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:46,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:46,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 19:20:46,879 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:20:46,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:46,880 INFO L85 PathProgramCache]: Analyzing trace with hash -785977133, now seen corresponding path program 10 times [2024-06-03 19:20:46,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:46,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260079653] [2024-06-03 19:20:46,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:46,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:48,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:48,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260079653] [2024-06-03 19:20:48,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260079653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:48,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:48,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:20:48,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090825804] [2024-06-03 19:20:48,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:48,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:20:48,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:48,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:20:48,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:20:48,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:20:48,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 595 transitions, 7342 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:48,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:48,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:20:48,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:50,247 INFO L124 PetriNetUnfolderBase]: 4357/7134 cut-off events. [2024-06-03 19:20:50,247 INFO L125 PetriNetUnfolderBase]: For 2167614/2167618 co-relation queries the response was YES. [2024-06-03 19:20:50,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76112 conditions, 7134 events. 4357/7134 cut-off events. For 2167614/2167618 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 46934 event pairs, 850 based on Foata normal form. 6/7090 useless extension candidates. Maximal degree in co-relation 75905. Up to 5776 conditions per place. [2024-06-03 19:20:50,376 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 389 selfloop transitions, 185 changer transitions 0/621 dead transitions. [2024-06-03 19:20:50,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 621 transitions, 9838 flow [2024-06-03 19:20:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:20:50,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:20:50,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-03 19:20:50,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-03 19:20:50,377 INFO L175 Difference]: Start difference. First operand has 430 places, 595 transitions, 7342 flow. Second operand 9 states and 180 transitions. [2024-06-03 19:20:50,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 621 transitions, 9838 flow [2024-06-03 19:20:55,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 621 transitions, 9463 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-03 19:20:55,649 INFO L231 Difference]: Finished difference. Result has 434 places, 603 transitions, 7673 flow [2024-06-03 19:20:55,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6967, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7673, PETRI_PLACES=434, PETRI_TRANSITIONS=603} [2024-06-03 19:20:55,650 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 389 predicate places. [2024-06-03 19:20:55,650 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 603 transitions, 7673 flow [2024-06-03 19:20:55,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:55,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:55,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:55,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 19:20:55,651 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:20:55,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:55,651 INFO L85 PathProgramCache]: Analyzing trace with hash -785194257, now seen corresponding path program 1 times [2024-06-03 19:20:55,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:55,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555288907] [2024-06-03 19:20:55,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:55,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:57,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:57,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555288907] [2024-06-03 19:20:57,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555288907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:57,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:57,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:20:57,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023202553] [2024-06-03 19:20:57,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:57,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:20:57,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:57,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:20:57,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:20:57,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:20:57,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 603 transitions, 7673 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:57,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:57,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:20:57,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:59,381 INFO L124 PetriNetUnfolderBase]: 4368/7183 cut-off events. [2024-06-03 19:20:59,381 INFO L125 PetriNetUnfolderBase]: For 2167982/2167984 co-relation queries the response was YES. [2024-06-03 19:20:59,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76274 conditions, 7183 events. 4368/7183 cut-off events. For 2167982/2167984 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 47313 event pairs, 843 based on Foata normal form. 1/7183 useless extension candidates. Maximal degree in co-relation 76066. Up to 6587 conditions per place. [2024-06-03 19:20:59,515 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 577 selfloop transitions, 21 changer transitions 0/629 dead transitions. [2024-06-03 19:20:59,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 629 transitions, 9045 flow [2024-06-03 19:20:59,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:20:59,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:20:59,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:20:59,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-03 19:20:59,517 INFO L175 Difference]: Start difference. First operand has 434 places, 603 transitions, 7673 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:20:59,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 629 transitions, 9045 flow [2024-06-03 19:21:06,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 629 transitions, 8590 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-03 19:21:06,480 INFO L231 Difference]: Finished difference. Result has 438 places, 606 transitions, 7380 flow [2024-06-03 19:21:06,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7218, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7380, PETRI_PLACES=438, PETRI_TRANSITIONS=606} [2024-06-03 19:21:06,481 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 393 predicate places. [2024-06-03 19:21:06,481 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 606 transitions, 7380 flow [2024-06-03 19:21:06,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:06,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:06,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:06,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 19:21:06,481 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:06,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:06,482 INFO L85 PathProgramCache]: Analyzing trace with hash -470565045, now seen corresponding path program 1 times [2024-06-03 19:21:06,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:06,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329799595] [2024-06-03 19:21:06,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:06,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:07,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:07,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329799595] [2024-06-03 19:21:07,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329799595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:07,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:07,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:07,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602239802] [2024-06-03 19:21:07,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:07,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:07,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:07,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:07,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:08,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:21:08,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 606 transitions, 7380 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:08,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:08,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:21:08,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:10,420 INFO L124 PetriNetUnfolderBase]: 4386/7208 cut-off events. [2024-06-03 19:21:10,421 INFO L125 PetriNetUnfolderBase]: For 2257700/2257708 co-relation queries the response was YES. [2024-06-03 19:21:10,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76263 conditions, 7208 events. 4386/7208 cut-off events. For 2257700/2257708 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 47552 event pairs, 843 based on Foata normal form. 6/7212 useless extension candidates. Maximal degree in co-relation 76054. Up to 6607 conditions per place. [2024-06-03 19:21:10,538 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 579 selfloop transitions, 22 changer transitions 0/632 dead transitions. [2024-06-03 19:21:10,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 632 transitions, 8754 flow [2024-06-03 19:21:10,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:10,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:10,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:21:10,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-03 19:21:10,539 INFO L175 Difference]: Start difference. First operand has 438 places, 606 transitions, 7380 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:21:10,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 632 transitions, 8754 flow [2024-06-03 19:21:16,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 632 transitions, 8614 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-03 19:21:16,588 INFO L231 Difference]: Finished difference. Result has 440 places, 610 transitions, 7393 flow [2024-06-03 19:21:16,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7240, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7393, PETRI_PLACES=440, PETRI_TRANSITIONS=610} [2024-06-03 19:21:16,588 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 395 predicate places. [2024-06-03 19:21:16,588 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 610 transitions, 7393 flow [2024-06-03 19:21:16,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:16,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:16,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:16,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 19:21:16,589 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:16,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:16,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1024661899, now seen corresponding path program 2 times [2024-06-03 19:21:16,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:16,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791521702] [2024-06-03 19:21:16,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:16,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:18,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:18,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791521702] [2024-06-03 19:21:18,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791521702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:18,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:18,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:18,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635136649] [2024-06-03 19:21:18,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:18,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:18,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:18,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:18,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:18,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:21:18,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 610 transitions, 7393 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:18,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:18,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:21:18,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:20,376 INFO L124 PetriNetUnfolderBase]: 4434/7278 cut-off events. [2024-06-03 19:21:20,376 INFO L125 PetriNetUnfolderBase]: For 2326178/2326192 co-relation queries the response was YES. [2024-06-03 19:21:20,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78806 conditions, 7278 events. 4434/7278 cut-off events. For 2326178/2326192 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 47961 event pairs, 847 based on Foata normal form. 2/7278 useless extension candidates. Maximal degree in co-relation 78596. Up to 6628 conditions per place. [2024-06-03 19:21:20,806 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 570 selfloop transitions, 38 changer transitions 0/639 dead transitions. [2024-06-03 19:21:20,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 639 transitions, 9188 flow [2024-06-03 19:21:20,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:20,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:20,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:21:20,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-03 19:21:20,807 INFO L175 Difference]: Start difference. First operand has 440 places, 610 transitions, 7393 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:21:20,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 639 transitions, 9188 flow [2024-06-03 19:21:27,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 639 transitions, 9065 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-03 19:21:27,384 INFO L231 Difference]: Finished difference. Result has 443 places, 617 transitions, 7565 flow [2024-06-03 19:21:27,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7270, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7565, PETRI_PLACES=443, PETRI_TRANSITIONS=617} [2024-06-03 19:21:27,384 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 398 predicate places. [2024-06-03 19:21:27,385 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 617 transitions, 7565 flow [2024-06-03 19:21:27,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:27,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:27,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:27,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 19:21:27,385 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:27,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:27,386 INFO L85 PathProgramCache]: Analyzing trace with hash -465923415, now seen corresponding path program 3 times [2024-06-03 19:21:27,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:27,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780801558] [2024-06-03 19:21:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:27,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:28,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:28,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:28,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780801558] [2024-06-03 19:21:28,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780801558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:28,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:28,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:28,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096491648] [2024-06-03 19:21:28,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:28,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:28,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:28,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:28,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:28,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:21:28,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 617 transitions, 7565 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:28,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:28,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:21:28,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:30,909 INFO L124 PetriNetUnfolderBase]: 4416/7254 cut-off events. [2024-06-03 19:21:30,910 INFO L125 PetriNetUnfolderBase]: For 2327598/2327606 co-relation queries the response was YES. [2024-06-03 19:21:31,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78589 conditions, 7254 events. 4416/7254 cut-off events. For 2327598/2327606 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 47809 event pairs, 843 based on Foata normal form. 6/7258 useless extension candidates. Maximal degree in co-relation 78377. Up to 6640 conditions per place. [2024-06-03 19:21:31,045 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 579 selfloop transitions, 27 changer transitions 0/637 dead transitions. [2024-06-03 19:21:31,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 637 transitions, 8861 flow [2024-06-03 19:21:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:31,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:31,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:21:31,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-03 19:21:31,046 INFO L175 Difference]: Start difference. First operand has 443 places, 617 transitions, 7565 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:21:31,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 637 transitions, 8861 flow [2024-06-03 19:21:36,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 637 transitions, 8682 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-03 19:21:36,022 INFO L231 Difference]: Finished difference. Result has 447 places, 617 transitions, 7447 flow [2024-06-03 19:21:36,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7386, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7447, PETRI_PLACES=447, PETRI_TRANSITIONS=617} [2024-06-03 19:21:36,022 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 402 predicate places. [2024-06-03 19:21:36,022 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 617 transitions, 7447 flow [2024-06-03 19:21:36,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:36,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:36,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:36,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 19:21:36,023 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:36,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:36,024 INFO L85 PathProgramCache]: Analyzing trace with hash -293196375, now seen corresponding path program 4 times [2024-06-03 19:21:36,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:36,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937671756] [2024-06-03 19:21:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:36,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:37,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:37,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937671756] [2024-06-03 19:21:37,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937671756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:37,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:37,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:37,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550689586] [2024-06-03 19:21:37,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:37,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:37,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:37,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:37,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:37,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:21:37,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 617 transitions, 7447 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:37,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:37,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:21:37,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:40,135 INFO L124 PetriNetUnfolderBase]: 4466/7327 cut-off events. [2024-06-03 19:21:40,136 INFO L125 PetriNetUnfolderBase]: For 2391749/2391763 co-relation queries the response was YES. [2024-06-03 19:21:40,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80377 conditions, 7327 events. 4466/7327 cut-off events. For 2391749/2391763 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 48333 event pairs, 849 based on Foata normal form. 2/7327 useless extension candidates. Maximal degree in co-relation 80163. Up to 6613 conditions per place. [2024-06-03 19:21:40,261 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 548 selfloop transitions, 64 changer transitions 0/643 dead transitions. [2024-06-03 19:21:40,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 643 transitions, 9563 flow [2024-06-03 19:21:40,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:40,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:40,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 19:21:40,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-03 19:21:40,262 INFO L175 Difference]: Start difference. First operand has 447 places, 617 transitions, 7447 flow. Second operand 9 states and 173 transitions. [2024-06-03 19:21:40,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 643 transitions, 9563 flow [2024-06-03 19:21:47,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 643 transitions, 9482 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-03 19:21:47,654 INFO L231 Difference]: Finished difference. Result has 449 places, 624 transitions, 7749 flow [2024-06-03 19:21:47,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7366, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7749, PETRI_PLACES=449, PETRI_TRANSITIONS=624} [2024-06-03 19:21:47,655 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 404 predicate places. [2024-06-03 19:21:47,655 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 624 transitions, 7749 flow [2024-06-03 19:21:47,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:47,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:47,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:47,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 19:21:47,655 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:47,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:47,655 INFO L85 PathProgramCache]: Analyzing trace with hash -293433525, now seen corresponding path program 5 times [2024-06-03 19:21:47,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:47,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717375263] [2024-06-03 19:21:47,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:47,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:49,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:49,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717375263] [2024-06-03 19:21:49,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717375263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:49,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:49,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:49,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222517232] [2024-06-03 19:21:49,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:49,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:49,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:49,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:49,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:49,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:21:49,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 624 transitions, 7749 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:49,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:49,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:21:49,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:52,212 INFO L124 PetriNetUnfolderBase]: 4465/7327 cut-off events. [2024-06-03 19:21:52,212 INFO L125 PetriNetUnfolderBase]: For 2431103/2431117 co-relation queries the response was YES. [2024-06-03 19:21:52,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81228 conditions, 7327 events. 4465/7327 cut-off events. For 2431103/2431117 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 48323 event pairs, 847 based on Foata normal form. 6/7330 useless extension candidates. Maximal degree in co-relation 81012. Up to 6696 conditions per place. [2024-06-03 19:21:52,335 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 579 selfloop transitions, 34 changer transitions 0/644 dead transitions. [2024-06-03 19:21:52,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 644 transitions, 9158 flow [2024-06-03 19:21:52,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:52,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:52,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 19:21:52,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-03 19:21:52,337 INFO L175 Difference]: Start difference. First operand has 449 places, 624 transitions, 7749 flow. Second operand 9 states and 168 transitions. [2024-06-03 19:21:52,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 644 transitions, 9158 flow [2024-06-03 19:21:58,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 644 transitions, 8946 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-03 19:21:58,560 INFO L231 Difference]: Finished difference. Result has 452 places, 627 transitions, 7719 flow [2024-06-03 19:21:58,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7541, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7719, PETRI_PLACES=452, PETRI_TRANSITIONS=627} [2024-06-03 19:21:58,561 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 407 predicate places. [2024-06-03 19:21:58,561 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 627 transitions, 7719 flow [2024-06-03 19:21:58,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:58,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:58,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:58,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 19:21:58,561 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:58,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:58,561 INFO L85 PathProgramCache]: Analyzing trace with hash -427177421, now seen corresponding path program 6 times [2024-06-03 19:21:58,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:58,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520705854] [2024-06-03 19:21:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:58,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:59,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:59,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520705854] [2024-06-03 19:21:59,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520705854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:59,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:59,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:59,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207266473] [2024-06-03 19:21:59,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:59,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:59,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:59,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:59,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:59,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:21:59,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 627 transitions, 7719 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:59,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:59,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:21:59,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:02,869 INFO L124 PetriNetUnfolderBase]: 4461/7321 cut-off events. [2024-06-03 19:22:02,869 INFO L125 PetriNetUnfolderBase]: For 2389119/2389133 co-relation queries the response was YES. [2024-06-03 19:22:02,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80738 conditions, 7321 events. 4461/7321 cut-off events. For 2389119/2389133 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 48313 event pairs, 845 based on Foata normal form. 1/7320 useless extension candidates. Maximal degree in co-relation 80521. Up to 6691 conditions per place. [2024-06-03 19:22:02,991 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 581 selfloop transitions, 39 changer transitions 0/651 dead transitions. [2024-06-03 19:22:02,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 651 transitions, 9234 flow [2024-06-03 19:22:02,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:22:02,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:22:02,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:22:02,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-03 19:22:02,992 INFO L175 Difference]: Start difference. First operand has 452 places, 627 transitions, 7719 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:22:02,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 651 transitions, 9234 flow [2024-06-03 19:22:10,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 651 transitions, 8992 flow, removed 88 selfloop flow, removed 7 redundant places. [2024-06-03 19:22:10,315 INFO L231 Difference]: Finished difference. Result has 455 places, 635 transitions, 7797 flow [2024-06-03 19:22:10,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7556, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7797, PETRI_PLACES=455, PETRI_TRANSITIONS=635} [2024-06-03 19:22:10,316 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 410 predicate places. [2024-06-03 19:22:10,316 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 635 transitions, 7797 flow [2024-06-03 19:22:10,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:10,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:10,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:10,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 19:22:10,316 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:22:10,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:10,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1065365563, now seen corresponding path program 7 times [2024-06-03 19:22:10,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:10,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960505412] [2024-06-03 19:22:10,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:10,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:11,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:11,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960505412] [2024-06-03 19:22:11,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960505412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:11,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:11,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:22:11,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255150466] [2024-06-03 19:22:11,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:11,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:22:11,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:11,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:22:11,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:22:11,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:22:11,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 635 transitions, 7797 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:11,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:11,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:22:11,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:14,624 INFO L124 PetriNetUnfolderBase]: 4509/7393 cut-off events. [2024-06-03 19:22:14,624 INFO L125 PetriNetUnfolderBase]: For 2499556/2499572 co-relation queries the response was YES. [2024-06-03 19:22:14,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82165 conditions, 7393 events. 4509/7393 cut-off events. For 2499556/2499572 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 48763 event pairs, 861 based on Foata normal form. 2/7393 useless extension candidates. Maximal degree in co-relation 81946. Up to 6696 conditions per place. [2024-06-03 19:22:14,751 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 572 selfloop transitions, 57 changer transitions 0/660 dead transitions. [2024-06-03 19:22:14,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 660 transitions, 9688 flow [2024-06-03 19:22:14,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:22:14,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:22:14,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 19:22:14,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-03 19:22:14,752 INFO L175 Difference]: Start difference. First operand has 455 places, 635 transitions, 7797 flow. Second operand 9 states and 174 transitions. [2024-06-03 19:22:14,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 660 transitions, 9688 flow [2024-06-03 19:22:22,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 660 transitions, 9563 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-03 19:22:22,672 INFO L231 Difference]: Finished difference. Result has 460 places, 642 transitions, 8027 flow [2024-06-03 19:22:22,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7672, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8027, PETRI_PLACES=460, PETRI_TRANSITIONS=642} [2024-06-03 19:22:22,672 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 415 predicate places. [2024-06-03 19:22:22,673 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 642 transitions, 8027 flow [2024-06-03 19:22:22,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:22,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:22,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:22,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 19:22:22,673 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:22:22,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:22,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1065602713, now seen corresponding path program 8 times [2024-06-03 19:22:22,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:22,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417063158] [2024-06-03 19:22:22,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:22,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:24,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:24,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417063158] [2024-06-03 19:22:24,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417063158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:24,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:24,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:22:24,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941664357] [2024-06-03 19:22:24,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:24,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:22:24,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:24,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:22:24,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:22:24,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:22:24,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 642 transitions, 8027 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:24,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:24,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:22:24,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:26,955 INFO L124 PetriNetUnfolderBase]: 4516/7403 cut-off events. [2024-06-03 19:22:26,955 INFO L125 PetriNetUnfolderBase]: For 2539490/2539506 co-relation queries the response was YES. [2024-06-03 19:22:27,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83048 conditions, 7403 events. 4516/7403 cut-off events. For 2539490/2539506 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 48840 event pairs, 859 based on Foata normal form. 6/7406 useless extension candidates. Maximal degree in co-relation 82826. Up to 6751 conditions per place. [2024-06-03 19:22:27,089 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 585 selfloop transitions, 43 changer transitions 0/659 dead transitions. [2024-06-03 19:22:27,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 659 transitions, 9464 flow [2024-06-03 19:22:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:22:27,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:22:27,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:22:27,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-03 19:22:27,090 INFO L175 Difference]: Start difference. First operand has 460 places, 642 transitions, 8027 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:22:27,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 659 transitions, 9464 flow [2024-06-03 19:22:33,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 659 transitions, 9305 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-03 19:22:33,647 INFO L231 Difference]: Finished difference. Result has 464 places, 645 transitions, 8070 flow [2024-06-03 19:22:33,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7878, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8070, PETRI_PLACES=464, PETRI_TRANSITIONS=645} [2024-06-03 19:22:33,647 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 419 predicate places. [2024-06-03 19:22:33,647 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 645 transitions, 8070 flow [2024-06-03 19:22:33,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:33,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:33,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:33,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 19:22:33,648 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:22:33,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:33,649 INFO L85 PathProgramCache]: Analyzing trace with hash -780265693, now seen corresponding path program 9 times [2024-06-03 19:22:33,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:33,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424413930] [2024-06-03 19:22:33,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:33,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:35,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:35,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424413930] [2024-06-03 19:22:35,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424413930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:35,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:35,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:22:35,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992391914] [2024-06-03 19:22:35,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:35,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:22:35,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:35,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:22:35,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:22:35,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:22:35,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 645 transitions, 8070 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:35,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:35,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:22:35,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:37,886 INFO L124 PetriNetUnfolderBase]: 4532/7429 cut-off events. [2024-06-03 19:22:37,887 INFO L125 PetriNetUnfolderBase]: For 2548563/2548585 co-relation queries the response was YES. [2024-06-03 19:22:37,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83627 conditions, 7429 events. 4532/7429 cut-off events. For 2548563/2548585 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 48961 event pairs, 859 based on Foata normal form. 2/7428 useless extension candidates. Maximal degree in co-relation 83403. Up to 6578 conditions per place. [2024-06-03 19:22:38,032 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 515 selfloop transitions, 122 changer transitions 0/668 dead transitions. [2024-06-03 19:22:38,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 668 transitions, 9975 flow [2024-06-03 19:22:38,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:22:38,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:22:38,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 19:22:38,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-03 19:22:38,033 INFO L175 Difference]: Start difference. First operand has 464 places, 645 transitions, 8070 flow. Second operand 9 states and 174 transitions. [2024-06-03 19:22:38,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 668 transitions, 9975 flow [2024-06-03 19:22:44,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 668 transitions, 9804 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-03 19:22:44,875 INFO L231 Difference]: Finished difference. Result has 467 places, 651 transitions, 8446 flow [2024-06-03 19:22:44,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7899, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8446, PETRI_PLACES=467, PETRI_TRANSITIONS=651} [2024-06-03 19:22:44,875 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 422 predicate places. [2024-06-03 19:22:44,875 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 651 transitions, 8446 flow [2024-06-03 19:22:44,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:44,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:44,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:44,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 19:22:44,876 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:22:44,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:44,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1065596203, now seen corresponding path program 10 times [2024-06-03 19:22:44,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:44,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506103195] [2024-06-03 19:22:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:44,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:46,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:46,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506103195] [2024-06-03 19:22:46,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506103195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:46,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:46,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:22:46,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680224352] [2024-06-03 19:22:46,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:46,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:22:46,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:46,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:22:46,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:22:46,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:22:46,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 651 transitions, 8446 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:46,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:46,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:22:46,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:49,221 INFO L124 PetriNetUnfolderBase]: 4536/7435 cut-off events. [2024-06-03 19:22:49,221 INFO L125 PetriNetUnfolderBase]: For 2547720/2547736 co-relation queries the response was YES. [2024-06-03 19:22:49,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84289 conditions, 7435 events. 4536/7435 cut-off events. For 2547720/2547736 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 49069 event pairs, 857 based on Foata normal form. 2/7435 useless extension candidates. Maximal degree in co-relation 84063. Up to 6762 conditions per place. [2024-06-03 19:22:49,356 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 586 selfloop transitions, 50 changer transitions 0/667 dead transitions. [2024-06-03 19:22:49,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 667 transitions, 10134 flow [2024-06-03 19:22:49,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:22:49,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:22:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:22:49,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-03 19:22:49,357 INFO L175 Difference]: Start difference. First operand has 467 places, 651 transitions, 8446 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:22:49,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 667 transitions, 10134 flow [2024-06-03 19:22:57,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 667 transitions, 9967 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-03 19:22:57,113 INFO L231 Difference]: Finished difference. Result has 471 places, 651 transitions, 8386 flow [2024-06-03 19:22:57,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8279, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8386, PETRI_PLACES=471, PETRI_TRANSITIONS=651} [2024-06-03 19:22:57,114 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 426 predicate places. [2024-06-03 19:22:57,114 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 651 transitions, 8386 flow [2024-06-03 19:22:57,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:57,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:57,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:57,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 19:22:57,114 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:22:57,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:57,115 INFO L85 PathProgramCache]: Analyzing trace with hash 2026418659, now seen corresponding path program 1 times [2024-06-03 19:22:57,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:57,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961308547] [2024-06-03 19:22:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:57,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:58,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:58,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961308547] [2024-06-03 19:22:58,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961308547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:58,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:58,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:22:58,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609555636] [2024-06-03 19:22:58,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:58,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:22:58,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:58,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:22:58,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:22:58,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:22:58,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 651 transitions, 8386 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:58,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:58,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:22:58,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:01,123 INFO L124 PetriNetUnfolderBase]: 4569/7434 cut-off events. [2024-06-03 19:23:01,123 INFO L125 PetriNetUnfolderBase]: For 2576150/2576168 co-relation queries the response was YES. [2024-06-03 19:23:01,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84705 conditions, 7434 events. 4569/7434 cut-off events. For 2576150/2576168 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 48637 event pairs, 671 based on Foata normal form. 14/7396 useless extension candidates. Maximal degree in co-relation 84477. Up to 6596 conditions per place. [2024-06-03 19:23:01,255 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 582 selfloop transitions, 54 changer transitions 0/683 dead transitions. [2024-06-03 19:23:01,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 683 transitions, 9887 flow [2024-06-03 19:23:01,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:23:01,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:23:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-03 19:23:01,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-03 19:23:01,256 INFO L175 Difference]: Start difference. First operand has 471 places, 651 transitions, 8386 flow. Second operand 9 states and 179 transitions. [2024-06-03 19:23:01,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 683 transitions, 9887 flow [2024-06-03 19:23:07,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 683 transitions, 9701 flow, removed 41 selfloop flow, removed 7 redundant places.