./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 cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/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-cde23df-m [2024-06-14 11:55:32,728 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:55:32,797 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:55:32,801 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:55:32,802 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:55:32,825 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:55:32,825 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:55:32,826 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:55:32,826 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:55:32,827 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:55:32,827 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:55:32,828 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:55:32,828 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:55:32,828 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:55:32,829 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:55:32,829 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:55:32,829 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:55:32,829 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:55:32,830 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:55:32,830 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:55:32,830 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:55:32,830 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:55:32,831 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:55:32,831 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:55:32,831 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:55:32,831 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:55:32,832 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:55:32,832 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:55:32,832 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:55:32,832 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:55:32,833 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:55:32,833 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:55:32,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:55:32,833 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:55:32,833 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:55:32,834 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:55:32,834 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:55:32,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:55:32,834 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:55:32,834 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:55:32,834 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:55:32,835 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:55:32,835 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:55:32,835 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:55:32,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:55:33,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:55:33,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:55:33,004 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:55:33,004 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:55:33,005 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix011.opt.i [2024-06-14 11:55:34,063 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:55:34,301 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:55:34,316 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix011.opt.i [2024-06-14 11:55:34,328 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfd732810/c48e98f957af4dc1be783f94393df11c/FLAGe2ec37a01 [2024-06-14 11:55:34,341 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfd732810/c48e98f957af4dc1be783f94393df11c [2024-06-14 11:55:34,343 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:55:34,344 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:55:34,344 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix011.opt.yml/witness.yml [2024-06-14 11:55:34,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:55:34,500 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:55:34,501 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:55:34,502 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:55:34,505 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:55:34,506 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:55:34" (1/2) ... [2024-06-14 11:55:34,506 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@362b9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:55:34, skipping insertion in model container [2024-06-14 11:55:34,507 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:55:34" (1/2) ... [2024-06-14 11:55:34,508 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2fdc8991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:55:34, skipping insertion in model container [2024-06-14 11:55:34,508 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:55:34" (2/2) ... [2024-06-14 11:55:34,508 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@362b9ce and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:55:34, skipping insertion in model container [2024-06-14 11:55:34,508 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:55:34" (2/2) ... [2024-06-14 11:55:34,509 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:55:34,643 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:55:34,645 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$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-14 11:55:34,645 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((! multithreaded || z$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))) [2024-06-14 11:55:34,646 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))) [2024-06-14 11:55:34,646 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:55:34,646 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-14 11:55:34,709 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:55:34,971 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:55:34,984 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:55:35,110 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:55:35,150 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:55:35,150 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:55:35 WrapperNode [2024-06-14 11:55:35,151 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:55:35,152 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:55:35,152 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:55:35,152 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:55:35,157 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:55:35" (1/1) ... [2024-06-14 11:55:35,185 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:55:35" (1/1) ... [2024-06-14 11:55:35,219 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 150 [2024-06-14 11:55:35,219 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:55:35,220 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:55:35,221 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:55:35,221 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:55:35,229 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:55:35" (1/1) ... [2024-06-14 11:55:35,230 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:55:35" (1/1) ... [2024-06-14 11:55:35,245 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:55:35" (1/1) ... [2024-06-14 11:55:35,262 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 11:55:35,270 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:55:35" (1/1) ... [2024-06-14 11:55:35,270 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:55:35" (1/1) ... [2024-06-14 11:55:35,280 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:55:35" (1/1) ... [2024-06-14 11:55:35,289 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:55:35" (1/1) ... [2024-06-14 11:55:35,291 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:55:35" (1/1) ... [2024-06-14 11:55:35,297 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:55:35" (1/1) ... [2024-06-14 11:55:35,300 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:55:35,303 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:55:35,303 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:55:35,303 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:55:35,304 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:55:35" (1/1) ... [2024-06-14 11:55:35,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:55:35,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:55:35,345 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 11:55:35,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 11:55:35,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:55:35,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:55:35,392 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:55:35,392 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:55:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:55:35,393 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:55:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:55:35,393 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:55:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:55:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:55:35,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:55:35,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:55:35,395 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 11:55:35,526 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:55:35,528 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:55:35,920 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:55:35,920 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:55:36,075 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:55:36,076 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:55:36,077 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:55:36 BoogieIcfgContainer [2024-06-14 11:55:36,078 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:55:36,079 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:55:36,080 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:55:36,082 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:55:36,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:55:34" (1/4) ... [2024-06-14 11:55:36,082 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d33d11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:55:36, skipping insertion in model container [2024-06-14 11:55:36,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:55:34" (2/4) ... [2024-06-14 11:55:36,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d33d11 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:55:36, skipping insertion in model container [2024-06-14 11:55:36,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:55:35" (3/4) ... [2024-06-14 11:55:36,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d33d11 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:55:36, skipping insertion in model container [2024-06-14 11:55:36,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:55:36" (4/4) ... [2024-06-14 11:55:36,085 INFO L112 eAbstractionObserver]: Analyzing ICFG mix011.opt.i [2024-06-14 11:55:36,097 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:55:36,098 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 11:55:36,098 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:55:36,139 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:55:36,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 11:55:36,184 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-14 11:55:36,184 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:55:36,186 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. [2024-06-14 11:55:36,186 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 11:55:36,188 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-14 11:55:36,194 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:55:36,198 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;@50219c9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:55:36,198 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 11:55:36,201 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:55:36,201 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:55:36,201 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:55:36,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:36,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:55:36,202 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:36,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:36,205 INFO L85 PathProgramCache]: Analyzing trace with hash -456574516, now seen corresponding path program 1 times [2024-06-14 11:55:36,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:36,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834791114] [2024-06-14 11:55:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:36,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:37,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:37,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834791114] [2024-06-14 11:55:37,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834791114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:37,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:37,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:55:37,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608889284] [2024-06-14 11:55:37,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:37,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:55:37,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:37,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:55:37,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:55:37,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-14 11:55:37,540 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) [2024-06-14 11:55:37,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:37,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-14 11:55:37,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:37,878 INFO L124 PetriNetUnfolderBase]: 1359/2140 cut-off events. [2024-06-14 11:55:37,879 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-14 11:55:37,885 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. [2024-06-14 11:55:37,895 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-14 11:55:37,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 181 flow [2024-06-14 11:55:37,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:55:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:55:37,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-14 11:55:37,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-06-14 11:55:37,905 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 80 transitions. [2024-06-14 11:55:37,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 181 flow [2024-06-14 11:55:37,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:55:37,909 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-14 11:55:37,910 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} [2024-06-14 11:55:37,912 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-14 11:55:37,912 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-14 11:55:37,913 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) [2024-06-14 11:55:37,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:37,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:37,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:55:37,913 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:37,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:37,914 INFO L85 PathProgramCache]: Analyzing trace with hash -681415701, now seen corresponding path program 1 times [2024-06-14 11:55:37,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:37,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653176389] [2024-06-14 11:55:37,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:37,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:38,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:38,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653176389] [2024-06-14 11:55:38,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653176389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:38,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:38,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:55:38,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569858723] [2024-06-14 11:55:38,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:38,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:55:38,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:38,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:55:38,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:55:38,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:55:38,896 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) [2024-06-14 11:55:38,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:38,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:55:38,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:39,176 INFO L124 PetriNetUnfolderBase]: 1560/2388 cut-off events. [2024-06-14 11:55:39,176 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2024-06-14 11:55:39,179 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. [2024-06-14 11:55:39,188 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 42 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-14 11:55:39,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 250 flow [2024-06-14 11:55:39,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:55:39,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:55:39,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-14 11:55:39,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 11:55:39,192 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 100 transitions. [2024-06-14 11:55:39,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 250 flow [2024-06-14 11:55:39,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:55:39,196 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-14 11:55:39,196 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} [2024-06-14 11:55:39,197 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-14 11:55:39,197 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-14 11:55:39,197 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) [2024-06-14 11:55:39,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:39,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:39,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:55:39,200 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:39,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:39,201 INFO L85 PathProgramCache]: Analyzing trace with hash 350950747, now seen corresponding path program 1 times [2024-06-14 11:55:39,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:39,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050760921] [2024-06-14 11:55:39,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:39,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:40,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:40,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050760921] [2024-06-14 11:55:40,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050760921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:40,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:40,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:55:40,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84803261] [2024-06-14 11:55:40,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:40,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:55:40,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:40,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:55:40,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:55:40,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:55:40,500 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) [2024-06-14 11:55:40,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:40,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:55:40,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:40,814 INFO L124 PetriNetUnfolderBase]: 1568/2456 cut-off events. [2024-06-14 11:55:40,815 INFO L125 PetriNetUnfolderBase]: For 1364/1364 co-relation queries the response was YES. [2024-06-14 11:55:40,818 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. [2024-06-14 11:55:40,826 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 55 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-14 11:55:40,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 77 transitions, 404 flow [2024-06-14 11:55:40,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:55:40,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:55:40,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-14 11:55:40,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 11:55:40,828 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 130 transitions. [2024-06-14 11:55:40,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 77 transitions, 404 flow [2024-06-14 11:55:40,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 390 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 11:55:40,830 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 241 flow [2024-06-14 11:55:40,830 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} [2024-06-14 11:55:40,831 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-06-14 11:55:40,831 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 241 flow [2024-06-14 11:55:40,831 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) [2024-06-14 11:55:40,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:40,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:40,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:55:40,832 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:40,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:40,832 INFO L85 PathProgramCache]: Analyzing trace with hash -2038715558, now seen corresponding path program 1 times [2024-06-14 11:55:40,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:40,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495518185] [2024-06-14 11:55:40,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:40,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:42,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:42,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495518185] [2024-06-14 11:55:42,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495518185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:42,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:42,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:55:42,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482046733] [2024-06-14 11:55:42,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:42,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:55:42,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:42,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:55:42,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:55:42,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:55:42,396 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) [2024-06-14 11:55:42,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:42,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:55:42,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:42,769 INFO L124 PetriNetUnfolderBase]: 1580/2476 cut-off events. [2024-06-14 11:55:42,769 INFO L125 PetriNetUnfolderBase]: For 3221/3223 co-relation queries the response was YES. [2024-06-14 11:55:42,772 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. [2024-06-14 11:55:42,781 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 59 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2024-06-14 11:55:42,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 84 transitions, 507 flow [2024-06-14 11:55:42,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:55:42,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:55:42,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:55:42,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-06-14 11:55:42,782 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 241 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:55:42,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 84 transitions, 507 flow [2024-06-14 11:55:42,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 84 transitions, 499 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 11:55:42,786 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 297 flow [2024-06-14 11:55:42,786 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} [2024-06-14 11:55:42,786 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2024-06-14 11:55:42,787 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 297 flow [2024-06-14 11:55:42,787 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) [2024-06-14 11:55:42,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:42,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:42,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:55:42,787 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:42,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:42,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1789071829, now seen corresponding path program 1 times [2024-06-14 11:55:42,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:42,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642484198] [2024-06-14 11:55:42,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:42,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:43,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:43,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642484198] [2024-06-14 11:55:43,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642484198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:43,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:43,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:55:43,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393396432] [2024-06-14 11:55:43,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:43,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:55:43,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:43,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:55:43,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:55:43,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:55:43,413 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) [2024-06-14 11:55:43,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:43,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:55:43,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:43,806 INFO L124 PetriNetUnfolderBase]: 1368/2207 cut-off events. [2024-06-14 11:55:43,807 INFO L125 PetriNetUnfolderBase]: For 4097/4097 co-relation queries the response was YES. [2024-06-14 11:55:43,810 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. [2024-06-14 11:55:43,817 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 50 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2024-06-14 11:55:43,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 65 transitions, 441 flow [2024-06-14 11:55:43,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:55:43,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:55:43,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-14 11:55:43,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-14 11:55:43,818 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 297 flow. Second operand 5 states and 106 transitions. [2024-06-14 11:55:43,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 65 transitions, 441 flow [2024-06-14 11:55:43,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 65 transitions, 391 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 11:55:43,821 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 271 flow [2024-06-14 11:55:43,822 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} [2024-06-14 11:55:43,822 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-14 11:55:43,822 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 271 flow [2024-06-14 11:55:43,823 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) [2024-06-14 11:55:43,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:43,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:43,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:55:43,823 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:43,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:43,823 INFO L85 PathProgramCache]: Analyzing trace with hash -374644645, now seen corresponding path program 1 times [2024-06-14 11:55:43,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:43,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531224058] [2024-06-14 11:55:43,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:43,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:44,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:44,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531224058] [2024-06-14 11:55:44,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531224058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:44,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:44,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:55:44,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314773500] [2024-06-14 11:55:44,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:44,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:55:44,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:44,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:55:44,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:55:44,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:55:44,565 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) [2024-06-14 11:55:44,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:44,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:55:44,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:45,081 INFO L124 PetriNetUnfolderBase]: 1606/2533 cut-off events. [2024-06-14 11:55:45,081 INFO L125 PetriNetUnfolderBase]: For 5550/5550 co-relation queries the response was YES. [2024-06-14 11:55:45,085 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. [2024-06-14 11:55:45,092 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 55 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2024-06-14 11:55:45,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 459 flow [2024-06-14 11:55:45,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:55:45,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:55:45,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-14 11:55:45,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:55:45,094 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 271 flow. Second operand 6 states and 120 transitions. [2024-06-14 11:55:45,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 459 flow [2024-06-14 11:55:45,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 437 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:55:45,097 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 303 flow [2024-06-14 11:55:45,098 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} [2024-06-14 11:55:45,098 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-14 11:55:45,098 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 303 flow [2024-06-14 11:55:45,098 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) [2024-06-14 11:55:45,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:45,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:45,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:55:45,099 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:45,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:45,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1385399280, now seen corresponding path program 1 times [2024-06-14 11:55:45,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:45,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761684989] [2024-06-14 11:55:45,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:45,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:45,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:45,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761684989] [2024-06-14 11:55:45,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761684989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:45,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:45,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:55:45,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497729308] [2024-06-14 11:55:45,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:45,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:55:45,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:45,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:55:45,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:55:45,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:55:45,822 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) [2024-06-14 11:55:45,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:45,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:55:45,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:46,325 INFO L124 PetriNetUnfolderBase]: 1745/2696 cut-off events. [2024-06-14 11:55:46,326 INFO L125 PetriNetUnfolderBase]: For 8609/8613 co-relation queries the response was YES. [2024-06-14 11:55:46,331 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. [2024-06-14 11:55:46,346 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 54 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-06-14 11:55:46,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 80 transitions, 545 flow [2024-06-14 11:55:46,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:55:46,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:55:46,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-14 11:55:46,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-14 11:55:46,347 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 303 flow. Second operand 6 states and 129 transitions. [2024-06-14 11:55:46,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 80 transitions, 545 flow [2024-06-14 11:55:46,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 80 transitions, 515 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 11:55:46,353 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 345 flow [2024-06-14 11:55:46,353 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} [2024-06-14 11:55:46,355 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-06-14 11:55:46,355 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 345 flow [2024-06-14 11:55:46,355 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) [2024-06-14 11:55:46,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:46,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:46,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:55:46,355 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:46,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:46,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1311128692, now seen corresponding path program 2 times [2024-06-14 11:55:46,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:46,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415610325] [2024-06-14 11:55:46,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:46,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:47,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:47,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415610325] [2024-06-14 11:55:47,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415610325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:47,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:47,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:55:47,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001562630] [2024-06-14 11:55:47,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:47,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:55:47,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:47,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:55:47,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:55:47,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:55:47,103 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) [2024-06-14 11:55:47,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:47,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:55:47,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:47,600 INFO L124 PetriNetUnfolderBase]: 1733/2669 cut-off events. [2024-06-14 11:55:47,600 INFO L125 PetriNetUnfolderBase]: For 10388/10392 co-relation queries the response was YES. [2024-06-14 11:55:47,606 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. [2024-06-14 11:55:47,615 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 48 selfloop transitions, 20 changer transitions 0/75 dead transitions. [2024-06-14 11:55:47,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 519 flow [2024-06-14 11:55:47,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:55:47,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:55:47,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-14 11:55:47,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-06-14 11:55:47,619 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 345 flow. Second operand 6 states and 125 transitions. [2024-06-14 11:55:47,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 519 flow [2024-06-14 11:55:47,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 75 transitions, 490 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 11:55:47,626 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 364 flow [2024-06-14 11:55:47,626 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} [2024-06-14 11:55:47,627 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 21 predicate places. [2024-06-14 11:55:47,628 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 364 flow [2024-06-14 11:55:47,628 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) [2024-06-14 11:55:47,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:47,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:47,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:55:47,628 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:47,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:47,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1270918778, now seen corresponding path program 1 times [2024-06-14 11:55:47,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:47,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145677742] [2024-06-14 11:55:47,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:47,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:48,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:48,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145677742] [2024-06-14 11:55:48,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145677742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:48,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:48,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:55:48,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872124645] [2024-06-14 11:55:48,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:48,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:55:48,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:48,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:55:48,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:55:48,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:55:48,500 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) [2024-06-14 11:55:48,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:48,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:55:48,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:49,053 INFO L124 PetriNetUnfolderBase]: 1590/2517 cut-off events. [2024-06-14 11:55:49,054 INFO L125 PetriNetUnfolderBase]: For 10273/10273 co-relation queries the response was YES. [2024-06-14 11:55:49,059 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. [2024-06-14 11:55:49,067 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 63 selfloop transitions, 14 changer transitions 0/83 dead transitions. [2024-06-14 11:55:49,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 83 transitions, 590 flow [2024-06-14 11:55:49,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:55:49,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:55:49,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 11:55:49,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-14 11:55:49,068 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 364 flow. Second operand 7 states and 139 transitions. [2024-06-14 11:55:49,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 83 transitions, 590 flow [2024-06-14 11:55:49,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 525 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 11:55:49,077 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 363 flow [2024-06-14 11:55:49,077 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} [2024-06-14 11:55:49,077 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2024-06-14 11:55:49,078 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 363 flow [2024-06-14 11:55:49,078 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) [2024-06-14 11:55:49,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:49,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:49,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:55:49,078 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:49,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:49,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1430626116, now seen corresponding path program 1 times [2024-06-14 11:55:49,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:49,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272102544] [2024-06-14 11:55:49,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:49,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:49,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:49,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272102544] [2024-06-14 11:55:49,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272102544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:49,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:49,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:55:49,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303672781] [2024-06-14 11:55:49,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:49,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:55:49,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:49,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:55:49,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:55:49,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:49,964 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) [2024-06-14 11:55:49,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:49,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:49,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:50,569 INFO L124 PetriNetUnfolderBase]: 1856/2804 cut-off events. [2024-06-14 11:55:50,569 INFO L125 PetriNetUnfolderBase]: For 14897/14901 co-relation queries the response was YES. [2024-06-14 11:55:50,574 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. [2024-06-14 11:55:50,582 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 64 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-06-14 11:55:50,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 95 transitions, 695 flow [2024-06-14 11:55:50,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:55:50,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:55:50,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-14 11:55:50,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-14 11:55:50,584 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 363 flow. Second operand 7 states and 144 transitions. [2024-06-14 11:55:50,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 95 transitions, 695 flow [2024-06-14 11:55:50,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 655 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 11:55:50,590 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 442 flow [2024-06-14 11:55:50,590 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} [2024-06-14 11:55:50,591 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 24 predicate places. [2024-06-14 11:55:50,591 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 442 flow [2024-06-14 11:55:50,591 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) [2024-06-14 11:55:50,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:50,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:50,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:55:50,592 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:50,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:50,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1990284642, now seen corresponding path program 2 times [2024-06-14 11:55:50,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:50,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786843422] [2024-06-14 11:55:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:50,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:51,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:51,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786843422] [2024-06-14 11:55:51,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786843422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:51,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:51,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:55:51,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178291468] [2024-06-14 11:55:51,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:51,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:55:51,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:51,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:55:51,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:55:51,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:51,428 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) [2024-06-14 11:55:51,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:51,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:51,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:51,997 INFO L124 PetriNetUnfolderBase]: 1867/2816 cut-off events. [2024-06-14 11:55:51,997 INFO L125 PetriNetUnfolderBase]: For 18505/18509 co-relation queries the response was YES. [2024-06-14 11:55:52,008 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. [2024-06-14 11:55:52,022 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 61 selfloop transitions, 33 changer transitions 0/99 dead transitions. [2024-06-14 11:55:52,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 826 flow [2024-06-14 11:55:52,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:55:52,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:55:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-14 11:55:52,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-14 11:55:52,024 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 442 flow. Second operand 7 states and 144 transitions. [2024-06-14 11:55:52,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 826 flow [2024-06-14 11:55:52,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 99 transitions, 790 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 11:55:52,035 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 542 flow [2024-06-14 11:55:52,035 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} [2024-06-14 11:55:52,035 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-06-14 11:55:52,036 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 542 flow [2024-06-14 11:55:52,036 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) [2024-06-14 11:55:52,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:52,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:52,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:55:52,036 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:52,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:52,037 INFO L85 PathProgramCache]: Analyzing trace with hash 743768442, now seen corresponding path program 3 times [2024-06-14 11:55:52,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:52,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728292371] [2024-06-14 11:55:52,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:52,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:52,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:52,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728292371] [2024-06-14 11:55:52,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728292371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:52,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:52,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:55:52,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055453112] [2024-06-14 11:55:52,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:52,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:55:52,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:52,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:55:52,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:55:52,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:52,858 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) [2024-06-14 11:55:52,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:52,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:52,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:53,437 INFO L124 PetriNetUnfolderBase]: 1862/2809 cut-off events. [2024-06-14 11:55:53,438 INFO L125 PetriNetUnfolderBase]: For 21860/21864 co-relation queries the response was YES. [2024-06-14 11:55:53,444 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. [2024-06-14 11:55:53,455 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 58 selfloop transitions, 34 changer transitions 0/97 dead transitions. [2024-06-14 11:55:53,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 97 transitions, 822 flow [2024-06-14 11:55:53,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:55:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:55:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-14 11:55:53,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-14 11:55:53,457 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 542 flow. Second operand 7 states and 142 transitions. [2024-06-14 11:55:53,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 97 transitions, 822 flow [2024-06-14 11:55:53,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 97 transitions, 767 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-14 11:55:53,469 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 563 flow [2024-06-14 11:55:53,470 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} [2024-06-14 11:55:53,470 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-06-14 11:55:53,470 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 563 flow [2024-06-14 11:55:53,470 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) [2024-06-14 11:55:53,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:53,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:53,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:55:53,471 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)] === [2024-06-14 11:55:53,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:53,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1280814125, now seen corresponding path program 1 times [2024-06-14 11:55:53,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:53,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080910673] [2024-06-14 11:55:53,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:53,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:54,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:54,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080910673] [2024-06-14 11:55:54,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080910673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:54,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:54,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:55:54,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274622350] [2024-06-14 11:55:54,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:54,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:55:54,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:54,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:55:54,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:55:54,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:55:54,327 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) [2024-06-14 11:55:54,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:54,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:55:54,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:54,708 INFO L124 PetriNetUnfolderBase]: 1534/2474 cut-off events. [2024-06-14 11:55:54,708 INFO L125 PetriNetUnfolderBase]: For 20405/20405 co-relation queries the response was YES. [2024-06-14 11:55:54,713 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. [2024-06-14 11:55:54,720 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 67 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2024-06-14 11:55:54,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 755 flow [2024-06-14 11:55:54,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:55:54,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:55:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-06-14 11:55:54,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-14 11:55:54,721 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 563 flow. Second operand 5 states and 102 transitions. [2024-06-14 11:55:54,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 755 flow [2024-06-14 11:55:54,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 87 transitions, 667 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:55:54,730 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 525 flow [2024-06-14 11:55:54,730 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} [2024-06-14 11:55:54,731 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 31 predicate places. [2024-06-14 11:55:54,731 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 525 flow [2024-06-14 11:55:54,731 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) [2024-06-14 11:55:54,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:54,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:54,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:55:54,731 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:54,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:54,732 INFO L85 PathProgramCache]: Analyzing trace with hash -71126321, now seen corresponding path program 1 times [2024-06-14 11:55:54,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:54,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610772923] [2024-06-14 11:55:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:54,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:55,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:55,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610772923] [2024-06-14 11:55:55,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610772923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:55,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:55,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:55:55,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802777378] [2024-06-14 11:55:55,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:55,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:55:55,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:55,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:55:55,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:55:55,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:55,719 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) [2024-06-14 11:55:55,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:55,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:55,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:56,477 INFO L124 PetriNetUnfolderBase]: 1903/2883 cut-off events. [2024-06-14 11:55:56,477 INFO L125 PetriNetUnfolderBase]: For 27655/27659 co-relation queries the response was YES. [2024-06-14 11:55:56,484 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. [2024-06-14 11:55:56,495 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 77 selfloop transitions, 36 changer transitions 0/118 dead transitions. [2024-06-14 11:55:56,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 118 transitions, 945 flow [2024-06-14 11:55:56,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:55:56,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:55:56,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 11:55:56,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-14 11:55:56,497 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 525 flow. Second operand 8 states and 167 transitions. [2024-06-14 11:55:56,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 118 transitions, 945 flow [2024-06-14 11:55:56,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 118 transitions, 917 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 11:55:56,511 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 646 flow [2024-06-14 11:55:56,511 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} [2024-06-14 11:55:56,511 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 36 predicate places. [2024-06-14 11:55:56,512 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 646 flow [2024-06-14 11:55:56,512 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) [2024-06-14 11:55:56,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:56,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:56,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:55:56,512 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:56,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:56,513 INFO L85 PathProgramCache]: Analyzing trace with hash -71132118, now seen corresponding path program 1 times [2024-06-14 11:55:56,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:56,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349961268] [2024-06-14 11:55:56,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:56,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:57,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:57,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349961268] [2024-06-14 11:55:57,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349961268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:57,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:57,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:55:57,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354758924] [2024-06-14 11:55:57,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:57,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:55:57,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:57,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:55:57,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:55:57,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:57,317 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) [2024-06-14 11:55:57,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:57,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:57,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:57,898 INFO L124 PetriNetUnfolderBase]: 1914/2909 cut-off events. [2024-06-14 11:55:57,898 INFO L125 PetriNetUnfolderBase]: For 32077/32079 co-relation queries the response was YES. [2024-06-14 11:55:57,904 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. [2024-06-14 11:55:57,912 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 75 selfloop transitions, 36 changer transitions 0/116 dead transitions. [2024-06-14 11:55:57,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 116 transitions, 1028 flow [2024-06-14 11:55:57,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:55:57,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:55:57,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-14 11:55:57,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-14 11:55:57,914 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 646 flow. Second operand 7 states and 147 transitions. [2024-06-14 11:55:57,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 116 transitions, 1028 flow [2024-06-14 11:55:57,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 116 transitions, 979 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 11:55:57,929 INFO L231 Difference]: Finished difference. Result has 84 places, 89 transitions, 715 flow [2024-06-14 11:55:57,929 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} [2024-06-14 11:55:57,929 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 39 predicate places. [2024-06-14 11:55:57,930 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 89 transitions, 715 flow [2024-06-14 11:55:57,930 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) [2024-06-14 11:55:57,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:57,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:57,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:55:57,930 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:57,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:57,931 INFO L85 PathProgramCache]: Analyzing trace with hash -347173778, now seen corresponding path program 2 times [2024-06-14 11:55:57,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:57,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259975858] [2024-06-14 11:55:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:57,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:58,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:58,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259975858] [2024-06-14 11:55:58,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259975858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:58,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:58,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:55:58,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284578433] [2024-06-14 11:55:58,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:58,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:55:58,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:58,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:55:58,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:55:58,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:58,793 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) [2024-06-14 11:55:58,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:58,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:58,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:59,438 INFO L124 PetriNetUnfolderBase]: 1925/2925 cut-off events. [2024-06-14 11:55:59,439 INFO L125 PetriNetUnfolderBase]: For 36206/36208 co-relation queries the response was YES. [2024-06-14 11:55:59,444 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. [2024-06-14 11:55:59,451 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 75 selfloop transitions, 36 changer transitions 0/116 dead transitions. [2024-06-14 11:55:59,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 116 transitions, 1099 flow [2024-06-14 11:55:59,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:55:59,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:55:59,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-14 11:55:59,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-14 11:55:59,453 INFO L175 Difference]: Start difference. First operand has 84 places, 89 transitions, 715 flow. Second operand 7 states and 143 transitions. [2024-06-14 11:55:59,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 116 transitions, 1099 flow [2024-06-14 11:55:59,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 116 transitions, 979 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 11:55:59,467 INFO L231 Difference]: Finished difference. Result has 85 places, 92 transitions, 720 flow [2024-06-14 11:55:59,467 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} [2024-06-14 11:55:59,467 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-14 11:55:59,467 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 92 transitions, 720 flow [2024-06-14 11:55:59,468 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) [2024-06-14 11:55:59,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:59,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:59,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:55:59,468 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:59,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:59,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1569484236, now seen corresponding path program 3 times [2024-06-14 11:55:59,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:59,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336886914] [2024-06-14 11:55:59,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:59,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:00,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:00,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336886914] [2024-06-14 11:56:00,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336886914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:00,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:00,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:00,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826107295] [2024-06-14 11:56:00,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:00,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:00,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:00,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:00,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:00,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:00,256 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) [2024-06-14 11:56:00,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:00,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:00,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:00,971 INFO L124 PetriNetUnfolderBase]: 1920/2918 cut-off events. [2024-06-14 11:56:00,974 INFO L125 PetriNetUnfolderBase]: For 39693/39699 co-relation queries the response was YES. [2024-06-14 11:56:00,981 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. [2024-06-14 11:56:00,993 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 72 selfloop transitions, 34 changer transitions 0/111 dead transitions. [2024-06-14 11:56:00,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 111 transitions, 980 flow [2024-06-14 11:56:00,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:00,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:00,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 11:56:00,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-14 11:56:00,995 INFO L175 Difference]: Start difference. First operand has 85 places, 92 transitions, 720 flow. Second operand 7 states and 137 transitions. [2024-06-14 11:56:00,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 111 transitions, 980 flow [2024-06-14 11:56:01,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 111 transitions, 902 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 11:56:01,014 INFO L231 Difference]: Finished difference. Result has 88 places, 92 transitions, 718 flow [2024-06-14 11:56:01,014 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} [2024-06-14 11:56:01,014 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-14 11:56:01,014 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 92 transitions, 718 flow [2024-06-14 11:56:01,015 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) [2024-06-14 11:56:01,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:01,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:01,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:56:01,015 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:01,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:01,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1569282643, now seen corresponding path program 2 times [2024-06-14 11:56:01,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:01,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619733646] [2024-06-14 11:56:01,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:01,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:01,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:01,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619733646] [2024-06-14 11:56:01,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619733646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:01,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:01,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:01,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691892705] [2024-06-14 11:56:01,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:01,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:01,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:01,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:01,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:01,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:01,964 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) [2024-06-14 11:56:01,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:01,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:01,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:02,642 INFO L124 PetriNetUnfolderBase]: 1942/2938 cut-off events. [2024-06-14 11:56:02,643 INFO L125 PetriNetUnfolderBase]: For 44285/44289 co-relation queries the response was YES. [2024-06-14 11:56:02,652 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. [2024-06-14 11:56:02,663 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 75 selfloop transitions, 49 changer transitions 0/129 dead transitions. [2024-06-14 11:56:02,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 129 transitions, 1240 flow [2024-06-14 11:56:02,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-14 11:56:02,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-14 11:56:02,664 INFO L175 Difference]: Start difference. First operand has 88 places, 92 transitions, 718 flow. Second operand 8 states and 168 transitions. [2024-06-14 11:56:02,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 129 transitions, 1240 flow [2024-06-14 11:56:02,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 129 transitions, 1139 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:56:02,686 INFO L231 Difference]: Finished difference. Result has 89 places, 98 transitions, 793 flow [2024-06-14 11:56:02,686 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} [2024-06-14 11:56:02,686 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 44 predicate places. [2024-06-14 11:56:02,686 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 98 transitions, 793 flow [2024-06-14 11:56:02,687 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) [2024-06-14 11:56:02,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:02,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:02,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:56:02,687 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:02,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:02,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1582253017, now seen corresponding path program 3 times [2024-06-14 11:56:02,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:02,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778861193] [2024-06-14 11:56:02,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:02,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:03,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:03,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778861193] [2024-06-14 11:56:03,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778861193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:03,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:03,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:03,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73738213] [2024-06-14 11:56:03,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:03,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:03,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:03,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:03,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:03,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:03,455 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) [2024-06-14 11:56:03,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:03,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:03,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:04,076 INFO L124 PetriNetUnfolderBase]: 1964/2972 cut-off events. [2024-06-14 11:56:04,077 INFO L125 PetriNetUnfolderBase]: For 49469/49473 co-relation queries the response was YES. [2024-06-14 11:56:04,084 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. [2024-06-14 11:56:04,093 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 71 selfloop transitions, 55 changer transitions 0/131 dead transitions. [2024-06-14 11:56:04,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 131 transitions, 1297 flow [2024-06-14 11:56:04,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:04,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:04,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 11:56:04,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-14 11:56:04,096 INFO L175 Difference]: Start difference. First operand has 89 places, 98 transitions, 793 flow. Second operand 8 states and 167 transitions. [2024-06-14 11:56:04,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 131 transitions, 1297 flow [2024-06-14 11:56:04,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 131 transitions, 1245 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 11:56:04,116 INFO L231 Difference]: Finished difference. Result has 94 places, 101 transitions, 899 flow [2024-06-14 11:56:04,116 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} [2024-06-14 11:56:04,117 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-14 11:56:04,117 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 101 transitions, 899 flow [2024-06-14 11:56:04,117 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) [2024-06-14 11:56:04,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:04,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:04,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:56:04,118 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:04,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:04,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1691768301, now seen corresponding path program 4 times [2024-06-14 11:56:04,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:04,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686715875] [2024-06-14 11:56:04,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:04,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:04,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:04,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:04,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686715875] [2024-06-14 11:56:04,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686715875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:04,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:04,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:04,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159297957] [2024-06-14 11:56:04,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:04,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:04,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:04,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:04,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:04,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:04,941 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) [2024-06-14 11:56:04,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:04,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:04,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:05,597 INFO L124 PetriNetUnfolderBase]: 1954/2961 cut-off events. [2024-06-14 11:56:05,597 INFO L125 PetriNetUnfolderBase]: For 53152/53156 co-relation queries the response was YES. [2024-06-14 11:56:05,604 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. [2024-06-14 11:56:05,614 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 72 selfloop transitions, 53 changer transitions 0/130 dead transitions. [2024-06-14 11:56:05,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 130 transitions, 1293 flow [2024-06-14 11:56:05,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-14 11:56:05,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-14 11:56:05,616 INFO L175 Difference]: Start difference. First operand has 94 places, 101 transitions, 899 flow. Second operand 8 states and 166 transitions. [2024-06-14 11:56:05,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 130 transitions, 1293 flow [2024-06-14 11:56:05,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 130 transitions, 1129 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:05,643 INFO L231 Difference]: Finished difference. Result has 96 places, 101 transitions, 849 flow [2024-06-14 11:56:05,644 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} [2024-06-14 11:56:05,644 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 51 predicate places. [2024-06-14 11:56:05,644 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 101 transitions, 849 flow [2024-06-14 11:56:05,644 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) [2024-06-14 11:56:05,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:05,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:05,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:56:05,645 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)] === [2024-06-14 11:56:05,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:05,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1050533193, now seen corresponding path program 1 times [2024-06-14 11:56:05,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:05,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352473647] [2024-06-14 11:56:05,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:05,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:06,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:06,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352473647] [2024-06-14 11:56:06,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352473647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:06,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:06,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:56:06,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474952411] [2024-06-14 11:56:06,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:06,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:56:06,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:06,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:56:06,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:56:06,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:56:06,907 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) [2024-06-14 11:56:06,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:06,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:56:06,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:07,272 INFO L124 PetriNetUnfolderBase]: 1616/2617 cut-off events. [2024-06-14 11:56:07,272 INFO L125 PetriNetUnfolderBase]: For 48128/48128 co-relation queries the response was YES. [2024-06-14 11:56:07,279 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. [2024-06-14 11:56:07,287 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 89 selfloop transitions, 11 changer transitions 0/114 dead transitions. [2024-06-14 11:56:07,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 114 transitions, 1099 flow [2024-06-14 11:56:07,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:56:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:56:07,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-14 11:56:07,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45075757575757575 [2024-06-14 11:56:07,289 INFO L175 Difference]: Start difference. First operand has 96 places, 101 transitions, 849 flow. Second operand 6 states and 119 transitions. [2024-06-14 11:56:07,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 114 transitions, 1099 flow [2024-06-14 11:56:07,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 114 transitions, 966 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 11:56:07,346 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 776 flow [2024-06-14 11:56:07,346 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} [2024-06-14 11:56:07,347 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-14 11:56:07,347 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 776 flow [2024-06-14 11:56:07,347 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) [2024-06-14 11:56:07,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:07,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:07,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:56:07,348 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:07,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:07,348 INFO L85 PathProgramCache]: Analyzing trace with hash 323858279, now seen corresponding path program 1 times [2024-06-14 11:56:07,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:07,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597491441] [2024-06-14 11:56:07,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:07,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:08,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:08,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597491441] [2024-06-14 11:56:08,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597491441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:08,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:08,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:08,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088530749] [2024-06-14 11:56:08,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:08,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:08,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:08,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:08,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:08,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:08,235 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) [2024-06-14 11:56:08,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:08,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:08,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:08,768 INFO L124 PetriNetUnfolderBase]: 1859/2880 cut-off events. [2024-06-14 11:56:08,769 INFO L125 PetriNetUnfolderBase]: For 60730/60732 co-relation queries the response was YES. [2024-06-14 11:56:08,776 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. [2024-06-14 11:56:08,784 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 98 selfloop transitions, 23 changer transitions 0/134 dead transitions. [2024-06-14 11:56:08,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 134 transitions, 1210 flow [2024-06-14 11:56:08,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:08,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-14 11:56:08,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-14 11:56:08,785 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 776 flow. Second operand 7 states and 147 transitions. [2024-06-14 11:56:08,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 134 transitions, 1210 flow [2024-06-14 11:56:08,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 134 transitions, 1172 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 11:56:08,811 INFO L231 Difference]: Finished difference. Result has 97 places, 108 transitions, 843 flow [2024-06-14 11:56:08,812 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} [2024-06-14 11:56:08,812 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 52 predicate places. [2024-06-14 11:56:08,812 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 108 transitions, 843 flow [2024-06-14 11:56:08,812 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) [2024-06-14 11:56:08,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:08,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:08,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:56:08,813 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:08,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:08,813 INFO L85 PathProgramCache]: Analyzing trace with hash 326715239, now seen corresponding path program 2 times [2024-06-14 11:56:08,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:08,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239710961] [2024-06-14 11:56:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:08,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:09,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:09,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239710961] [2024-06-14 11:56:09,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239710961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:09,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:09,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:09,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001107397] [2024-06-14 11:56:09,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:09,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:09,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:09,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:09,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:09,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:09,638 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) [2024-06-14 11:56:09,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:09,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:09,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:10,210 INFO L124 PetriNetUnfolderBase]: 1851/2868 cut-off events. [2024-06-14 11:56:10,210 INFO L125 PetriNetUnfolderBase]: For 65529/65531 co-relation queries the response was YES. [2024-06-14 11:56:10,217 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. [2024-06-14 11:56:10,226 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 97 selfloop transitions, 21 changer transitions 0/131 dead transitions. [2024-06-14 11:56:10,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 131 transitions, 1137 flow [2024-06-14 11:56:10,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:10,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:10,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-14 11:56:10,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-14 11:56:10,227 INFO L175 Difference]: Start difference. First operand has 97 places, 108 transitions, 843 flow. Second operand 7 states and 145 transitions. [2024-06-14 11:56:10,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 131 transitions, 1137 flow [2024-06-14 11:56:10,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 131 transitions, 1082 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 11:56:10,253 INFO L231 Difference]: Finished difference. Result has 101 places, 108 transitions, 837 flow [2024-06-14 11:56:10,253 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} [2024-06-14 11:56:10,254 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-14 11:56:10,254 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 108 transitions, 837 flow [2024-06-14 11:56:10,254 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) [2024-06-14 11:56:10,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:10,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:10,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:56:10,254 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:10,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:10,255 INFO L85 PathProgramCache]: Analyzing trace with hash 442011369, now seen corresponding path program 1 times [2024-06-14 11:56:10,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:10,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287232706] [2024-06-14 11:56:10,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:10,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:10,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:10,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287232706] [2024-06-14 11:56:10,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287232706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:10,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:10,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:10,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107653466] [2024-06-14 11:56:10,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:10,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:10,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:10,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:10,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:11,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:11,076 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) [2024-06-14 11:56:11,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:11,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:11,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:11,767 INFO L124 PetriNetUnfolderBase]: 1976/3018 cut-off events. [2024-06-14 11:56:11,767 INFO L125 PetriNetUnfolderBase]: For 71406/71408 co-relation queries the response was YES. [2024-06-14 11:56:11,775 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. [2024-06-14 11:56:11,785 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 86 selfloop transitions, 55 changer transitions 0/146 dead transitions. [2024-06-14 11:56:11,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 146 transitions, 1331 flow [2024-06-14 11:56:11,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:11,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:11,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-14 11:56:11,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48579545454545453 [2024-06-14 11:56:11,787 INFO L175 Difference]: Start difference. First operand has 101 places, 108 transitions, 837 flow. Second operand 8 states and 171 transitions. [2024-06-14 11:56:11,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 146 transitions, 1331 flow [2024-06-14 11:56:11,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 146 transitions, 1281 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:11,822 INFO L231 Difference]: Finished difference. Result has 103 places, 111 transitions, 943 flow [2024-06-14 11:56:11,822 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} [2024-06-14 11:56:11,824 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-14 11:56:11,824 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 111 transitions, 943 flow [2024-06-14 11:56:11,824 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) [2024-06-14 11:56:11,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:11,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:11,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:56:11,824 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:11,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:11,825 INFO L85 PathProgramCache]: Analyzing trace with hash 442190859, now seen corresponding path program 2 times [2024-06-14 11:56:11,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:11,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667102489] [2024-06-14 11:56:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:11,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:12,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:12,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667102489] [2024-06-14 11:56:12,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667102489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:12,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:12,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:12,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580171038] [2024-06-14 11:56:12,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:12,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:12,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:12,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:12,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:12,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:12,565 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) [2024-06-14 11:56:12,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:12,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:12,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:13,279 INFO L124 PetriNetUnfolderBase]: 2030/3111 cut-off events. [2024-06-14 11:56:13,279 INFO L125 PetriNetUnfolderBase]: For 79203/79205 co-relation queries the response was YES. [2024-06-14 11:56:13,287 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. [2024-06-14 11:56:13,295 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 89 selfloop transitions, 57 changer transitions 0/151 dead transitions. [2024-06-14 11:56:13,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 151 transitions, 1589 flow [2024-06-14 11:56:13,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:13,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-14 11:56:13,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-14 11:56:13,297 INFO L175 Difference]: Start difference. First operand has 103 places, 111 transitions, 943 flow. Second operand 8 states and 169 transitions. [2024-06-14 11:56:13,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 151 transitions, 1589 flow [2024-06-14 11:56:13,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 151 transitions, 1404 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 11:56:13,337 INFO L231 Difference]: Finished difference. Result has 104 places, 117 transitions, 969 flow [2024-06-14 11:56:13,337 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} [2024-06-14 11:56:13,337 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2024-06-14 11:56:13,338 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 117 transitions, 969 flow [2024-06-14 11:56:13,338 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) [2024-06-14 11:56:13,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:13,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:13,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:56:13,338 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:13,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:13,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2122515655, now seen corresponding path program 3 times [2024-06-14 11:56:13,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:13,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544154174] [2024-06-14 11:56:13,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:13,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:14,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:14,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544154174] [2024-06-14 11:56:14,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544154174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:14,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:14,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:14,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322502428] [2024-06-14 11:56:14,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:14,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:14,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:14,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:14,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:14,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:14,223 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) [2024-06-14 11:56:14,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:14,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:14,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:14,888 INFO L124 PetriNetUnfolderBase]: 2020/3097 cut-off events. [2024-06-14 11:56:14,889 INFO L125 PetriNetUnfolderBase]: For 83197/83199 co-relation queries the response was YES. [2024-06-14 11:56:14,898 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. [2024-06-14 11:56:14,909 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 89 selfloop transitions, 56 changer transitions 0/150 dead transitions. [2024-06-14 11:56:14,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 150 transitions, 1435 flow [2024-06-14 11:56:14,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:14,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-14 11:56:14,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-14 11:56:14,911 INFO L175 Difference]: Start difference. First operand has 104 places, 117 transitions, 969 flow. Second operand 8 states and 169 transitions. [2024-06-14 11:56:14,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 150 transitions, 1435 flow [2024-06-14 11:56:14,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 150 transitions, 1326 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 11:56:14,949 INFO L231 Difference]: Finished difference. Result has 108 places, 117 transitions, 980 flow [2024-06-14 11:56:14,949 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} [2024-06-14 11:56:14,949 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-06-14 11:56:14,949 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 117 transitions, 980 flow [2024-06-14 11:56:14,950 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) [2024-06-14 11:56:14,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:14,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:14,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:56:14,950 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)] === [2024-06-14 11:56:14,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:14,950 INFO L85 PathProgramCache]: Analyzing trace with hash 708855918, now seen corresponding path program 1 times [2024-06-14 11:56:14,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:14,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725229384] [2024-06-14 11:56:14,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:14,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:15,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:15,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725229384] [2024-06-14 11:56:15,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725229384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:15,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:15,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:56:15,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246001555] [2024-06-14 11:56:15,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:15,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:56:15,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:15,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:56:15,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:56:15,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:15,718 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) [2024-06-14 11:56:15,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:15,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:15,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:16,156 INFO L124 PetriNetUnfolderBase]: 1918/2991 cut-off events. [2024-06-14 11:56:16,156 INFO L125 PetriNetUnfolderBase]: For 88472/88472 co-relation queries the response was YES. [2024-06-14 11:56:16,167 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. [2024-06-14 11:56:16,178 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 111 selfloop transitions, 11 changer transitions 0/135 dead transitions. [2024-06-14 11:56:16,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 135 transitions, 1290 flow [2024-06-14 11:56:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:56:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:56:16,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-14 11:56:16,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45075757575757575 [2024-06-14 11:56:16,180 INFO L175 Difference]: Start difference. First operand has 108 places, 117 transitions, 980 flow. Second operand 6 states and 119 transitions. [2024-06-14 11:56:16,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 135 transitions, 1290 flow [2024-06-14 11:56:16,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 135 transitions, 1165 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 11:56:16,225 INFO L231 Difference]: Finished difference. Result has 107 places, 120 transitions, 917 flow [2024-06-14 11:56:16,226 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} [2024-06-14 11:56:16,226 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 62 predicate places. [2024-06-14 11:56:16,226 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 120 transitions, 917 flow [2024-06-14 11:56:16,226 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) [2024-06-14 11:56:16,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:16,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:16,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:56:16,227 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:16,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:16,227 INFO L85 PathProgramCache]: Analyzing trace with hash -905209111, now seen corresponding path program 4 times [2024-06-14 11:56:16,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:16,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793010534] [2024-06-14 11:56:16,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:16,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:17,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:17,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793010534] [2024-06-14 11:56:17,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793010534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:17,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:17,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:17,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416472458] [2024-06-14 11:56:17,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:17,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:17,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:17,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:17,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:17,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:17,098 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) [2024-06-14 11:56:17,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:17,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:17,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:17,761 INFO L124 PetriNetUnfolderBase]: 2079/3197 cut-off events. [2024-06-14 11:56:17,761 INFO L125 PetriNetUnfolderBase]: For 96815/96821 co-relation queries the response was YES. [2024-06-14 11:56:17,771 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. [2024-06-14 11:56:17,818 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 93 selfloop transitions, 59 changer transitions 0/157 dead transitions. [2024-06-14 11:56:17,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 157 transitions, 1575 flow [2024-06-14 11:56:17,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:17,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:17,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-14 11:56:17,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-14 11:56:17,820 INFO L175 Difference]: Start difference. First operand has 107 places, 120 transitions, 917 flow. Second operand 8 states and 166 transitions. [2024-06-14 11:56:17,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 157 transitions, 1575 flow [2024-06-14 11:56:17,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 157 transitions, 1535 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 11:56:17,854 INFO L231 Difference]: Finished difference. Result has 111 places, 126 transitions, 1079 flow [2024-06-14 11:56:17,854 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} [2024-06-14 11:56:17,858 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-14 11:56:17,858 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 126 transitions, 1079 flow [2024-06-14 11:56:17,859 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) [2024-06-14 11:56:17,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:17,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:17,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:56:17,859 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:17,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:17,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1235376045, now seen corresponding path program 5 times [2024-06-14 11:56:17,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:17,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289809479] [2024-06-14 11:56:17,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:17,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:18,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:18,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289809479] [2024-06-14 11:56:18,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289809479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:18,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:18,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:18,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094783808] [2024-06-14 11:56:18,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:18,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:18,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:18,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:18,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:18,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:18,743 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) [2024-06-14 11:56:18,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:18,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:18,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:19,471 INFO L124 PetriNetUnfolderBase]: 2069/3183 cut-off events. [2024-06-14 11:56:19,471 INFO L125 PetriNetUnfolderBase]: For 102787/102793 co-relation queries the response was YES. [2024-06-14 11:56:19,481 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. [2024-06-14 11:56:19,492 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 90 selfloop transitions, 60 changer transitions 0/155 dead transitions. [2024-06-14 11:56:19,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 155 transitions, 1555 flow [2024-06-14 11:56:19,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:19,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:19,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-14 11:56:19,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-14 11:56:19,494 INFO L175 Difference]: Start difference. First operand has 111 places, 126 transitions, 1079 flow. Second operand 8 states and 163 transitions. [2024-06-14 11:56:19,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 155 transitions, 1555 flow [2024-06-14 11:56:19,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 155 transitions, 1388 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 11:56:19,539 INFO L231 Difference]: Finished difference. Result has 114 places, 126 transitions, 1040 flow [2024-06-14 11:56:19,539 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} [2024-06-14 11:56:19,540 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-06-14 11:56:19,540 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 126 transitions, 1040 flow [2024-06-14 11:56:19,540 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) [2024-06-14 11:56:19,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:19,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:19,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:56:19,541 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:19,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:19,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1631254135, now seen corresponding path program 6 times [2024-06-14 11:56:19,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:19,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818873043] [2024-06-14 11:56:19,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:19,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:20,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:20,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818873043] [2024-06-14 11:56:20,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818873043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:20,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:20,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:20,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517902822] [2024-06-14 11:56:20,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:20,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:20,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:20,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:20,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:20,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:20,371 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) [2024-06-14 11:56:20,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:20,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:20,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:21,058 INFO L124 PetriNetUnfolderBase]: 2059/3169 cut-off events. [2024-06-14 11:56:21,058 INFO L125 PetriNetUnfolderBase]: For 107243/107249 co-relation queries the response was YES. [2024-06-14 11:56:21,068 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. [2024-06-14 11:56:21,078 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 84 selfloop transitions, 63 changer transitions 0/152 dead transitions. [2024-06-14 11:56:21,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 152 transitions, 1398 flow [2024-06-14 11:56:21,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:21,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 11:56:21,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-14 11:56:21,080 INFO L175 Difference]: Start difference. First operand has 114 places, 126 transitions, 1040 flow. Second operand 8 states and 159 transitions. [2024-06-14 11:56:21,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 152 transitions, 1398 flow [2024-06-14 11:56:21,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 152 transitions, 1241 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 11:56:21,121 INFO L231 Difference]: Finished difference. Result has 115 places, 126 transitions, 1017 flow [2024-06-14 11:56:21,122 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} [2024-06-14 11:56:21,122 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-14 11:56:21,123 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 126 transitions, 1017 flow [2024-06-14 11:56:21,123 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) [2024-06-14 11:56:21,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:21,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:21,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:56:21,123 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)] === [2024-06-14 11:56:21,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:21,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1793224244, now seen corresponding path program 2 times [2024-06-14 11:56:21,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:21,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108446374] [2024-06-14 11:56:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:21,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:21,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:21,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108446374] [2024-06-14 11:56:21,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108446374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:21,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:21,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:56:21,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427399287] [2024-06-14 11:56:21,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:21,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:56:21,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:21,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:56:21,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:56:21,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:21,891 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) [2024-06-14 11:56:21,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:21,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:21,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:22,354 INFO L124 PetriNetUnfolderBase]: 1945/3050 cut-off events. [2024-06-14 11:56:22,354 INFO L125 PetriNetUnfolderBase]: For 112017/112023 co-relation queries the response was YES. [2024-06-14 11:56:22,365 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. [2024-06-14 11:56:22,376 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 109 selfloop transitions, 16 changer transitions 0/138 dead transitions. [2024-06-14 11:56:22,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 138 transitions, 1323 flow [2024-06-14 11:56:22,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:56:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:56:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-14 11:56:22,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2024-06-14 11:56:22,377 INFO L175 Difference]: Start difference. First operand has 115 places, 126 transitions, 1017 flow. Second operand 6 states and 115 transitions. [2024-06-14 11:56:22,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 138 transitions, 1323 flow [2024-06-14 11:56:22,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 138 transitions, 1173 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 11:56:22,422 INFO L231 Difference]: Finished difference. Result has 113 places, 129 transitions, 945 flow [2024-06-14 11:56:22,422 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} [2024-06-14 11:56:22,423 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-14 11:56:22,423 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 129 transitions, 945 flow [2024-06-14 11:56:22,423 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) [2024-06-14 11:56:22,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:22,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:22,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:56:22,423 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)] === [2024-06-14 11:56:22,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:22,424 INFO L85 PathProgramCache]: Analyzing trace with hash -664727528, now seen corresponding path program 1 times [2024-06-14 11:56:22,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:22,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007591559] [2024-06-14 11:56:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:22,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:23,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:23,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007591559] [2024-06-14 11:56:23,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007591559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:23,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:23,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:56:23,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810874350] [2024-06-14 11:56:23,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:23,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:56:23,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:23,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:56:23,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:56:23,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:56:23,213 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) [2024-06-14 11:56:23,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:23,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:56:23,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:23,681 INFO L124 PetriNetUnfolderBase]: 1721/2808 cut-off events. [2024-06-14 11:56:23,682 INFO L125 PetriNetUnfolderBase]: For 100285/100285 co-relation queries the response was YES. [2024-06-14 11:56:23,689 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. [2024-06-14 11:56:23,697 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 119 selfloop transitions, 11 changer transitions 0/144 dead transitions. [2024-06-14 11:56:23,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 144 transitions, 1265 flow [2024-06-14 11:56:23,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:56:23,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:56:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-14 11:56:23,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-14 11:56:23,705 INFO L175 Difference]: Start difference. First operand has 113 places, 129 transitions, 945 flow. Second operand 6 states and 121 transitions. [2024-06-14 11:56:23,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 144 transitions, 1265 flow [2024-06-14 11:56:23,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 144 transitions, 1209 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 11:56:23,764 INFO L231 Difference]: Finished difference. Result has 115 places, 132 transitions, 953 flow [2024-06-14 11:56:23,764 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} [2024-06-14 11:56:23,765 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-14 11:56:23,765 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 132 transitions, 953 flow [2024-06-14 11:56:23,765 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) [2024-06-14 11:56:23,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:23,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:23,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:56:23,767 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:23,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:23,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1805511769, now seen corresponding path program 1 times [2024-06-14 11:56:23,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:23,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620135339] [2024-06-14 11:56:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:23,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:25,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:25,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620135339] [2024-06-14 11:56:25,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620135339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:25,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:25,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:56:25,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108563034] [2024-06-14 11:56:25,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:25,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:56:25,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:25,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:56:25,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:56:25,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:25,144 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) [2024-06-14 11:56:25,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:25,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:25,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:25,914 INFO L124 PetriNetUnfolderBase]: 1812/2893 cut-off events. [2024-06-14 11:56:25,915 INFO L125 PetriNetUnfolderBase]: For 105447/105447 co-relation queries the response was YES. [2024-06-14 11:56:25,925 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. [2024-06-14 11:56:25,936 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 140 selfloop transitions, 19 changer transitions 0/165 dead transitions. [2024-06-14 11:56:25,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 165 transitions, 1391 flow [2024-06-14 11:56:25,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:56:25,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:56:25,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 11:56:25,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 11:56:25,937 INFO L175 Difference]: Start difference. First operand has 115 places, 132 transitions, 953 flow. Second operand 9 states and 174 transitions. [2024-06-14 11:56:25,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 165 transitions, 1391 flow [2024-06-14 11:56:25,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 165 transitions, 1349 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 11:56:25,992 INFO L231 Difference]: Finished difference. Result has 121 places, 137 transitions, 1016 flow [2024-06-14 11:56:25,992 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} [2024-06-14 11:56:25,992 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-14 11:56:25,992 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 137 transitions, 1016 flow [2024-06-14 11:56:25,992 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) [2024-06-14 11:56:25,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:25,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:25,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:56:25,993 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)] === [2024-06-14 11:56:25,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:25,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1793218292, now seen corresponding path program 2 times [2024-06-14 11:56:25,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:25,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792412476] [2024-06-14 11:56:25,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:25,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:26,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:26,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792412476] [2024-06-14 11:56:26,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792412476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:26,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:26,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:56:26,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141939840] [2024-06-14 11:56:26,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:26,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:56:26,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:26,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:56:26,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:56:26,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:56:26,839 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) [2024-06-14 11:56:26,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:26,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:56:26,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:27,237 INFO L124 PetriNetUnfolderBase]: 1710/2791 cut-off events. [2024-06-14 11:56:27,237 INFO L125 PetriNetUnfolderBase]: For 110503/110505 co-relation queries the response was YES. [2024-06-14 11:56:27,247 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. [2024-06-14 11:56:27,257 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 119 selfloop transitions, 16 changer transitions 0/149 dead transitions. [2024-06-14 11:56:27,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 149 transitions, 1346 flow [2024-06-14 11:56:27,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:56:27,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:56:27,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-14 11:56:27,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:56:27,258 INFO L175 Difference]: Start difference. First operand has 121 places, 137 transitions, 1016 flow. Second operand 6 states and 120 transitions. [2024-06-14 11:56:27,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 149 transitions, 1346 flow [2024-06-14 11:56:27,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 149 transitions, 1281 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:27,315 INFO L231 Difference]: Finished difference. Result has 121 places, 140 transitions, 1033 flow [2024-06-14 11:56:27,316 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} [2024-06-14 11:56:27,316 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-14 11:56:27,316 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 140 transitions, 1033 flow [2024-06-14 11:56:27,316 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) [2024-06-14 11:56:27,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:27,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:27,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:56:27,317 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:27,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:27,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1449672911, now seen corresponding path program 1 times [2024-06-14 11:56:27,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:27,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998439003] [2024-06-14 11:56:27,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:27,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:28,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:28,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998439003] [2024-06-14 11:56:28,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998439003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:28,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:28,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:28,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367899872] [2024-06-14 11:56:28,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:28,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:28,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:28,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:28,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:28,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:28,177 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) [2024-06-14 11:56:28,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:28,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:28,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:28,740 INFO L124 PetriNetUnfolderBase]: 2067/3179 cut-off events. [2024-06-14 11:56:28,740 INFO L125 PetriNetUnfolderBase]: For 139790/139792 co-relation queries the response was YES. [2024-06-14 11:56:28,751 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. [2024-06-14 11:56:28,760 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 130 selfloop transitions, 40 changer transitions 0/175 dead transitions. [2024-06-14 11:56:28,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 175 transitions, 1629 flow [2024-06-14 11:56:28,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:28,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 11:56:28,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-14 11:56:28,762 INFO L175 Difference]: Start difference. First operand has 121 places, 140 transitions, 1033 flow. Second operand 8 states and 161 transitions. [2024-06-14 11:56:28,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 175 transitions, 1629 flow [2024-06-14 11:56:28,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 175 transitions, 1569 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 11:56:28,820 INFO L231 Difference]: Finished difference. Result has 125 places, 144 transitions, 1120 flow [2024-06-14 11:56:28,821 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} [2024-06-14 11:56:28,821 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2024-06-14 11:56:28,821 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 144 transitions, 1120 flow [2024-06-14 11:56:28,821 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) [2024-06-14 11:56:28,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:28,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:28,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:56:28,822 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:28,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:28,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1538386541, now seen corresponding path program 2 times [2024-06-14 11:56:28,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:28,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915038715] [2024-06-14 11:56:28,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:28,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:29,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:29,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915038715] [2024-06-14 11:56:29,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915038715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:29,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:29,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:29,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265197762] [2024-06-14 11:56:29,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:29,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:29,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:29,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:29,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:29,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:29,664 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) [2024-06-14 11:56:29,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:29,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:29,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:30,283 INFO L124 PetriNetUnfolderBase]: 2084/3206 cut-off events. [2024-06-14 11:56:30,283 INFO L125 PetriNetUnfolderBase]: For 148351/148353 co-relation queries the response was YES. [2024-06-14 11:56:30,297 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. [2024-06-14 11:56:30,310 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 130 selfloop transitions, 38 changer transitions 0/173 dead transitions. [2024-06-14 11:56:30,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 173 transitions, 1556 flow [2024-06-14 11:56:30,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:30,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:30,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 11:56:30,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-14 11:56:30,312 INFO L175 Difference]: Start difference. First operand has 125 places, 144 transitions, 1120 flow. Second operand 8 states and 159 transitions. [2024-06-14 11:56:30,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 173 transitions, 1556 flow [2024-06-14 11:56:30,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 173 transitions, 1478 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 11:56:30,383 INFO L231 Difference]: Finished difference. Result has 129 places, 146 transitions, 1161 flow [2024-06-14 11:56:30,383 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} [2024-06-14 11:56:30,384 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 84 predicate places. [2024-06-14 11:56:30,384 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 146 transitions, 1161 flow [2024-06-14 11:56:30,384 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) [2024-06-14 11:56:30,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:30,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:30,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:56:30,385 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:30,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:30,385 INFO L85 PathProgramCache]: Analyzing trace with hash 678769495, now seen corresponding path program 3 times [2024-06-14 11:56:30,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:30,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005264182] [2024-06-14 11:56:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:30,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:31,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:31,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005264182] [2024-06-14 11:56:31,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005264182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:31,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:31,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:31,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764642608] [2024-06-14 11:56:31,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:31,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:31,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:31,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:31,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:31,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:31,224 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) [2024-06-14 11:56:31,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:31,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:31,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:31,911 INFO L124 PetriNetUnfolderBase]: 2101/3233 cut-off events. [2024-06-14 11:56:31,911 INFO L125 PetriNetUnfolderBase]: For 156722/156724 co-relation queries the response was YES. [2024-06-14 11:56:31,923 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. [2024-06-14 11:56:31,935 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 130 selfloop transitions, 41 changer transitions 0/176 dead transitions. [2024-06-14 11:56:31,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 176 transitions, 1601 flow [2024-06-14 11:56:31,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 11:56:31,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:56:31,937 INFO L175 Difference]: Start difference. First operand has 129 places, 146 transitions, 1161 flow. Second operand 8 states and 160 transitions. [2024-06-14 11:56:31,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 176 transitions, 1601 flow [2024-06-14 11:56:31,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 176 transitions, 1512 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:32,001 INFO L231 Difference]: Finished difference. Result has 131 places, 148 transitions, 1193 flow [2024-06-14 11:56:32,001 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} [2024-06-14 11:56:32,001 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2024-06-14 11:56:32,001 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 148 transitions, 1193 flow [2024-06-14 11:56:32,002 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) [2024-06-14 11:56:32,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:32,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:32,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:56:32,002 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)] === [2024-06-14 11:56:32,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:32,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1084324888, now seen corresponding path program 1 times [2024-06-14 11:56:32,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:32,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975395046] [2024-06-14 11:56:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:32,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:32,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:32,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975395046] [2024-06-14 11:56:32,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975395046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:32,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:32,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:32,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214833959] [2024-06-14 11:56:32,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:32,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:32,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:32,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:32,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:32,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:32,792 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) [2024-06-14 11:56:32,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:32,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:32,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:33,357 INFO L124 PetriNetUnfolderBase]: 2001/3138 cut-off events. [2024-06-14 11:56:33,357 INFO L125 PetriNetUnfolderBase]: For 164120/164122 co-relation queries the response was YES. [2024-06-14 11:56:33,370 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. [2024-06-14 11:56:33,382 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 133 selfloop transitions, 24 changer transitions 0/174 dead transitions. [2024-06-14 11:56:33,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 174 transitions, 1613 flow [2024-06-14 11:56:33,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:33,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:33,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-14 11:56:33,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-14 11:56:33,384 INFO L175 Difference]: Start difference. First operand has 131 places, 148 transitions, 1193 flow. Second operand 7 states and 145 transitions. [2024-06-14 11:56:33,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 174 transitions, 1613 flow [2024-06-14 11:56:33,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 174 transitions, 1514 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:33,450 INFO L231 Difference]: Finished difference. Result has 132 places, 152 transitions, 1207 flow [2024-06-14 11:56:33,450 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} [2024-06-14 11:56:33,451 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 87 predicate places. [2024-06-14 11:56:33,451 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 152 transitions, 1207 flow [2024-06-14 11:56:33,451 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) [2024-06-14 11:56:33,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:33,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:33,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:56:33,451 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:33,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:33,452 INFO L85 PathProgramCache]: Analyzing trace with hash 817297645, now seen corresponding path program 4 times [2024-06-14 11:56:33,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:33,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618225358] [2024-06-14 11:56:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:33,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:34,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:34,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618225358] [2024-06-14 11:56:34,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618225358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:34,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:34,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:34,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830838766] [2024-06-14 11:56:34,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:34,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:34,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:34,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:34,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:34,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:34,346 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) [2024-06-14 11:56:34,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:34,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:34,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:35,119 INFO L124 PetriNetUnfolderBase]: 2128/3276 cut-off events. [2024-06-14 11:56:35,119 INFO L125 PetriNetUnfolderBase]: For 173763/173765 co-relation queries the response was YES. [2024-06-14 11:56:35,133 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. [2024-06-14 11:56:35,145 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 137 selfloop transitions, 45 changer transitions 0/187 dead transitions. [2024-06-14 11:56:35,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 187 transitions, 1823 flow [2024-06-14 11:56:35,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:35,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:35,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-14 11:56:35,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-14 11:56:35,147 INFO L175 Difference]: Start difference. First operand has 132 places, 152 transitions, 1207 flow. Second operand 8 states and 166 transitions. [2024-06-14 11:56:35,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 187 transitions, 1823 flow [2024-06-14 11:56:35,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 187 transitions, 1738 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 11:56:35,243 INFO L231 Difference]: Finished difference. Result has 135 places, 154 transitions, 1251 flow [2024-06-14 11:56:35,243 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} [2024-06-14 11:56:35,243 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 90 predicate places. [2024-06-14 11:56:35,243 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 154 transitions, 1251 flow [2024-06-14 11:56:35,243 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) [2024-06-14 11:56:35,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:35,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:35,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:56:35,244 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:35,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:35,244 INFO L85 PathProgramCache]: Analyzing trace with hash 361389587, now seen corresponding path program 5 times [2024-06-14 11:56:35,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:35,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394517634] [2024-06-14 11:56:35,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:35,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:36,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:36,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394517634] [2024-06-14 11:56:36,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394517634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:36,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:36,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:36,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398432265] [2024-06-14 11:56:36,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:36,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:36,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:36,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:36,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:36,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:36,106 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) [2024-06-14 11:56:36,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:36,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:36,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:36,856 INFO L124 PetriNetUnfolderBase]: 2145/3303 cut-off events. [2024-06-14 11:56:36,857 INFO L125 PetriNetUnfolderBase]: For 183246/183248 co-relation queries the response was YES. [2024-06-14 11:56:36,867 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. [2024-06-14 11:56:36,877 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 140 selfloop transitions, 41 changer transitions 0/186 dead transitions. [2024-06-14 11:56:36,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 186 transitions, 1725 flow [2024-06-14 11:56:36,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 11:56:36,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-14 11:56:36,883 INFO L175 Difference]: Start difference. First operand has 135 places, 154 transitions, 1251 flow. Second operand 8 states and 162 transitions. [2024-06-14 11:56:36,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 186 transitions, 1725 flow [2024-06-14 11:56:36,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 186 transitions, 1602 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:36,975 INFO L231 Difference]: Finished difference. Result has 137 places, 156 transitions, 1257 flow [2024-06-14 11:56:36,975 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} [2024-06-14 11:56:36,984 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-14 11:56:36,985 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 156 transitions, 1257 flow [2024-06-14 11:56:36,985 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) [2024-06-14 11:56:36,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:36,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:36,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:56:36,985 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:36,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:36,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1373470829, now seen corresponding path program 6 times [2024-06-14 11:56:36,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:36,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030373099] [2024-06-14 11:56:36,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:36,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:37,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:37,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030373099] [2024-06-14 11:56:37,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030373099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:37,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:37,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:37,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776563326] [2024-06-14 11:56:37,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:37,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:37,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:37,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:37,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:37,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:37,916 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) [2024-06-14 11:56:37,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:37,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:37,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:38,688 INFO L124 PetriNetUnfolderBase]: 2162/3330 cut-off events. [2024-06-14 11:56:38,688 INFO L125 PetriNetUnfolderBase]: For 192370/192372 co-relation queries the response was YES. [2024-06-14 11:56:38,699 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. [2024-06-14 11:56:38,709 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 142 selfloop transitions, 38 changer transitions 0/185 dead transitions. [2024-06-14 11:56:38,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 185 transitions, 1721 flow [2024-06-14 11:56:38,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:38,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 11:56:38,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-14 11:56:38,710 INFO L175 Difference]: Start difference. First operand has 137 places, 156 transitions, 1257 flow. Second operand 8 states and 158 transitions. [2024-06-14 11:56:38,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 185 transitions, 1721 flow [2024-06-14 11:56:38,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 185 transitions, 1618 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:38,838 INFO L231 Difference]: Finished difference. Result has 139 places, 158 transitions, 1277 flow [2024-06-14 11:56:38,838 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} [2024-06-14 11:56:38,838 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-14 11:56:38,839 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 158 transitions, 1277 flow [2024-06-14 11:56:38,839 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) [2024-06-14 11:56:38,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:38,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:38,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:56:38,839 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)] === [2024-06-14 11:56:38,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:38,840 INFO L85 PathProgramCache]: Analyzing trace with hash -168682614, now seen corresponding path program 1 times [2024-06-14 11:56:38,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:38,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723581533] [2024-06-14 11:56:38,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:38,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:39,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:39,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723581533] [2024-06-14 11:56:39,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723581533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:39,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:39,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:39,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760862681] [2024-06-14 11:56:39,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:39,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:39,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:39,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:39,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:39,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:40,000 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) [2024-06-14 11:56:40,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:40,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:40,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:40,531 INFO L124 PetriNetUnfolderBase]: 2042/3210 cut-off events. [2024-06-14 11:56:40,532 INFO L125 PetriNetUnfolderBase]: For 199212/199212 co-relation queries the response was YES. [2024-06-14 11:56:40,544 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. [2024-06-14 11:56:40,554 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 143 selfloop transitions, 14 changer transitions 0/177 dead transitions. [2024-06-14 11:56:40,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 177 transitions, 1667 flow [2024-06-14 11:56:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:40,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 11:56:40,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-14 11:56:40,563 INFO L175 Difference]: Start difference. First operand has 139 places, 158 transitions, 1277 flow. Second operand 7 states and 134 transitions. [2024-06-14 11:56:40,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 177 transitions, 1667 flow [2024-06-14 11:56:40,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 177 transitions, 1566 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:40,658 INFO L231 Difference]: Finished difference. Result has 140 places, 161 transitions, 1252 flow [2024-06-14 11:56:40,659 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} [2024-06-14 11:56:40,660 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-14 11:56:40,660 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 161 transitions, 1252 flow [2024-06-14 11:56:40,664 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) [2024-06-14 11:56:40,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:40,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:40,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:56:40,665 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)] === [2024-06-14 11:56:40,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:40,665 INFO L85 PathProgramCache]: Analyzing trace with hash 499697526, now seen corresponding path program 2 times [2024-06-14 11:56:40,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:40,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791467245] [2024-06-14 11:56:40,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:40,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:41,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:41,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791467245] [2024-06-14 11:56:41,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791467245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:41,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:41,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:41,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458542396] [2024-06-14 11:56:41,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:41,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:41,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:41,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:41,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:41,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:41,624 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) [2024-06-14 11:56:41,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:41,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:41,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:42,187 INFO L124 PetriNetUnfolderBase]: 2070/3257 cut-off events. [2024-06-14 11:56:42,187 INFO L125 PetriNetUnfolderBase]: For 209993/209995 co-relation queries the response was YES. [2024-06-14 11:56:42,202 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. [2024-06-14 11:56:42,214 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 137 selfloop transitions, 29 changer transitions 0/186 dead transitions. [2024-06-14 11:56:42,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 186 transitions, 1824 flow [2024-06-14 11:56:42,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:42,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:42,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-14 11:56:42,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-14 11:56:42,216 INFO L175 Difference]: Start difference. First operand has 140 places, 161 transitions, 1252 flow. Second operand 7 states and 141 transitions. [2024-06-14 11:56:42,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 186 transitions, 1824 flow [2024-06-14 11:56:42,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 186 transitions, 1770 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 11:56:42,335 INFO L231 Difference]: Finished difference. Result has 143 places, 169 transitions, 1402 flow [2024-06-14 11:56:42,336 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} [2024-06-14 11:56:42,336 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 98 predicate places. [2024-06-14 11:56:42,336 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 169 transitions, 1402 flow [2024-06-14 11:56:42,336 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) [2024-06-14 11:56:42,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:42,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:42,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:56:42,337 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:42,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:42,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1117233217, now seen corresponding path program 7 times [2024-06-14 11:56:42,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:42,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267392172] [2024-06-14 11:56:42,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:42,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:43,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:43,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267392172] [2024-06-14 11:56:43,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267392172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:43,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:43,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:43,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259625634] [2024-06-14 11:56:43,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:43,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:43,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:43,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:43,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:43,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:43,258 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) [2024-06-14 11:56:43,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:43,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:43,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:44,046 INFO L124 PetriNetUnfolderBase]: 2187/3371 cut-off events. [2024-06-14 11:56:44,046 INFO L125 PetriNetUnfolderBase]: For 220985/220991 co-relation queries the response was YES. [2024-06-14 11:56:44,061 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. [2024-06-14 11:56:44,073 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 152 selfloop transitions, 36 changer transitions 0/193 dead transitions. [2024-06-14 11:56:44,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 193 transitions, 1838 flow [2024-06-14 11:56:44,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:44,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:44,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 11:56:44,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 11:56:44,075 INFO L175 Difference]: Start difference. First operand has 143 places, 169 transitions, 1402 flow. Second operand 8 states and 154 transitions. [2024-06-14 11:56:44,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 193 transitions, 1838 flow [2024-06-14 11:56:44,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 193 transitions, 1735 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-14 11:56:44,199 INFO L231 Difference]: Finished difference. Result has 148 places, 169 transitions, 1378 flow [2024-06-14 11:56:44,199 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} [2024-06-14 11:56:44,200 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 103 predicate places. [2024-06-14 11:56:44,200 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 169 transitions, 1378 flow [2024-06-14 11:56:44,200 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) [2024-06-14 11:56:44,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:44,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:44,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:56:44,200 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:44,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:44,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1098146982, now seen corresponding path program 2 times [2024-06-14 11:56:44,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:44,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516602100] [2024-06-14 11:56:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:44,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:45,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:45,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516602100] [2024-06-14 11:56:45,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516602100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:45,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:45,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:45,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199527360] [2024-06-14 11:56:45,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:45,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:45,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:45,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:45,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:45,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:45,288 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) [2024-06-14 11:56:45,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:45,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:45,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:45,842 INFO L124 PetriNetUnfolderBase]: 2067/3253 cut-off events. [2024-06-14 11:56:45,842 INFO L125 PetriNetUnfolderBase]: For 227913/227919 co-relation queries the response was YES. [2024-06-14 11:56:45,856 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. [2024-06-14 11:56:45,867 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 143 selfloop transitions, 19 changer transitions 0/182 dead transitions. [2024-06-14 11:56:45,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 182 transitions, 1772 flow [2024-06-14 11:56:45,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:45,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 11:56:45,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-06-14 11:56:45,871 INFO L175 Difference]: Start difference. First operand has 148 places, 169 transitions, 1378 flow. Second operand 7 states and 130 transitions. [2024-06-14 11:56:45,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 182 transitions, 1772 flow [2024-06-14 11:56:45,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 182 transitions, 1678 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 11:56:45,969 INFO L231 Difference]: Finished difference. Result has 148 places, 172 transitions, 1380 flow [2024-06-14 11:56:45,970 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} [2024-06-14 11:56:45,971 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 103 predicate places. [2024-06-14 11:56:45,971 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 172 transitions, 1380 flow [2024-06-14 11:56:45,972 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) [2024-06-14 11:56:45,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:45,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:45,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:56:45,973 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)] === [2024-06-14 11:56:45,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:45,973 INFO L85 PathProgramCache]: Analyzing trace with hash 244623832, now seen corresponding path program 3 times [2024-06-14 11:56:45,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:45,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446027464] [2024-06-14 11:56:45,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:45,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:45,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:46,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:46,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446027464] [2024-06-14 11:56:46,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446027464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:46,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:46,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:46,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972605653] [2024-06-14 11:56:46,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:46,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:46,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:46,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:46,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:46,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:46,998 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) [2024-06-14 11:56:46,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:46,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:46,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:47,540 INFO L124 PetriNetUnfolderBase]: 2071/3260 cut-off events. [2024-06-14 11:56:47,540 INFO L125 PetriNetUnfolderBase]: For 236903/236905 co-relation queries the response was YES. [2024-06-14 11:56:47,556 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. [2024-06-14 11:56:47,569 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 131 selfloop transitions, 44 changer transitions 0/195 dead transitions. [2024-06-14 11:56:47,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 195 transitions, 2098 flow [2024-06-14 11:56:47,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:47,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:47,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 11:56:47,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 11:56:47,571 INFO L175 Difference]: Start difference. First operand has 148 places, 172 transitions, 1380 flow. Second operand 8 states and 153 transitions. [2024-06-14 11:56:47,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 195 transitions, 2098 flow [2024-06-14 11:56:47,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 195 transitions, 2022 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 11:56:47,729 INFO L231 Difference]: Finished difference. Result has 153 places, 182 transitions, 1574 flow [2024-06-14 11:56:47,729 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} [2024-06-14 11:56:47,729 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 108 predicate places. [2024-06-14 11:56:47,729 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 182 transitions, 1574 flow [2024-06-14 11:56:47,730 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) [2024-06-14 11:56:47,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:47,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:47,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:56:47,730 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)] === [2024-06-14 11:56:47,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:47,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1786193000, now seen corresponding path program 3 times [2024-06-14 11:56:47,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:47,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235994316] [2024-06-14 11:56:47,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:47,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:48,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:48,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235994316] [2024-06-14 11:56:48,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235994316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:48,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:48,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:48,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867811887] [2024-06-14 11:56:48,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:48,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:48,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:48,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:48,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:48,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:48,926 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) [2024-06-14 11:56:48,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:48,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:48,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:49,552 INFO L124 PetriNetUnfolderBase]: 2081/3259 cut-off events. [2024-06-14 11:56:49,552 INFO L125 PetriNetUnfolderBase]: For 248143/248149 co-relation queries the response was YES. [2024-06-14 11:56:49,565 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. [2024-06-14 11:56:49,577 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 151 selfloop transitions, 27 changer transitions 0/198 dead transitions. [2024-06-14 11:56:49,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 198 transitions, 2027 flow [2024-06-14 11:56:49,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 11:56:49,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-14 11:56:49,579 INFO L175 Difference]: Start difference. First operand has 153 places, 182 transitions, 1574 flow. Second operand 7 states and 131 transitions. [2024-06-14 11:56:49,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 198 transitions, 2027 flow [2024-06-14 11:56:49,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 198 transitions, 1893 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-14 11:56:49,720 INFO L231 Difference]: Finished difference. Result has 158 places, 188 transitions, 1592 flow [2024-06-14 11:56:49,720 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} [2024-06-14 11:56:49,720 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2024-06-14 11:56:49,720 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 188 transitions, 1592 flow [2024-06-14 11:56:49,721 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) [2024-06-14 11:56:49,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:49,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:49,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 11:56:49,721 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)] === [2024-06-14 11:56:49,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:49,721 INFO L85 PathProgramCache]: Analyzing trace with hash 8453680, now seen corresponding path program 1 times [2024-06-14 11:56:49,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:49,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616955133] [2024-06-14 11:56:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:49,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:50,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:50,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616955133] [2024-06-14 11:56:50,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616955133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:50,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:50,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:50,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997217132] [2024-06-14 11:56:50,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:50,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:50,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:50,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:50,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:50,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:50,529 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) [2024-06-14 11:56:50,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:50,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:50,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:51,180 INFO L124 PetriNetUnfolderBase]: 2059/3237 cut-off events. [2024-06-14 11:56:51,181 INFO L125 PetriNetUnfolderBase]: For 259202/259202 co-relation queries the response was YES. [2024-06-14 11:56:51,197 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. [2024-06-14 11:56:51,213 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 182 selfloop transitions, 16 changer transitions 0/208 dead transitions. [2024-06-14 11:56:51,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 208 transitions, 2082 flow [2024-06-14 11:56:51,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:51,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:51,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 11:56:51,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 11:56:51,214 INFO L175 Difference]: Start difference. First operand has 158 places, 188 transitions, 1592 flow. Second operand 8 states and 146 transitions. [2024-06-14 11:56:51,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 208 transitions, 2082 flow [2024-06-14 11:56:51,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 208 transitions, 2014 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-14 11:56:51,390 INFO L231 Difference]: Finished difference. Result has 164 places, 193 transitions, 1629 flow [2024-06-14 11:56:51,390 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} [2024-06-14 11:56:51,391 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 119 predicate places. [2024-06-14 11:56:51,392 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 193 transitions, 1629 flow [2024-06-14 11:56:51,392 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) [2024-06-14 11:56:51,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:51,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:51,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 11:56:51,392 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)] === [2024-06-14 11:56:51,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:51,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2142870976, now seen corresponding path program 2 times [2024-06-14 11:56:51,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:51,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338640822] [2024-06-14 11:56:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:51,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:52,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:52,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338640822] [2024-06-14 11:56:52,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338640822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:52,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:52,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:52,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775778436] [2024-06-14 11:56:52,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:52,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:52,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:52,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:52,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:52,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:52,337 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) [2024-06-14 11:56:52,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:52,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:52,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:52,952 INFO L124 PetriNetUnfolderBase]: 2064/3244 cut-off events. [2024-06-14 11:56:52,952 INFO L125 PetriNetUnfolderBase]: For 269219/269219 co-relation queries the response was YES. [2024-06-14 11:56:52,966 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. [2024-06-14 11:56:52,978 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 178 selfloop transitions, 20 changer transitions 0/208 dead transitions. [2024-06-14 11:56:52,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 208 transitions, 2105 flow [2024-06-14 11:56:52,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:52,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:52,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 11:56:52,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:56:52,979 INFO L175 Difference]: Start difference. First operand has 164 places, 193 transitions, 1629 flow. Second operand 7 states and 133 transitions. [2024-06-14 11:56:52,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 208 transitions, 2105 flow [2024-06-14 11:56:53,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 208 transitions, 2041 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 11:56:53,128 INFO L231 Difference]: Finished difference. Result has 166 places, 196 transitions, 1667 flow [2024-06-14 11:56:53,128 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} [2024-06-14 11:56:53,128 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 121 predicate places. [2024-06-14 11:56:53,128 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 196 transitions, 1667 flow [2024-06-14 11:56:53,128 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) [2024-06-14 11:56:53,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:53,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:53,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 11:56:53,129 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)] === [2024-06-14 11:56:53,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:53,129 INFO L85 PathProgramCache]: Analyzing trace with hash 868284094, now seen corresponding path program 1 times [2024-06-14 11:56:53,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:53,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187258608] [2024-06-14 11:56:53,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:53,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:54,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:54,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187258608] [2024-06-14 11:56:54,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187258608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:54,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:54,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:54,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720309653] [2024-06-14 11:56:54,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:54,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:54,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:54,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:54,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:54,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:56:54,213 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) [2024-06-14 11:56:54,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:54,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:56:54,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:54,784 INFO L124 PetriNetUnfolderBase]: 1982/3168 cut-off events. [2024-06-14 11:56:54,784 INFO L125 PetriNetUnfolderBase]: For 282179/282179 co-relation queries the response was YES. [2024-06-14 11:56:54,807 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. [2024-06-14 11:56:54,819 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 170 selfloop transitions, 15 changer transitions 0/212 dead transitions. [2024-06-14 11:56:54,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 212 transitions, 2113 flow [2024-06-14 11:56:54,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:54,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 11:56:54,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-14 11:56:54,821 INFO L175 Difference]: Start difference. First operand has 166 places, 196 transitions, 1667 flow. Second operand 7 states and 138 transitions. [2024-06-14 11:56:54,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 212 transitions, 2113 flow [2024-06-14 11:56:55,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 212 transitions, 2033 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 11:56:55,025 INFO L231 Difference]: Finished difference. Result has 168 places, 199 transitions, 1673 flow [2024-06-14 11:56:55,025 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} [2024-06-14 11:56:55,026 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 123 predicate places. [2024-06-14 11:56:55,026 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 199 transitions, 1673 flow [2024-06-14 11:56:55,026 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) [2024-06-14 11:56:55,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:55,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:55,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 11:56:55,026 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)] === [2024-06-14 11:56:55,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:55,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1098331494, now seen corresponding path program 2 times [2024-06-14 11:56:55,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:55,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749362412] [2024-06-14 11:56:55,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:55,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:56,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:56,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749362412] [2024-06-14 11:56:56,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749362412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:56,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:56,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:56,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245595425] [2024-06-14 11:56:56,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:56,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:56,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:56,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:56,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:56,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:56:56,332 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) [2024-06-14 11:56:56,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:56,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:56:56,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:56,889 INFO L124 PetriNetUnfolderBase]: 1992/3185 cut-off events. [2024-06-14 11:56:56,890 INFO L125 PetriNetUnfolderBase]: For 292405/292407 co-relation queries the response was YES. [2024-06-14 11:56:56,905 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. [2024-06-14 11:56:56,918 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 165 selfloop transitions, 20 changer transitions 0/212 dead transitions. [2024-06-14 11:56:56,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 212 transitions, 2117 flow [2024-06-14 11:56:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:56,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:56,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 11:56:56,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-14 11:56:56,919 INFO L175 Difference]: Start difference. First operand has 168 places, 199 transitions, 1673 flow. Second operand 7 states and 137 transitions. [2024-06-14 11:56:56,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 212 transitions, 2117 flow [2024-06-14 11:56:57,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 212 transitions, 2053 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 11:56:57,151 INFO L231 Difference]: Finished difference. Result has 170 places, 202 transitions, 1711 flow [2024-06-14 11:56:57,152 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} [2024-06-14 11:56:57,152 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 125 predicate places. [2024-06-14 11:56:57,152 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 202 transitions, 1711 flow [2024-06-14 11:56:57,152 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) [2024-06-14 11:56:57,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:57,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:57,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 11:56:57,153 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)] === [2024-06-14 11:56:57,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:57,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1098331246, now seen corresponding path program 3 times [2024-06-14 11:56:57,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:57,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524245827] [2024-06-14 11:56:57,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:57,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:58,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:58,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524245827] [2024-06-14 11:56:58,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524245827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:58,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:58,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:58,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210511530] [2024-06-14 11:56:58,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:58,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:58,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:58,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:58,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:58,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:58,147 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) [2024-06-14 11:56:58,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:58,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:58,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:58,766 INFO L124 PetriNetUnfolderBase]: 2081/3274 cut-off events. [2024-06-14 11:56:58,766 INFO L125 PetriNetUnfolderBase]: For 299103/299105 co-relation queries the response was YES. [2024-06-14 11:56:58,783 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. [2024-06-14 11:56:58,796 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 177 selfloop transitions, 27 changer transitions 0/214 dead transitions. [2024-06-14 11:56:58,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 214 transitions, 2201 flow [2024-06-14 11:56:58,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:58,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 11:56:58,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 11:56:58,798 INFO L175 Difference]: Start difference. First operand has 170 places, 202 transitions, 1711 flow. Second operand 7 states and 132 transitions. [2024-06-14 11:56:58,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 214 transitions, 2201 flow [2024-06-14 11:56:59,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 214 transitions, 2121 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 11:56:59,017 INFO L231 Difference]: Finished difference. Result has 172 places, 205 transitions, 1757 flow [2024-06-14 11:56:59,017 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} [2024-06-14 11:56:59,017 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 127 predicate places. [2024-06-14 11:56:59,018 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 205 transitions, 1757 flow [2024-06-14 11:56:59,018 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) [2024-06-14 11:56:59,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:59,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:59,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 11:56:59,018 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)] === [2024-06-14 11:56:59,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:59,019 INFO L85 PathProgramCache]: Analyzing trace with hash 874779214, now seen corresponding path program 3 times [2024-06-14 11:56:59,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:59,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235453217] [2024-06-14 11:56:59,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:59,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:00,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:00,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235453217] [2024-06-14 11:57:00,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235453217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:00,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:00,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:57:00,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223579397] [2024-06-14 11:57:00,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:00,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:57:00,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:00,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:57:00,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:57:00,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:57:00,221 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) [2024-06-14 11:57:00,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:00,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:57:00,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:00,842 INFO L124 PetriNetUnfolderBase]: 1980/3169 cut-off events. [2024-06-14 11:57:00,842 INFO L125 PetriNetUnfolderBase]: For 307299/307301 co-relation queries the response was YES. [2024-06-14 11:57:00,860 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. [2024-06-14 11:57:00,876 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 161 selfloop transitions, 30 changer transitions 0/219 dead transitions. [2024-06-14 11:57:00,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 219 transitions, 2223 flow [2024-06-14 11:57:00,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:57:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:57:00,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 11:57:00,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-14 11:57:00,878 INFO L175 Difference]: Start difference. First operand has 172 places, 205 transitions, 1757 flow. Second operand 7 states and 139 transitions. [2024-06-14 11:57:00,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 219 transitions, 2223 flow [2024-06-14 11:57:01,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 219 transitions, 2119 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:01,159 INFO L231 Difference]: Finished difference. Result has 174 places, 208 transitions, 1784 flow [2024-06-14 11:57:01,159 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} [2024-06-14 11:57:01,159 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 129 predicate places. [2024-06-14 11:57:01,160 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 208 transitions, 1784 flow [2024-06-14 11:57:01,160 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) [2024-06-14 11:57:01,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:01,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:01,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 11:57:01,160 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)] === [2024-06-14 11:57:01,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:01,161 INFO L85 PathProgramCache]: Analyzing trace with hash 445521030, now seen corresponding path program 1 times [2024-06-14 11:57:01,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:01,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668556443] [2024-06-14 11:57:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:01,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:02,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:02,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668556443] [2024-06-14 11:57:02,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668556443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:02,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:02,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:02,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809140327] [2024-06-14 11:57:02,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:02,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:02,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:02,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:02,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:02,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:02,161 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) [2024-06-14 11:57:02,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:02,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:02,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:03,140 INFO L124 PetriNetUnfolderBase]: 2313/3573 cut-off events. [2024-06-14 11:57:03,140 INFO L125 PetriNetUnfolderBase]: For 342463/342465 co-relation queries the response was YES. [2024-06-14 11:57:03,159 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. [2024-06-14 11:57:03,232 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 173 selfloop transitions, 67 changer transitions 0/245 dead transitions. [2024-06-14 11:57:03,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 245 transitions, 2418 flow [2024-06-14 11:57:03,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:03,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:03,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-14 11:57:03,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-14 11:57:03,235 INFO L175 Difference]: Start difference. First operand has 174 places, 208 transitions, 1784 flow. Second operand 9 states and 186 transitions. [2024-06-14 11:57:03,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 245 transitions, 2418 flow [2024-06-14 11:57:03,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 245 transitions, 2311 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:03,445 INFO L231 Difference]: Finished difference. Result has 178 places, 210 transitions, 1871 flow [2024-06-14 11:57:03,445 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} [2024-06-14 11:57:03,446 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 133 predicate places. [2024-06-14 11:57:03,446 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 210 transitions, 1871 flow [2024-06-14 11:57:03,446 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) [2024-06-14 11:57:03,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:03,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:03,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 11:57:03,447 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)] === [2024-06-14 11:57:03,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:03,448 INFO L85 PathProgramCache]: Analyzing trace with hash -807488480, now seen corresponding path program 2 times [2024-06-14 11:57:03,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:03,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151741132] [2024-06-14 11:57:03,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:03,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:04,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:04,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151741132] [2024-06-14 11:57:04,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151741132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:04,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:04,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:04,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382637773] [2024-06-14 11:57:04,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:04,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:04,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:04,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:04,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:04,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:04,391 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) [2024-06-14 11:57:04,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:04,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:04,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:05,327 INFO L124 PetriNetUnfolderBase]: 2371/3681 cut-off events. [2024-06-14 11:57:05,327 INFO L125 PetriNetUnfolderBase]: For 348517/348519 co-relation queries the response was YES. [2024-06-14 11:57:05,347 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. [2024-06-14 11:57:05,361 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 176 selfloop transitions, 69 changer transitions 0/250 dead transitions. [2024-06-14 11:57:05,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 250 transitions, 2507 flow [2024-06-14 11:57:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 11:57:05,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-14 11:57:05,363 INFO L175 Difference]: Start difference. First operand has 178 places, 210 transitions, 1871 flow. Second operand 9 states and 189 transitions. [2024-06-14 11:57:05,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 250 transitions, 2507 flow [2024-06-14 11:57:05,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 250 transitions, 2341 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 11:57:05,581 INFO L231 Difference]: Finished difference. Result has 180 places, 211 transitions, 1877 flow [2024-06-14 11:57:05,581 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} [2024-06-14 11:57:05,581 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 135 predicate places. [2024-06-14 11:57:05,581 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 211 transitions, 1877 flow [2024-06-14 11:57:05,581 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) [2024-06-14 11:57:05,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:05,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:05,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 11:57:05,582 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)] === [2024-06-14 11:57:05,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:05,582 INFO L85 PathProgramCache]: Analyzing trace with hash 2048280616, now seen corresponding path program 3 times [2024-06-14 11:57:05,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:05,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616037619] [2024-06-14 11:57:05,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:05,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:05,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:06,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:06,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616037619] [2024-06-14 11:57:06,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616037619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:06,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:06,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:06,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545860377] [2024-06-14 11:57:06,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:06,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:06,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:06,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:06,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:06,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:06,455 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) [2024-06-14 11:57:06,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:06,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:06,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:07,269 INFO L124 PetriNetUnfolderBase]: 2429/3789 cut-off events. [2024-06-14 11:57:07,270 INFO L125 PetriNetUnfolderBase]: For 362191/362193 co-relation queries the response was YES. [2024-06-14 11:57:07,300 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. [2024-06-14 11:57:07,315 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 175 selfloop transitions, 72 changer transitions 0/252 dead transitions. [2024-06-14 11:57:07,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 252 transitions, 2521 flow [2024-06-14 11:57:07,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:07,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:07,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-14 11:57:07,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-14 11:57:07,317 INFO L175 Difference]: Start difference. First operand has 180 places, 211 transitions, 1877 flow. Second operand 9 states and 190 transitions. [2024-06-14 11:57:07,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 252 transitions, 2521 flow [2024-06-14 11:57:07,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 252 transitions, 2365 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 11:57:07,547 INFO L231 Difference]: Finished difference. Result has 182 places, 212 transitions, 1901 flow [2024-06-14 11:57:07,547 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} [2024-06-14 11:57:07,547 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 137 predicate places. [2024-06-14 11:57:07,547 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 212 transitions, 1901 flow [2024-06-14 11:57:07,547 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) [2024-06-14 11:57:07,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:07,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:07,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 11:57:07,548 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)] === [2024-06-14 11:57:07,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:07,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1990188166, now seen corresponding path program 4 times [2024-06-14 11:57:07,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:07,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288580247] [2024-06-14 11:57:07,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:07,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:08,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:08,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288580247] [2024-06-14 11:57:08,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288580247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:08,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:08,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:08,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261361620] [2024-06-14 11:57:08,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:08,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:08,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:08,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:08,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:08,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:08,455 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) [2024-06-14 11:57:08,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:08,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:08,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:09,324 INFO L124 PetriNetUnfolderBase]: 2573/4049 cut-off events. [2024-06-14 11:57:09,325 INFO L125 PetriNetUnfolderBase]: For 394702/394704 co-relation queries the response was YES. [2024-06-14 11:57:09,347 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. [2024-06-14 11:57:09,362 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 176 selfloop transitions, 76 changer transitions 0/257 dead transitions. [2024-06-14 11:57:09,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 257 transitions, 2803 flow [2024-06-14 11:57:09,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:09,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:09,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 11:57:09,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-14 11:57:09,376 INFO L175 Difference]: Start difference. First operand has 182 places, 212 transitions, 1901 flow. Second operand 9 states and 189 transitions. [2024-06-14 11:57:09,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 257 transitions, 2803 flow [2024-06-14 11:57:09,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 257 transitions, 2639 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 11:57:09,684 INFO L231 Difference]: Finished difference. Result has 184 places, 214 transitions, 1957 flow [2024-06-14 11:57:09,685 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} [2024-06-14 11:57:09,685 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 139 predicate places. [2024-06-14 11:57:09,685 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 214 transitions, 1957 flow [2024-06-14 11:57:09,685 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) [2024-06-14 11:57:09,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:09,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:09,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 11:57:09,686 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:09,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:09,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1700344446, now seen corresponding path program 1 times [2024-06-14 11:57:09,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:09,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753725744] [2024-06-14 11:57:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:09,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:10,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:10,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753725744] [2024-06-14 11:57:10,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753725744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:10,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:10,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:10,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693606703] [2024-06-14 11:57:10,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:10,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:10,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:10,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:10,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:10,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:57:10,932 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) [2024-06-14 11:57:10,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:10,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:57:10,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:11,671 INFO L124 PetriNetUnfolderBase]: 2434/3905 cut-off events. [2024-06-14 11:57:11,671 INFO L125 PetriNetUnfolderBase]: For 390976/390978 co-relation queries the response was YES. [2024-06-14 11:57:11,693 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. [2024-06-14 11:57:11,708 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 186 selfloop transitions, 30 changer transitions 0/239 dead transitions. [2024-06-14 11:57:11,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 239 transitions, 2520 flow [2024-06-14 11:57:11,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:11,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:11,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 11:57:11,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-14 11:57:11,709 INFO L175 Difference]: Start difference. First operand has 184 places, 214 transitions, 1957 flow. Second operand 8 states and 161 transitions. [2024-06-14 11:57:11,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 239 transitions, 2520 flow [2024-06-14 11:57:11,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 239 transitions, 2425 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:11,900 INFO L231 Difference]: Finished difference. Result has 187 places, 218 transitions, 2009 flow [2024-06-14 11:57:11,901 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} [2024-06-14 11:57:11,901 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 142 predicate places. [2024-06-14 11:57:11,901 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 218 transitions, 2009 flow [2024-06-14 11:57:11,901 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) [2024-06-14 11:57:11,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:11,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:11,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 11:57:11,902 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)] === [2024-06-14 11:57:11,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:11,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1681939126, now seen corresponding path program 5 times [2024-06-14 11:57:11,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:11,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281856157] [2024-06-14 11:57:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:11,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:12,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:12,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281856157] [2024-06-14 11:57:12,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281856157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:12,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:12,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:12,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880218948] [2024-06-14 11:57:12,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:12,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:12,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:12,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:12,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:12,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:12,890 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) [2024-06-14 11:57:12,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:12,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:12,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:14,050 INFO L124 PetriNetUnfolderBase]: 2702/4286 cut-off events. [2024-06-14 11:57:14,051 INFO L125 PetriNetUnfolderBase]: For 436058/436060 co-relation queries the response was YES. [2024-06-14 11:57:14,074 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. [2024-06-14 11:57:14,091 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 181 selfloop transitions, 79 changer transitions 0/265 dead transitions. [2024-06-14 11:57:14,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 265 transitions, 2928 flow [2024-06-14 11:57:14,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 11:57:14,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-14 11:57:14,092 INFO L175 Difference]: Start difference. First operand has 187 places, 218 transitions, 2009 flow. Second operand 9 states and 195 transitions. [2024-06-14 11:57:14,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 265 transitions, 2928 flow [2024-06-14 11:57:14,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 265 transitions, 2809 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:14,376 INFO L231 Difference]: Finished difference. Result has 190 places, 220 transitions, 2120 flow [2024-06-14 11:57:14,376 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} [2024-06-14 11:57:14,376 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 145 predicate places. [2024-06-14 11:57:14,377 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 220 transitions, 2120 flow [2024-06-14 11:57:14,377 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) [2024-06-14 11:57:14,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:14,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:14,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 11:57:14,377 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:14,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:14,378 INFO L85 PathProgramCache]: Analyzing trace with hash -428991926, now seen corresponding path program 6 times [2024-06-14 11:57:14,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:14,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946293648] [2024-06-14 11:57:14,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:14,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:15,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:15,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946293648] [2024-06-14 11:57:15,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946293648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:15,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:15,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:15,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501756715] [2024-06-14 11:57:15,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:15,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:15,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:15,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:15,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:15,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:15,291 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) [2024-06-14 11:57:15,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:15,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:15,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:16,408 INFO L124 PetriNetUnfolderBase]: 2871/4565 cut-off events. [2024-06-14 11:57:16,408 INFO L125 PetriNetUnfolderBase]: For 481970/481972 co-relation queries the response was YES. [2024-06-14 11:57:16,432 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. [2024-06-14 11:57:16,449 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 188 selfloop transitions, 74 changer transitions 0/267 dead transitions. [2024-06-14 11:57:16,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 267 transitions, 3053 flow [2024-06-14 11:57:16,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:16,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:16,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 11:57:16,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-14 11:57:16,451 INFO L175 Difference]: Start difference. First operand has 190 places, 220 transitions, 2120 flow. Second operand 9 states and 195 transitions. [2024-06-14 11:57:16,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 267 transitions, 3053 flow [2024-06-14 11:57:16,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 267 transitions, 2939 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:16,720 INFO L231 Difference]: Finished difference. Result has 194 places, 222 transitions, 2230 flow [2024-06-14 11:57:16,721 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} [2024-06-14 11:57:16,722 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 149 predicate places. [2024-06-14 11:57:16,722 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 222 transitions, 2230 flow [2024-06-14 11:57:16,723 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) [2024-06-14 11:57:16,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:16,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:16,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 11:57:16,723 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:16,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:16,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1624346786, now seen corresponding path program 7 times [2024-06-14 11:57:16,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:16,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794207522] [2024-06-14 11:57:16,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:16,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:17,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:17,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794207522] [2024-06-14 11:57:17,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794207522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:17,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:17,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:17,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435486109] [2024-06-14 11:57:17,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:17,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:17,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:17,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:17,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:17,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:17,782 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) [2024-06-14 11:57:17,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:17,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:17,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:18,935 INFO L124 PetriNetUnfolderBase]: 2835/4509 cut-off events. [2024-06-14 11:57:18,935 INFO L125 PetriNetUnfolderBase]: For 475280/475282 co-relation queries the response was YES. [2024-06-14 11:57:18,958 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. [2024-06-14 11:57:18,975 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 184 selfloop transitions, 72 changer transitions 0/261 dead transitions. [2024-06-14 11:57:18,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 261 transitions, 2867 flow [2024-06-14 11:57:18,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:18,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 11:57:18,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-14 11:57:18,977 INFO L175 Difference]: Start difference. First operand has 194 places, 222 transitions, 2230 flow. Second operand 9 states and 189 transitions. [2024-06-14 11:57:18,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 261 transitions, 2867 flow [2024-06-14 11:57:19,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 261 transitions, 2736 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:19,336 INFO L231 Difference]: Finished difference. Result has 198 places, 222 transitions, 2250 flow [2024-06-14 11:57:19,336 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} [2024-06-14 11:57:19,337 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 153 predicate places. [2024-06-14 11:57:19,337 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 222 transitions, 2250 flow [2024-06-14 11:57:19,337 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) [2024-06-14 11:57:19,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:19,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:19,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 11:57:19,337 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:19,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:19,338 INFO L85 PathProgramCache]: Analyzing trace with hash -371898746, now seen corresponding path program 8 times [2024-06-14 11:57:19,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:19,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972989442] [2024-06-14 11:57:19,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:19,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:20,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:20,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972989442] [2024-06-14 11:57:20,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972989442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:20,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:20,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:20,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115026838] [2024-06-14 11:57:20,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:20,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:20,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:20,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:20,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:20,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:20,346 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) [2024-06-14 11:57:20,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:20,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:20,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:21,453 INFO L124 PetriNetUnfolderBase]: 2910/4634 cut-off events. [2024-06-14 11:57:21,453 INFO L125 PetriNetUnfolderBase]: For 489445/489447 co-relation queries the response was YES. [2024-06-14 11:57:21,482 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. [2024-06-14 11:57:21,499 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 188 selfloop transitions, 67 changer transitions 0/260 dead transitions. [2024-06-14 11:57:21,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 260 transitions, 2912 flow [2024-06-14 11:57:21,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:21,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:21,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-14 11:57:21,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-14 11:57:21,501 INFO L175 Difference]: Start difference. First operand has 198 places, 222 transitions, 2250 flow. Second operand 9 states and 187 transitions. [2024-06-14 11:57:21,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 260 transitions, 2912 flow [2024-06-14 11:57:22,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 260 transitions, 2763 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 11:57:22,021 INFO L231 Difference]: Finished difference. Result has 199 places, 223 transitions, 2280 flow [2024-06-14 11:57:22,022 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} [2024-06-14 11:57:22,022 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 154 predicate places. [2024-06-14 11:57:22,022 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 223 transitions, 2280 flow [2024-06-14 11:57:22,022 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) [2024-06-14 11:57:22,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:22,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:22,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 11:57:22,023 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)] === [2024-06-14 11:57:22,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:22,024 INFO L85 PathProgramCache]: Analyzing trace with hash -365642636, now seen corresponding path program 9 times [2024-06-14 11:57:22,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:22,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074557504] [2024-06-14 11:57:22,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:22,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:22,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:22,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074557504] [2024-06-14 11:57:22,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074557504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:22,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:22,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:22,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143096192] [2024-06-14 11:57:22,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:22,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:22,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:22,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:22,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:23,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:23,101 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) [2024-06-14 11:57:23,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:23,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:23,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:24,214 INFO L124 PetriNetUnfolderBase]: 2985/4769 cut-off events. [2024-06-14 11:57:24,220 INFO L125 PetriNetUnfolderBase]: For 508685/508687 co-relation queries the response was YES. [2024-06-14 11:57:24,251 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. [2024-06-14 11:57:24,269 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 187 selfloop transitions, 68 changer transitions 0/260 dead transitions. [2024-06-14 11:57:24,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 260 transitions, 2940 flow [2024-06-14 11:57:24,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:24,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:24,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-14 11:57:24,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-14 11:57:24,270 INFO L175 Difference]: Start difference. First operand has 199 places, 223 transitions, 2280 flow. Second operand 9 states and 185 transitions. [2024-06-14 11:57:24,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 260 transitions, 2940 flow [2024-06-14 11:57:24,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 260 transitions, 2787 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 11:57:24,717 INFO L231 Difference]: Finished difference. Result has 201 places, 224 transitions, 2310 flow [2024-06-14 11:57:24,717 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} [2024-06-14 11:57:24,718 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 156 predicate places. [2024-06-14 11:57:24,718 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 224 transitions, 2310 flow [2024-06-14 11:57:24,718 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) [2024-06-14 11:57:24,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:24,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:24,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 11:57:24,718 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:24,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:24,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1511121376, now seen corresponding path program 10 times [2024-06-14 11:57:24,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:24,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400450001] [2024-06-14 11:57:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:24,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:25,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:25,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400450001] [2024-06-14 11:57:25,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400450001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:25,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:25,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:25,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006037514] [2024-06-14 11:57:25,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:25,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:25,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:25,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:25,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:25,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:25,641 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) [2024-06-14 11:57:25,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:25,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:25,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:26,812 INFO L124 PetriNetUnfolderBase]: 3043/4867 cut-off events. [2024-06-14 11:57:26,812 INFO L125 PetriNetUnfolderBase]: For 519465/519467 co-relation queries the response was YES. [2024-06-14 11:57:26,843 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. [2024-06-14 11:57:26,863 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 190 selfloop transitions, 70 changer transitions 0/265 dead transitions. [2024-06-14 11:57:26,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 265 transitions, 2996 flow [2024-06-14 11:57:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 11:57:26,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-14 11:57:26,864 INFO L175 Difference]: Start difference. First operand has 201 places, 224 transitions, 2310 flow. Second operand 9 states and 189 transitions. [2024-06-14 11:57:26,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 265 transitions, 2996 flow [2024-06-14 11:57:27,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 265 transitions, 2839 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 11:57:27,269 INFO L231 Difference]: Finished difference. Result has 203 places, 225 transitions, 2341 flow [2024-06-14 11:57:27,269 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} [2024-06-14 11:57:27,269 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 158 predicate places. [2024-06-14 11:57:27,270 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 225 transitions, 2341 flow [2024-06-14 11:57:27,270 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) [2024-06-14 11:57:27,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:27,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:27,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 11:57:27,270 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)] === [2024-06-14 11:57:27,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:27,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1150106675, now seen corresponding path program 1 times [2024-06-14 11:57:27,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:27,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6814579] [2024-06-14 11:57:27,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:27,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:28,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:28,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6814579] [2024-06-14 11:57:28,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6814579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:28,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:28,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:57:28,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14144939] [2024-06-14 11:57:28,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:28,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:57:28,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:28,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:57:28,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:57:28,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:57:28,191 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) [2024-06-14 11:57:28,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:28,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:57:28,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:29,146 INFO L124 PetriNetUnfolderBase]: 2945/4790 cut-off events. [2024-06-14 11:57:29,147 INFO L125 PetriNetUnfolderBase]: For 513741/513745 co-relation queries the response was YES. [2024-06-14 11:57:29,176 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. [2024-06-14 11:57:29,194 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 201 selfloop transitions, 33 changer transitions 0/257 dead transitions. [2024-06-14 11:57:29,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 257 transitions, 3055 flow [2024-06-14 11:57:29,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:29,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:29,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 11:57:29,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 11:57:29,195 INFO L175 Difference]: Start difference. First operand has 203 places, 225 transitions, 2341 flow. Second operand 8 states and 156 transitions. [2024-06-14 11:57:29,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 257 transitions, 3055 flow [2024-06-14 11:57:29,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 257 transitions, 2873 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 11:57:29,635 INFO L231 Difference]: Finished difference. Result has 206 places, 239 transitions, 2453 flow [2024-06-14 11:57:29,635 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} [2024-06-14 11:57:29,635 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 161 predicate places. [2024-06-14 11:57:29,636 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 239 transitions, 2453 flow [2024-06-14 11:57:29,636 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) [2024-06-14 11:57:29,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:29,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:29,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 11:57:29,636 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)] === [2024-06-14 11:57:29,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:29,636 INFO L85 PathProgramCache]: Analyzing trace with hash -934202645, now seen corresponding path program 2 times [2024-06-14 11:57:29,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:29,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135437194] [2024-06-14 11:57:29,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:29,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:30,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:30,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135437194] [2024-06-14 11:57:30,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135437194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:30,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:30,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:57:30,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787286304] [2024-06-14 11:57:30,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:30,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:57:30,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:30,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:57:30,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:57:30,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:57:30,593 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) [2024-06-14 11:57:30,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:30,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:57:30,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:31,510 INFO L124 PetriNetUnfolderBase]: 2955/4803 cut-off events. [2024-06-14 11:57:31,510 INFO L125 PetriNetUnfolderBase]: For 523893/523897 co-relation queries the response was YES. [2024-06-14 11:57:31,538 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. [2024-06-14 11:57:31,556 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 190 selfloop transitions, 45 changer transitions 0/258 dead transitions. [2024-06-14 11:57:31,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 258 transitions, 3154 flow [2024-06-14 11:57:31,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:57:31,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:57:31,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-14 11:57:31,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-14 11:57:31,557 INFO L175 Difference]: Start difference. First operand has 206 places, 239 transitions, 2453 flow. Second operand 7 states and 141 transitions. [2024-06-14 11:57:31,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 258 transitions, 3154 flow [2024-06-14 11:57:31,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 258 transitions, 3069 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 11:57:31,918 INFO L231 Difference]: Finished difference. Result has 209 places, 243 transitions, 2532 flow [2024-06-14 11:57:31,918 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} [2024-06-14 11:57:31,919 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 164 predicate places. [2024-06-14 11:57:31,919 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 243 transitions, 2532 flow [2024-06-14 11:57:31,919 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) [2024-06-14 11:57:31,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:31,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:31,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 11:57:31,919 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:31,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:31,920 INFO L85 PathProgramCache]: Analyzing trace with hash -934192725, now seen corresponding path program 1 times [2024-06-14 11:57:31,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:31,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035077419] [2024-06-14 11:57:31,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:31,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:33,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:33,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035077419] [2024-06-14 11:57:33,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035077419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:33,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:33,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:33,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435106015] [2024-06-14 11:57:33,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:33,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:33,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:33,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:33,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:33,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:57:33,367 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) [2024-06-14 11:57:33,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:33,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:57:33,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:34,211 INFO L124 PetriNetUnfolderBase]: 2960/4812 cut-off events. [2024-06-14 11:57:34,211 INFO L125 PetriNetUnfolderBase]: For 537362/537368 co-relation queries the response was YES. [2024-06-14 11:57:34,243 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. [2024-06-14 11:57:34,261 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 219 selfloop transitions, 20 changer transitions 0/262 dead transitions. [2024-06-14 11:57:34,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 262 transitions, 3115 flow [2024-06-14 11:57:34,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:34,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 11:57:34,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-14 11:57:34,263 INFO L175 Difference]: Start difference. First operand has 209 places, 243 transitions, 2532 flow. Second operand 8 states and 149 transitions. [2024-06-14 11:57:34,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 262 transitions, 3115 flow [2024-06-14 11:57:34,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 262 transitions, 3014 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 11:57:34,626 INFO L231 Difference]: Finished difference. Result has 213 places, 246 transitions, 2543 flow [2024-06-14 11:57:34,626 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} [2024-06-14 11:57:34,626 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 168 predicate places. [2024-06-14 11:57:34,627 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 246 transitions, 2543 flow [2024-06-14 11:57:34,627 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) [2024-06-14 11:57:34,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:34,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:34,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 11:57:34,627 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:34,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:34,627 INFO L85 PathProgramCache]: Analyzing trace with hash -934193190, now seen corresponding path program 2 times [2024-06-14 11:57:34,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:34,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515128437] [2024-06-14 11:57:34,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:34,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:35,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:35,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515128437] [2024-06-14 11:57:35,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515128437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:35,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:35,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:35,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936841918] [2024-06-14 11:57:35,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:35,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:35,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:35,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:35,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:35,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:57:35,992 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) [2024-06-14 11:57:35,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:35,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:57:35,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:36,886 INFO L124 PetriNetUnfolderBase]: 3006/4875 cut-off events. [2024-06-14 11:57:36,887 INFO L125 PetriNetUnfolderBase]: For 557336/557340 co-relation queries the response was YES. [2024-06-14 11:57:36,928 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. [2024-06-14 11:57:36,948 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 195 selfloop transitions, 54 changer transitions 0/272 dead transitions. [2024-06-14 11:57:36,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 272 transitions, 3543 flow [2024-06-14 11:57:36,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:36,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:36,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 11:57:36,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-14 11:57:36,949 INFO L175 Difference]: Start difference. First operand has 213 places, 246 transitions, 2543 flow. Second operand 8 states and 159 transitions. [2024-06-14 11:57:36,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 272 transitions, 3543 flow [2024-06-14 11:57:37,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 272 transitions, 3453 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:37,452 INFO L231 Difference]: Finished difference. Result has 216 places, 254 transitions, 2753 flow [2024-06-14 11:57:37,452 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} [2024-06-14 11:57:37,452 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 171 predicate places. [2024-06-14 11:57:37,452 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 254 transitions, 2753 flow [2024-06-14 11:57:37,453 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) [2024-06-14 11:57:37,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:37,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:37,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 11:57:37,453 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)] === [2024-06-14 11:57:37,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:37,453 INFO L85 PathProgramCache]: Analyzing trace with hash -934206210, now seen corresponding path program 3 times [2024-06-14 11:57:37,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:37,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445218680] [2024-06-14 11:57:37,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:37,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:38,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:38,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445218680] [2024-06-14 11:57:38,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445218680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:38,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:38,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:38,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957992876] [2024-06-14 11:57:38,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:38,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:38,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:38,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:38,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:38,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:57:38,732 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) [2024-06-14 11:57:38,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:38,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:57:38,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:39,672 INFO L124 PetriNetUnfolderBase]: 3010/4881 cut-off events. [2024-06-14 11:57:39,673 INFO L125 PetriNetUnfolderBase]: For 574561/574565 co-relation queries the response was YES. [2024-06-14 11:57:39,707 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. [2024-06-14 11:57:39,724 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 201 selfloop transitions, 50 changer transitions 0/274 dead transitions. [2024-06-14 11:57:39,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 274 transitions, 3524 flow [2024-06-14 11:57:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:39,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:39,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 11:57:39,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-14 11:57:39,726 INFO L175 Difference]: Start difference. First operand has 216 places, 254 transitions, 2753 flow. Second operand 8 states and 157 transitions. [2024-06-14 11:57:39,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 274 transitions, 3524 flow [2024-06-14 11:57:40,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 274 transitions, 3364 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-14 11:57:40,187 INFO L231 Difference]: Finished difference. Result has 220 places, 258 transitions, 2801 flow [2024-06-14 11:57:40,187 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} [2024-06-14 11:57:40,187 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 175 predicate places. [2024-06-14 11:57:40,187 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 258 transitions, 2801 flow [2024-06-14 11:57:40,187 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) [2024-06-14 11:57:40,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:40,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:40,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 11:57:40,188 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:40,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:40,188 INFO L85 PathProgramCache]: Analyzing trace with hash -887880728, now seen corresponding path program 11 times [2024-06-14 11:57:40,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:40,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084996513] [2024-06-14 11:57:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:40,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:41,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:41,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084996513] [2024-06-14 11:57:41,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084996513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:41,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:41,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:41,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182837060] [2024-06-14 11:57:41,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:41,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:41,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:41,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:41,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:41,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:41,170 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) [2024-06-14 11:57:41,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:41,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:41,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:42,380 INFO L124 PetriNetUnfolderBase]: 3240/5182 cut-off events. [2024-06-14 11:57:42,380 INFO L125 PetriNetUnfolderBase]: For 623440/623444 co-relation queries the response was YES. [2024-06-14 11:57:42,414 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. [2024-06-14 11:57:42,432 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 214 selfloop transitions, 74 changer transitions 0/293 dead transitions. [2024-06-14 11:57:42,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 293 transitions, 3527 flow [2024-06-14 11:57:42,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:42,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-14 11:57:42,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-14 11:57:42,435 INFO L175 Difference]: Start difference. First operand has 220 places, 258 transitions, 2801 flow. Second operand 9 states and 179 transitions. [2024-06-14 11:57:42,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 293 transitions, 3527 flow [2024-06-14 11:57:42,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 293 transitions, 3370 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:42,939 INFO L231 Difference]: Finished difference. Result has 223 places, 259 transitions, 2843 flow [2024-06-14 11:57:42,939 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} [2024-06-14 11:57:42,940 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 178 predicate places. [2024-06-14 11:57:42,940 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 259 transitions, 2843 flow [2024-06-14 11:57:42,940 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) [2024-06-14 11:57:42,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:42,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:42,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 11:57:42,940 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:42,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:42,941 INFO L85 PathProgramCache]: Analyzing trace with hash -255718056, now seen corresponding path program 12 times [2024-06-14 11:57:42,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:42,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990880806] [2024-06-14 11:57:42,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:42,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:43,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:43,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990880806] [2024-06-14 11:57:43,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990880806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:43,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:43,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:43,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918471540] [2024-06-14 11:57:43,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:43,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:43,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:43,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:43,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:43,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:43,889 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) [2024-06-14 11:57:43,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:43,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:43,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:45,268 INFO L124 PetriNetUnfolderBase]: 3315/5307 cut-off events. [2024-06-14 11:57:45,268 INFO L125 PetriNetUnfolderBase]: For 645919/645923 co-relation queries the response was YES. [2024-06-14 11:57:45,301 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. [2024-06-14 11:57:45,318 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 219 selfloop transitions, 71 changer transitions 0/295 dead transitions. [2024-06-14 11:57:45,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 295 transitions, 3579 flow [2024-06-14 11:57:45,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:45,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-14 11:57:45,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-14 11:57:45,320 INFO L175 Difference]: Start difference. First operand has 223 places, 259 transitions, 2843 flow. Second operand 9 states and 181 transitions. [2024-06-14 11:57:45,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 295 transitions, 3579 flow [2024-06-14 11:57:45,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 295 transitions, 3406 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 11:57:45,917 INFO L231 Difference]: Finished difference. Result has 225 places, 260 transitions, 2865 flow [2024-06-14 11:57:45,917 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} [2024-06-14 11:57:45,922 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-06-14 11:57:45,923 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 260 transitions, 2865 flow [2024-06-14 11:57:45,923 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) [2024-06-14 11:57:45,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:45,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:45,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 11:57:45,923 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:45,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:45,924 INFO L85 PathProgramCache]: Analyzing trace with hash -249461946, now seen corresponding path program 13 times [2024-06-14 11:57:45,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:45,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233536419] [2024-06-14 11:57:45,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:45,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:46,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:46,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233536419] [2024-06-14 11:57:46,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233536419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:46,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:46,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:46,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680153972] [2024-06-14 11:57:46,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:46,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:46,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:46,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:46,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:46,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:46,826 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) [2024-06-14 11:57:46,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:46,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:46,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:48,099 INFO L124 PetriNetUnfolderBase]: 3365/5403 cut-off events. [2024-06-14 11:57:48,100 INFO L125 PetriNetUnfolderBase]: For 657550/657554 co-relation queries the response was YES. [2024-06-14 11:57:48,138 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. [2024-06-14 11:57:48,157 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 221 selfloop transitions, 70 changer transitions 0/296 dead transitions. [2024-06-14 11:57:48,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 296 transitions, 3605 flow [2024-06-14 11:57:48,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:48,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:48,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-14 11:57:48,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-14 11:57:48,159 INFO L175 Difference]: Start difference. First operand has 225 places, 260 transitions, 2865 flow. Second operand 9 states and 182 transitions. [2024-06-14 11:57:48,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 296 transitions, 3605 flow [2024-06-14 11:57:48,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 296 transitions, 3436 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 11:57:48,886 INFO L231 Difference]: Finished difference. Result has 227 places, 261 transitions, 2891 flow [2024-06-14 11:57:48,896 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} [2024-06-14 11:57:48,897 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-14 11:57:48,897 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 261 transitions, 2891 flow [2024-06-14 11:57:48,897 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) [2024-06-14 11:57:48,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:48,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:48,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 11:57:48,897 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)] === [2024-06-14 11:57:48,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:48,898 INFO L85 PathProgramCache]: Analyzing trace with hash -255895686, now seen corresponding path program 14 times [2024-06-14 11:57:48,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:48,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564796083] [2024-06-14 11:57:48,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:48,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:49,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:49,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564796083] [2024-06-14 11:57:49,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564796083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:49,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:49,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:49,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617793180] [2024-06-14 11:57:49,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:49,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:49,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:49,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:49,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:49,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:49,812 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) [2024-06-14 11:57:49,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:49,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:49,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:51,018 INFO L124 PetriNetUnfolderBase]: 3337/5359 cut-off events. [2024-06-14 11:57:51,018 INFO L125 PetriNetUnfolderBase]: For 634606/634610 co-relation queries the response was YES. [2024-06-14 11:57:51,059 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. [2024-06-14 11:57:51,079 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 219 selfloop transitions, 75 changer transitions 0/299 dead transitions. [2024-06-14 11:57:51,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 299 transitions, 3601 flow [2024-06-14 11:57:51,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:51,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:51,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-14 11:57:51,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-14 11:57:51,080 INFO L175 Difference]: Start difference. First operand has 227 places, 261 transitions, 2891 flow. Second operand 9 states and 183 transitions. [2024-06-14 11:57:51,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 299 transitions, 3601 flow [2024-06-14 11:57:51,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 299 transitions, 3418 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 11:57:51,727 INFO L231 Difference]: Finished difference. Result has 229 places, 261 transitions, 2864 flow [2024-06-14 11:57:51,727 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} [2024-06-14 11:57:51,728 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-14 11:57:51,728 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 261 transitions, 2864 flow [2024-06-14 11:57:51,728 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) [2024-06-14 11:57:51,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:51,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:51,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 11:57:51,728 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:51,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:51,729 INFO L85 PathProgramCache]: Analyzing trace with hash -2028735005, now seen corresponding path program 3 times [2024-06-14 11:57:51,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:51,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137693506] [2024-06-14 11:57:51,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:51,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:52,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:52,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137693506] [2024-06-14 11:57:52,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137693506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:52,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:52,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:57:52,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282580455] [2024-06-14 11:57:52,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:52,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:57:52,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:52,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:57:52,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:57:52,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:57:52,577 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) [2024-06-14 11:57:52,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:52,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:57:52,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:53,577 INFO L124 PetriNetUnfolderBase]: 3179/5164 cut-off events. [2024-06-14 11:57:53,578 INFO L125 PetriNetUnfolderBase]: For 617042/617044 co-relation queries the response was YES. [2024-06-14 11:57:53,618 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. [2024-06-14 11:57:53,639 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 222 selfloop transitions, 34 changer transitions 0/279 dead transitions. [2024-06-14 11:57:53,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 279 transitions, 3475 flow [2024-06-14 11:57:53,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:57:53,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:57:53,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 11:57:53,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-14 11:57:53,640 INFO L175 Difference]: Start difference. First operand has 229 places, 261 transitions, 2864 flow. Second operand 7 states and 139 transitions. [2024-06-14 11:57:53,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 279 transitions, 3475 flow [2024-06-14 11:57:54,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 279 transitions, 3214 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 11:57:54,245 INFO L231 Difference]: Finished difference. Result has 227 places, 264 transitions, 2744 flow [2024-06-14 11:57:54,246 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} [2024-06-14 11:57:54,246 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-14 11:57:54,246 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 264 transitions, 2744 flow [2024-06-14 11:57:54,246 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) [2024-06-14 11:57:54,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:54,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:54,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 11:57:54,247 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:54,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:54,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1134043609, now seen corresponding path program 4 times [2024-06-14 11:57:54,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:54,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453435905] [2024-06-14 11:57:54,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:54,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:55,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:55,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453435905] [2024-06-14 11:57:55,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453435905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:55,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:55,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:57:55,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864712147] [2024-06-14 11:57:55,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:55,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:57:55,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:55,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:57:55,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:57:55,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:57:55,157 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) [2024-06-14 11:57:55,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:55,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:57:55,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:56,165 INFO L124 PetriNetUnfolderBase]: 3184/5171 cut-off events. [2024-06-14 11:57:56,165 INFO L125 PetriNetUnfolderBase]: For 629050/629052 co-relation queries the response was YES. [2024-06-14 11:57:56,202 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. [2024-06-14 11:57:56,221 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 210 selfloop transitions, 47 changer transitions 0/280 dead transitions. [2024-06-14 11:57:56,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 280 transitions, 3488 flow [2024-06-14 11:57:56,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:57:56,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:57:56,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 11:57:56,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-14 11:57:56,222 INFO L175 Difference]: Start difference. First operand has 227 places, 264 transitions, 2744 flow. Second operand 7 states and 139 transitions. [2024-06-14 11:57:56,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 280 transitions, 3488 flow [2024-06-14 11:57:56,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 280 transitions, 3384 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:56,793 INFO L231 Difference]: Finished difference. Result has 229 places, 267 transitions, 2796 flow [2024-06-14 11:57:56,794 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} [2024-06-14 11:57:56,794 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-14 11:57:56,794 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 267 transitions, 2796 flow [2024-06-14 11:57:56,794 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) [2024-06-14 11:57:56,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:56,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:56,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 11:57:56,795 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)] === [2024-06-14 11:57:56,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:56,795 INFO L85 PathProgramCache]: Analyzing trace with hash 303212186, now seen corresponding path program 1 times [2024-06-14 11:57:56,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:56,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462280405] [2024-06-14 11:57:56,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:56,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:57,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:57,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462280405] [2024-06-14 11:57:57,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462280405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:57,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:57,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:57:57,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305173492] [2024-06-14 11:57:57,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:57,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:57:57,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:57,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:57:57,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:57:57,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:57,956 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) [2024-06-14 11:57:57,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:57,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:57,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:59,192 INFO L124 PetriNetUnfolderBase]: 3364/5373 cut-off events. [2024-06-14 11:57:59,192 INFO L125 PetriNetUnfolderBase]: For 652010/652012 co-relation queries the response was YES. [2024-06-14 11:57:59,227 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. [2024-06-14 11:57:59,244 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 218 selfloop transitions, 83 changer transitions 0/306 dead transitions. [2024-06-14 11:57:59,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 306 transitions, 3570 flow [2024-06-14 11:57:59,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:57:59,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:57:59,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-14 11:57:59,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-14 11:57:59,245 INFO L175 Difference]: Start difference. First operand has 229 places, 267 transitions, 2796 flow. Second operand 10 states and 197 transitions. [2024-06-14 11:57:59,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 306 transitions, 3570 flow [2024-06-14 11:57:59,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 306 transitions, 3464 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 11:57:59,969 INFO L231 Difference]: Finished difference. Result has 236 places, 272 transitions, 2955 flow [2024-06-14 11:57:59,969 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} [2024-06-14 11:57:59,970 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 191 predicate places. [2024-06-14 11:57:59,970 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 272 transitions, 2955 flow [2024-06-14 11:57:59,970 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) [2024-06-14 11:57:59,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:59,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:59,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 11:57:59,970 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)] === [2024-06-14 11:57:59,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:59,971 INFO L85 PathProgramCache]: Analyzing trace with hash -80433672, now seen corresponding path program 2 times [2024-06-14 11:57:59,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:59,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16901026] [2024-06-14 11:57:59,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:59,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:01,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:01,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16901026] [2024-06-14 11:58:01,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16901026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:01,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:01,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:58:01,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917068351] [2024-06-14 11:58:01,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:01,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:58:01,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:01,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:58:01,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:58:01,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:58:01,279 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) [2024-06-14 11:58:01,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:01,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:58:01,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:02,626 INFO L124 PetriNetUnfolderBase]: 3392/5422 cut-off events. [2024-06-14 11:58:02,626 INFO L125 PetriNetUnfolderBase]: For 673040/673042 co-relation queries the response was YES. [2024-06-14 11:58:02,663 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. [2024-06-14 11:58:02,682 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 214 selfloop transitions, 98 changer transitions 0/317 dead transitions. [2024-06-14 11:58:02,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 317 transitions, 3831 flow [2024-06-14 11:58:02,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:58:02,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:58:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-14 11:58:02,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-14 11:58:02,683 INFO L175 Difference]: Start difference. First operand has 236 places, 272 transitions, 2955 flow. Second operand 10 states and 197 transitions. [2024-06-14 11:58:02,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 317 transitions, 3831 flow [2024-06-14 11:58:03,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 317 transitions, 3590 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-14 11:58:03,368 INFO L231 Difference]: Finished difference. Result has 240 places, 285 transitions, 3108 flow [2024-06-14 11:58:03,368 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} [2024-06-14 11:58:03,368 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 195 predicate places. [2024-06-14 11:58:03,368 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 285 transitions, 3108 flow [2024-06-14 11:58:03,368 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) [2024-06-14 11:58:03,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:03,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:03,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 11:58:03,369 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)] === [2024-06-14 11:58:03,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:03,369 INFO L85 PathProgramCache]: Analyzing trace with hash 2020366600, now seen corresponding path program 3 times [2024-06-14 11:58:03,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:03,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167524355] [2024-06-14 11:58:03,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:03,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:04,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:04,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167524355] [2024-06-14 11:58:04,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167524355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:04,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:04,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:58:04,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143414947] [2024-06-14 11:58:04,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:04,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:58:04,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:04,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:58:04,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:58:04,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:58:04,596 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) [2024-06-14 11:58:04,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:04,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:58:04,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:05,982 INFO L124 PetriNetUnfolderBase]: 3409/5451 cut-off events. [2024-06-14 11:58:05,982 INFO L125 PetriNetUnfolderBase]: For 692724/692726 co-relation queries the response was YES. [2024-06-14 11:58:06,024 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. [2024-06-14 11:58:06,044 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 221 selfloop transitions, 95 changer transitions 0/321 dead transitions. [2024-06-14 11:58:06,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 321 transitions, 3916 flow [2024-06-14 11:58:06,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:58:06,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:58:06,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-14 11:58:06,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-14 11:58:06,046 INFO L175 Difference]: Start difference. First operand has 240 places, 285 transitions, 3108 flow. Second operand 10 states and 197 transitions. [2024-06-14 11:58:06,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 321 transitions, 3916 flow [2024-06-14 11:58:06,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 321 transitions, 3693 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 11:58:06,900 INFO L231 Difference]: Finished difference. Result has 246 places, 288 transitions, 3177 flow [2024-06-14 11:58:06,900 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} [2024-06-14 11:58:06,900 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-14 11:58:06,900 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 288 transitions, 3177 flow [2024-06-14 11:58:06,901 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) [2024-06-14 11:58:06,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:06,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:06,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 11:58:06,901 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)] === [2024-06-14 11:58:06,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:06,902 INFO L85 PathProgramCache]: Analyzing trace with hash -69958152, now seen corresponding path program 4 times [2024-06-14 11:58:06,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:06,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826785079] [2024-06-14 11:58:06,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:06,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:08,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:08,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826785079] [2024-06-14 11:58:08,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826785079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:08,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:08,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:58:08,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305353307] [2024-06-14 11:58:08,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:08,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:58:08,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:08,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:58:08,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:58:08,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:58:08,158 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) [2024-06-14 11:58:08,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:08,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:58:08,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:09,430 INFO L124 PetriNetUnfolderBase]: 3442/5517 cut-off events. [2024-06-14 11:58:09,435 INFO L125 PetriNetUnfolderBase]: For 701146/701148 co-relation queries the response was YES. [2024-06-14 11:58:09,481 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. [2024-06-14 11:58:09,502 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 216 selfloop transitions, 110 changer transitions 0/331 dead transitions. [2024-06-14 11:58:09,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 331 transitions, 4359 flow [2024-06-14 11:58:09,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:58:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:58:09,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-14 11:58:09,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-14 11:58:09,504 INFO L175 Difference]: Start difference. First operand has 246 places, 288 transitions, 3177 flow. Second operand 10 states and 203 transitions. [2024-06-14 11:58:09,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 331 transitions, 4359 flow [2024-06-14 11:58:10,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 331 transitions, 4104 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-14 11:58:10,275 INFO L231 Difference]: Finished difference. Result has 250 places, 293 transitions, 3334 flow [2024-06-14 11:58:10,276 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} [2024-06-14 11:58:10,276 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-14 11:58:10,276 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 293 transitions, 3334 flow [2024-06-14 11:58:10,276 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) [2024-06-14 11:58:10,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:10,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:10,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 11:58:10,277 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)] === [2024-06-14 11:58:10,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:10,277 INFO L85 PathProgramCache]: Analyzing trace with hash -365533542, now seen corresponding path program 5 times [2024-06-14 11:58:10,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:10,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854732541] [2024-06-14 11:58:10,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:10,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:11,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:11,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854732541] [2024-06-14 11:58:11,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854732541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:11,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:11,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:58:11,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212070607] [2024-06-14 11:58:11,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:11,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:58:11,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:11,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:58:11,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:58:11,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:58:11,503 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) [2024-06-14 11:58:11,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:11,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:58:11,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:12,857 INFO L124 PetriNetUnfolderBase]: 3434/5505 cut-off events. [2024-06-14 11:58:12,857 INFO L125 PetriNetUnfolderBase]: For 708908/708910 co-relation queries the response was YES. [2024-06-14 11:58:12,901 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. [2024-06-14 11:58:12,921 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 224 selfloop transitions, 97 changer transitions 0/326 dead transitions. [2024-06-14 11:58:12,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 326 transitions, 4071 flow [2024-06-14 11:58:12,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:58:12,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:58:12,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-14 11:58:12,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-14 11:58:12,922 INFO L175 Difference]: Start difference. First operand has 250 places, 293 transitions, 3334 flow. Second operand 10 states and 197 transitions. [2024-06-14 11:58:12,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 326 transitions, 4071 flow [2024-06-14 11:58:13,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 326 transitions, 3767 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-14 11:58:13,748 INFO L231 Difference]: Finished difference. Result has 254 places, 294 transitions, 3254 flow [2024-06-14 11:58:13,748 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} [2024-06-14 11:58:13,748 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 209 predicate places. [2024-06-14 11:58:13,749 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 294 transitions, 3254 flow [2024-06-14 11:58:13,749 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) [2024-06-14 11:58:13,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:13,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:13,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 11:58:13,749 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:13,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:13,750 INFO L85 PathProgramCache]: Analyzing trace with hash -462883475, now seen corresponding path program 5 times [2024-06-14 11:58:13,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:13,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589863452] [2024-06-14 11:58:13,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:13,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:14,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:14,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589863452] [2024-06-14 11:58:14,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589863452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:14,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:14,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:58:14,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547353614] [2024-06-14 11:58:14,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:14,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:58:14,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:14,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:58:14,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:58:14,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:14,712 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) [2024-06-14 11:58:14,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:14,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:14,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:15,676 INFO L124 PetriNetUnfolderBase]: 3276/5356 cut-off events. [2024-06-14 11:58:15,676 INFO L125 PetriNetUnfolderBase]: For 717941/717945 co-relation queries the response was YES. [2024-06-14 11:58:15,720 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. [2024-06-14 11:58:15,741 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 219 selfloop transitions, 66 changer transitions 0/308 dead transitions. [2024-06-14 11:58:15,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 308 transitions, 4226 flow [2024-06-14 11:58:15,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:58:15,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:58:15,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 11:58:15,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-14 11:58:15,742 INFO L175 Difference]: Start difference. First operand has 254 places, 294 transitions, 3254 flow. Second operand 7 states and 138 transitions. [2024-06-14 11:58:15,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 308 transitions, 4226 flow [2024-06-14 11:58:16,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 308 transitions, 4005 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 11:58:16,432 INFO L231 Difference]: Finished difference. Result has 254 places, 297 transitions, 3227 flow [2024-06-14 11:58:16,433 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} [2024-06-14 11:58:16,433 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 209 predicate places. [2024-06-14 11:58:16,433 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 297 transitions, 3227 flow [2024-06-14 11:58:16,433 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) [2024-06-14 11:58:16,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:16,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:16,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 11:58:16,434 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:16,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:16,434 INFO L85 PathProgramCache]: Analyzing trace with hash -317190833, now seen corresponding path program 6 times [2024-06-14 11:58:16,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:16,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592624495] [2024-06-14 11:58:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:16,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:17,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:17,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592624495] [2024-06-14 11:58:17,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592624495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:17,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:17,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:58:17,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409851632] [2024-06-14 11:58:17,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:17,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:58:17,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:17,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:58:17,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:58:17,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:17,394 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) [2024-06-14 11:58:17,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:17,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:17,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:18,414 INFO L124 PetriNetUnfolderBase]: 3268/5342 cut-off events. [2024-06-14 11:58:18,414 INFO L125 PetriNetUnfolderBase]: For 731404/731408 co-relation queries the response was YES. [2024-06-14 11:58:18,457 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. [2024-06-14 11:58:18,476 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 222 selfloop transitions, 62 changer transitions 0/307 dead transitions. [2024-06-14 11:58:18,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 307 transitions, 3981 flow [2024-06-14 11:58:18,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:58:18,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:58:18,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 11:58:18,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-14 11:58:18,477 INFO L175 Difference]: Start difference. First operand has 254 places, 297 transitions, 3227 flow. Second operand 7 states and 138 transitions. [2024-06-14 11:58:18,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 307 transitions, 3981 flow [2024-06-14 11:58:19,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 307 transitions, 3788 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-14 11:58:19,316 INFO L231 Difference]: Finished difference. Result has 257 places, 297 transitions, 3166 flow [2024-06-14 11:58:19,316 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} [2024-06-14 11:58:19,316 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 212 predicate places. [2024-06-14 11:58:19,316 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 297 transitions, 3166 flow [2024-06-14 11:58:19,316 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) [2024-06-14 11:58:19,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:19,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:19,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 11:58:19,317 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:19,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:19,317 INFO L85 PathProgramCache]: Analyzing trace with hash -317194398, now seen corresponding path program 4 times [2024-06-14 11:58:19,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:19,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401370339] [2024-06-14 11:58:19,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:19,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:20,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:20,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401370339] [2024-06-14 11:58:20,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401370339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:20,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:20,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:20,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866465120] [2024-06-14 11:58:20,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:20,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:20,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:20,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:20,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:20,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:20,677 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) [2024-06-14 11:58:20,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:20,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:20,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:21,730 INFO L124 PetriNetUnfolderBase]: 3278/5360 cut-off events. [2024-06-14 11:58:21,730 INFO L125 PetriNetUnfolderBase]: For 747716/747720 co-relation queries the response was YES. [2024-06-14 11:58:21,771 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. [2024-06-14 11:58:21,788 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 221 selfloop transitions, 68 changer transitions 0/312 dead transitions. [2024-06-14 11:58:21,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 312 transitions, 4026 flow [2024-06-14 11:58:21,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:21,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:21,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 11:58:21,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 11:58:21,789 INFO L175 Difference]: Start difference. First operand has 257 places, 297 transitions, 3166 flow. Second operand 8 states and 154 transitions. [2024-06-14 11:58:21,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 312 transitions, 4026 flow [2024-06-14 11:58:22,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 312 transitions, 3875 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 11:58:22,688 INFO L231 Difference]: Finished difference. Result has 258 places, 301 transitions, 3258 flow [2024-06-14 11:58:22,689 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} [2024-06-14 11:58:22,689 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 213 predicate places. [2024-06-14 11:58:22,689 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 301 transitions, 3258 flow [2024-06-14 11:58:22,689 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) [2024-06-14 11:58:22,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:22,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:22,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 11:58:22,690 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:22,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:22,690 INFO L85 PathProgramCache]: Analyzing trace with hash -317181378, now seen corresponding path program 5 times [2024-06-14 11:58:22,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:22,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202353746] [2024-06-14 11:58:22,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:22,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:23,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:23,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202353746] [2024-06-14 11:58:23,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202353746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:23,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:23,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:23,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586566135] [2024-06-14 11:58:23,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:23,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:23,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:23,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:23,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:23,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:23,866 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) [2024-06-14 11:58:23,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:23,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:23,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:25,009 INFO L124 PetriNetUnfolderBase]: 3306/5404 cut-off events. [2024-06-14 11:58:25,009 INFO L125 PetriNetUnfolderBase]: For 772579/772583 co-relation queries the response was YES. [2024-06-14 11:58:25,049 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. [2024-06-14 11:58:25,067 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 226 selfloop transitions, 72 changer transitions 0/321 dead transitions. [2024-06-14 11:58:25,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 321 transitions, 4410 flow [2024-06-14 11:58:25,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:25,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 11:58:25,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 11:58:25,068 INFO L175 Difference]: Start difference. First operand has 258 places, 301 transitions, 3258 flow. Second operand 8 states and 156 transitions. [2024-06-14 11:58:25,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 321 transitions, 4410 flow [2024-06-14 11:58:25,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 321 transitions, 4195 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:25,940 INFO L231 Difference]: Finished difference. Result has 261 places, 309 transitions, 3416 flow [2024-06-14 11:58:25,941 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} [2024-06-14 11:58:25,941 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 216 predicate places. [2024-06-14 11:58:25,941 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 309 transitions, 3416 flow [2024-06-14 11:58:25,941 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) [2024-06-14 11:58:25,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:25,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:25,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 11:58:25,942 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:25,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:25,942 INFO L85 PathProgramCache]: Analyzing trace with hash -463023285, now seen corresponding path program 2 times [2024-06-14 11:58:25,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:25,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973965314] [2024-06-14 11:58:25,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:25,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:27,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:27,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973965314] [2024-06-14 11:58:27,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973965314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:27,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:27,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:27,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817807162] [2024-06-14 11:58:27,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:27,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:27,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:27,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:27,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:27,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:27,139 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) [2024-06-14 11:58:27,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:27,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:27,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:28,134 INFO L124 PetriNetUnfolderBase]: 3316/5410 cut-off events. [2024-06-14 11:58:28,134 INFO L125 PetriNetUnfolderBase]: For 797085/797093 co-relation queries the response was YES. [2024-06-14 11:58:28,178 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. [2024-06-14 11:58:28,305 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 277 selfloop transitions, 24 changer transitions 0/324 dead transitions. [2024-06-14 11:58:28,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 324 transitions, 4143 flow [2024-06-14 11:58:28,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:28,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:28,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 11:58:28,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 11:58:28,307 INFO L175 Difference]: Start difference. First operand has 261 places, 309 transitions, 3416 flow. Second operand 8 states and 146 transitions. [2024-06-14 11:58:28,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 324 transitions, 4143 flow [2024-06-14 11:58:29,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 324 transitions, 3951 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-14 11:58:29,009 INFO L231 Difference]: Finished difference. Result has 265 places, 312 transitions, 3374 flow [2024-06-14 11:58:29,009 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} [2024-06-14 11:58:29,010 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 220 predicate places. [2024-06-14 11:58:29,010 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 312 transitions, 3374 flow [2024-06-14 11:58:29,010 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) [2024-06-14 11:58:29,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:29,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:29,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 11:58:29,011 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:29,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:29,011 INFO L85 PathProgramCache]: Analyzing trace with hash -301943793, now seen corresponding path program 3 times [2024-06-14 11:58:29,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:29,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46740715] [2024-06-14 11:58:29,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:29,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:29,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:30,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:30,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46740715] [2024-06-14 11:58:30,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46740715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:30,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:30,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:30,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011874514] [2024-06-14 11:58:30,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:30,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:30,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:30,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:30,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:30,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:30,580 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) [2024-06-14 11:58:30,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:30,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:30,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:31,804 INFO L124 PetriNetUnfolderBase]: 3321/5423 cut-off events. [2024-06-14 11:58:31,804 INFO L125 PetriNetUnfolderBase]: For 809890/809892 co-relation queries the response was YES. [2024-06-14 11:58:31,848 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. [2024-06-14 11:58:31,869 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 287 selfloop transitions, 18 changer transitions 0/328 dead transitions. [2024-06-14 11:58:31,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 328 transitions, 4114 flow [2024-06-14 11:58:31,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:31,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:31,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 11:58:31,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-14 11:58:31,871 INFO L175 Difference]: Start difference. First operand has 265 places, 312 transitions, 3374 flow. Second operand 8 states and 143 transitions. [2024-06-14 11:58:31,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 328 transitions, 4114 flow [2024-06-14 11:58:32,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 328 transitions, 3990 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:32,764 INFO L231 Difference]: Finished difference. Result has 268 places, 318 transitions, 3412 flow [2024-06-14 11:58:32,764 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} [2024-06-14 11:58:32,765 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 223 predicate places. [2024-06-14 11:58:32,765 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 318 transitions, 3412 flow [2024-06-14 11:58:32,765 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) [2024-06-14 11:58:32,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:32,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:32,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 11:58:32,765 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:32,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:32,766 INFO L85 PathProgramCache]: Analyzing trace with hash -991849203, now seen corresponding path program 4 times [2024-06-14 11:58:32,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:32,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922613783] [2024-06-14 11:58:32,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:32,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:34,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:34,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922613783] [2024-06-14 11:58:34,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922613783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:34,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:34,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:34,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405731113] [2024-06-14 11:58:34,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:34,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:34,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:34,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:34,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:34,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:34,243 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) [2024-06-14 11:58:34,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:34,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:34,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:35,412 INFO L124 PetriNetUnfolderBase]: 3318/5424 cut-off events. [2024-06-14 11:58:35,412 INFO L125 PetriNetUnfolderBase]: For 825527/825539 co-relation queries the response was YES. [2024-06-14 11:58:35,456 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. [2024-06-14 11:58:35,476 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 271 selfloop transitions, 41 changer transitions 0/335 dead transitions. [2024-06-14 11:58:35,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 335 transitions, 4179 flow [2024-06-14 11:58:35,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:35,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:35,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 11:58:35,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 11:58:35,478 INFO L175 Difference]: Start difference. First operand has 268 places, 318 transitions, 3412 flow. Second operand 8 states and 148 transitions. [2024-06-14 11:58:35,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 335 transitions, 4179 flow [2024-06-14 11:58:36,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 335 transitions, 4064 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-14 11:58:36,523 INFO L231 Difference]: Finished difference. Result has 273 places, 324 transitions, 3525 flow [2024-06-14 11:58:36,523 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} [2024-06-14 11:58:36,524 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 228 predicate places. [2024-06-14 11:58:36,524 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 324 transitions, 3525 flow [2024-06-14 11:58:36,524 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) [2024-06-14 11:58:36,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:36,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:36,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 11:58:36,524 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:36,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:36,525 INFO L85 PathProgramCache]: Analyzing trace with hash -302449248, now seen corresponding path program 6 times [2024-06-14 11:58:36,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:36,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325619897] [2024-06-14 11:58:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:36,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:37,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:37,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325619897] [2024-06-14 11:58:37,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325619897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:37,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:37,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:37,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337939442] [2024-06-14 11:58:37,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:37,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:37,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:37,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:37,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:37,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:37,907 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) [2024-06-14 11:58:37,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:37,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:37,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:39,022 INFO L124 PetriNetUnfolderBase]: 3322/5428 cut-off events. [2024-06-14 11:58:39,023 INFO L125 PetriNetUnfolderBase]: For 843582/843586 co-relation queries the response was YES. [2024-06-14 11:58:39,068 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. [2024-06-14 11:58:39,087 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 231 selfloop transitions, 98 changer transitions 0/352 dead transitions. [2024-06-14 11:58:39,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 352 transitions, 4999 flow [2024-06-14 11:58:39,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:39,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:39,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 11:58:39,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-14 11:58:39,088 INFO L175 Difference]: Start difference. First operand has 273 places, 324 transitions, 3525 flow. Second operand 8 states and 158 transitions. [2024-06-14 11:58:39,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 352 transitions, 4999 flow [2024-06-14 11:58:39,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 352 transitions, 4880 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-14 11:58:39,880 INFO L231 Difference]: Finished difference. Result has 279 places, 339 transitions, 3954 flow [2024-06-14 11:58:39,880 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} [2024-06-14 11:58:39,881 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 234 predicate places. [2024-06-14 11:58:39,881 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 339 transitions, 3954 flow [2024-06-14 11:58:39,881 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) [2024-06-14 11:58:39,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:39,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:39,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 11:58:39,881 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:39,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:39,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1704900593, now seen corresponding path program 7 times [2024-06-14 11:58:39,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:39,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29608997] [2024-06-14 11:58:39,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:39,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:40,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:40,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29608997] [2024-06-14 11:58:40,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29608997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:40,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:40,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:58:40,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799947260] [2024-06-14 11:58:40,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:40,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:58:40,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:40,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:58:40,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:58:40,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:40,762 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) [2024-06-14 11:58:40,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:40,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:40,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:41,932 INFO L124 PetriNetUnfolderBase]: 3378/5498 cut-off events. [2024-06-14 11:58:41,932 INFO L125 PetriNetUnfolderBase]: For 860742/860746 co-relation queries the response was YES. [2024-06-14 11:58:41,982 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. [2024-06-14 11:58:42,003 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 307 selfloop transitions, 53 changer transitions 0/383 dead transitions. [2024-06-14 11:58:42,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 383 transitions, 5062 flow [2024-06-14 11:58:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:42,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-14 11:58:42,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-14 11:58:42,013 INFO L175 Difference]: Start difference. First operand has 279 places, 339 transitions, 3954 flow. Second operand 8 states and 163 transitions. [2024-06-14 11:58:42,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 383 transitions, 5062 flow [2024-06-14 11:58:42,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 383 transitions, 4784 flow, removed 96 selfloop flow, removed 3 redundant places. [2024-06-14 11:58:42,963 INFO L231 Difference]: Finished difference. Result has 287 places, 359 transitions, 4166 flow [2024-06-14 11:58:42,963 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} [2024-06-14 11:58:42,963 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 242 predicate places. [2024-06-14 11:58:42,964 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 359 transitions, 4166 flow [2024-06-14 11:58:42,972 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) [2024-06-14 11:58:42,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:42,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:42,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 11:58:42,972 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:42,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:42,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1775934465, now seen corresponding path program 1 times [2024-06-14 11:58:42,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:42,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824854879] [2024-06-14 11:58:42,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:42,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:43,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:43,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824854879] [2024-06-14 11:58:43,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824854879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:43,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:43,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:43,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052114959] [2024-06-14 11:58:43,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:43,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:43,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:43,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:43,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:43,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:43,940 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) [2024-06-14 11:58:43,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:43,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:43,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:45,201 INFO L124 PetriNetUnfolderBase]: 3448/5618 cut-off events. [2024-06-14 11:58:45,201 INFO L125 PetriNetUnfolderBase]: For 876608/876610 co-relation queries the response was YES. [2024-06-14 11:58:45,254 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. [2024-06-14 11:58:45,276 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 344 selfloop transitions, 18 changer transitions 0/382 dead transitions. [2024-06-14 11:58:45,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 382 transitions, 5010 flow [2024-06-14 11:58:45,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:45,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:45,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 11:58:45,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 11:58:45,278 INFO L175 Difference]: Start difference. First operand has 287 places, 359 transitions, 4166 flow. Second operand 8 states and 153 transitions. [2024-06-14 11:58:45,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 382 transitions, 5010 flow [2024-06-14 11:58:46,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 382 transitions, 4834 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 11:58:46,554 INFO L231 Difference]: Finished difference. Result has 287 places, 362 transitions, 4098 flow [2024-06-14 11:58:46,554 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} [2024-06-14 11:58:46,554 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 242 predicate places. [2024-06-14 11:58:46,555 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 362 transitions, 4098 flow [2024-06-14 11:58:46,555 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) [2024-06-14 11:58:46,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:46,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:46,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 11:58:46,555 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:46,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:46,556 INFO L85 PathProgramCache]: Analyzing trace with hash 262065062, now seen corresponding path program 1 times [2024-06-14 11:58:46,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:46,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9539823] [2024-06-14 11:58:46,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:46,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:47,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:47,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9539823] [2024-06-14 11:58:47,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9539823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:47,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:47,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:47,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630028366] [2024-06-14 11:58:47,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:47,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:47,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:47,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:47,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:47,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:47,744 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) [2024-06-14 11:58:47,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:47,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:47,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:48,883 INFO L124 PetriNetUnfolderBase]: 3458/5634 cut-off events. [2024-06-14 11:58:48,883 INFO L125 PetriNetUnfolderBase]: For 898644/898646 co-relation queries the response was YES. [2024-06-14 11:58:48,936 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. [2024-06-14 11:58:48,958 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 344 selfloop transitions, 18 changer transitions 0/382 dead transitions. [2024-06-14 11:58:48,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 382 transitions, 4934 flow [2024-06-14 11:58:48,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:48,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:48,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 11:58:48,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 11:58:48,960 INFO L175 Difference]: Start difference. First operand has 287 places, 362 transitions, 4098 flow. Second operand 8 states and 150 transitions. [2024-06-14 11:58:48,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 382 transitions, 4934 flow [2024-06-14 11:58:50,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 382 transitions, 4848 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:50,190 INFO L231 Difference]: Finished difference. Result has 289 places, 365 transitions, 4120 flow [2024-06-14 11:58:50,190 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} [2024-06-14 11:58:50,190 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 244 predicate places. [2024-06-14 11:58:50,190 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 365 transitions, 4120 flow [2024-06-14 11:58:50,190 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) [2024-06-14 11:58:50,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:50,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:50,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 11:58:50,191 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:50,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:50,191 INFO L85 PathProgramCache]: Analyzing trace with hash 262064845, now seen corresponding path program 2 times [2024-06-14 11:58:50,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:50,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845522433] [2024-06-14 11:58:50,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:50,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:51,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:51,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845522433] [2024-06-14 11:58:51,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845522433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:51,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:51,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:51,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457748235] [2024-06-14 11:58:51,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:51,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:51,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:51,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:51,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:51,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:51,173 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) [2024-06-14 11:58:51,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:51,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:51,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:52,362 INFO L124 PetriNetUnfolderBase]: 3468/5650 cut-off events. [2024-06-14 11:58:52,362 INFO L125 PetriNetUnfolderBase]: For 913107/913109 co-relation queries the response was YES. [2024-06-14 11:58:52,415 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. [2024-06-14 11:58:52,438 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 343 selfloop transitions, 23 changer transitions 0/386 dead transitions. [2024-06-14 11:58:52,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 386 transitions, 4974 flow [2024-06-14 11:58:52,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:52,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:52,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 11:58:52,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 11:58:52,441 INFO L175 Difference]: Start difference. First operand has 289 places, 365 transitions, 4120 flow. Second operand 8 states and 153 transitions. [2024-06-14 11:58:52,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 386 transitions, 4974 flow [2024-06-14 11:58:53,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 386 transitions, 4888 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:53,774 INFO L231 Difference]: Finished difference. Result has 291 places, 368 transitions, 4160 flow [2024-06-14 11:58:53,774 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} [2024-06-14 11:58:53,775 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 246 predicate places. [2024-06-14 11:58:53,775 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 368 transitions, 4160 flow [2024-06-14 11:58:53,775 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) [2024-06-14 11:58:53,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:53,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:53,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 11:58:53,775 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:53,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:53,792 INFO L85 PathProgramCache]: Analyzing trace with hash 2004499238, now seen corresponding path program 2 times [2024-06-14 11:58:53,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:53,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201110077] [2024-06-14 11:58:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:53,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:54,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:54,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201110077] [2024-06-14 11:58:54,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201110077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:54,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:54,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:54,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776598924] [2024-06-14 11:58:54,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:54,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:54,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:54,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:54,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:55,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:55,008 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) [2024-06-14 11:58:55,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:55,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:55,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:56,217 INFO L124 PetriNetUnfolderBase]: 3489/5681 cut-off events. [2024-06-14 11:58:56,217 INFO L125 PetriNetUnfolderBase]: For 941115/941117 co-relation queries the response was YES. [2024-06-14 11:58:56,268 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. [2024-06-14 11:58:56,290 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 341 selfloop transitions, 31 changer transitions 0/392 dead transitions. [2024-06-14 11:58:56,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 392 transitions, 5266 flow [2024-06-14 11:58:56,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:56,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 11:58:56,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 11:58:56,291 INFO L175 Difference]: Start difference. First operand has 291 places, 368 transitions, 4160 flow. Second operand 8 states and 150 transitions. [2024-06-14 11:58:56,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 392 transitions, 5266 flow [2024-06-14 11:58:57,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 392 transitions, 5162 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:57,646 INFO L231 Difference]: Finished difference. Result has 294 places, 378 transitions, 4291 flow [2024-06-14 11:58:57,646 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} [2024-06-14 11:58:57,647 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 249 predicate places. [2024-06-14 11:58:57,647 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 378 transitions, 4291 flow [2024-06-14 11:58:57,647 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) [2024-06-14 11:58:57,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:57,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:57,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 11:58:57,648 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:57,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:57,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1146996432, now seen corresponding path program 3 times [2024-06-14 11:58:57,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:57,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463753585] [2024-06-14 11:58:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:57,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:58,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:58,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463753585] [2024-06-14 11:58:58,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463753585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:58,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:58,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:58,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641749268] [2024-06-14 11:58:58,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:58,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:58,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:58,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:58,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:58,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:58,888 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) [2024-06-14 11:58:58,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:58,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:58,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:00,189 INFO L124 PetriNetUnfolderBase]: 3488/5680 cut-off events. [2024-06-14 11:59:00,189 INFO L125 PetriNetUnfolderBase]: For 957181/957183 co-relation queries the response was YES. [2024-06-14 11:59:00,241 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. [2024-06-14 11:59:00,262 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 350 selfloop transitions, 25 changer transitions 0/395 dead transitions. [2024-06-14 11:59:00,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 395 transitions, 5158 flow [2024-06-14 11:59:00,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:00,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:00,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 11:59:00,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-14 11:59:00,264 INFO L175 Difference]: Start difference. First operand has 294 places, 378 transitions, 4291 flow. Second operand 8 states and 149 transitions. [2024-06-14 11:59:00,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 395 transitions, 5158 flow [2024-06-14 11:59:01,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 395 transitions, 5018 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-14 11:59:01,571 INFO L231 Difference]: Finished difference. Result has 297 places, 381 transitions, 4291 flow [2024-06-14 11:59:01,571 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} [2024-06-14 11:59:01,571 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 252 predicate places. [2024-06-14 11:59:01,571 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 381 transitions, 4291 flow [2024-06-14 11:59:01,571 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) [2024-06-14 11:59:01,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:01,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:01,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 11:59:01,572 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:01,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:01,572 INFO L85 PathProgramCache]: Analyzing trace with hash 267629035, now seen corresponding path program 3 times [2024-06-14 11:59:01,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:01,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608598231] [2024-06-14 11:59:01,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:01,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:02,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:02,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608598231] [2024-06-14 11:59:02,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608598231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:02,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:02,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:02,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555883772] [2024-06-14 11:59:02,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:02,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:02,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:02,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:02,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:02,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:59:02,647 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) [2024-06-14 11:59:02,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:02,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:59:02,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:03,800 INFO L124 PetriNetUnfolderBase]: 3498/5696 cut-off events. [2024-06-14 11:59:03,800 INFO L125 PetriNetUnfolderBase]: For 970572/970574 co-relation queries the response was YES. [2024-06-14 11:59:03,857 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. [2024-06-14 11:59:03,880 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 349 selfloop transitions, 30 changer transitions 0/399 dead transitions. [2024-06-14 11:59:03,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 399 transitions, 5169 flow [2024-06-14 11:59:03,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:03,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:03,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 11:59:03,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:59:03,882 INFO L175 Difference]: Start difference. First operand has 297 places, 381 transitions, 4291 flow. Second operand 8 states and 152 transitions. [2024-06-14 11:59:03,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 399 transitions, 5169 flow [2024-06-14 11:59:05,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 399 transitions, 5059 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:05,490 INFO L231 Difference]: Finished difference. Result has 299 places, 384 transitions, 4329 flow [2024-06-14 11:59:05,491 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} [2024-06-14 11:59:05,491 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 254 predicate places. [2024-06-14 11:59:05,491 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 384 transitions, 4329 flow [2024-06-14 11:59:05,491 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) [2024-06-14 11:59:05,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:05,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:05,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 11:59:05,491 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:05,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:05,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1000861740, now seen corresponding path program 4 times [2024-06-14 11:59:05,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:05,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223664439] [2024-06-14 11:59:05,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:05,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:06,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:06,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223664439] [2024-06-14 11:59:06,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223664439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:06,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:06,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:06,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047120898] [2024-06-14 11:59:06,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:06,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:06,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:06,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:06,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:06,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:59:06,883 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) [2024-06-14 11:59:06,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:06,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:59:06,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:08,061 INFO L124 PetriNetUnfolderBase]: 3532/5747 cut-off events. [2024-06-14 11:59:08,061 INFO L125 PetriNetUnfolderBase]: For 1010031/1010035 co-relation queries the response was YES. [2024-06-14 11:59:08,119 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. [2024-06-14 11:59:08,142 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 346 selfloop transitions, 37 changer transitions 0/403 dead transitions. [2024-06-14 11:59:08,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 403 transitions, 5485 flow [2024-06-14 11:59:08,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:08,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:08,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 11:59:08,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:59:08,144 INFO L175 Difference]: Start difference. First operand has 299 places, 384 transitions, 4329 flow. Second operand 8 states and 152 transitions. [2024-06-14 11:59:08,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 403 transitions, 5485 flow [2024-06-14 11:59:09,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 403 transitions, 5359 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:09,743 INFO L231 Difference]: Finished difference. Result has 301 places, 390 transitions, 4446 flow [2024-06-14 11:59:09,744 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} [2024-06-14 11:59:09,744 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 256 predicate places. [2024-06-14 11:59:09,744 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 390 transitions, 4446 flow [2024-06-14 11:59:09,744 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) [2024-06-14 11:59:09,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:09,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:09,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 11:59:09,745 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:09,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:09,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1000869180, now seen corresponding path program 5 times [2024-06-14 11:59:09,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:09,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370808651] [2024-06-14 11:59:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:09,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:11,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:11,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370808651] [2024-06-14 11:59:11,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370808651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:11,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:11,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:11,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033258073] [2024-06-14 11:59:11,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:11,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:11,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:11,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:11,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:11,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:59:11,144 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) [2024-06-14 11:59:11,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:11,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:59:11,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:12,286 INFO L124 PetriNetUnfolderBase]: 3526/5739 cut-off events. [2024-06-14 11:59:12,286 INFO L125 PetriNetUnfolderBase]: For 1017396/1017400 co-relation queries the response was YES. [2024-06-14 11:59:12,343 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. [2024-06-14 11:59:12,366 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 353 selfloop transitions, 30 changer transitions 0/403 dead transitions. [2024-06-14 11:59:12,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 403 transitions, 5312 flow [2024-06-14 11:59:12,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:12,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:12,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 11:59:12,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-14 11:59:12,368 INFO L175 Difference]: Start difference. First operand has 301 places, 390 transitions, 4446 flow. Second operand 8 states and 147 transitions. [2024-06-14 11:59:12,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 403 transitions, 5312 flow [2024-06-14 11:59:13,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 403 transitions, 5205 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 11:59:13,880 INFO L231 Difference]: Finished difference. Result has 305 places, 393 transitions, 4485 flow [2024-06-14 11:59:13,880 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} [2024-06-14 11:59:13,880 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 260 predicate places. [2024-06-14 11:59:13,880 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 393 transitions, 4485 flow [2024-06-14 11:59:13,880 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) [2024-06-14 11:59:13,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:13,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:13,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 11:59:13,881 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:13,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:13,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1000869397, now seen corresponding path program 4 times [2024-06-14 11:59:13,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:13,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083982909] [2024-06-14 11:59:13,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:13,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:13,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:14,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:14,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:14,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083982909] [2024-06-14 11:59:14,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083982909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:14,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:14,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:14,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393080669] [2024-06-14 11:59:14,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:14,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:14,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:14,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:14,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:14,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:59:14,960 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) [2024-06-14 11:59:14,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:14,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:59:14,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:16,154 INFO L124 PetriNetUnfolderBase]: 3528/5744 cut-off events. [2024-06-14 11:59:16,155 INFO L125 PetriNetUnfolderBase]: For 1029302/1029306 co-relation queries the response was YES. [2024-06-14 11:59:16,210 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. [2024-06-14 11:59:16,233 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 349 selfloop transitions, 39 changer transitions 0/408 dead transitions. [2024-06-14 11:59:16,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 408 transitions, 5379 flow [2024-06-14 11:59:16,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:16,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:16,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 11:59:16,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 11:59:16,234 INFO L175 Difference]: Start difference. First operand has 305 places, 393 transitions, 4485 flow. Second operand 8 states and 151 transitions. [2024-06-14 11:59:16,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 408 transitions, 5379 flow [2024-06-14 11:59:17,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 408 transitions, 5263 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:17,861 INFO L231 Difference]: Finished difference. Result has 307 places, 396 transitions, 4543 flow [2024-06-14 11:59:17,861 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} [2024-06-14 11:59:17,862 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 262 predicate places. [2024-06-14 11:59:17,862 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 396 transitions, 4543 flow [2024-06-14 11:59:17,862 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) [2024-06-14 11:59:17,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:17,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:17,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 11:59:17,862 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:17,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:17,863 INFO L85 PathProgramCache]: Analyzing trace with hash -302264550, now seen corresponding path program 6 times [2024-06-14 11:59:17,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:17,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265265786] [2024-06-14 11:59:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:17,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:19,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:19,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265265786] [2024-06-14 11:59:19,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265265786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:19,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:19,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:19,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111000514] [2024-06-14 11:59:19,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:19,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:19,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:19,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:19,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:19,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:59:19,140 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) [2024-06-14 11:59:19,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:19,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:59:19,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:20,343 INFO L124 PetriNetUnfolderBase]: 3527/5743 cut-off events. [2024-06-14 11:59:20,343 INFO L125 PetriNetUnfolderBase]: For 1045353/1045357 co-relation queries the response was YES. [2024-06-14 11:59:20,398 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. [2024-06-14 11:59:20,420 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 326 selfloop transitions, 70 changer transitions 0/416 dead transitions. [2024-06-14 11:59:20,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 416 transitions, 5761 flow [2024-06-14 11:59:20,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:20,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:20,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 11:59:20,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 11:59:20,421 INFO L175 Difference]: Start difference. First operand has 307 places, 396 transitions, 4543 flow. Second operand 8 states and 153 transitions. [2024-06-14 11:59:20,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 416 transitions, 5761 flow [2024-06-14 11:59:22,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 416 transitions, 5609 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:22,075 INFO L231 Difference]: Finished difference. Result has 309 places, 402 transitions, 4716 flow [2024-06-14 11:59:22,076 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} [2024-06-14 11:59:22,076 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 264 predicate places. [2024-06-14 11:59:22,076 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 402 transitions, 4716 flow [2024-06-14 11:59:22,076 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) [2024-06-14 11:59:22,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:22,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:22,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 11:59:22,077 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:22,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:22,077 INFO L85 PathProgramCache]: Analyzing trace with hash -991326357, now seen corresponding path program 1 times [2024-06-14 11:59:22,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:22,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599269799] [2024-06-14 11:59:22,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:22,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:23,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:23,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599269799] [2024-06-14 11:59:23,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599269799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:23,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:23,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:59:23,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424936680] [2024-06-14 11:59:23,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:23,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:59:23,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:23,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:59:23,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:59:23,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:59:23,826 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) [2024-06-14 11:59:23,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:23,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:59:23,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:25,118 INFO L124 PetriNetUnfolderBase]: 3483/5655 cut-off events. [2024-06-14 11:59:25,119 INFO L125 PetriNetUnfolderBase]: For 1054893/1054895 co-relation queries the response was YES. [2024-06-14 11:59:25,177 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. [2024-06-14 11:59:25,202 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 363 selfloop transitions, 19 changer transitions 0/415 dead transitions. [2024-06-14 11:59:25,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 415 transitions, 5606 flow [2024-06-14 11:59:25,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:25,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 11:59:25,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 11:59:25,206 INFO L175 Difference]: Start difference. First operand has 309 places, 402 transitions, 4716 flow. Second operand 8 states and 144 transitions. [2024-06-14 11:59:25,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 415 transitions, 5606 flow [2024-06-14 11:59:27,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 415 transitions, 5481 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-14 11:59:27,216 INFO L231 Difference]: Finished difference. Result has 313 places, 404 transitions, 4736 flow [2024-06-14 11:59:27,216 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} [2024-06-14 11:59:27,217 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 268 predicate places. [2024-06-14 11:59:27,217 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 404 transitions, 4736 flow [2024-06-14 11:59:27,217 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) [2024-06-14 11:59:27,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:27,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:27,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 11:59:27,217 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:27,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:27,218 INFO L85 PathProgramCache]: Analyzing trace with hash 749805109, now seen corresponding path program 1 times [2024-06-14 11:59:27,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:27,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037196788] [2024-06-14 11:59:27,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:27,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:28,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:28,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037196788] [2024-06-14 11:59:28,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037196788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:28,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:28,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:28,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441327076] [2024-06-14 11:59:28,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:28,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:28,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:28,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:28,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:28,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:59:28,093 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) [2024-06-14 11:59:28,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:28,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:59:28,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:29,559 INFO L124 PetriNetUnfolderBase]: 3504/5684 cut-off events. [2024-06-14 11:59:29,559 INFO L125 PetriNetUnfolderBase]: For 1080713/1080723 co-relation queries the response was YES. [2024-06-14 11:59:29,610 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. [2024-06-14 11:59:29,631 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 350 selfloop transitions, 51 changer transitions 0/434 dead transitions. [2024-06-14 11:59:29,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 434 transitions, 5735 flow [2024-06-14 11:59:29,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:29,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:29,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-14 11:59:29,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-14 11:59:29,633 INFO L175 Difference]: Start difference. First operand has 313 places, 404 transitions, 4736 flow. Second operand 8 states and 164 transitions. [2024-06-14 11:59:29,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 434 transitions, 5735 flow [2024-06-14 11:59:30,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 434 transitions, 5590 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-14 11:59:30,926 INFO L231 Difference]: Finished difference. Result has 314 places, 407 transitions, 4815 flow [2024-06-14 11:59:30,926 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} [2024-06-14 11:59:30,927 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 269 predicate places. [2024-06-14 11:59:30,927 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 407 transitions, 4815 flow [2024-06-14 11:59:30,927 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) [2024-06-14 11:59:30,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:30,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:30,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 11:59:30,927 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:30,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:30,928 INFO L85 PathProgramCache]: Analyzing trace with hash 760280629, now seen corresponding path program 2 times [2024-06-14 11:59:30,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:30,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523607909] [2024-06-14 11:59:30,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:30,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:31,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:31,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523607909] [2024-06-14 11:59:31,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523607909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:31,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:31,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:31,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713180575] [2024-06-14 11:59:31,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:31,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:31,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:31,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:31,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:31,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:59:31,835 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) [2024-06-14 11:59:31,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:31,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:59:31,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:33,200 INFO L124 PetriNetUnfolderBase]: 3520/5718 cut-off events. [2024-06-14 11:59:33,200 INFO L125 PetriNetUnfolderBase]: For 1101962/1101972 co-relation queries the response was YES. [2024-06-14 11:59:33,259 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. [2024-06-14 11:59:33,283 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 348 selfloop transitions, 52 changer transitions 0/433 dead transitions. [2024-06-14 11:59:33,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 433 transitions, 5806 flow [2024-06-14 11:59:33,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:33,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:33,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 11:59:33,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-14 11:59:33,285 INFO L175 Difference]: Start difference. First operand has 314 places, 407 transitions, 4815 flow. Second operand 8 states and 161 transitions. [2024-06-14 11:59:33,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 433 transitions, 5806 flow [2024-06-14 11:59:35,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 433 transitions, 5604 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:35,099 INFO L231 Difference]: Finished difference. Result has 316 places, 410 transitions, 4845 flow [2024-06-14 11:59:35,099 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} [2024-06-14 11:59:35,100 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 271 predicate places. [2024-06-14 11:59:35,100 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 410 transitions, 4845 flow [2024-06-14 11:59:35,100 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) [2024-06-14 11:59:35,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:35,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:35,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 11:59:35,100 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:35,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:35,101 INFO L85 PathProgramCache]: Analyzing trace with hash 760293525, now seen corresponding path program 1 times [2024-06-14 11:59:35,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:35,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212207906] [2024-06-14 11:59:35,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:35,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:36,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:36,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212207906] [2024-06-14 11:59:36,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212207906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:36,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:36,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:59:36,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710272854] [2024-06-14 11:59:36,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:36,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:59:36,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:36,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:59:36,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:59:36,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:59:36,546 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) [2024-06-14 11:59:36,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:36,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:59:36,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:37,956 INFO L124 PetriNetUnfolderBase]: 3530/5732 cut-off events. [2024-06-14 11:59:37,956 INFO L125 PetriNetUnfolderBase]: For 1113966/1113976 co-relation queries the response was YES. [2024-06-14 11:59:38,016 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. [2024-06-14 11:59:38,040 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 347 selfloop transitions, 57 changer transitions 0/437 dead transitions. [2024-06-14 11:59:38,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 437 transitions, 5844 flow [2024-06-14 11:59:38,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:59:38,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:59:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 11:59:38,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-14 11:59:38,042 INFO L175 Difference]: Start difference. First operand has 316 places, 410 transitions, 4845 flow. Second operand 9 states and 177 transitions. [2024-06-14 11:59:38,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 437 transitions, 5844 flow [2024-06-14 11:59:40,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 437 transitions, 5634 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:40,116 INFO L231 Difference]: Finished difference. Result has 319 places, 414 transitions, 4880 flow [2024-06-14 11:59:40,117 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} [2024-06-14 11:59:40,117 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 274 predicate places. [2024-06-14 11:59:40,117 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 414 transitions, 4880 flow [2024-06-14 11:59:40,117 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) [2024-06-14 11:59:40,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:40,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:40,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 11:59:40,118 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:40,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:40,118 INFO L85 PathProgramCache]: Analyzing trace with hash 868134961, now seen corresponding path program 1 times [2024-06-14 11:59:40,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:40,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992843458] [2024-06-14 11:59:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:40,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:41,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:41,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992843458] [2024-06-14 11:59:41,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992843458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:41,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:41,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:41,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460983077] [2024-06-14 11:59:41,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:41,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:41,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:41,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:41,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:41,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:59:41,095 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) [2024-06-14 11:59:41,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:41,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:59:41,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:42,457 INFO L124 PetriNetUnfolderBase]: 3692/5935 cut-off events. [2024-06-14 11:59:42,458 INFO L125 PetriNetUnfolderBase]: For 1132366/1132370 co-relation queries the response was YES. [2024-06-14 11:59:42,521 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. [2024-06-14 11:59:42,546 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 371 selfloop transitions, 64 changer transitions 0/440 dead transitions. [2024-06-14 11:59:42,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 440 transitions, 5940 flow [2024-06-14 11:59:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:42,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:42,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 11:59:42,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 11:59:42,548 INFO L175 Difference]: Start difference. First operand has 319 places, 414 transitions, 4880 flow. Second operand 8 states and 156 transitions. [2024-06-14 11:59:42,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 440 transitions, 5940 flow [2024-06-14 11:59:44,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 440 transitions, 5723 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-14 11:59:44,754 INFO L231 Difference]: Finished difference. Result has 320 places, 418 transitions, 4928 flow [2024-06-14 11:59:44,754 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} [2024-06-14 11:59:44,755 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 275 predicate places. [2024-06-14 11:59:44,755 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 418 transitions, 4928 flow [2024-06-14 11:59:44,755 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) [2024-06-14 11:59:44,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:44,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:44,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 11:59:44,756 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:44,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:44,756 INFO L85 PathProgramCache]: Analyzing trace with hash -37340189, now seen corresponding path program 1 times [2024-06-14 11:59:44,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:44,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859881084] [2024-06-14 11:59:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:44,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:45,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:45,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859881084] [2024-06-14 11:59:45,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859881084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:45,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:45,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:45,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217278078] [2024-06-14 11:59:45,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:45,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:45,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:45,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:45,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:45,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:59:45,869 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) [2024-06-14 11:59:45,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:45,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:59:45,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:47,173 INFO L124 PetriNetUnfolderBase]: 3550/5756 cut-off events. [2024-06-14 11:59:47,173 INFO L125 PetriNetUnfolderBase]: For 1153426/1153430 co-relation queries the response was YES. [2024-06-14 11:59:47,234 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. [2024-06-14 11:59:47,258 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 345 selfloop transitions, 62 changer transitions 0/441 dead transitions. [2024-06-14 11:59:47,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 441 transitions, 5884 flow [2024-06-14 11:59:47,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:47,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 11:59:47,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-14 11:59:47,259 INFO L175 Difference]: Start difference. First operand has 320 places, 418 transitions, 4928 flow. Second operand 8 states and 158 transitions. [2024-06-14 11:59:47,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 441 transitions, 5884 flow [2024-06-14 11:59:49,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 441 transitions, 5647 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:49,335 INFO L231 Difference]: Finished difference. Result has 322 places, 422 transitions, 4916 flow [2024-06-14 11:59:49,335 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} [2024-06-14 11:59:49,335 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 277 predicate places. [2024-06-14 11:59:49,335 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 422 transitions, 4916 flow [2024-06-14 11:59:49,335 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) [2024-06-14 11:59:49,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:49,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:49,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 11:59:49,336 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:49,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:49,336 INFO L85 PathProgramCache]: Analyzing trace with hash 868314451, now seen corresponding path program 2 times [2024-06-14 11:59:49,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:49,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100113994] [2024-06-14 11:59:49,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:49,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:50,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:50,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100113994] [2024-06-14 11:59:50,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100113994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:50,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:50,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:50,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017735350] [2024-06-14 11:59:50,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:50,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:50,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:50,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:50,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:50,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:59:50,309 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) [2024-06-14 11:59:50,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:50,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:59:50,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:51,741 INFO L124 PetriNetUnfolderBase]: 3712/5963 cut-off events. [2024-06-14 11:59:51,741 INFO L125 PetriNetUnfolderBase]: For 1178752/1178756 co-relation queries the response was YES. [2024-06-14 11:59:51,798 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. [2024-06-14 11:59:51,820 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 364 selfloop transitions, 76 changer transitions 0/445 dead transitions. [2024-06-14 11:59:51,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 445 transitions, 5984 flow [2024-06-14 11:59:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:51,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 11:59:51,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 11:59:51,821 INFO L175 Difference]: Start difference. First operand has 322 places, 422 transitions, 4916 flow. Second operand 8 states and 155 transitions. [2024-06-14 11:59:51,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 445 transitions, 5984 flow [2024-06-14 11:59:53,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 445 transitions, 5813 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:53,604 INFO L231 Difference]: Finished difference. Result has 324 places, 426 transitions, 5044 flow [2024-06-14 11:59:53,605 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} [2024-06-14 11:59:53,605 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 279 predicate places. [2024-06-14 11:59:53,605 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 426 transitions, 5044 flow [2024-06-14 11:59:53,605 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) [2024-06-14 11:59:53,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:53,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:53,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 11:59:53,606 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:53,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:53,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1104786729, now seen corresponding path program 2 times [2024-06-14 11:59:53,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:53,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029500458] [2024-06-14 11:59:53,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:53,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:54,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:54,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029500458] [2024-06-14 11:59:54,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029500458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:54,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:54,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:54,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120493783] [2024-06-14 11:59:54,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:54,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:54,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:54,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:54,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:54,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:59:54,799 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) [2024-06-14 11:59:54,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:54,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:59:54,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:56,199 INFO L124 PetriNetUnfolderBase]: 3570/5789 cut-off events. [2024-06-14 11:59:56,200 INFO L125 PetriNetUnfolderBase]: For 1202539/1202543 co-relation queries the response was YES. [2024-06-14 11:59:56,255 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. [2024-06-14 11:59:56,278 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 329 selfloop transitions, 82 changer transitions 0/446 dead transitions. [2024-06-14 11:59:56,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 446 transitions, 6214 flow [2024-06-14 11:59:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:56,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:56,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 11:59:56,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-14 11:59:56,280 INFO L175 Difference]: Start difference. First operand has 324 places, 426 transitions, 5044 flow. Second operand 8 states and 158 transitions. [2024-06-14 11:59:56,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 446 transitions, 6214 flow [2024-06-14 11:59:58,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 446 transitions, 5947 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:58,146 INFO L231 Difference]: Finished difference. Result has 326 places, 430 transitions, 5045 flow [2024-06-14 11:59:58,146 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} [2024-06-14 11:59:58,146 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 281 predicate places. [2024-06-14 11:59:58,146 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 430 transitions, 5045 flow [2024-06-14 11:59:58,146 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) [2024-06-14 11:59:58,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:58,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:58,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 11:59:58,147 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:58,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:58,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1104490059, now seen corresponding path program 3 times [2024-06-14 11:59:58,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:58,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041475950] [2024-06-14 11:59:58,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:58,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:58,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:59,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:59,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041475950] [2024-06-14 11:59:59,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041475950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:59,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:59,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:59,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122244216] [2024-06-14 11:59:59,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:59,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:59,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:59,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:59,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:59,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:59:59,340 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) [2024-06-14 11:59:59,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:59,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:59:59,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:00,786 INFO L124 PetriNetUnfolderBase]: 3572/5782 cut-off events. [2024-06-14 12:00:00,786 INFO L125 PetriNetUnfolderBase]: For 1217146/1217150 co-relation queries the response was YES. [2024-06-14 12:00:00,839 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. [2024-06-14 12:00:00,861 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 347 selfloop transitions, 66 changer transitions 0/448 dead transitions. [2024-06-14 12:00:00,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 448 transitions, 5995 flow [2024-06-14 12:00:00,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:00,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:00:00,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 12:00:00,863 INFO L175 Difference]: Start difference. First operand has 326 places, 430 transitions, 5045 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:00:00,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 448 transitions, 5995 flow [2024-06-14 12:00:03,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 448 transitions, 5804 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 12:00:03,455 INFO L231 Difference]: Finished difference. Result has 329 places, 433 transitions, 5081 flow [2024-06-14 12:00:03,455 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} [2024-06-14 12:00:03,459 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-14 12:00:03,460 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 433 transitions, 5081 flow [2024-06-14 12:00:03,460 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) [2024-06-14 12:00:03,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:03,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:03,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:00:03,460 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:03,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:03,461 INFO L85 PathProgramCache]: Analyzing trace with hash -29066227, now seen corresponding path program 3 times [2024-06-14 12:00:03,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:03,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64852161] [2024-06-14 12:00:03,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:03,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:04,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:04,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64852161] [2024-06-14 12:00:04,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64852161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:04,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:04,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:04,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756332161] [2024-06-14 12:00:04,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:04,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:04,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:04,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:04,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:04,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:00:04,515 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) [2024-06-14 12:00:04,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:04,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:00:04,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:06,016 INFO L124 PetriNetUnfolderBase]: 3750/6013 cut-off events. [2024-06-14 12:00:06,016 INFO L125 PetriNetUnfolderBase]: For 1252111/1252115 co-relation queries the response was YES. [2024-06-14 12:00:06,085 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. [2024-06-14 12:00:06,112 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 374 selfloop transitions, 78 changer transitions 0/457 dead transitions. [2024-06-14 12:00:06,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 457 transitions, 6521 flow [2024-06-14 12:00:06,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:06,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:06,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:00:06,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 12:00:06,114 INFO L175 Difference]: Start difference. First operand has 329 places, 433 transitions, 5081 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:00:06,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 457 transitions, 6521 flow [2024-06-14 12:00:08,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 457 transitions, 6330 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:08,393 INFO L231 Difference]: Finished difference. Result has 331 places, 440 transitions, 5287 flow [2024-06-14 12:00:08,393 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} [2024-06-14 12:00:08,393 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 286 predicate places. [2024-06-14 12:00:08,393 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 440 transitions, 5287 flow [2024-06-14 12:00:08,393 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) [2024-06-14 12:00:08,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:08,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:08,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:00:08,394 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)] === [2024-06-14 12:00:08,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:08,395 INFO L85 PathProgramCache]: Analyzing trace with hash 651512858, now seen corresponding path program 1 times [2024-06-14 12:00:08,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:08,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033909459] [2024-06-14 12:00:08,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:08,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:09,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:09,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:09,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033909459] [2024-06-14 12:00:09,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033909459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:09,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:09,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:00:09,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324048384] [2024-06-14 12:00:09,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:09,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:00:09,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:09,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:00:09,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:00:09,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:00:09,637 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) [2024-06-14 12:00:09,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:09,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:00:09,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:11,530 INFO L124 PetriNetUnfolderBase]: 3914/6327 cut-off events. [2024-06-14 12:00:11,530 INFO L125 PetriNetUnfolderBase]: For 1316382/1316386 co-relation queries the response was YES. [2024-06-14 12:00:11,622 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. [2024-06-14 12:00:11,656 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 378 selfloop transitions, 108 changer transitions 0/491 dead transitions. [2024-06-14 12:00:11,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 491 transitions, 6575 flow [2024-06-14 12:00:11,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:00:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:00:11,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-14 12:00:11,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-14 12:00:11,658 INFO L175 Difference]: Start difference. First operand has 331 places, 440 transitions, 5287 flow. Second operand 10 states and 202 transitions. [2024-06-14 12:00:11,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 491 transitions, 6575 flow [2024-06-14 12:00:13,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 491 transitions, 6373 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-14 12:00:13,778 INFO L231 Difference]: Finished difference. Result has 339 places, 451 transitions, 5492 flow [2024-06-14 12:00:13,778 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} [2024-06-14 12:00:13,778 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 294 predicate places. [2024-06-14 12:00:13,779 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 451 transitions, 5492 flow [2024-06-14 12:00:13,779 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) [2024-06-14 12:00:13,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:13,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:13,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:00:13,779 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:13,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:13,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1104366679, now seen corresponding path program 3 times [2024-06-14 12:00:13,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:13,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578198802] [2024-06-14 12:00:13,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:13,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:14,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:14,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578198802] [2024-06-14 12:00:14,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578198802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:14,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:14,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:14,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473787860] [2024-06-14 12:00:14,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:14,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:14,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:14,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:14,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:14,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:00:14,968 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) [2024-06-14 12:00:14,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:14,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:00:14,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:16,544 INFO L124 PetriNetUnfolderBase]: 3778/6158 cut-off events. [2024-06-14 12:00:16,544 INFO L125 PetriNetUnfolderBase]: For 1320682/1320686 co-relation queries the response was YES. [2024-06-14 12:00:16,627 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. [2024-06-14 12:00:16,656 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 365 selfloop transitions, 68 changer transitions 0/470 dead transitions. [2024-06-14 12:00:16,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 470 transitions, 6534 flow [2024-06-14 12:00:16,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:16,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:16,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:00:16,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 12:00:16,658 INFO L175 Difference]: Start difference. First operand has 339 places, 451 transitions, 5492 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:00:16,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 470 transitions, 6534 flow [2024-06-14 12:00:19,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 470 transitions, 6316 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 12:00:19,493 INFO L231 Difference]: Finished difference. Result has 339 places, 454 transitions, 5554 flow [2024-06-14 12:00:19,494 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} [2024-06-14 12:00:19,494 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 294 predicate places. [2024-06-14 12:00:19,494 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 454 transitions, 5554 flow [2024-06-14 12:00:19,494 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) [2024-06-14 12:00:19,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:19,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:19,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:00:19,495 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:19,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:19,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1104379575, now seen corresponding path program 2 times [2024-06-14 12:00:19,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:19,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357797973] [2024-06-14 12:00:19,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:19,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:20,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:20,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:20,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357797973] [2024-06-14 12:00:20,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357797973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:20,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:20,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:00:20,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471132759] [2024-06-14 12:00:20,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:20,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:00:20,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:20,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:00:20,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:00:21,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:00:21,062 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) [2024-06-14 12:00:21,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:21,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:00:21,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:22,771 INFO L124 PetriNetUnfolderBase]: 3798/6186 cut-off events. [2024-06-14 12:00:22,771 INFO L125 PetriNetUnfolderBase]: For 1343440/1343444 co-relation queries the response was YES. [2024-06-14 12:00:22,856 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. [2024-06-14 12:00:22,886 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 365 selfloop transitions, 73 changer transitions 0/475 dead transitions. [2024-06-14 12:00:22,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 475 transitions, 6626 flow [2024-06-14 12:00:22,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:00:22,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:00:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 12:00:22,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-14 12:00:22,895 INFO L175 Difference]: Start difference. First operand has 339 places, 454 transitions, 5554 flow. Second operand 9 states and 173 transitions. [2024-06-14 12:00:22,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 475 transitions, 6626 flow [2024-06-14 12:00:25,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 475 transitions, 6368 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:25,382 INFO L231 Difference]: Finished difference. Result has 342 places, 458 transitions, 5597 flow [2024-06-14 12:00:25,382 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} [2024-06-14 12:00:25,383 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 297 predicate places. [2024-06-14 12:00:25,383 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 458 transitions, 5597 flow [2024-06-14 12:00:25,383 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) [2024-06-14 12:00:25,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:25,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:25,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:00:25,383 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:25,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:25,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1104783195, now seen corresponding path program 3 times [2024-06-14 12:00:25,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:25,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409390324] [2024-06-14 12:00:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:25,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:26,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:26,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409390324] [2024-06-14 12:00:26,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409390324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:26,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:26,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:00:26,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199015566] [2024-06-14 12:00:26,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:26,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:00:26,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:26,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:00:26,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:00:26,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:00:26,902 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) [2024-06-14 12:00:26,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:26,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:00:26,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:28,413 INFO L124 PetriNetUnfolderBase]: 3902/6338 cut-off events. [2024-06-14 12:00:28,413 INFO L125 PetriNetUnfolderBase]: For 1436035/1436039 co-relation queries the response was YES. [2024-06-14 12:00:28,487 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. [2024-06-14 12:00:28,521 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 359 selfloop transitions, 96 changer transitions 0/492 dead transitions. [2024-06-14 12:00:28,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 492 transitions, 7535 flow [2024-06-14 12:00:28,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:00:28,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:00:28,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-14 12:00:28,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:00:28,523 INFO L175 Difference]: Start difference. First operand has 342 places, 458 transitions, 5597 flow. Second operand 9 states and 180 transitions. [2024-06-14 12:00:28,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 492 transitions, 7535 flow [2024-06-14 12:00:31,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 492 transitions, 7270 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-14 12:00:31,141 INFO L231 Difference]: Finished difference. Result has 346 places, 470 transitions, 6029 flow [2024-06-14 12:00:31,141 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} [2024-06-14 12:00:31,141 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 301 predicate places. [2024-06-14 12:00:31,142 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 470 transitions, 6029 flow [2024-06-14 12:00:31,142 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) [2024-06-14 12:00:31,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:31,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:31,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:00:31,142 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:31,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:31,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1104797145, now seen corresponding path program 4 times [2024-06-14 12:00:31,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:31,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071400023] [2024-06-14 12:00:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:31,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:32,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:32,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071400023] [2024-06-14 12:00:32,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071400023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:32,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:32,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:00:32,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410356765] [2024-06-14 12:00:32,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:32,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:00:32,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:32,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:00:32,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:00:32,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:00:32,482 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) [2024-06-14 12:00:32,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:32,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:00:32,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:34,142 INFO L124 PetriNetUnfolderBase]: 3896/6331 cut-off events. [2024-06-14 12:00:34,142 INFO L125 PetriNetUnfolderBase]: For 1444909/1444913 co-relation queries the response was YES. [2024-06-14 12:00:34,234 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. [2024-06-14 12:00:34,268 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 358 selfloop transitions, 96 changer transitions 0/491 dead transitions. [2024-06-14 12:00:34,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 491 transitions, 7527 flow [2024-06-14 12:00:34,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:00:34,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:00:34,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-14 12:00:34,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-14 12:00:34,270 INFO L175 Difference]: Start difference. First operand has 346 places, 470 transitions, 6029 flow. Second operand 9 states and 178 transitions. [2024-06-14 12:00:34,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 491 transitions, 7527 flow [2024-06-14 12:00:36,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 491 transitions, 7165 flow, removed 144 selfloop flow, removed 4 redundant places. [2024-06-14 12:00:36,898 INFO L231 Difference]: Finished difference. Result has 351 places, 470 transitions, 5867 flow [2024-06-14 12:00:36,899 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} [2024-06-14 12:00:36,899 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 306 predicate places. [2024-06-14 12:00:36,899 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 470 transitions, 5867 flow [2024-06-14 12:00:36,899 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) [2024-06-14 12:00:36,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:36,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:36,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:00:36,900 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:36,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:36,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1104797641, now seen corresponding path program 1 times [2024-06-14 12:00:36,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:36,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538461092] [2024-06-14 12:00:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:36,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:38,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:38,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538461092] [2024-06-14 12:00:38,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538461092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:38,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:38,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:00:38,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578730333] [2024-06-14 12:00:38,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:38,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:00:38,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:38,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:00:38,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:00:38,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:00:38,947 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) [2024-06-14 12:00:38,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:38,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:00:38,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:40,527 INFO L124 PetriNetUnfolderBase]: 3891/6330 cut-off events. [2024-06-14 12:00:40,527 INFO L125 PetriNetUnfolderBase]: For 1430429/1430437 co-relation queries the response was YES. [2024-06-14 12:00:40,605 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. [2024-06-14 12:00:40,635 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 429 selfloop transitions, 25 changer transitions 0/491 dead transitions. [2024-06-14 12:00:40,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 491 transitions, 6972 flow [2024-06-14 12:00:40,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:00:40,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:00:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:00:40,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-14 12:00:40,637 INFO L175 Difference]: Start difference. First operand has 351 places, 470 transitions, 5867 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:00:40,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 491 transitions, 6972 flow [2024-06-14 12:00:43,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 491 transitions, 6745 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 12:00:43,815 INFO L231 Difference]: Finished difference. Result has 352 places, 473 transitions, 5840 flow [2024-06-14 12:00:43,815 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} [2024-06-14 12:00:43,815 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 307 predicate places. [2024-06-14 12:00:43,815 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 473 transitions, 5840 flow [2024-06-14 12:00:43,816 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) [2024-06-14 12:00:43,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:43,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:43,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:00:43,816 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:43,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:43,817 INFO L85 PathProgramCache]: Analyzing trace with hash -707166159, now seen corresponding path program 4 times [2024-06-14 12:00:43,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:43,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655251611] [2024-06-14 12:00:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:43,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:44,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:44,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655251611] [2024-06-14 12:00:44,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655251611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:44,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:44,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:44,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849106567] [2024-06-14 12:00:44,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:44,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:44,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:44,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:44,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:44,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:00:44,811 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) [2024-06-14 12:00:44,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:44,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:00:44,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:46,819 INFO L124 PetriNetUnfolderBase]: 4048/6515 cut-off events. [2024-06-14 12:00:46,820 INFO L125 PetriNetUnfolderBase]: For 1455492/1455494 co-relation queries the response was YES. [2024-06-14 12:00:46,901 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. [2024-06-14 12:00:46,940 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 429 selfloop transitions, 63 changer transitions 0/497 dead transitions. [2024-06-14 12:00:46,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 497 transitions, 7004 flow [2024-06-14 12:00:46,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:46,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:46,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:00:46,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 12:00:46,945 INFO L175 Difference]: Start difference. First operand has 352 places, 473 transitions, 5840 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:00:46,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 497 transitions, 7004 flow [2024-06-14 12:00:49,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 497 transitions, 6840 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-14 12:00:49,534 INFO L231 Difference]: Finished difference. Result has 353 places, 476 transitions, 5926 flow [2024-06-14 12:00:49,534 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} [2024-06-14 12:00:49,534 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 308 predicate places. [2024-06-14 12:00:49,534 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 476 transitions, 5926 flow [2024-06-14 12:00:49,534 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) [2024-06-14 12:00:49,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:49,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:49,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:00:49,535 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:49,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:49,535 INFO L85 PathProgramCache]: Analyzing trace with hash -479265009, now seen corresponding path program 5 times [2024-06-14 12:00:49,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:49,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613008204] [2024-06-14 12:00:49,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:49,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:50,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:50,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613008204] [2024-06-14 12:00:50,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613008204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:50,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:50,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:50,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603240804] [2024-06-14 12:00:50,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:50,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:50,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:50,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:50,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:50,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:00:50,310 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) [2024-06-14 12:00:50,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:50,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:00:50,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:51,943 INFO L124 PetriNetUnfolderBase]: 4053/6519 cut-off events. [2024-06-14 12:00:51,944 INFO L125 PetriNetUnfolderBase]: For 1483130/1483136 co-relation queries the response was YES. [2024-06-14 12:00:52,039 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. [2024-06-14 12:00:52,067 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 427 selfloop transitions, 67 changer transitions 0/499 dead transitions. [2024-06-14 12:00:52,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 499 transitions, 7094 flow [2024-06-14 12:00:52,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:52,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:52,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:00:52,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 12:00:52,069 INFO L175 Difference]: Start difference. First operand has 353 places, 476 transitions, 5926 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:00:52,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 499 transitions, 7094 flow [2024-06-14 12:00:54,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 499 transitions, 6870 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:54,877 INFO L231 Difference]: Finished difference. Result has 355 places, 479 transitions, 5966 flow [2024-06-14 12:00:54,877 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} [2024-06-14 12:00:54,877 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 310 predicate places. [2024-06-14 12:00:54,877 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 479 transitions, 5966 flow [2024-06-14 12:00:54,877 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) [2024-06-14 12:00:54,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:54,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:54,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:00:54,878 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:54,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:54,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1024646275, now seen corresponding path program 6 times [2024-06-14 12:00:54,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:54,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162304329] [2024-06-14 12:00:54,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:54,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:55,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:55,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162304329] [2024-06-14 12:00:55,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162304329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:55,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:55,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:55,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491248480] [2024-06-14 12:00:55,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:55,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:55,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:55,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:55,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:55,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:00:55,766 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) [2024-06-14 12:00:55,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:55,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:00:55,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:57,381 INFO L124 PetriNetUnfolderBase]: 4058/6526 cut-off events. [2024-06-14 12:00:57,381 INFO L125 PetriNetUnfolderBase]: For 1509246/1509252 co-relation queries the response was YES. [2024-06-14 12:00:57,463 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. [2024-06-14 12:00:57,494 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 415 selfloop transitions, 79 changer transitions 0/499 dead transitions. [2024-06-14 12:00:57,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 499 transitions, 7132 flow [2024-06-14 12:00:57,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:57,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:57,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:00:57,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:00:57,495 INFO L175 Difference]: Start difference. First operand has 355 places, 479 transitions, 5966 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:00:57,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 499 transitions, 7132 flow [2024-06-14 12:01:00,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 499 transitions, 6894 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:00,498 INFO L231 Difference]: Finished difference. Result has 357 places, 482 transitions, 6024 flow [2024-06-14 12:01:00,498 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} [2024-06-14 12:01:00,499 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 312 predicate places. [2024-06-14 12:01:00,499 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 482 transitions, 6024 flow [2024-06-14 12:01:00,499 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) [2024-06-14 12:01:00,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:00,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:00,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:01:00,499 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:00,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:00,500 INFO L85 PathProgramCache]: Analyzing trace with hash -441239765, now seen corresponding path program 7 times [2024-06-14 12:01:00,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:00,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076306856] [2024-06-14 12:01:00,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:00,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:01,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:01,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076306856] [2024-06-14 12:01:01,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076306856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:01,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:01,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:01,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334709542] [2024-06-14 12:01:01,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:01,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:01,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:01,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:01,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:01,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:01:01,526 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) [2024-06-14 12:01:01,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:01,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:01:01,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:03,198 INFO L124 PetriNetUnfolderBase]: 4055/6522 cut-off events. [2024-06-14 12:01:03,198 INFO L125 PetriNetUnfolderBase]: For 1526463/1526469 co-relation queries the response was YES. [2024-06-14 12:01:03,281 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. [2024-06-14 12:01:03,310 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 428 selfloop transitions, 70 changer transitions 0/503 dead transitions. [2024-06-14 12:01:03,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 503 transitions, 7204 flow [2024-06-14 12:01:03,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:03,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:03,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:01:03,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 12:01:03,312 INFO L175 Difference]: Start difference. First operand has 357 places, 482 transitions, 6024 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:01:03,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 503 transitions, 7204 flow [2024-06-14 12:01:06,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 503 transitions, 6930 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:06,388 INFO L231 Difference]: Finished difference. Result has 359 places, 485 transitions, 6028 flow [2024-06-14 12:01:06,389 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} [2024-06-14 12:01:06,389 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 314 predicate places. [2024-06-14 12:01:06,389 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 485 transitions, 6028 flow [2024-06-14 12:01:06,389 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) [2024-06-14 12:01:06,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:06,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:06,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:01:06,390 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:06,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:06,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1033953833, now seen corresponding path program 4 times [2024-06-14 12:01:06,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:06,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453836087] [2024-06-14 12:01:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:06,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:07,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:07,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453836087] [2024-06-14 12:01:07,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453836087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:07,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:07,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:07,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758433764] [2024-06-14 12:01:07,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:07,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:07,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:07,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:07,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:07,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:01:07,795 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) [2024-06-14 12:01:07,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:07,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:01:07,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:09,455 INFO L124 PetriNetUnfolderBase]: 3894/6321 cut-off events. [2024-06-14 12:01:09,455 INFO L125 PetriNetUnfolderBase]: For 1545345/1545351 co-relation queries the response was YES. [2024-06-14 12:01:09,537 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. [2024-06-14 12:01:09,567 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 409 selfloop transitions, 52 changer transitions 0/502 dead transitions. [2024-06-14 12:01:09,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 502 transitions, 7004 flow [2024-06-14 12:01:09,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:09,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:09,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:01:09,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 12:01:09,568 INFO L175 Difference]: Start difference. First operand has 359 places, 485 transitions, 6028 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:01:09,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 502 transitions, 7004 flow [2024-06-14 12:01:12,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 502 transitions, 6718 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:12,633 INFO L231 Difference]: Finished difference. Result has 361 places, 485 transitions, 5852 flow [2024-06-14 12:01:12,633 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} [2024-06-14 12:01:12,635 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 316 predicate places. [2024-06-14 12:01:12,648 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 485 transitions, 5852 flow [2024-06-14 12:01:12,648 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) [2024-06-14 12:01:12,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:12,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:12,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:01:12,650 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:12,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash -694964559, now seen corresponding path program 8 times [2024-06-14 12:01:12,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:12,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068139623] [2024-06-14 12:01:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:12,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:13,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:13,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068139623] [2024-06-14 12:01:13,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068139623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:13,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:13,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:13,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704098262] [2024-06-14 12:01:13,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:13,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:13,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:13,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:13,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:13,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:01:13,695 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) [2024-06-14 12:01:13,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:13,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:01:13,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:15,341 INFO L124 PetriNetUnfolderBase]: 4059/6526 cut-off events. [2024-06-14 12:01:15,342 INFO L125 PetriNetUnfolderBase]: For 1579539/1579545 co-relation queries the response was YES. [2024-06-14 12:01:15,415 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. [2024-06-14 12:01:15,444 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 397 selfloop transitions, 104 changer transitions 0/506 dead transitions. [2024-06-14 12:01:15,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 506 transitions, 7406 flow [2024-06-14 12:01:15,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:15,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:15,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:01:15,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 12:01:15,446 INFO L175 Difference]: Start difference. First operand has 361 places, 485 transitions, 5852 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:01:15,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 506 transitions, 7406 flow [2024-06-14 12:01:18,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 506 transitions, 7215 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 12:01:18,408 INFO L231 Difference]: Finished difference. Result has 361 places, 491 transitions, 6149 flow [2024-06-14 12:01:18,408 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} [2024-06-14 12:01:18,408 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 316 predicate places. [2024-06-14 12:01:18,409 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 491 transitions, 6149 flow [2024-06-14 12:01:18,409 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) [2024-06-14 12:01:18,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:18,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:18,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:01:18,409 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:18,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:18,410 INFO L85 PathProgramCache]: Analyzing trace with hash -885386843, now seen corresponding path program 5 times [2024-06-14 12:01:18,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:18,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805118582] [2024-06-14 12:01:18,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:18,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:19,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:19,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805118582] [2024-06-14 12:01:19,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805118582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:19,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:19,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:19,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791904055] [2024-06-14 12:01:19,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:19,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:19,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:19,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:19,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:19,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:01:19,732 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) [2024-06-14 12:01:19,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:19,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:01:19,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:21,542 INFO L124 PetriNetUnfolderBase]: 3912/6346 cut-off events. [2024-06-14 12:01:21,543 INFO L125 PetriNetUnfolderBase]: For 1606746/1606752 co-relation queries the response was YES. [2024-06-14 12:01:21,611 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. [2024-06-14 12:01:21,639 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 396 selfloop transitions, 69 changer transitions 0/508 dead transitions. [2024-06-14 12:01:21,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 508 transitions, 7197 flow [2024-06-14 12:01:21,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:21,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:01:21,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 12:01:21,640 INFO L175 Difference]: Start difference. First operand has 361 places, 491 transitions, 6149 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:01:21,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 508 transitions, 7197 flow [2024-06-14 12:01:25,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 508 transitions, 6929 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-06-14 12:01:25,156 INFO L231 Difference]: Finished difference. Result has 365 places, 494 transitions, 6107 flow [2024-06-14 12:01:25,157 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} [2024-06-14 12:01:25,157 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 320 predicate places. [2024-06-14 12:01:25,157 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 494 transitions, 6107 flow [2024-06-14 12:01:25,157 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) [2024-06-14 12:01:25,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:25,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:25,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:01:25,158 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:25,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:25,158 INFO L85 PathProgramCache]: Analyzing trace with hash -293204311, now seen corresponding path program 6 times [2024-06-14 12:01:25,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:25,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988326333] [2024-06-14 12:01:25,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:25,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:26,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:26,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988326333] [2024-06-14 12:01:26,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988326333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:26,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:26,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:26,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070315957] [2024-06-14 12:01:26,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:26,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:26,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:26,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:26,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:26,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:01:26,603 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) [2024-06-14 12:01:26,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:26,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:01:26,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:28,271 INFO L124 PetriNetUnfolderBase]: 3917/6353 cut-off events. [2024-06-14 12:01:28,271 INFO L125 PetriNetUnfolderBase]: For 1629957/1629963 co-relation queries the response was YES. [2024-06-14 12:01:28,351 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. [2024-06-14 12:01:28,382 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 388 selfloop transitions, 81 changer transitions 0/512 dead transitions. [2024-06-14 12:01:28,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 512 transitions, 7182 flow [2024-06-14 12:01:28,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:28,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:28,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:01:28,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 12:01:28,384 INFO L175 Difference]: Start difference. First operand has 365 places, 494 transitions, 6107 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:01:28,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 512 transitions, 7182 flow [2024-06-14 12:01:31,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 512 transitions, 6994 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:31,788 INFO L231 Difference]: Finished difference. Result has 368 places, 498 transitions, 6209 flow [2024-06-14 12:01:31,789 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} [2024-06-14 12:01:31,789 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 323 predicate places. [2024-06-14 12:01:31,789 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 498 transitions, 6209 flow [2024-06-14 12:01:31,789 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) [2024-06-14 12:01:31,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:31,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:31,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 12:01:31,790 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:31,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:31,790 INFO L85 PathProgramCache]: Analyzing trace with hash -427193045, now seen corresponding path program 9 times [2024-06-14 12:01:31,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:31,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869278875] [2024-06-14 12:01:31,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:31,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:32,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:32,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869278875] [2024-06-14 12:01:32,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869278875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:32,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:32,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:32,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896041558] [2024-06-14 12:01:32,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:32,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:32,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:32,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:32,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:32,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:01:32,925 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) [2024-06-14 12:01:32,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:32,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:01:32,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:34,608 INFO L124 PetriNetUnfolderBase]: 4066/6536 cut-off events. [2024-06-14 12:01:34,608 INFO L125 PetriNetUnfolderBase]: For 1649948/1649954 co-relation queries the response was YES. [2024-06-14 12:01:34,700 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. [2024-06-14 12:01:34,733 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 400 selfloop transitions, 107 changer transitions 0/512 dead transitions. [2024-06-14 12:01:34,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 512 transitions, 7265 flow [2024-06-14 12:01:34,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:34,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:34,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:01:34,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 12:01:34,748 INFO L175 Difference]: Start difference. First operand has 368 places, 498 transitions, 6209 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:01:34,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 512 transitions, 7265 flow [2024-06-14 12:01:37,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 512 transitions, 6960 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-14 12:01:37,997 INFO L231 Difference]: Finished difference. Result has 371 places, 498 transitions, 6124 flow [2024-06-14 12:01:37,998 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} [2024-06-14 12:01:37,998 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 326 predicate places. [2024-06-14 12:01:37,998 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 498 transitions, 6124 flow [2024-06-14 12:01:37,998 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) [2024-06-14 12:01:37,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:37,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:37,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:01:37,999 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)] === [2024-06-14 12:01:37,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:37,999 INFO L85 PathProgramCache]: Analyzing trace with hash -130491484, now seen corresponding path program 2 times [2024-06-14 12:01:38,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:38,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318771241] [2024-06-14 12:01:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:38,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:39,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:39,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318771241] [2024-06-14 12:01:39,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318771241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:39,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:39,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:01:39,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321651855] [2024-06-14 12:01:39,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:39,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:01:39,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:39,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:01:39,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:01:39,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:01:39,352 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) [2024-06-14 12:01:39,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:39,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:01:39,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:41,408 INFO L124 PetriNetUnfolderBase]: 4189/6795 cut-off events. [2024-06-14 12:01:41,408 INFO L125 PetriNetUnfolderBase]: For 1724305/1724313 co-relation queries the response was YES. [2024-06-14 12:01:41,492 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. [2024-06-14 12:01:41,524 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 435 selfloop transitions, 104 changer transitions 0/544 dead transitions. [2024-06-14 12:01:41,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 544 transitions, 7494 flow [2024-06-14 12:01:41,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:01:41,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:01:41,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-14 12:01:41,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-14 12:01:41,526 INFO L175 Difference]: Start difference. First operand has 371 places, 498 transitions, 6124 flow. Second operand 10 states and 199 transitions. [2024-06-14 12:01:41,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 544 transitions, 7494 flow [2024-06-14 12:01:45,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 544 transitions, 7262 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 12:01:45,901 INFO L231 Difference]: Finished difference. Result has 376 places, 506 transitions, 6246 flow [2024-06-14 12:01:45,902 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} [2024-06-14 12:01:45,902 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 331 predicate places. [2024-06-14 12:01:45,902 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 506 transitions, 6246 flow [2024-06-14 12:01:45,902 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) [2024-06-14 12:01:45,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:45,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:45,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:01:45,903 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)] === [2024-06-14 12:01:45,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:45,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1185003332, now seen corresponding path program 3 times [2024-06-14 12:01:45,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:45,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985559296] [2024-06-14 12:01:45,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:45,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:47,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:47,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985559296] [2024-06-14 12:01:47,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985559296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:47,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:47,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:01:47,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812569419] [2024-06-14 12:01:47,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:47,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:01:47,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:47,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:01:47,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:01:47,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:01:47,416 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) [2024-06-14 12:01:47,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:47,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:01:47,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:49,587 INFO L124 PetriNetUnfolderBase]: 4299/6995 cut-off events. [2024-06-14 12:01:49,587 INFO L125 PetriNetUnfolderBase]: For 1758381/1758389 co-relation queries the response was YES. [2024-06-14 12:01:49,675 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. [2024-06-14 12:01:49,704 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 429 selfloop transitions, 117 changer transitions 0/551 dead transitions. [2024-06-14 12:01:49,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 551 transitions, 7632 flow [2024-06-14 12:01:49,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:01:49,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:01:49,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-14 12:01:49,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-14 12:01:49,706 INFO L175 Difference]: Start difference. First operand has 376 places, 506 transitions, 6246 flow. Second operand 10 states and 197 transitions. [2024-06-14 12:01:49,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 551 transitions, 7632 flow [2024-06-14 12:01:53,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 551 transitions, 7408 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 12:01:53,708 INFO L231 Difference]: Finished difference. Result has 383 places, 514 transitions, 6429 flow [2024-06-14 12:01:53,708 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} [2024-06-14 12:01:53,708 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 338 predicate places. [2024-06-14 12:01:53,708 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 514 transitions, 6429 flow [2024-06-14 12:01:53,708 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) [2024-06-14 12:01:53,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:53,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:53,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:01:53,709 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)] === [2024-06-14 12:01:53,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:53,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1173961442, now seen corresponding path program 4 times [2024-06-14 12:01:53,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:53,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985424683] [2024-06-14 12:01:53,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:53,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:54,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:54,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985424683] [2024-06-14 12:01:54,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985424683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:54,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:54,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:01:54,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527710806] [2024-06-14 12:01:54,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:54,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:01:54,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:54,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:01:54,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:01:55,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:01:55,036 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) [2024-06-14 12:01:55,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:55,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:01:55,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:57,052 INFO L124 PetriNetUnfolderBase]: 4320/7044 cut-off events. [2024-06-14 12:01:57,052 INFO L125 PetriNetUnfolderBase]: For 1730128/1730136 co-relation queries the response was YES. [2024-06-14 12:01:57,139 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. [2024-06-14 12:01:57,171 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 416 selfloop transitions, 133 changer transitions 0/554 dead transitions. [2024-06-14 12:01:57,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 554 transitions, 7972 flow [2024-06-14 12:01:57,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:01:57,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:01:57,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-14 12:01:57,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-14 12:01:57,172 INFO L175 Difference]: Start difference. First operand has 383 places, 514 transitions, 6429 flow. Second operand 10 states and 198 transitions. [2024-06-14 12:01:57,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 554 transitions, 7972 flow [2024-06-14 12:02:00,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 554 transitions, 7781 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 12:02:00,582 INFO L231 Difference]: Finished difference. Result has 390 places, 515 transitions, 6568 flow [2024-06-14 12:02:00,583 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} [2024-06-14 12:02:00,583 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 345 predicate places. [2024-06-14 12:02:00,583 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 515 transitions, 6568 flow [2024-06-14 12:02:00,583 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) [2024-06-14 12:02:00,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:00,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:00,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:02:00,584 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)] === [2024-06-14 12:02:00,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:00,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1777625374, now seen corresponding path program 5 times [2024-06-14 12:02:00,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:00,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547716546] [2024-06-14 12:02:00,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:00,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:01,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:01,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547716546] [2024-06-14 12:02:01,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547716546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:01,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:01,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:02:01,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006784487] [2024-06-14 12:02:01,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:01,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:02:01,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:01,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:02:01,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:02:01,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:02:01,862 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) [2024-06-14 12:02:01,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:01,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:02:01,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:04,128 INFO L124 PetriNetUnfolderBase]: 4300/7012 cut-off events. [2024-06-14 12:02:04,128 INFO L125 PetriNetUnfolderBase]: For 1696511/1696519 co-relation queries the response was YES. [2024-06-14 12:02:04,217 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. [2024-06-14 12:02:04,248 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 434 selfloop transitions, 112 changer transitions 0/551 dead transitions. [2024-06-14 12:02:04,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 551 transitions, 7714 flow [2024-06-14 12:02:04,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:02:04,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:02:04,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-14 12:02:04,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-14 12:02:04,249 INFO L175 Difference]: Start difference. First operand has 390 places, 515 transitions, 6568 flow. Second operand 10 states and 197 transitions. [2024-06-14 12:02:04,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 551 transitions, 7714 flow [2024-06-14 12:02:08,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 551 transitions, 7356 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-14 12:02:08,730 INFO L231 Difference]: Finished difference. Result has 391 places, 514 transitions, 6320 flow [2024-06-14 12:02:08,730 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} [2024-06-14 12:02:08,731 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 346 predicate places. [2024-06-14 12:02:08,731 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 514 transitions, 6320 flow [2024-06-14 12:02:08,731 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) [2024-06-14 12:02:08,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:08,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:08,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:02:08,731 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:08,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:08,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1065373499, now seen corresponding path program 7 times [2024-06-14 12:02:08,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:08,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120295796] [2024-06-14 12:02:08,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:08,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:10,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:10,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120295796] [2024-06-14 12:02:10,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120295796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:10,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:10,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:02:10,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718282060] [2024-06-14 12:02:10,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:10,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:02:10,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:10,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:02:10,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:02:10,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:02:10,159 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) [2024-06-14 12:02:10,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:10,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:02:10,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:12,094 INFO L124 PetriNetUnfolderBase]: 4171/6851 cut-off events. [2024-06-14 12:02:12,094 INFO L125 PetriNetUnfolderBase]: For 1684250/1684258 co-relation queries the response was YES. [2024-06-14 12:02:12,182 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. [2024-06-14 12:02:12,214 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 396 selfloop transitions, 94 changer transitions 0/533 dead transitions. [2024-06-14 12:02:12,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 533 transitions, 7783 flow [2024-06-14 12:02:12,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:02:12,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:02:12,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:02:12,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 12:02:12,216 INFO L175 Difference]: Start difference. First operand has 391 places, 514 transitions, 6320 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:02:12,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 533 transitions, 7783 flow [2024-06-14 12:02:15,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 533 transitions, 7293 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-14 12:02:15,789 INFO L231 Difference]: Finished difference. Result has 388 places, 522 transitions, 6254 flow [2024-06-14 12:02:15,789 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} [2024-06-14 12:02:15,790 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 343 predicate places. [2024-06-14 12:02:15,790 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 522 transitions, 6254 flow [2024-06-14 12:02:15,790 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) [2024-06-14 12:02:15,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:15,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:15,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:02:15,790 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:15,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:15,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1065848977, now seen corresponding path program 10 times [2024-06-14 12:02:15,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:15,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998618533] [2024-06-14 12:02:15,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:15,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:16,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:16,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998618533] [2024-06-14 12:02:16,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998618533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:16,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:16,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:02:16,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573692829] [2024-06-14 12:02:16,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:16,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:02:16,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:16,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:02:16,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:02:16,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:02:16,948 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) [2024-06-14 12:02:16,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:16,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:02:16,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:18,943 INFO L124 PetriNetUnfolderBase]: 4342/7074 cut-off events. [2024-06-14 12:02:18,943 INFO L125 PetriNetUnfolderBase]: For 1726623/1726631 co-relation queries the response was YES. [2024-06-14 12:02:19,028 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. [2024-06-14 12:02:19,063 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 421 selfloop transitions, 122 changer transitions 0/548 dead transitions. [2024-06-14 12:02:19,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 548 transitions, 8704 flow [2024-06-14 12:02:19,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:02:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:02:19,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:02:19,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 12:02:19,064 INFO L175 Difference]: Start difference. First operand has 388 places, 522 transitions, 6254 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:02:19,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 548 transitions, 8704 flow [2024-06-14 12:02:22,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 548 transitions, 8463 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-14 12:02:22,910 INFO L231 Difference]: Finished difference. Result has 391 places, 535 transitions, 6829 flow [2024-06-14 12:02:22,910 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} [2024-06-14 12:02:22,910 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 346 predicate places. [2024-06-14 12:02:22,910 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 535 transitions, 6829 flow [2024-06-14 12:02:22,910 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) [2024-06-14 12:02:22,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:22,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:22,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:02:22,911 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:22,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:22,911 INFO L85 PathProgramCache]: Analyzing trace with hash -914395415, now seen corresponding path program 8 times [2024-06-14 12:02:22,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:22,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257284040] [2024-06-14 12:02:22,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:22,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:24,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:24,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257284040] [2024-06-14 12:02:24,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257284040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:24,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:24,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:02:24,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432936613] [2024-06-14 12:02:24,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:24,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:02:24,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:24,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:02:24,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:02:24,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:02:24,265 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) [2024-06-14 12:02:24,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:24,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:02:24,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:26,271 INFO L124 PetriNetUnfolderBase]: 4194/6885 cut-off events. [2024-06-14 12:02:26,271 INFO L125 PetriNetUnfolderBase]: For 1752797/1752805 co-relation queries the response was YES. [2024-06-14 12:02:26,349 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. [2024-06-14 12:02:26,378 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 420 selfloop transitions, 81 changer transitions 0/548 dead transitions. [2024-06-14 12:02:26,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 548 transitions, 7943 flow [2024-06-14 12:02:26,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:02:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:02:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:02:26,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:02:26,380 INFO L175 Difference]: Start difference. First operand has 391 places, 535 transitions, 6829 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:02:26,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 548 transitions, 7943 flow [2024-06-14 12:02:30,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 548 transitions, 7686 flow, removed 107 selfloop flow, removed 2 redundant places. [2024-06-14 12:02:30,246 INFO L231 Difference]: Finished difference. Result has 397 places, 538 transitions, 6833 flow [2024-06-14 12:02:30,247 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} [2024-06-14 12:02:30,272 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 352 predicate places. [2024-06-14 12:02:30,272 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 538 transitions, 6833 flow [2024-06-14 12:02:30,272 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) [2024-06-14 12:02:30,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:30,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:30,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 12:02:30,273 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:30,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:30,273 INFO L85 PathProgramCache]: Analyzing trace with hash 2136440143, now seen corresponding path program 11 times [2024-06-14 12:02:30,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:30,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649093828] [2024-06-14 12:02:30,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:30,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:31,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:31,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649093828] [2024-06-14 12:02:31,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649093828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:31,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:31,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:02:31,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976374574] [2024-06-14 12:02:31,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:31,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:02:31,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:31,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:02:31,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:02:31,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:02:31,350 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) [2024-06-14 12:02:31,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:31,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:02:31,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:33,125 INFO L124 PetriNetUnfolderBase]: 4338/7069 cut-off events. [2024-06-14 12:02:33,126 INFO L125 PetriNetUnfolderBase]: For 1751723/1751731 co-relation queries the response was YES. [2024-06-14 12:02:33,208 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. [2024-06-14 12:02:33,236 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 428 selfloop transitions, 117 changer transitions 0/550 dead transitions. [2024-06-14 12:02:33,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 550 transitions, 8477 flow [2024-06-14 12:02:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:02:33,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:02:33,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:02:33,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 12:02:33,238 INFO L175 Difference]: Start difference. First operand has 397 places, 538 transitions, 6833 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:02:33,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 550 transitions, 8477 flow [2024-06-14 12:02:36,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 550 transitions, 8148 flow, removed 86 selfloop flow, removed 6 redundant places. [2024-06-14 12:02:36,750 INFO L231 Difference]: Finished difference. Result has 399 places, 538 transitions, 6745 flow [2024-06-14 12:02:36,750 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} [2024-06-14 12:02:36,750 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 354 predicate places. [2024-06-14 12:02:36,750 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 538 transitions, 6745 flow [2024-06-14 12:02:36,750 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) [2024-06-14 12:02:36,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:36,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:36,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 12:02:36,751 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:36,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:36,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1468829815, now seen corresponding path program 9 times [2024-06-14 12:02:36,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:36,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856274712] [2024-06-14 12:02:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:36,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:37,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:37,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856274712] [2024-06-14 12:02:37,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856274712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:37,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:37,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:02:37,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236903492] [2024-06-14 12:02:37,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:37,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:02:37,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:37,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:02:37,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:02:38,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:02:38,034 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) [2024-06-14 12:02:38,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:38,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:02:38,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:39,908 INFO L124 PetriNetUnfolderBase]: 4182/6867 cut-off events. [2024-06-14 12:02:39,909 INFO L125 PetriNetUnfolderBase]: For 1756034/1756042 co-relation queries the response was YES. [2024-06-14 12:02:39,987 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. [2024-06-14 12:02:40,016 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 407 selfloop transitions, 95 changer transitions 0/549 dead transitions. [2024-06-14 12:02:40,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 549 transitions, 8041 flow [2024-06-14 12:02:40,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:02:40,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:02:40,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:02:40,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 12:02:40,018 INFO L175 Difference]: Start difference. First operand has 399 places, 538 transitions, 6745 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:02:40,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 549 transitions, 8041 flow [2024-06-14 12:02:44,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 549 transitions, 7683 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 12:02:44,646 INFO L231 Difference]: Finished difference. Result has 399 places, 538 transitions, 6586 flow [2024-06-14 12:02:44,647 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} [2024-06-14 12:02:44,647 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 354 predicate places. [2024-06-14 12:02:44,647 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 538 transitions, 6586 flow [2024-06-14 12:02:44,647 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) [2024-06-14 12:02:44,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:44,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:44,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 12:02:44,648 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:44,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:44,648 INFO L85 PathProgramCache]: Analyzing trace with hash -780273629, now seen corresponding path program 10 times [2024-06-14 12:02:44,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:44,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332301957] [2024-06-14 12:02:44,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:44,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:46,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:46,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332301957] [2024-06-14 12:02:46,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332301957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:46,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:46,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:02:46,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707377801] [2024-06-14 12:02:46,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:46,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:02:46,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:46,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:02:46,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:02:46,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:02:46,215 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) [2024-06-14 12:02:46,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:46,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:02:46,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:47,995 INFO L124 PetriNetUnfolderBase]: 4187/6876 cut-off events. [2024-06-14 12:02:47,995 INFO L125 PetriNetUnfolderBase]: For 1770219/1770227 co-relation queries the response was YES. [2024-06-14 12:02:48,074 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. [2024-06-14 12:02:48,100 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 362 selfloop transitions, 144 changer transitions 0/553 dead transitions. [2024-06-14 12:02:48,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 553 transitions, 8248 flow [2024-06-14 12:02:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:02:48,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:02:48,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:02:48,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 12:02:48,102 INFO L175 Difference]: Start difference. First operand has 399 places, 538 transitions, 6586 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:02:48,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 553 transitions, 8248 flow [2024-06-14 12:02:51,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 553 transitions, 8014 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 12:02:51,831 INFO L231 Difference]: Finished difference. Result has 402 places, 541 transitions, 6734 flow [2024-06-14 12:02:51,832 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} [2024-06-14 12:02:51,832 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 357 predicate places. [2024-06-14 12:02:51,832 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 541 transitions, 6734 flow [2024-06-14 12:02:51,832 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) [2024-06-14 12:02:51,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:51,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:51,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 12:02:51,833 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:51,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:51,833 INFO L85 PathProgramCache]: Analyzing trace with hash -785987549, now seen corresponding path program 11 times [2024-06-14 12:02:51,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:51,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76363409] [2024-06-14 12:02:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:51,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:52,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:52,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76363409] [2024-06-14 12:02:52,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76363409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:52,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:52,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:02:52,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336582334] [2024-06-14 12:02:52,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:52,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:02:52,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:52,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:02:52,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:02:53,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:02:53,072 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) [2024-06-14 12:02:53,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:53,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:02:53,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:54,831 INFO L124 PetriNetUnfolderBase]: 4179/6862 cut-off events. [2024-06-14 12:02:54,832 INFO L125 PetriNetUnfolderBase]: For 1788965/1788973 co-relation queries the response was YES. [2024-06-14 12:02:54,913 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. [2024-06-14 12:02:54,940 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 369 selfloop transitions, 136 changer transitions 0/552 dead transitions. [2024-06-14 12:02:54,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 552 transitions, 8040 flow [2024-06-14 12:02:54,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:02:54,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:02:54,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:02:54,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 12:02:54,941 INFO L175 Difference]: Start difference. First operand has 402 places, 541 transitions, 6734 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:02:54,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 552 transitions, 8040 flow [2024-06-14 12:02:58,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 552 transitions, 7558 flow, removed 82 selfloop flow, removed 8 redundant places. [2024-06-14 12:02:58,829 INFO L231 Difference]: Finished difference. Result has 402 places, 541 transitions, 6532 flow [2024-06-14 12:02:58,829 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} [2024-06-14 12:02:58,830 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 357 predicate places. [2024-06-14 12:02:58,830 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 541 transitions, 6532 flow [2024-06-14 12:02:58,830 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) [2024-06-14 12:02:58,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:58,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:58,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 12:02:58,830 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:58,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:58,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1464478593, now seen corresponding path program 12 times [2024-06-14 12:02:58,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:58,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92304186] [2024-06-14 12:02:58,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:58,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:59,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:59,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92304186] [2024-06-14 12:02:59,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92304186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:59,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:59,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:02:59,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970524165] [2024-06-14 12:02:59,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:59,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:02:59,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:59,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:02:59,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:02:59,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:02:59,826 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) [2024-06-14 12:02:59,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:59,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:02:59,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:01,754 INFO L124 PetriNetUnfolderBase]: 4326/7052 cut-off events. [2024-06-14 12:03:01,755 INFO L125 PetriNetUnfolderBase]: For 1796911/1796919 co-relation queries the response was YES. [2024-06-14 12:03:01,835 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. [2024-06-14 12:03:01,868 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 423 selfloop transitions, 124 changer transitions 0/552 dead transitions. [2024-06-14 12:03:01,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 552 transitions, 7924 flow [2024-06-14 12:03:01,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:01,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:01,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:03:01,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 12:03:01,870 INFO L175 Difference]: Start difference. First operand has 402 places, 541 transitions, 6532 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:03:01,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 552 transitions, 7924 flow [2024-06-14 12:03:06,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 552 transitions, 7536 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-14 12:03:06,121 INFO L231 Difference]: Finished difference. Result has 403 places, 541 transitions, 6398 flow [2024-06-14 12:03:06,121 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} [2024-06-14 12:03:06,122 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 358 predicate places. [2024-06-14 12:03:06,122 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 541 transitions, 6398 flow [2024-06-14 12:03:06,122 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) [2024-06-14 12:03:06,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:06,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:06,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 12:03:06,122 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:06,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:06,123 INFO L85 PathProgramCache]: Analyzing trace with hash -962425269, now seen corresponding path program 12 times [2024-06-14 12:03:06,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:06,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156178789] [2024-06-14 12:03:06,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:06,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:07,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:07,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156178789] [2024-06-14 12:03:07,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156178789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:07,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:07,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:07,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522079032] [2024-06-14 12:03:07,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:07,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:07,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:07,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:07,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:07,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:03:07,514 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) [2024-06-14 12:03:07,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:07,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:03:07,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:09,163 INFO L124 PetriNetUnfolderBase]: 4167/6844 cut-off events. [2024-06-14 12:03:09,164 INFO L125 PetriNetUnfolderBase]: For 1810629/1810637 co-relation queries the response was YES. [2024-06-14 12:03:09,249 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. [2024-06-14 12:03:09,278 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 420 selfloop transitions, 84 changer transitions 0/551 dead transitions. [2024-06-14 12:03:09,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 551 transitions, 7432 flow [2024-06-14 12:03:09,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:09,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:09,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:03:09,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 12:03:09,280 INFO L175 Difference]: Start difference. First operand has 403 places, 541 transitions, 6398 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:03:09,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 551 transitions, 7432 flow [2024-06-14 12:03:13,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 551 transitions, 7094 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-14 12:03:13,356 INFO L231 Difference]: Finished difference. Result has 403 places, 541 transitions, 6234 flow [2024-06-14 12:03:13,356 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} [2024-06-14 12:03:13,356 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 358 predicate places. [2024-06-14 12:03:13,357 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 541 transitions, 6234 flow [2024-06-14 12:03:13,357 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) [2024-06-14 12:03:13,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:13,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:13,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 12:03:13,357 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:13,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:13,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1469249865, now seen corresponding path program 4 times [2024-06-14 12:03:13,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:13,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68898012] [2024-06-14 12:03:13,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:13,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:14,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:14,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68898012] [2024-06-14 12:03:14,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68898012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:14,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:14,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:14,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303822603] [2024-06-14 12:03:14,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:14,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:14,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:14,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:14,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:14,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:03:14,506 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) [2024-06-14 12:03:14,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:14,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:03:14,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:16,168 INFO L124 PetriNetUnfolderBase]: 4172/6855 cut-off events. [2024-06-14 12:03:16,168 INFO L125 PetriNetUnfolderBase]: For 1841748/1841756 co-relation queries the response was YES. [2024-06-14 12:03:16,252 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. [2024-06-14 12:03:16,280 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 426 selfloop transitions, 82 changer transitions 0/555 dead transitions. [2024-06-14 12:03:16,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 555 transitions, 7430 flow [2024-06-14 12:03:16,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:16,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:16,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:03:16,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:03:16,281 INFO L175 Difference]: Start difference. First operand has 403 places, 541 transitions, 6234 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:03:16,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 555 transitions, 7430 flow [2024-06-14 12:03:20,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 555 transitions, 7212 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 12:03:20,034 INFO L231 Difference]: Finished difference. Result has 403 places, 544 transitions, 6344 flow [2024-06-14 12:03:20,035 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} [2024-06-14 12:03:20,035 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 358 predicate places. [2024-06-14 12:03:20,035 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 544 transitions, 6344 flow [2024-06-14 12:03:20,035 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) [2024-06-14 12:03:20,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:20,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:20,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 12:03:20,036 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:20,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:20,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1242687113, now seen corresponding path program 5 times [2024-06-14 12:03:20,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:20,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941486229] [2024-06-14 12:03:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:20,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:21,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:21,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941486229] [2024-06-14 12:03:21,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941486229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:21,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:21,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:21,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989742655] [2024-06-14 12:03:21,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:21,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:21,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:21,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:21,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:21,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:03:21,437 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) [2024-06-14 12:03:21,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:21,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:03:21,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:23,233 INFO L124 PetriNetUnfolderBase]: 4272/7001 cut-off events. [2024-06-14 12:03:23,233 INFO L125 PetriNetUnfolderBase]: For 1968863/1968871 co-relation queries the response was YES. [2024-06-14 12:03:23,320 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. [2024-06-14 12:03:23,351 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 420 selfloop transitions, 106 changer transitions 0/573 dead transitions. [2024-06-14 12:03:23,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 573 transitions, 8566 flow [2024-06-14 12:03:23,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:23,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:23,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 12:03:23,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:03:23,352 INFO L175 Difference]: Start difference. First operand has 403 places, 544 transitions, 6344 flow. Second operand 9 states and 176 transitions. [2024-06-14 12:03:23,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 573 transitions, 8566 flow [2024-06-14 12:03:28,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 573 transitions, 8260 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-14 12:03:28,245 INFO L231 Difference]: Finished difference. Result has 408 places, 556 transitions, 6793 flow [2024-06-14 12:03:28,252 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} [2024-06-14 12:03:28,253 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 363 predicate places. [2024-06-14 12:03:28,253 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 556 transitions, 6793 flow [2024-06-14 12:03:28,253 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) [2024-06-14 12:03:28,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:28,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:28,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 12:03:28,253 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:28,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:28,254 INFO L85 PathProgramCache]: Analyzing trace with hash -769787197, now seen corresponding path program 2 times [2024-06-14 12:03:28,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:28,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127272146] [2024-06-14 12:03:28,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:28,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:30,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:30,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127272146] [2024-06-14 12:03:30,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127272146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:30,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:30,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:30,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234711713] [2024-06-14 12:03:30,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:30,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:30,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:30,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:30,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:30,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:03:30,196 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) [2024-06-14 12:03:30,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:30,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:03:30,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:32,067 INFO L124 PetriNetUnfolderBase]: 4285/7017 cut-off events. [2024-06-14 12:03:32,068 INFO L125 PetriNetUnfolderBase]: For 1984923/1984925 co-relation queries the response was YES. [2024-06-14 12:03:32,161 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. [2024-06-14 12:03:32,193 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 501 selfloop transitions, 27 changer transitions 0/575 dead transitions. [2024-06-14 12:03:32,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 575 transitions, 8475 flow [2024-06-14 12:03:32,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:03:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:03:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-14 12:03:32,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39545454545454545 [2024-06-14 12:03:32,195 INFO L175 Difference]: Start difference. First operand has 408 places, 556 transitions, 6793 flow. Second operand 10 states and 174 transitions. [2024-06-14 12:03:32,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 575 transitions, 8475 flow [2024-06-14 12:03:36,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 575 transitions, 8171 flow, removed 106 selfloop flow, removed 4 redundant places. [2024-06-14 12:03:36,766 INFO L231 Difference]: Finished difference. Result has 414 places, 562 transitions, 6871 flow [2024-06-14 12:03:36,766 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} [2024-06-14 12:03:36,767 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 369 predicate places. [2024-06-14 12:03:36,767 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 562 transitions, 6871 flow [2024-06-14 12:03:36,767 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) [2024-06-14 12:03:36,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:36,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:36,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 12:03:36,767 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:36,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:36,768 INFO L85 PathProgramCache]: Analyzing trace with hash -770321947, now seen corresponding path program 3 times [2024-06-14 12:03:36,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:36,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420114981] [2024-06-14 12:03:36,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:36,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:38,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:38,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420114981] [2024-06-14 12:03:38,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420114981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:38,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:38,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:38,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627568651] [2024-06-14 12:03:38,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:38,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:38,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:38,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:38,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:38,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:03:38,662 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) [2024-06-14 12:03:38,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:38,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:03:38,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:40,458 INFO L124 PetriNetUnfolderBase]: 4282/7009 cut-off events. [2024-06-14 12:03:40,458 INFO L125 PetriNetUnfolderBase]: For 1999209/1999211 co-relation queries the response was YES. [2024-06-14 12:03:40,560 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. [2024-06-14 12:03:40,593 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 505 selfloop transitions, 21 changer transitions 0/573 dead transitions. [2024-06-14 12:03:40,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 573 transitions, 7951 flow [2024-06-14 12:03:40,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:40,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:40,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:03:40,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39646464646464646 [2024-06-14 12:03:40,594 INFO L175 Difference]: Start difference. First operand has 414 places, 562 transitions, 6871 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:03:40,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 573 transitions, 7951 flow [2024-06-14 12:03:45,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 573 transitions, 7626 flow, removed 149 selfloop flow, removed 7 redundant places. [2024-06-14 12:03:45,310 INFO L231 Difference]: Finished difference. Result has 416 places, 562 transitions, 6594 flow [2024-06-14 12:03:45,310 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} [2024-06-14 12:03:45,311 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 371 predicate places. [2024-06-14 12:03:45,311 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 562 transitions, 6594 flow [2024-06-14 12:03:45,311 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) [2024-06-14 12:03:45,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:45,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:45,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 12:03:45,311 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:45,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:45,312 INFO L85 PathProgramCache]: Analyzing trace with hash -785991083, now seen corresponding path program 6 times [2024-06-14 12:03:45,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:45,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939201330] [2024-06-14 12:03:45,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:45,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:46,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:46,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939201330] [2024-06-14 12:03:46,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939201330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:46,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:46,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:46,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573026310] [2024-06-14 12:03:46,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:46,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:46,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:46,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:46,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:46,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:03:46,724 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) [2024-06-14 12:03:46,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:46,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:03:46,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:48,467 INFO L124 PetriNetUnfolderBase]: 4316/7068 cut-off events. [2024-06-14 12:03:48,467 INFO L125 PetriNetUnfolderBase]: For 2078824/2078828 co-relation queries the response was YES. [2024-06-14 12:03:48,558 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. [2024-06-14 12:03:48,593 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 376 selfloop transitions, 172 changer transitions 0/595 dead transitions. [2024-06-14 12:03:48,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 595 transitions, 9293 flow [2024-06-14 12:03:48,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:48,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:48,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-14 12:03:48,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:03:48,594 INFO L175 Difference]: Start difference. First operand has 416 places, 562 transitions, 6594 flow. Second operand 9 states and 180 transitions. [2024-06-14 12:03:48,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 595 transitions, 9293 flow [2024-06-14 12:03:52,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 595 transitions, 9249 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:03:52,600 INFO L231 Difference]: Finished difference. Result has 420 places, 574 transitions, 7482 flow [2024-06-14 12:03:52,601 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} [2024-06-14 12:03:52,601 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 375 predicate places. [2024-06-14 12:03:52,601 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 574 transitions, 7482 flow [2024-06-14 12:03:52,601 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) [2024-06-14 12:03:52,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:52,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:52,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 12:03:52,602 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:52,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:52,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1242673163, now seen corresponding path program 7 times [2024-06-14 12:03:52,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:52,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606769046] [2024-06-14 12:03:52,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:52,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:53,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:53,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606769046] [2024-06-14 12:03:53,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606769046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:53,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:53,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:53,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571105859] [2024-06-14 12:03:53,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:53,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:53,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:53,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:53,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:53,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:03:53,950 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) [2024-06-14 12:03:53,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:53,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:03:53,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:55,723 INFO L124 PetriNetUnfolderBase]: 4308/7057 cut-off events. [2024-06-14 12:03:55,723 INFO L125 PetriNetUnfolderBase]: For 2077533/2077541 co-relation queries the response was YES. [2024-06-14 12:03:55,818 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. [2024-06-14 12:03:55,851 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 437 selfloop transitions, 105 changer transitions 0/589 dead transitions. [2024-06-14 12:03:55,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 589 transitions, 8984 flow [2024-06-14 12:03:55,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:55,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 12:03:55,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-14 12:03:55,852 INFO L175 Difference]: Start difference. First operand has 420 places, 574 transitions, 7482 flow. Second operand 9 states and 173 transitions. [2024-06-14 12:03:55,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 589 transitions, 8984 flow [2024-06-14 12:04:01,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 589 transitions, 8312 flow, removed 184 selfloop flow, removed 6 redundant places. [2024-06-14 12:04:01,107 INFO L231 Difference]: Finished difference. Result has 423 places, 574 transitions, 7029 flow [2024-06-14 12:04:01,108 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} [2024-06-14 12:04:01,108 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 378 predicate places. [2024-06-14 12:04:01,108 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 574 transitions, 7029 flow [2024-06-14 12:04:01,108 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) [2024-06-14 12:04:01,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:01,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:01,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 12:04:01,109 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:01,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:01,109 INFO L85 PathProgramCache]: Analyzing trace with hash -785976637, now seen corresponding path program 4 times [2024-06-14 12:04:01,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:01,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811105540] [2024-06-14 12:04:01,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:01,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:02,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:02,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811105540] [2024-06-14 12:04:02,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811105540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:02,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:02,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:04:02,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68543520] [2024-06-14 12:04:02,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:02,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:04:02,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:02,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:04:02,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:04:02,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:04:02,802 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) [2024-06-14 12:04:02,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:02,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:04:02,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:04,662 INFO L124 PetriNetUnfolderBase]: 4305/7057 cut-off events. [2024-06-14 12:04:04,663 INFO L125 PetriNetUnfolderBase]: For 2051834/2051848 co-relation queries the response was YES. [2024-06-14 12:04:04,761 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. [2024-06-14 12:04:04,797 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 497 selfloop transitions, 46 changer transitions 0/590 dead transitions. [2024-06-14 12:04:04,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 590 transitions, 8317 flow [2024-06-14 12:04:04,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:04:04,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:04:04,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:04:04,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 12:04:04,798 INFO L175 Difference]: Start difference. First operand has 423 places, 574 transitions, 7029 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:04:04,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 590 transitions, 8317 flow [2024-06-14 12:04:09,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 590 transitions, 8079 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 12:04:09,721 INFO L231 Difference]: Finished difference. Result has 424 places, 577 transitions, 7054 flow [2024-06-14 12:04:09,722 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} [2024-06-14 12:04:09,723 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 379 predicate places. [2024-06-14 12:04:09,723 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 577 transitions, 7054 flow [2024-06-14 12:04:09,723 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) [2024-06-14 12:04:09,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:09,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:09,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 12:04:09,744 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:09,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:09,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1139667273, now seen corresponding path program 8 times [2024-06-14 12:04:09,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:09,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247587411] [2024-06-14 12:04:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:09,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:11,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:11,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247587411] [2024-06-14 12:04:11,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247587411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:11,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:11,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:04:11,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21578338] [2024-06-14 12:04:11,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:11,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:04:11,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:11,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:04:11,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:04:11,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:04:11,360 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) [2024-06-14 12:04:11,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:11,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:04:11,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:13,182 INFO L124 PetriNetUnfolderBase]: 4307/7058 cut-off events. [2024-06-14 12:04:13,182 INFO L125 PetriNetUnfolderBase]: For 2074389/2074397 co-relation queries the response was YES. [2024-06-14 12:04:13,276 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. [2024-06-14 12:04:13,310 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 458 selfloop transitions, 87 changer transitions 0/592 dead transitions. [2024-06-14 12:04:13,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 592 transitions, 8322 flow [2024-06-14 12:04:13,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:04:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:04:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:04:13,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-14 12:04:13,311 INFO L175 Difference]: Start difference. First operand has 424 places, 577 transitions, 7054 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:04:13,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 592 transitions, 8322 flow [2024-06-14 12:04:18,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 592 transitions, 8088 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-14 12:04:18,140 INFO L231 Difference]: Finished difference. Result has 426 places, 581 transitions, 7159 flow [2024-06-14 12:04:18,140 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} [2024-06-14 12:04:18,140 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 381 predicate places. [2024-06-14 12:04:18,141 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 581 transitions, 7159 flow [2024-06-14 12:04:18,141 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) [2024-06-14 12:04:18,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:18,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:18,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 12:04:18,141 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:18,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:18,142 INFO L85 PathProgramCache]: Analyzing trace with hash -666898983, now seen corresponding path program 9 times [2024-06-14 12:04:18,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:18,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876451426] [2024-06-14 12:04:18,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:18,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:19,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:19,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876451426] [2024-06-14 12:04:19,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876451426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:19,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:19,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:04:19,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825736048] [2024-06-14 12:04:19,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:19,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:04:19,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:19,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:04:19,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:04:19,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:04:19,969 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) [2024-06-14 12:04:19,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:19,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:04:19,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:22,124 INFO L124 PetriNetUnfolderBase]: 4335/7097 cut-off events. [2024-06-14 12:04:22,125 INFO L125 PetriNetUnfolderBase]: For 2117216/2117220 co-relation queries the response was YES. [2024-06-14 12:04:22,229 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. [2024-06-14 12:04:22,263 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 513 selfloop transitions, 47 changer transitions 0/607 dead transitions. [2024-06-14 12:04:22,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 607 transitions, 8934 flow [2024-06-14 12:04:22,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:04:22,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:04:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:04:22,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:04:22,265 INFO L175 Difference]: Start difference. First operand has 426 places, 581 transitions, 7159 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:04:22,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 607 transitions, 8934 flow [2024-06-14 12:04:26,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 607 transitions, 8631 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-14 12:04:26,286 INFO L231 Difference]: Finished difference. Result has 430 places, 595 transitions, 7342 flow [2024-06-14 12:04:26,287 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} [2024-06-14 12:04:26,287 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 385 predicate places. [2024-06-14 12:04:26,287 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 595 transitions, 7342 flow [2024-06-14 12:04:26,287 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) [2024-06-14 12:04:26,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:26,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:26,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 12:04:26,288 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:26,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:26,288 INFO L85 PathProgramCache]: Analyzing trace with hash -785977133, now seen corresponding path program 10 times [2024-06-14 12:04:26,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:26,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463056581] [2024-06-14 12:04:26,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:26,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:27,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:27,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463056581] [2024-06-14 12:04:27,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463056581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:27,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:27,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:04:27,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289737081] [2024-06-14 12:04:27,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:27,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:04:27,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:27,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:04:27,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:04:27,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:04:27,638 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) [2024-06-14 12:04:27,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:27,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:04:27,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:29,661 INFO L124 PetriNetUnfolderBase]: 4357/7134 cut-off events. [2024-06-14 12:04:29,661 INFO L125 PetriNetUnfolderBase]: For 2167614/2167618 co-relation queries the response was YES. [2024-06-14 12:04:29,745 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. [2024-06-14 12:04:29,775 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 389 selfloop transitions, 185 changer transitions 0/621 dead transitions. [2024-06-14 12:04:29,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 621 transitions, 9838 flow [2024-06-14 12:04:29,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:04:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:04:29,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-14 12:04:29,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:04:29,777 INFO L175 Difference]: Start difference. First operand has 430 places, 595 transitions, 7342 flow. Second operand 9 states and 180 transitions. [2024-06-14 12:04:29,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 621 transitions, 9838 flow [2024-06-14 12:04:34,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 621 transitions, 9463 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-14 12:04:34,503 INFO L231 Difference]: Finished difference. Result has 434 places, 603 transitions, 7673 flow [2024-06-14 12:04:34,504 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} [2024-06-14 12:04:34,504 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 389 predicate places. [2024-06-14 12:04:34,504 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 603 transitions, 7673 flow [2024-06-14 12:04:34,504 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) [2024-06-14 12:04:34,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:34,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:34,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 12:04:34,505 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:34,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:34,505 INFO L85 PathProgramCache]: Analyzing trace with hash -785194257, now seen corresponding path program 1 times [2024-06-14 12:04:34,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:34,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245050647] [2024-06-14 12:04:34,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:34,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:35,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:35,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245050647] [2024-06-14 12:04:35,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245050647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:35,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:35,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:04:35,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733366207] [2024-06-14 12:04:35,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:35,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:04:35,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:35,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:04:35,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:04:35,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:04:35,772 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) [2024-06-14 12:04:35,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:35,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:04:35,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:37,727 INFO L124 PetriNetUnfolderBase]: 4368/7183 cut-off events. [2024-06-14 12:04:37,727 INFO L125 PetriNetUnfolderBase]: For 2167982/2167984 co-relation queries the response was YES. [2024-06-14 12:04:37,820 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. [2024-06-14 12:04:37,853 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 577 selfloop transitions, 21 changer transitions 0/629 dead transitions. [2024-06-14 12:04:37,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 629 transitions, 9045 flow [2024-06-14 12:04:37,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:04:37,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:04:37,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:04:37,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-14 12:04:37,855 INFO L175 Difference]: Start difference. First operand has 434 places, 603 transitions, 7673 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:04:37,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 629 transitions, 9045 flow [2024-06-14 12:04:44,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 629 transitions, 8590 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-14 12:04:44,257 INFO L231 Difference]: Finished difference. Result has 438 places, 606 transitions, 7380 flow [2024-06-14 12:04:44,257 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} [2024-06-14 12:04:44,257 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 393 predicate places. [2024-06-14 12:04:44,257 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 606 transitions, 7380 flow [2024-06-14 12:04:44,258 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) [2024-06-14 12:04:44,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:44,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:44,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 12:04:44,258 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:44,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:44,258 INFO L85 PathProgramCache]: Analyzing trace with hash -470565045, now seen corresponding path program 1 times [2024-06-14 12:04:44,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:44,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101590054] [2024-06-14 12:04:44,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:44,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:45,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:45,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101590054] [2024-06-14 12:04:45,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101590054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:45,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:45,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:04:45,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276802736] [2024-06-14 12:04:45,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:45,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:04:45,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:45,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:04:45,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:04:45,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:04:45,585 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) [2024-06-14 12:04:45,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:45,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:04:45,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:47,622 INFO L124 PetriNetUnfolderBase]: 4386/7208 cut-off events. [2024-06-14 12:04:47,623 INFO L125 PetriNetUnfolderBase]: For 2257700/2257708 co-relation queries the response was YES. [2024-06-14 12:04:47,723 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. [2024-06-14 12:04:47,760 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 579 selfloop transitions, 22 changer transitions 0/632 dead transitions. [2024-06-14 12:04:47,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 632 transitions, 8754 flow [2024-06-14 12:04:47,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:04:47,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:04:47,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:04:47,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-14 12:04:47,761 INFO L175 Difference]: Start difference. First operand has 438 places, 606 transitions, 7380 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:04:47,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 632 transitions, 8754 flow [2024-06-14 12:04:53,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 632 transitions, 8614 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-14 12:04:53,456 INFO L231 Difference]: Finished difference. Result has 440 places, 610 transitions, 7393 flow [2024-06-14 12:04:53,457 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} [2024-06-14 12:04:53,457 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 395 predicate places. [2024-06-14 12:04:53,457 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 610 transitions, 7393 flow [2024-06-14 12:04:53,457 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) [2024-06-14 12:04:53,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:53,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:53,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 12:04:53,458 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:53,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:53,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1024661899, now seen corresponding path program 2 times [2024-06-14 12:04:53,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:53,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677417016] [2024-06-14 12:04:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:53,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:54,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:54,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677417016] [2024-06-14 12:04:54,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677417016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:54,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:54,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:04:54,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234671137] [2024-06-14 12:04:54,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:54,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:04:54,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:54,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:04:54,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:04:54,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:04:54,838 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) [2024-06-14 12:04:54,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:54,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:04:54,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:56,904 INFO L124 PetriNetUnfolderBase]: 4434/7278 cut-off events. [2024-06-14 12:04:56,905 INFO L125 PetriNetUnfolderBase]: For 2326178/2326192 co-relation queries the response was YES. [2024-06-14 12:04:57,010 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. [2024-06-14 12:04:57,050 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 570 selfloop transitions, 38 changer transitions 0/639 dead transitions. [2024-06-14 12:04:57,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 639 transitions, 9188 flow [2024-06-14 12:04:57,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:04:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:04:57,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:04:57,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:04:57,052 INFO L175 Difference]: Start difference. First operand has 440 places, 610 transitions, 7393 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:04:57,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 639 transitions, 9188 flow [2024-06-14 12:05:04,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 639 transitions, 9065 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-14 12:05:04,119 INFO L231 Difference]: Finished difference. Result has 443 places, 617 transitions, 7565 flow [2024-06-14 12:05:04,119 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} [2024-06-14 12:05:04,120 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 398 predicate places. [2024-06-14 12:05:04,120 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 617 transitions, 7565 flow [2024-06-14 12:05:04,120 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) [2024-06-14 12:05:04,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:04,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:04,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 12:05:04,120 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:04,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:04,121 INFO L85 PathProgramCache]: Analyzing trace with hash -465923415, now seen corresponding path program 3 times [2024-06-14 12:05:04,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:04,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378393343] [2024-06-14 12:05:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:04,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:05,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:05,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378393343] [2024-06-14 12:05:05,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378393343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:05,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:05,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:05:05,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448257361] [2024-06-14 12:05:05,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:05,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:05:05,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:05,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:05:05,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:05:05,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:05:05,388 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) [2024-06-14 12:05:05,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:05,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:05:05,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:07,445 INFO L124 PetriNetUnfolderBase]: 4416/7254 cut-off events. [2024-06-14 12:05:07,445 INFO L125 PetriNetUnfolderBase]: For 2327598/2327606 co-relation queries the response was YES. [2024-06-14 12:05:07,544 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. [2024-06-14 12:05:07,580 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 579 selfloop transitions, 27 changer transitions 0/637 dead transitions. [2024-06-14 12:05:07,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 637 transitions, 8861 flow [2024-06-14 12:05:07,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:05:07,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:05:07,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:05:07,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-14 12:05:07,582 INFO L175 Difference]: Start difference. First operand has 443 places, 617 transitions, 7565 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:05:07,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 637 transitions, 8861 flow [2024-06-14 12:05:12,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 637 transitions, 8682 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-14 12:05:12,419 INFO L231 Difference]: Finished difference. Result has 447 places, 617 transitions, 7447 flow [2024-06-14 12:05:12,419 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} [2024-06-14 12:05:12,419 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 402 predicate places. [2024-06-14 12:05:12,420 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 617 transitions, 7447 flow [2024-06-14 12:05:12,420 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) [2024-06-14 12:05:12,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:12,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:12,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 12:05:12,420 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:12,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:12,421 INFO L85 PathProgramCache]: Analyzing trace with hash -293196375, now seen corresponding path program 4 times [2024-06-14 12:05:12,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:12,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40271159] [2024-06-14 12:05:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:12,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:13,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:13,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40271159] [2024-06-14 12:05:13,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40271159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:13,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:13,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:05:13,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546828397] [2024-06-14 12:05:13,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:13,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:05:13,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:13,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:05:13,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:05:13,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:05:13,848 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) [2024-06-14 12:05:13,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:13,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:05:13,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:15,897 INFO L124 PetriNetUnfolderBase]: 4466/7327 cut-off events. [2024-06-14 12:05:15,897 INFO L125 PetriNetUnfolderBase]: For 2391749/2391763 co-relation queries the response was YES. [2024-06-14 12:05:15,998 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. [2024-06-14 12:05:16,037 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 548 selfloop transitions, 64 changer transitions 0/643 dead transitions. [2024-06-14 12:05:16,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 643 transitions, 9563 flow [2024-06-14 12:05:16,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:05:16,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:05:16,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 12:05:16,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-14 12:05:16,038 INFO L175 Difference]: Start difference. First operand has 447 places, 617 transitions, 7447 flow. Second operand 9 states and 173 transitions. [2024-06-14 12:05:16,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 643 transitions, 9563 flow [2024-06-14 12:05:22,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 643 transitions, 9482 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 12:05:22,973 INFO L231 Difference]: Finished difference. Result has 449 places, 624 transitions, 7749 flow [2024-06-14 12:05:22,973 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} [2024-06-14 12:05:22,974 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 404 predicate places. [2024-06-14 12:05:22,974 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 624 transitions, 7749 flow [2024-06-14 12:05:22,974 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) [2024-06-14 12:05:22,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:22,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:22,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 12:05:22,974 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:22,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:22,975 INFO L85 PathProgramCache]: Analyzing trace with hash -293433525, now seen corresponding path program 5 times [2024-06-14 12:05:22,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:22,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334100296] [2024-06-14 12:05:22,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:22,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:24,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:24,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334100296] [2024-06-14 12:05:24,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334100296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:24,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:24,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:05:24,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788756415] [2024-06-14 12:05:24,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:24,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:05:24,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:24,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:05:24,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:05:24,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:05:24,436 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) [2024-06-14 12:05:24,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:24,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:05:24,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:26,420 INFO L124 PetriNetUnfolderBase]: 4465/7327 cut-off events. [2024-06-14 12:05:26,420 INFO L125 PetriNetUnfolderBase]: For 2431103/2431117 co-relation queries the response was YES. [2024-06-14 12:05:26,520 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. [2024-06-14 12:05:26,555 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 579 selfloop transitions, 34 changer transitions 0/644 dead transitions. [2024-06-14 12:05:26,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 644 transitions, 9158 flow [2024-06-14 12:05:26,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:05:26,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:05:26,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:05:26,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-14 12:05:26,556 INFO L175 Difference]: Start difference. First operand has 449 places, 624 transitions, 7749 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:05:26,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 644 transitions, 9158 flow [2024-06-14 12:05:32,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 644 transitions, 8946 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:32,852 INFO L231 Difference]: Finished difference. Result has 452 places, 627 transitions, 7719 flow [2024-06-14 12:05:32,852 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} [2024-06-14 12:05:32,852 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 407 predicate places. [2024-06-14 12:05:32,852 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 627 transitions, 7719 flow [2024-06-14 12:05:32,853 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) [2024-06-14 12:05:32,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:32,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:32,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 12:05:32,853 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:32,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:32,853 INFO L85 PathProgramCache]: Analyzing trace with hash -427177421, now seen corresponding path program 6 times [2024-06-14 12:05:32,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:32,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071474100] [2024-06-14 12:05:32,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:32,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:34,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:34,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071474100] [2024-06-14 12:05:34,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071474100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:34,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:34,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:05:34,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442839828] [2024-06-14 12:05:34,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:34,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:05:34,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:34,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:05:34,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:05:34,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:05:34,174 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) [2024-06-14 12:05:34,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:34,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:05:34,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:36,274 INFO L124 PetriNetUnfolderBase]: 4461/7321 cut-off events. [2024-06-14 12:05:36,275 INFO L125 PetriNetUnfolderBase]: For 2389119/2389133 co-relation queries the response was YES. [2024-06-14 12:05:36,375 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. [2024-06-14 12:05:36,410 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 581 selfloop transitions, 39 changer transitions 0/651 dead transitions. [2024-06-14 12:05:36,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 651 transitions, 9234 flow [2024-06-14 12:05:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:05:36,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:05:36,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:05:36,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-14 12:05:36,412 INFO L175 Difference]: Start difference. First operand has 452 places, 627 transitions, 7719 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:05:36,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 651 transitions, 9234 flow [2024-06-14 12:05:43,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 651 transitions, 8992 flow, removed 88 selfloop flow, removed 7 redundant places. [2024-06-14 12:05:43,952 INFO L231 Difference]: Finished difference. Result has 455 places, 635 transitions, 7797 flow [2024-06-14 12:05:43,953 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} [2024-06-14 12:05:43,953 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 410 predicate places. [2024-06-14 12:05:43,953 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 635 transitions, 7797 flow [2024-06-14 12:05:43,953 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) [2024-06-14 12:05:43,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:43,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:43,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 12:05:43,954 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:43,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:43,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1065365563, now seen corresponding path program 7 times [2024-06-14 12:05:43,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:43,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921166064] [2024-06-14 12:05:43,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:43,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:45,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:45,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921166064] [2024-06-14 12:05:45,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921166064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:45,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:45,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:05:45,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153379877] [2024-06-14 12:05:45,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:45,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:05:45,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:45,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:05:45,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:05:45,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:05:45,276 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) [2024-06-14 12:05:45,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:45,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:05:45,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:47,345 INFO L124 PetriNetUnfolderBase]: 4509/7393 cut-off events. [2024-06-14 12:05:47,345 INFO L125 PetriNetUnfolderBase]: For 2499556/2499572 co-relation queries the response was YES. [2024-06-14 12:05:47,451 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. [2024-06-14 12:05:47,488 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 572 selfloop transitions, 57 changer transitions 0/660 dead transitions. [2024-06-14 12:05:47,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 660 transitions, 9688 flow [2024-06-14 12:05:47,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:05:47,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:05:47,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:05:47,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 12:05:47,490 INFO L175 Difference]: Start difference. First operand has 455 places, 635 transitions, 7797 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:05:47,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 660 transitions, 9688 flow [2024-06-14 12:05:55,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 660 transitions, 9563 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 12:05:55,055 INFO L231 Difference]: Finished difference. Result has 460 places, 642 transitions, 8027 flow [2024-06-14 12:05:55,056 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} [2024-06-14 12:05:55,056 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 415 predicate places. [2024-06-14 12:05:55,056 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 642 transitions, 8027 flow [2024-06-14 12:05:55,056 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) [2024-06-14 12:05:55,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:55,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:55,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 12:05:55,057 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:55,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:55,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1065602713, now seen corresponding path program 8 times [2024-06-14 12:05:55,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:55,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574195093] [2024-06-14 12:05:55,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:55,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:56,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:56,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574195093] [2024-06-14 12:05:56,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574195093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:56,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:56,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:05:56,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003596385] [2024-06-14 12:05:56,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:56,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:05:56,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:56,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:05:56,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:05:56,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:05:56,442 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) [2024-06-14 12:05:56,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:56,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:05:56,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:58,508 INFO L124 PetriNetUnfolderBase]: 4516/7403 cut-off events. [2024-06-14 12:05:58,508 INFO L125 PetriNetUnfolderBase]: For 2539490/2539506 co-relation queries the response was YES. [2024-06-14 12:05:58,615 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. [2024-06-14 12:05:58,653 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 585 selfloop transitions, 43 changer transitions 0/659 dead transitions. [2024-06-14 12:05:58,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 659 transitions, 9464 flow [2024-06-14 12:05:58,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:05:58,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:05:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:05:58,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-14 12:05:58,654 INFO L175 Difference]: Start difference. First operand has 460 places, 642 transitions, 8027 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:05:58,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 659 transitions, 9464 flow [2024-06-14 12:06:05,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 659 transitions, 9305 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-14 12:06:05,189 INFO L231 Difference]: Finished difference. Result has 464 places, 645 transitions, 8070 flow [2024-06-14 12:06:05,189 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} [2024-06-14 12:06:05,189 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 419 predicate places. [2024-06-14 12:06:05,189 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 645 transitions, 8070 flow [2024-06-14 12:06:05,189 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) [2024-06-14 12:06:05,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:05,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:05,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 12:06:05,190 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:05,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:05,190 INFO L85 PathProgramCache]: Analyzing trace with hash -780265693, now seen corresponding path program 9 times [2024-06-14 12:06:05,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:05,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982099499] [2024-06-14 12:06:05,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:05,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:06,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:06,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982099499] [2024-06-14 12:06:06,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982099499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:06,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:06,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:06:06,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308713698] [2024-06-14 12:06:06,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:06,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:06:06,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:06,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:06:06,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:06:06,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:06:06,625 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) [2024-06-14 12:06:06,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:06,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:06:06,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:08,680 INFO L124 PetriNetUnfolderBase]: 4532/7429 cut-off events. [2024-06-14 12:06:08,681 INFO L125 PetriNetUnfolderBase]: For 2548563/2548585 co-relation queries the response was YES. [2024-06-14 12:06:08,787 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. [2024-06-14 12:06:08,826 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 515 selfloop transitions, 122 changer transitions 0/668 dead transitions. [2024-06-14 12:06:08,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 668 transitions, 9975 flow [2024-06-14 12:06:08,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:06:08,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:06:08,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:06:08,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 12:06:08,828 INFO L175 Difference]: Start difference. First operand has 464 places, 645 transitions, 8070 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:06:08,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 668 transitions, 9975 flow [2024-06-14 12:06:15,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 668 transitions, 9804 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-14 12:06:15,606 INFO L231 Difference]: Finished difference. Result has 467 places, 651 transitions, 8446 flow [2024-06-14 12:06:15,607 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} [2024-06-14 12:06:15,607 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 422 predicate places. [2024-06-14 12:06:15,607 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 651 transitions, 8446 flow [2024-06-14 12:06:15,607 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) [2024-06-14 12:06:15,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:15,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:15,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 12:06:15,608 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:15,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:15,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1065596203, now seen corresponding path program 10 times [2024-06-14 12:06:15,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:15,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819484775] [2024-06-14 12:06:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:15,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:16,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:16,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819484775] [2024-06-14 12:06:16,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819484775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:16,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:16,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:06:16,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900747368] [2024-06-14 12:06:16,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:16,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:06:16,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:16,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:06:16,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:06:16,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:06:16,942 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) [2024-06-14 12:06:16,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:16,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:06:16,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:18,976 INFO L124 PetriNetUnfolderBase]: 4536/7435 cut-off events. [2024-06-14 12:06:18,977 INFO L125 PetriNetUnfolderBase]: For 2547720/2547736 co-relation queries the response was YES. [2024-06-14 12:06:19,084 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. [2024-06-14 12:06:19,121 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 586 selfloop transitions, 50 changer transitions 0/667 dead transitions. [2024-06-14 12:06:19,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 667 transitions, 10134 flow [2024-06-14 12:06:19,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:06:19,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:06:19,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:06:19,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:06:19,123 INFO L175 Difference]: Start difference. First operand has 467 places, 651 transitions, 8446 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:06:19,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 667 transitions, 10134 flow [2024-06-14 12:06:26,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 667 transitions, 9967 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-14 12:06:26,748 INFO L231 Difference]: Finished difference. Result has 471 places, 651 transitions, 8386 flow [2024-06-14 12:06:26,748 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} [2024-06-14 12:06:26,748 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 426 predicate places. [2024-06-14 12:06:26,749 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 651 transitions, 8386 flow [2024-06-14 12:06:26,749 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) [2024-06-14 12:06:26,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:26,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:26,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 12:06:26,749 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:26,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:26,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2026418659, now seen corresponding path program 1 times [2024-06-14 12:06:26,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:26,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967026782] [2024-06-14 12:06:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:26,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:27,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:27,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967026782] [2024-06-14 12:06:27,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967026782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:27,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:27,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:06:27,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085005299] [2024-06-14 12:06:27,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:27,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:06:27,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:27,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:06:27,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:06:27,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:06:27,942 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) [2024-06-14 12:06:27,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:27,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:06:27,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:30,303 INFO L124 PetriNetUnfolderBase]: 4569/7434 cut-off events. [2024-06-14 12:06:30,304 INFO L125 PetriNetUnfolderBase]: For 2576150/2576168 co-relation queries the response was YES. [2024-06-14 12:06:30,418 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. [2024-06-14 12:06:30,697 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 582 selfloop transitions, 54 changer transitions 0/683 dead transitions. [2024-06-14 12:06:30,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 683 transitions, 9887 flow [2024-06-14 12:06:30,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:06:30,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:06:30,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-14 12:06:30,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-14 12:06:30,700 INFO L175 Difference]: Start difference. First operand has 471 places, 651 transitions, 8386 flow. Second operand 9 states and 179 transitions. [2024-06-14 12:06:30,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 683 transitions, 9887 flow [2024-06-14 12:06:37,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 683 transitions, 9701 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-14 12:06:37,338 INFO L231 Difference]: Finished difference. Result has 473 places, 654 transitions, 8458 flow [2024-06-14 12:06:37,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8200, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8458, PETRI_PLACES=473, PETRI_TRANSITIONS=654} [2024-06-14 12:06:37,338 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 428 predicate places. [2024-06-14 12:06:37,339 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 654 transitions, 8458 flow [2024-06-14 12:06:37,339 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) [2024-06-14 12:06:37,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:37,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:37,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 12:06:37,339 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:37,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:37,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2035673089, now seen corresponding path program 2 times [2024-06-14 12:06:37,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:37,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969860576] [2024-06-14 12:06:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:37,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:38,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:38,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969860576] [2024-06-14 12:06:38,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969860576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:38,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:38,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:06:38,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633258818] [2024-06-14 12:06:38,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:38,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:06:38,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:38,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:06:38,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:06:38,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:06:38,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 654 transitions, 8458 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) [2024-06-14 12:06:38,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:38,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:06:38,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:40,858 INFO L124 PetriNetUnfolderBase]: 4585/7466 cut-off events. [2024-06-14 12:06:40,859 INFO L125 PetriNetUnfolderBase]: For 2611784/2611807 co-relation queries the response was YES. [2024-06-14 12:06:40,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85371 conditions, 7466 events. 4585/7466 cut-off events. For 2611784/2611807 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 48999 event pairs, 826 based on Foata normal form. 19/7420 useless extension candidates. Maximal degree in co-relation 85142. Up to 6675 conditions per place. [2024-06-14 12:06:41,027 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 580 selfloop transitions, 55 changer transitions 0/682 dead transitions. [2024-06-14 12:06:41,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 682 transitions, 9951 flow [2024-06-14 12:06:41,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:06:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:06:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 12:06:41,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:06:41,028 INFO L175 Difference]: Start difference. First operand has 473 places, 654 transitions, 8458 flow. Second operand 9 states and 176 transitions. [2024-06-14 12:06:41,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 682 transitions, 9951 flow [2024-06-14 12:06:46,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 682 transitions, 9715 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-14 12:06:46,613 INFO L231 Difference]: Finished difference. Result has 475 places, 657 transitions, 8488 flow [2024-06-14 12:06:46,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8222, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8488, PETRI_PLACES=475, PETRI_TRANSITIONS=657} [2024-06-14 12:06:46,613 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 430 predicate places. [2024-06-14 12:06:46,614 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 657 transitions, 8488 flow [2024-06-14 12:06:46,614 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) [2024-06-14 12:06:46,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:46,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:46,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 12:06:46,614 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:46,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:46,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2094249951, now seen corresponding path program 3 times [2024-06-14 12:06:46,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:46,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151604952] [2024-06-14 12:06:46,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:46,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:47,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:47,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151604952] [2024-06-14 12:06:47,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151604952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:47,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:47,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:06:47,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748661395] [2024-06-14 12:06:47,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:47,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:06:47,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:47,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:06:47,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:06:47,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:06:47,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 657 transitions, 8488 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) [2024-06-14 12:06:47,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:47,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:06:47,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:50,029 INFO L124 PetriNetUnfolderBase]: 4601/7490 cut-off events. [2024-06-14 12:06:50,030 INFO L125 PetriNetUnfolderBase]: For 2640441/2640461 co-relation queries the response was YES. [2024-06-14 12:06:50,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85873 conditions, 7490 events. 4601/7490 cut-off events. For 2640441/2640461 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 49141 event pairs, 830 based on Foata normal form. 14/7435 useless extension candidates. Maximal degree in co-relation 85643. Up to 6709 conditions per place. [2024-06-14 12:06:50,178 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 581 selfloop transitions, 56 changer transitions 0/684 dead transitions. [2024-06-14 12:06:50,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 684 transitions, 9989 flow [2024-06-14 12:06:50,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:06:50,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:06:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 12:06:50,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:06:50,179 INFO L175 Difference]: Start difference. First operand has 475 places, 657 transitions, 8488 flow. Second operand 9 states and 176 transitions. [2024-06-14 12:06:50,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 684 transitions, 9989 flow [2024-06-14 12:06:56,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 684 transitions, 9745 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-14 12:06:56,164 INFO L231 Difference]: Finished difference. Result has 477 places, 660 transitions, 8518 flow [2024-06-14 12:06:56,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8244, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8518, PETRI_PLACES=477, PETRI_TRANSITIONS=660} [2024-06-14 12:06:56,164 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 432 predicate places. [2024-06-14 12:06:56,164 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 660 transitions, 8518 flow [2024-06-14 12:06:56,164 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) [2024-06-14 12:06:56,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:56,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:56,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 12:06:56,165 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:56,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:56,166 INFO L85 PathProgramCache]: Analyzing trace with hash 2094263839, now seen corresponding path program 1 times [2024-06-14 12:06:56,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:56,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396054791] [2024-06-14 12:06:56,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:56,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:57,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:57,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396054791] [2024-06-14 12:06:57,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396054791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:57,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:57,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:06:57,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103893067] [2024-06-14 12:06:57,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:57,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:06:57,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:57,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:06:57,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:06:57,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:06:57,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 660 transitions, 8518 flow. Second operand has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:57,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:57,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:06:57,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:00,122 INFO L124 PetriNetUnfolderBase]: 4603/7493 cut-off events. [2024-06-14 12:07:00,122 INFO L125 PetriNetUnfolderBase]: For 2634368/2634391 co-relation queries the response was YES. [2024-06-14 12:07:00,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85860 conditions, 7493 events. 4603/7493 cut-off events. For 2634368/2634391 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 49223 event pairs, 829 based on Foata normal form. 17/7445 useless extension candidates. Maximal degree in co-relation 85629. Up to 6712 conditions per place. [2024-06-14 12:07:00,263 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 580 selfloop transitions, 60 changer transitions 0/687 dead transitions. [2024-06-14 12:07:00,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 687 transitions, 10041 flow [2024-06-14 12:07:00,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:07:00,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:07:00,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 12:07:00,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-14 12:07:00,264 INFO L175 Difference]: Start difference. First operand has 477 places, 660 transitions, 8518 flow. Second operand 9 states and 177 transitions. [2024-06-14 12:07:00,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 687 transitions, 10041 flow [2024-06-14 12:07:06,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 687 transitions, 9789 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-14 12:07:06,387 INFO L231 Difference]: Finished difference. Result has 479 places, 664 transitions, 8572 flow [2024-06-14 12:07:06,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8266, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8572, PETRI_PLACES=479, PETRI_TRANSITIONS=664} [2024-06-14 12:07:06,388 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 434 predicate places. [2024-06-14 12:07:06,388 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 664 transitions, 8572 flow [2024-06-14 12:07:06,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:06,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:06,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:06,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 12:07:06,388 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:06,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:06,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1142022513, now seen corresponding path program 1 times [2024-06-14 12:07:06,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:06,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161048987] [2024-06-14 12:07:06,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:06,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:07,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:07,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161048987] [2024-06-14 12:07:07,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161048987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:07,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:07,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:07,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880990591] [2024-06-14 12:07:07,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:07,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:07,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:07,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:07,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:07,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:07:07,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 664 transitions, 8572 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:07,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:07,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:07:07,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:09,533 INFO L124 PetriNetUnfolderBase]: 4782/7718 cut-off events. [2024-06-14 12:07:09,533 INFO L125 PetriNetUnfolderBase]: For 2645583/2645587 co-relation queries the response was YES. [2024-06-14 12:07:09,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87150 conditions, 7718 events. 4782/7718 cut-off events. For 2645583/2645587 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 50053 event pairs, 894 based on Foata normal form. 3/7720 useless extension candidates. Maximal degree in co-relation 86918. Up to 7054 conditions per place. [2024-06-14 12:07:09,685 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 623 selfloop transitions, 60 changer transitions 0/688 dead transitions. [2024-06-14 12:07:09,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 688 transitions, 10095 flow [2024-06-14 12:07:09,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:09,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:09,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:07:09,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 12:07:09,687 INFO L175 Difference]: Start difference. First operand has 479 places, 664 transitions, 8572 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:07:09,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 688 transitions, 10095 flow [2024-06-14 12:07:16,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 688 transitions, 9841 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-14 12:07:16,565 INFO L231 Difference]: Finished difference. Result has 480 places, 667 transitions, 8545 flow [2024-06-14 12:07:16,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8318, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8545, PETRI_PLACES=480, PETRI_TRANSITIONS=667} [2024-06-14 12:07:16,566 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 435 predicate places. [2024-06-14 12:07:16,566 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 667 transitions, 8545 flow [2024-06-14 12:07:16,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:16,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:16,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:16,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 12:07:16,567 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:16,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:16,567 INFO L85 PathProgramCache]: Analyzing trace with hash -185554602, now seen corresponding path program 1 times [2024-06-14 12:07:16,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:16,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781180113] [2024-06-14 12:07:16,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:16,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:17,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:17,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781180113] [2024-06-14 12:07:17,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781180113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:17,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:17,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:17,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387548491] [2024-06-14 12:07:17,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:17,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:17,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:17,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:17,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:17,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:07:17,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 667 transitions, 8545 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:17,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:17,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:07:17,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:19,789 INFO L124 PetriNetUnfolderBase]: 4802/7745 cut-off events. [2024-06-14 12:07:19,789 INFO L125 PetriNetUnfolderBase]: For 2718726/2718730 co-relation queries the response was YES. [2024-06-14 12:07:19,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87677 conditions, 7745 events. 4802/7745 cut-off events. For 2718726/2718730 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 50213 event pairs, 881 based on Foata normal form. 4/7748 useless extension candidates. Maximal degree in co-relation 87444. Up to 6960 conditions per place. [2024-06-14 12:07:19,938 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 607 selfloop transitions, 86 changer transitions 0/698 dead transitions. [2024-06-14 12:07:19,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 698 transitions, 10191 flow [2024-06-14 12:07:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:07:19,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:07:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 12:07:19,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:07:19,939 INFO L175 Difference]: Start difference. First operand has 480 places, 667 transitions, 8545 flow. Second operand 9 states and 176 transitions. [2024-06-14 12:07:19,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 698 transitions, 10191 flow [2024-06-14 12:07:27,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 698 transitions, 9995 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 12:07:27,210 INFO L231 Difference]: Finished difference. Result has 483 places, 671 transitions, 8698 flow [2024-06-14 12:07:27,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8349, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8698, PETRI_PLACES=483, PETRI_TRANSITIONS=671} [2024-06-14 12:07:27,210 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 438 predicate places. [2024-06-14 12:07:27,211 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 671 transitions, 8698 flow [2024-06-14 12:07:27,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:27,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:27,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:27,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 12:07:27,211 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:27,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:27,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1142380563, now seen corresponding path program 2 times [2024-06-14 12:07:27,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:27,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578161224] [2024-06-14 12:07:27,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:27,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:28,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:28,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578161224] [2024-06-14 12:07:28,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578161224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:28,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:28,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:28,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225052778] [2024-06-14 12:07:28,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:28,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:28,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:28,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:28,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:28,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:07:28,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 671 transitions, 8698 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:28,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:28,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:07:28,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:30,484 INFO L124 PetriNetUnfolderBase]: 4815/7768 cut-off events. [2024-06-14 12:07:30,485 INFO L125 PetriNetUnfolderBase]: For 2732712/2732716 co-relation queries the response was YES. [2024-06-14 12:07:30,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89083 conditions, 7768 events. 4815/7768 cut-off events. For 2732712/2732716 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 50345 event pairs, 892 based on Foata normal form. 3/7770 useless extension candidates. Maximal degree in co-relation 88849. Up to 7082 conditions per place. [2024-06-14 12:07:30,635 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 620 selfloop transitions, 71 changer transitions 0/696 dead transitions. [2024-06-14 12:07:30,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 696 transitions, 10664 flow [2024-06-14 12:07:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:30,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:07:30,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:07:30,637 INFO L175 Difference]: Start difference. First operand has 483 places, 671 transitions, 8698 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:07:30,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 696 transitions, 10664 flow [2024-06-14 12:07:37,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 696 transitions, 10405 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-14 12:07:37,988 INFO L231 Difference]: Finished difference. Result has 485 places, 677 transitions, 8796 flow [2024-06-14 12:07:37,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8439, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8796, PETRI_PLACES=485, PETRI_TRANSITIONS=677} [2024-06-14 12:07:37,989 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 440 predicate places. [2024-06-14 12:07:37,989 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 677 transitions, 8796 flow [2024-06-14 12:07:37,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:37,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:37,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:37,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 12:07:37,989 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:37,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:37,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1147557873, now seen corresponding path program 3 times [2024-06-14 12:07:37,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:37,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285229771] [2024-06-14 12:07:37,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:37,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:38,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:38,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285229771] [2024-06-14 12:07:38,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285229771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:38,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:38,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:38,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244312271] [2024-06-14 12:07:38,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:38,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:38,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:38,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:38,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:38,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:07:38,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 677 transitions, 8796 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:38,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:38,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:07:38,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:41,762 INFO L124 PetriNetUnfolderBase]: 4812/7773 cut-off events. [2024-06-14 12:07:41,762 INFO L125 PetriNetUnfolderBase]: For 2755487/2755497 co-relation queries the response was YES. [2024-06-14 12:07:41,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88631 conditions, 7773 events. 4812/7773 cut-off events. For 2755487/2755497 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 50491 event pairs, 876 based on Foata normal form. 11/7783 useless extension candidates. Maximal degree in co-relation 88397. Up to 7096 conditions per place. [2024-06-14 12:07:41,897 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 634 selfloop transitions, 63 changer transitions 0/702 dead transitions. [2024-06-14 12:07:41,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 702 transitions, 10273 flow [2024-06-14 12:07:41,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:41,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:41,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:07:41,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-14 12:07:41,899 INFO L175 Difference]: Start difference. First operand has 485 places, 677 transitions, 8796 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:07:41,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 702 transitions, 10273 flow [2024-06-14 12:07:48,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 702 transitions, 10048 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-06-14 12:07:48,693 INFO L231 Difference]: Finished difference. Result has 489 places, 677 transitions, 8703 flow [2024-06-14 12:07:48,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8571, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8703, PETRI_PLACES=489, PETRI_TRANSITIONS=677} [2024-06-14 12:07:48,694 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 444 predicate places. [2024-06-14 12:07:48,694 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 677 transitions, 8703 flow [2024-06-14 12:07:48,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:48,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:48,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:48,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 12:07:48,694 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:48,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:48,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1142380780, now seen corresponding path program 2 times [2024-06-14 12:07:48,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:48,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928664428] [2024-06-14 12:07:48,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:48,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:49,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:49,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928664428] [2024-06-14 12:07:49,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928664428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:49,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:49,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:49,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531516757] [2024-06-14 12:07:49,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:49,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:49,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:49,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:49,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:49,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:07:49,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 677 transitions, 8703 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:49,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:49,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:07:49,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:52,778 INFO L124 PetriNetUnfolderBase]: 4832/7791 cut-off events. [2024-06-14 12:07:52,778 INFO L125 PetriNetUnfolderBase]: For 2828747/2828751 co-relation queries the response was YES. [2024-06-14 12:07:52,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89378 conditions, 7791 events. 4832/7791 cut-off events. For 2828747/2828751 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 50506 event pairs, 881 based on Foata normal form. 4/7794 useless extension candidates. Maximal degree in co-relation 89142. Up to 6984 conditions per place. [2024-06-14 12:07:52,919 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 608 selfloop transitions, 93 changer transitions 0/706 dead transitions. [2024-06-14 12:07:52,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 706 transitions, 10381 flow [2024-06-14 12:07:52,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:07:52,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:07:52,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 12:07:52,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:07:52,921 INFO L175 Difference]: Start difference. First operand has 489 places, 677 transitions, 8703 flow. Second operand 9 states and 176 transitions. [2024-06-14 12:07:52,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 706 transitions, 10381 flow [2024-06-14 12:07:59,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 706 transitions, 10226 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 12:07:59,420 INFO L231 Difference]: Finished difference. Result has 491 places, 681 transitions, 8919 flow [2024-06-14 12:07:59,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8548, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8919, PETRI_PLACES=491, PETRI_TRANSITIONS=681} [2024-06-14 12:07:59,420 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 446 predicate places. [2024-06-14 12:07:59,421 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 681 transitions, 8919 flow [2024-06-14 12:07:59,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:59,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:59,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:59,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 12:07:59,421 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:59,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:59,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1136839623, now seen corresponding path program 4 times [2024-06-14 12:07:59,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:59,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92315890] [2024-06-14 12:07:59,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:59,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:00,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:00,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92315890] [2024-06-14 12:08:00,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92315890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:00,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:00,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:08:00,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237105398] [2024-06-14 12:08:00,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:00,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:08:00,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:00,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:08:00,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:08:00,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:08:00,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 681 transitions, 8919 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:00,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:00,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:08:00,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:03,015 INFO L124 PetriNetUnfolderBase]: 4845/7825 cut-off events. [2024-06-14 12:08:03,015 INFO L125 PetriNetUnfolderBase]: For 2845878/2845888 co-relation queries the response was YES. [2024-06-14 12:08:03,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90870 conditions, 7825 events. 4845/7825 cut-off events. For 2845878/2845888 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 50930 event pairs, 876 based on Foata normal form. 11/7835 useless extension candidates. Maximal degree in co-relation 90633. Up to 7118 conditions per place. [2024-06-14 12:08:03,288 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 632 selfloop transitions, 73 changer transitions 0/710 dead transitions. [2024-06-14 12:08:03,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 710 transitions, 10952 flow [2024-06-14 12:08:03,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:08:03,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:08:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:08:03,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-14 12:08:03,290 INFO L175 Difference]: Start difference. First operand has 491 places, 681 transitions, 8919 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:08:03,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 710 transitions, 10952 flow [2024-06-14 12:08:10,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 710 transitions, 10615 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-14 12:08:10,256 INFO L231 Difference]: Finished difference. Result has 492 places, 687 transitions, 8954 flow [2024-06-14 12:08:10,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8582, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8954, PETRI_PLACES=492, PETRI_TRANSITIONS=687} [2024-06-14 12:08:10,257 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 447 predicate places. [2024-06-14 12:08:10,257 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 687 transitions, 8954 flow [2024-06-14 12:08:10,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:10,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:10,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:10,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 12:08:10,258 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:10,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:10,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1142380997, now seen corresponding path program 1 times [2024-06-14 12:08:10,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:10,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119133466] [2024-06-14 12:08:10,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:10,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:11,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:11,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119133466] [2024-06-14 12:08:11,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119133466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:11,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:11,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:08:11,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477503929] [2024-06-14 12:08:11,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:11,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:08:11,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:11,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:08:11,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:08:11,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:08:11,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 687 transitions, 8954 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:11,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:11,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:08:11,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:14,448 INFO L124 PetriNetUnfolderBase]: 4855/7825 cut-off events. [2024-06-14 12:08:14,449 INFO L125 PetriNetUnfolderBase]: For 2887062/2887066 co-relation queries the response was YES. [2024-06-14 12:08:14,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90765 conditions, 7825 events. 4855/7825 cut-off events. For 2887062/2887066 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 50726 event pairs, 875 based on Foata normal form. 4/7828 useless extension candidates. Maximal degree in co-relation 90527. Up to 7147 conditions per place. [2024-06-14 12:08:14,729 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 641 selfloop transitions, 68 changer transitions 0/714 dead transitions. [2024-06-14 12:08:14,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 714 transitions, 10588 flow [2024-06-14 12:08:14,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:08:14,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:08:14,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:08:14,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-14 12:08:14,730 INFO L175 Difference]: Start difference. First operand has 492 places, 687 transitions, 8954 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:08:14,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 714 transitions, 10588 flow [2024-06-14 12:08:21,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 714 transitions, 10423 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-14 12:08:21,987 INFO L231 Difference]: Finished difference. Result has 497 places, 691 transitions, 9086 flow [2024-06-14 12:08:21,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8789, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9086, PETRI_PLACES=497, PETRI_TRANSITIONS=691} [2024-06-14 12:08:21,988 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 452 predicate places. [2024-06-14 12:08:21,988 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 691 transitions, 9086 flow [2024-06-14 12:08:21,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:21,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:21,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:21,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 12:08:21,989 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:21,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:21,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1405240748, now seen corresponding path program 3 times [2024-06-14 12:08:21,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:21,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197835890] [2024-06-14 12:08:21,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:21,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:23,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:23,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197835890] [2024-06-14 12:08:23,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197835890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:23,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:23,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:08:23,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401168578] [2024-06-14 12:08:23,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:23,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:08:23,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:23,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:08:23,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:08:23,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:08:23,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 691 transitions, 9086 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:23,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:23,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:08:23,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:25,966 INFO L124 PetriNetUnfolderBase]: 4875/7857 cut-off events. [2024-06-14 12:08:25,967 INFO L125 PetriNetUnfolderBase]: For 2954290/2954294 co-relation queries the response was YES. [2024-06-14 12:08:26,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92148 conditions, 7857 events. 4875/7857 cut-off events. For 2954290/2954294 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 51038 event pairs, 879 based on Foata normal form. 4/7860 useless extension candidates. Maximal degree in co-relation 91908. Up to 6996 conditions per place. [2024-06-14 12:08:26,120 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 604 selfloop transitions, 108 changer transitions 0/717 dead transitions. [2024-06-14 12:08:26,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 717 transitions, 10788 flow [2024-06-14 12:08:26,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:08:26,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:08:26,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 12:08:26,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-14 12:08:26,122 INFO L175 Difference]: Start difference. First operand has 497 places, 691 transitions, 9086 flow. Second operand 9 states and 175 transitions. [2024-06-14 12:08:26,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 717 transitions, 10788 flow [2024-06-14 12:08:34,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 717 transitions, 10519 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-14 12:08:34,423 INFO L231 Difference]: Finished difference. Result has 499 places, 695 transitions, 9230 flow [2024-06-14 12:08:34,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8817, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9230, PETRI_PLACES=499, PETRI_TRANSITIONS=695} [2024-06-14 12:08:34,424 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 454 predicate places. [2024-06-14 12:08:34,424 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 695 transitions, 9230 flow [2024-06-14 12:08:34,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:34,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:34,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:34,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 12:08:34,425 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:34,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:34,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1405240965, now seen corresponding path program 2 times [2024-06-14 12:08:34,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:34,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432314387] [2024-06-14 12:08:34,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:34,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:35,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:35,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432314387] [2024-06-14 12:08:35,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432314387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:35,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:35,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:08:35,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861327717] [2024-06-14 12:08:35,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:35,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:08:35,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:35,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:08:35,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:08:35,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:08:35,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 695 transitions, 9230 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:35,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:35,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:08:35,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:38,401 INFO L124 PetriNetUnfolderBase]: 4885/7871 cut-off events. [2024-06-14 12:08:38,401 INFO L125 PetriNetUnfolderBase]: For 2971556/2971560 co-relation queries the response was YES. [2024-06-14 12:08:38,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93266 conditions, 7871 events. 4885/7871 cut-off events. For 2971556/2971560 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 51036 event pairs, 875 based on Foata normal form. 4/7874 useless extension candidates. Maximal degree in co-relation 93025. Up to 7153 conditions per place. [2024-06-14 12:08:38,549 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 634 selfloop transitions, 80 changer transitions 0/719 dead transitions. [2024-06-14 12:08:38,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 719 transitions, 10876 flow [2024-06-14 12:08:38,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:08:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:08:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:08:38,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-14 12:08:38,551 INFO L175 Difference]: Start difference. First operand has 499 places, 695 transitions, 9230 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:08:38,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 719 transitions, 10876 flow [2024-06-14 12:08:46,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 719 transitions, 10497 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-14 12:08:46,477 INFO L231 Difference]: Finished difference. Result has 501 places, 699 transitions, 9184 flow [2024-06-14 12:08:46,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8851, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9184, PETRI_PLACES=501, PETRI_TRANSITIONS=699} [2024-06-14 12:08:46,477 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 456 predicate places. [2024-06-14 12:08:46,477 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 699 transitions, 9184 flow [2024-06-14 12:08:46,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:46,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:46,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:46,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 12:08:46,478 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:46,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:46,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1405248684, now seen corresponding path program 1 times [2024-06-14 12:08:46,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:46,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228619899] [2024-06-14 12:08:46,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:46,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:47,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:47,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228619899] [2024-06-14 12:08:47,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228619899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:47,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:47,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:08:47,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953582421] [2024-06-14 12:08:47,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:47,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:08:47,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:47,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:08:47,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:08:47,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:08:47,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 699 transitions, 9184 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) [2024-06-14 12:08:47,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:47,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:08:47,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:50,663 INFO L124 PetriNetUnfolderBase]: 4723/7660 cut-off events. [2024-06-14 12:08:50,664 INFO L125 PetriNetUnfolderBase]: For 3003236/3003250 co-relation queries the response was YES. [2024-06-14 12:08:50,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92447 conditions, 7660 events. 4723/7660 cut-off events. For 3003236/3003250 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 50249 event pairs, 821 based on Foata normal form. 4/7595 useless extension candidates. Maximal degree in co-relation 92205. Up to 6842 conditions per place. [2024-06-14 12:08:50,828 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 603 selfloop transitions, 66 changer transitions 0/723 dead transitions. [2024-06-14 12:08:50,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 723 transitions, 10706 flow [2024-06-14 12:08:50,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:08:50,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:08:50,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 12:08:50,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-14 12:08:50,830 INFO L175 Difference]: Start difference. First operand has 501 places, 699 transitions, 9184 flow. Second operand 9 states and 173 transitions. [2024-06-14 12:08:50,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 723 transitions, 10706 flow [2024-06-14 12:08:58,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 723 transitions, 10401 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-14 12:08:58,841 INFO L231 Difference]: Finished difference. Result has 503 places, 703 transitions, 9150 flow [2024-06-14 12:08:58,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8879, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9150, PETRI_PLACES=503, PETRI_TRANSITIONS=703} [2024-06-14 12:08:58,841 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 458 predicate places. [2024-06-14 12:08:58,841 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 703 transitions, 9150 flow [2024-06-14 12:08:58,841 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) [2024-06-14 12:08:58,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:58,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:58,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 12:08:58,842 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:58,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:58,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1405248405, now seen corresponding path program 3 times [2024-06-14 12:08:58,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:58,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779977655] [2024-06-14 12:08:58,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:58,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:00,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:00,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:00,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779977655] [2024-06-14 12:09:00,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779977655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:00,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:00,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:09:00,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807183560] [2024-06-14 12:09:00,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:00,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:09:00,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:00,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:09:00,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:09:00,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:09:00,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 703 transitions, 9150 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:00,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:00,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:09:00,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:02,983 INFO L124 PetriNetUnfolderBase]: 4905/7895 cut-off events. [2024-06-14 12:09:02,984 INFO L125 PetriNetUnfolderBase]: For 3033394/3033398 co-relation queries the response was YES. [2024-06-14 12:09:03,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94024 conditions, 7895 events. 4905/7895 cut-off events. For 3033394/3033398 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 51159 event pairs, 870 based on Foata normal form. 4/7898 useless extension candidates. Maximal degree in co-relation 93781. Up to 7155 conditions per place. [2024-06-14 12:09:03,131 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 633 selfloop transitions, 89 changer transitions 0/727 dead transitions. [2024-06-14 12:09:03,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 727 transitions, 10820 flow [2024-06-14 12:09:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:09:03,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:09:03,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:09:03,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-14 12:09:03,133 INFO L175 Difference]: Start difference. First operand has 503 places, 703 transitions, 9150 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:09:03,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 727 transitions, 10820 flow