./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix004.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/mix004.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix004.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix004.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 14:34:48,236 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:34:48,296 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:34:48,300 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:34:48,301 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:34:48,332 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:34:48,333 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:34:48,333 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:34:48,333 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:34:48,334 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:34:48,334 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:34:48,334 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:34:48,335 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:34:48,335 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:34:48,335 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:34:48,336 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:34:48,336 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:34:48,336 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:34:48,336 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:34:48,337 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:34:48,337 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:34:48,337 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:34:48,337 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:34:48,338 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:34:48,338 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:34:48,338 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:34:48,338 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:34:48,338 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:34:48,339 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:34:48,339 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:34:48,339 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:34:48,339 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:34:48,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:34:48,340 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:34:48,340 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:34:48,340 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:34:48,340 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:34:48,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:34:48,341 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:34:48,341 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:34:48,341 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:34:48,341 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:34:48,341 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:34:48,342 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:34:48,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:34:48,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:34:48,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:34:48,561 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:34:48,561 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:34:48,562 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix004.opt.i [2024-06-04 14:34:49,509 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:34:49,768 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:34:49,779 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix004.opt.i [2024-06-04 14:34:49,789 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01f6f1516/cf257bfd532145ac9286575a7bf4f0cc/FLAGfa51fc75a [2024-06-04 14:34:49,801 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01f6f1516/cf257bfd532145ac9286575a7bf4f0cc [2024-06-04 14:34:49,804 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:34:49,804 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:34:49,805 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix004.opt.yml/witness.yml [2024-06-04 14:34:49,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:34:49,962 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:34:49,964 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:34:49,964 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:34:49,968 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:34:49,968 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:34:49" (1/2) ... [2024-06-04 14:34:49,969 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fa75a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:34:49, skipping insertion in model container [2024-06-04 14:34:49,969 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:34:49" (1/2) ... [2024-06-04 14:34:49,970 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3c18452c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:34:49, skipping insertion in model container [2024-06-04 14:34:49,971 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:34:49" (2/2) ... [2024-06-04 14:34:49,971 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fa75a95 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:34:49, skipping insertion in model container [2024-06-04 14:34:49,972 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:34:49" (2/2) ... [2024-06-04 14:34:49,972 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:34:50,091 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:34:50,093 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] ((((((((((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-04 14:34:50,093 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] ((((((((((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-04 14:34:50,093 INFO L97 edCorrectnessWitness]: Location invariant before [L879-L879] ((((((((((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-04 14:34:50,093 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] ((((((((((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-04 14:34:50,093 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:34:50,094 INFO L106 edCorrectnessWitness]: ghost_update [L872-L872] multithreaded = 1; [2024-06-04 14:34:50,130 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:34:50,400 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:34:50,413 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:34:50,567 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:34:50,592 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:34:50,594 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:34:50 WrapperNode [2024-06-04 14:34:50,594 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:34:50,595 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:34:50,595 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:34:50,595 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:34:50,600 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 04.06 02:34:50" (1/1) ... [2024-06-04 14:34:50,624 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 04.06 02:34:50" (1/1) ... [2024-06-04 14:34:50,650 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 163 [2024-06-04 14:34:50,651 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:34:50,651 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:34:50,651 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:34:50,651 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:34:50,667 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:34:50" (1/1) ... [2024-06-04 14:34:50,667 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:34:50" (1/1) ... [2024-06-04 14:34:50,681 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:34:50" (1/1) ... [2024-06-04 14:34:50,694 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]. [2024-06-04 14:34:50,694 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:34:50" (1/1) ... [2024-06-04 14:34:50,694 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:34:50" (1/1) ... [2024-06-04 14:34:50,713 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:34:50" (1/1) ... [2024-06-04 14:34:50,715 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:34:50" (1/1) ... [2024-06-04 14:34:50,716 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:34:50" (1/1) ... [2024-06-04 14:34:50,718 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:34:50" (1/1) ... [2024-06-04 14:34:50,733 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:34:50,734 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:34:50,734 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:34:50,735 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:34:50,736 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:34:50" (1/1) ... [2024-06-04 14:34:50,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:34:50,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:34:50,760 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) [2024-06-04 14:34:50,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:34:50,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:34:50,791 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:34:50,791 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:34:50,791 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:34:50,792 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:34:50,792 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:34:50,780 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 [2024-06-04 14:34:50,792 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:34:50,792 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-04 14:34:50,792 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-04 14:34:50,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:34:50,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:34:50,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:34:50,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:34:50,794 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 14:34:50,892 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:34:50,894 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:34:51,221 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:34:51,221 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:34:51,392 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:34:51,393 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:34:51,393 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:34:51 BoogieIcfgContainer [2024-06-04 14:34:51,394 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:34:51,396 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:34:51,396 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:34:51,398 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:34:51,398 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:34:49" (1/4) ... [2024-06-04 14:34:51,399 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730de897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:34:51, skipping insertion in model container [2024-06-04 14:34:51,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:34:49" (2/4) ... [2024-06-04 14:34:51,399 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730de897 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:34:51, skipping insertion in model container [2024-06-04 14:34:51,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:34:50" (3/4) ... [2024-06-04 14:34:51,400 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730de897 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:34:51, skipping insertion in model container [2024-06-04 14:34:51,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:34:51" (4/4) ... [2024-06-04 14:34:51,401 INFO L112 eAbstractionObserver]: Analyzing ICFG mix004.opt.i [2024-06-04 14:34:51,414 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:34:51,414 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-04 14:34:51,415 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:34:51,465 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:34:51,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-04 14:34:51,521 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-04 14:34:51,521 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:34:51,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 93 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 14:34:51,522 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-04 14:34:51,525 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-04 14:34:51,531 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:34:51,535 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;@6b5d6a65, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:34:51,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-04 14:34:51,538 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:34:51,539 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 14:34:51,539 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:34:51,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:34:51,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:34:51,540 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:34:51,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:34:51,543 INFO L85 PathProgramCache]: Analyzing trace with hash 29511510, now seen corresponding path program 1 times [2024-06-04 14:34:51,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:34:51,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467938750] [2024-06-04 14:34:51,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:34:51,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:34:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:34:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:34:52,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:34:52,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467938750] [2024-06-04 14:34:52,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467938750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:34:52,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:34:52,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:34:52,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278915359] [2024-06-04 14:34:52,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:34:52,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:34:52,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:34:52,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:34:52,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:34:52,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 54 [2024-06-04 14:34:52,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:34:52,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:34:52,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 54 [2024-06-04 14:34:52,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:34:53,511 INFO L124 PetriNetUnfolderBase]: 4867/7028 cut-off events. [2024-06-04 14:34:53,511 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2024-06-04 14:34:53,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13942 conditions, 7028 events. 4867/7028 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 40671 event pairs, 3534 based on Foata normal form. 1/6809 useless extension candidates. Maximal degree in co-relation 13926. Up to 6693 conditions per place. [2024-06-04 14:34:53,548 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 42 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-04 14:34:53,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 231 flow [2024-06-04 14:34:53,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:34:53,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:34:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-06-04 14:34:53,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-04 14:34:53,558 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 105 transitions. [2024-06-04 14:34:53,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 231 flow [2024-06-04 14:34:53,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 224 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 14:34:53,562 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-04 14:34:53,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-04 14:34:53,566 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-04 14:34:53,567 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-04 14:34:53,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:34:53,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:34:53,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:34:53,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:34:53,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:34:53,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:34:53,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1704151819, now seen corresponding path program 1 times [2024-06-04 14:34:53,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:34:53,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529754641] [2024-06-04 14:34:53,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:34:53,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:34:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:34:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:34:54,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:34:54,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529754641] [2024-06-04 14:34:54,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529754641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:34:54,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:34:54,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:34:54,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055194209] [2024-06-04 14:34:54,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:34:54,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:34:54,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:34:54,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:34:54,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:34:54,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-06-04 14:34:54,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:34:54,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:34:54,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-06-04 14:34:54,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:34:55,347 INFO L124 PetriNetUnfolderBase]: 5569/7858 cut-off events. [2024-06-04 14:34:55,348 INFO L125 PetriNetUnfolderBase]: For 1758/1758 co-relation queries the response was YES. [2024-06-04 14:34:55,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18047 conditions, 7858 events. 5569/7858 cut-off events. For 1758/1758 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 44525 event pairs, 3437 based on Foata normal form. 4/7817 useless extension candidates. Maximal degree in co-relation 18032. Up to 7610 conditions per place. [2024-06-04 14:34:55,387 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 53 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-04 14:34:55,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 325 flow [2024-06-04 14:34:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:34:55,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:34:55,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-06-04 14:34:55,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6203703703703703 [2024-06-04 14:34:55,389 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 134 transitions. [2024-06-04 14:34:55,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 325 flow [2024-06-04 14:34:55,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:34:55,391 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-04 14:34:55,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-04 14:34:55,392 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-04 14:34:55,392 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-04 14:34:55,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:34:55,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:34:55,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:34:55,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:34:55,393 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:34:55,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:34:55,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1871535232, now seen corresponding path program 1 times [2024-06-04 14:34:55,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:34:55,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699184850] [2024-06-04 14:34:55,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:34:55,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:34:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:34:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:34:56,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:34:56,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699184850] [2024-06-04 14:34:56,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699184850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:34:56,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:34:56,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:34:56,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210042649] [2024-06-04 14:34:56,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:34:56,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:34:56,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:34:56,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:34:56,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:34:56,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-04 14:34:56,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:34:56,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:34:56,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-04 14:34:56,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:34:57,731 INFO L124 PetriNetUnfolderBase]: 7070/9910 cut-off events. [2024-06-04 14:34:57,731 INFO L125 PetriNetUnfolderBase]: For 6002/6002 co-relation queries the response was YES. [2024-06-04 14:34:57,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25346 conditions, 9910 events. 7070/9910 cut-off events. For 6002/6002 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 55926 event pairs, 3323 based on Foata normal form. 8/9860 useless extension candidates. Maximal degree in co-relation 25329. Up to 9556 conditions per place. [2024-06-04 14:34:57,783 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 71 selfloop transitions, 16 changer transitions 0/96 dead transitions. [2024-06-04 14:34:57,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 96 transitions, 490 flow [2024-06-04 14:34:57,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:34:57,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:34:57,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-04 14:34:57,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5771604938271605 [2024-06-04 14:34:57,785 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 6 states and 187 transitions. [2024-06-04 14:34:57,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 96 transitions, 490 flow [2024-06-04 14:34:57,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 96 transitions, 462 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-04 14:34:57,788 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 245 flow [2024-06-04 14:34:57,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=245, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-04 14:34:57,789 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2024-06-04 14:34:57,789 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 245 flow [2024-06-04 14:34:57,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:34:57,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:34:57,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:34:57,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:34:57,790 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:34:57,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:34:57,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1158390029, now seen corresponding path program 1 times [2024-06-04 14:34:57,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:34:57,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560719270] [2024-06-04 14:34:57,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:34:57,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:34:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:34:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:34:58,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:34:58,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560719270] [2024-06-04 14:34:58,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560719270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:34:58,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:34:58,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:34:58,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896344676] [2024-06-04 14:34:58,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:34:58,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:34:58,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:34:58,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:34:58,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:34:58,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-04 14:34:58,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 245 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 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) [2024-06-04 14:34:58,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:34:58,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-04 14:34:58,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:34:59,787 INFO L124 PetriNetUnfolderBase]: 6156/8927 cut-off events. [2024-06-04 14:34:59,787 INFO L125 PetriNetUnfolderBase]: For 9719/9719 co-relation queries the response was YES. [2024-06-04 14:34:59,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24970 conditions, 8927 events. 6156/8927 cut-off events. For 9719/9719 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 52119 event pairs, 3157 based on Foata normal form. 3/8829 useless extension candidates. Maximal degree in co-relation 24951. Up to 8408 conditions per place. [2024-06-04 14:34:59,840 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 59 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-04 14:34:59,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 79 transitions, 449 flow [2024-06-04 14:34:59,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:34:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:34:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-06-04 14:34:59,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-06-04 14:34:59,843 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 245 flow. Second operand 5 states and 141 transitions. [2024-06-04 14:34:59,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 79 transitions, 449 flow [2024-06-04 14:34:59,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 79 transitions, 411 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 14:34:59,850 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 268 flow [2024-06-04 14:34:59,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-04 14:34:59,851 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 8 predicate places. [2024-06-04 14:34:59,851 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 268 flow [2024-06-04 14:34:59,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 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) [2024-06-04 14:34:59,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:34:59,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:34:59,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:34:59,852 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:34:59,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:34:59,853 INFO L85 PathProgramCache]: Analyzing trace with hash 433405834, now seen corresponding path program 1 times [2024-06-04 14:34:59,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:34:59,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022227765] [2024-06-04 14:34:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:34:59,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:34:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:00,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:00,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022227765] [2024-06-04 14:35:00,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022227765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:00,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:00,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:35:00,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848660807] [2024-06-04 14:35:00,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:00,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:35:00,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:00,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:35:00,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:35:00,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:35:00,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 268 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:00,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:00,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:35:00,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:02,335 INFO L124 PetriNetUnfolderBase]: 7083/9980 cut-off events. [2024-06-04 14:35:02,336 INFO L125 PetriNetUnfolderBase]: For 17563/17585 co-relation queries the response was YES. [2024-06-04 14:35:02,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30789 conditions, 9980 events. 7083/9980 cut-off events. For 17563/17585 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 56574 event pairs, 3533 based on Foata normal form. 5/9962 useless extension candidates. Maximal degree in co-relation 30768. Up to 9589 conditions per place. [2024-06-04 14:35:02,409 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 70 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-04 14:35:02,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 100 transitions, 606 flow [2024-06-04 14:35:02,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:35:02,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:35:02,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-04 14:35:02,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-04 14:35:02,413 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 268 flow. Second operand 6 states and 171 transitions. [2024-06-04 14:35:02,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 100 transitions, 606 flow [2024-06-04 14:35:02,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 100 transitions, 577 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 14:35:02,419 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 356 flow [2024-06-04 14:35:02,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=356, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2024-06-04 14:35:02,426 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 11 predicate places. [2024-06-04 14:35:02,426 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 356 flow [2024-06-04 14:35:02,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:02,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:02,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:02,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:35:02,427 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:02,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:02,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1646609038, now seen corresponding path program 2 times [2024-06-04 14:35:02,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:02,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103669374] [2024-06-04 14:35:02,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:02,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:03,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:03,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103669374] [2024-06-04 14:35:03,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103669374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:03,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:03,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:35:03,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149740935] [2024-06-04 14:35:03,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:03,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:35:03,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:03,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:35:03,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:35:03,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:35:03,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 356 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:03,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:03,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:35:03,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:04,643 INFO L124 PetriNetUnfolderBase]: 7074/9983 cut-off events. [2024-06-04 14:35:04,643 INFO L125 PetriNetUnfolderBase]: For 25680/25723 co-relation queries the response was YES. [2024-06-04 14:35:04,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33463 conditions, 9983 events. 7074/9983 cut-off events. For 25680/25723 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 56857 event pairs, 3536 based on Foata normal form. 25/9986 useless extension candidates. Maximal degree in co-relation 33441. Up to 9580 conditions per place. [2024-06-04 14:35:04,792 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 64 selfloop transitions, 21 changer transitions 0/94 dead transitions. [2024-06-04 14:35:04,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 94 transitions, 588 flow [2024-06-04 14:35:04,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:35:04,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:35:04,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-04 14:35:04,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2024-06-04 14:35:04,794 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 356 flow. Second operand 6 states and 165 transitions. [2024-06-04 14:35:04,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 94 transitions, 588 flow [2024-06-04 14:35:04,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 94 transitions, 542 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-04 14:35:04,805 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 363 flow [2024-06-04 14:35:04,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=363, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2024-06-04 14:35:04,806 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-06-04 14:35:04,806 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 363 flow [2024-06-04 14:35:04,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:04,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:04,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:04,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:35:04,807 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:04,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:04,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1608998124, now seen corresponding path program 1 times [2024-06-04 14:35:04,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:04,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511535313] [2024-06-04 14:35:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:04,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:05,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:05,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511535313] [2024-06-04 14:35:05,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511535313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:05,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:05,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:35:05,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762368795] [2024-06-04 14:35:05,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:05,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:35:05,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:05,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:35:05,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:35:05,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:35:05,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 363 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:05,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:05,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:35:05,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:07,074 INFO L124 PetriNetUnfolderBase]: 7165/10137 cut-off events. [2024-06-04 14:35:07,074 INFO L125 PetriNetUnfolderBase]: For 29411/29449 co-relation queries the response was YES. [2024-06-04 14:35:07,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34353 conditions, 10137 events. 7165/10137 cut-off events. For 29411/29449 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 57644 event pairs, 3526 based on Foata normal form. 7/10125 useless extension candidates. Maximal degree in co-relation 34329. Up to 9682 conditions per place. [2024-06-04 14:35:07,131 INFO L140 encePairwiseOnDemand]: 39/54 looper letters, 88 selfloop transitions, 32 changer transitions 0/129 dead transitions. [2024-06-04 14:35:07,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 129 transitions, 824 flow [2024-06-04 14:35:07,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:35:07,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:35:07,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-04 14:35:07,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-04 14:35:07,133 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 363 flow. Second operand 8 states and 222 transitions. [2024-06-04 14:35:07,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 129 transitions, 824 flow [2024-06-04 14:35:07,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 129 transitions, 750 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 14:35:07,147 INFO L231 Difference]: Finished difference. Result has 76 places, 89 transitions, 515 flow [2024-06-04 14:35:07,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=515, PETRI_PLACES=76, PETRI_TRANSITIONS=89} [2024-06-04 14:35:07,148 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 19 predicate places. [2024-06-04 14:35:07,148 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 89 transitions, 515 flow [2024-06-04 14:35:07,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:07,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:07,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:07,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:35:07,149 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:07,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:07,149 INFO L85 PathProgramCache]: Analyzing trace with hash -640703870, now seen corresponding path program 2 times [2024-06-04 14:35:07,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:07,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693266958] [2024-06-04 14:35:07,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:07,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:08,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:08,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693266958] [2024-06-04 14:35:08,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693266958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:08,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:08,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:35:08,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653879309] [2024-06-04 14:35:08,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:08,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:35:08,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:08,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:35:08,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:35:08,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:35:08,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 89 transitions, 515 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:08,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:08,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:35:08,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:09,926 INFO L124 PetriNetUnfolderBase]: 7187/10161 cut-off events. [2024-06-04 14:35:09,926 INFO L125 PetriNetUnfolderBase]: For 40068/40132 co-relation queries the response was YES. [2024-06-04 14:35:09,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37370 conditions, 10161 events. 7187/10161 cut-off events. For 40068/40132 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 57554 event pairs, 3446 based on Foata normal form. 11/10155 useless extension candidates. Maximal degree in co-relation 37344. Up to 9689 conditions per place. [2024-06-04 14:35:09,994 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 88 selfloop transitions, 34 changer transitions 0/131 dead transitions. [2024-06-04 14:35:09,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 131 transitions, 929 flow [2024-06-04 14:35:09,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:35:09,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:35:09,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-04 14:35:09,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-04 14:35:09,995 INFO L175 Difference]: Start difference. First operand has 76 places, 89 transitions, 515 flow. Second operand 7 states and 195 transitions. [2024-06-04 14:35:09,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 131 transitions, 929 flow [2024-06-04 14:35:10,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 131 transitions, 871 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-04 14:35:10,019 INFO L231 Difference]: Finished difference. Result has 80 places, 93 transitions, 592 flow [2024-06-04 14:35:10,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=592, PETRI_PLACES=80, PETRI_TRANSITIONS=93} [2024-06-04 14:35:10,019 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2024-06-04 14:35:10,020 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 93 transitions, 592 flow [2024-06-04 14:35:10,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:10,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:10,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:10,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:35:10,020 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:10,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:10,021 INFO L85 PathProgramCache]: Analyzing trace with hash -640583900, now seen corresponding path program 3 times [2024-06-04 14:35:10,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:10,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033170836] [2024-06-04 14:35:10,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:10,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:11,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:11,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033170836] [2024-06-04 14:35:11,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033170836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:11,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:11,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:35:11,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908954517] [2024-06-04 14:35:11,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:11,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:35:11,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:11,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:35:11,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:35:11,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:35:11,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 93 transitions, 592 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:11,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:11,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:35:11,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:12,532 INFO L124 PetriNetUnfolderBase]: 7209/10196 cut-off events. [2024-06-04 14:35:12,532 INFO L125 PetriNetUnfolderBase]: For 52633/52691 co-relation queries the response was YES. [2024-06-04 14:35:12,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40253 conditions, 10196 events. 7209/10196 cut-off events. For 52633/52691 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 57898 event pairs, 3397 based on Foata normal form. 21/10196 useless extension candidates. Maximal degree in co-relation 40226. Up to 9633 conditions per place. [2024-06-04 14:35:12,596 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 78 selfloop transitions, 50 changer transitions 0/137 dead transitions. [2024-06-04 14:35:12,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 137 transitions, 1106 flow [2024-06-04 14:35:12,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:35:12,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:35:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-04 14:35:12,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-04 14:35:12,598 INFO L175 Difference]: Start difference. First operand has 80 places, 93 transitions, 592 flow. Second operand 7 states and 199 transitions. [2024-06-04 14:35:12,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 137 transitions, 1106 flow [2024-06-04 14:35:12,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 137 transitions, 987 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-04 14:35:12,625 INFO L231 Difference]: Finished difference. Result has 82 places, 101 transitions, 698 flow [2024-06-04 14:35:12,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=698, PETRI_PLACES=82, PETRI_TRANSITIONS=101} [2024-06-04 14:35:12,626 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2024-06-04 14:35:12,626 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 101 transitions, 698 flow [2024-06-04 14:35:12,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:12,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:12,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:12,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:35:12,626 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:12,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:12,627 INFO L85 PathProgramCache]: Analyzing trace with hash -494725886, now seen corresponding path program 4 times [2024-06-04 14:35:12,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:12,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980411531] [2024-06-04 14:35:12,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:12,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:13,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:13,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980411531] [2024-06-04 14:35:13,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980411531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:13,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:13,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:35:13,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406497317] [2024-06-04 14:35:13,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:13,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:35:13,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:13,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:35:13,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:35:13,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:35:13,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 101 transitions, 698 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:13,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:13,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:35:13,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:15,047 INFO L124 PetriNetUnfolderBase]: 7200/10197 cut-off events. [2024-06-04 14:35:15,047 INFO L125 PetriNetUnfolderBase]: For 53403/53461 co-relation queries the response was YES. [2024-06-04 14:35:15,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40198 conditions, 10197 events. 7200/10197 cut-off events. For 53403/53461 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 58066 event pairs, 3404 based on Foata normal form. 19/10184 useless extension candidates. Maximal degree in co-relation 40170. Up to 9624 conditions per place. [2024-06-04 14:35:15,109 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 73 selfloop transitions, 50 changer transitions 0/132 dead transitions. [2024-06-04 14:35:15,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 132 transitions, 1042 flow [2024-06-04 14:35:15,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:35:15,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:35:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-04 14:35:15,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105820105820106 [2024-06-04 14:35:15,110 INFO L175 Difference]: Start difference. First operand has 82 places, 101 transitions, 698 flow. Second operand 7 states and 193 transitions. [2024-06-04 14:35:15,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 132 transitions, 1042 flow [2024-06-04 14:35:15,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 132 transitions, 959 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-04 14:35:15,142 INFO L231 Difference]: Finished difference. Result has 86 places, 101 transitions, 726 flow [2024-06-04 14:35:15,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=726, PETRI_PLACES=86, PETRI_TRANSITIONS=101} [2024-06-04 14:35:15,142 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 29 predicate places. [2024-06-04 14:35:15,142 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 101 transitions, 726 flow [2024-06-04 14:35:15,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:15,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:15,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:15,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:35:15,143 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:15,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:15,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1325648522, now seen corresponding path program 1 times [2024-06-04 14:35:15,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:15,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635391914] [2024-06-04 14:35:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:15,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:16,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:16,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635391914] [2024-06-04 14:35:16,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635391914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:16,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:16,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:35:16,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275243256] [2024-06-04 14:35:16,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:16,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:35:16,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:16,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:35:16,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:35:16,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:35:16,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 101 transitions, 726 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:16,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:16,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:35:16,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:17,781 INFO L124 PetriNetUnfolderBase]: 8032/11613 cut-off events. [2024-06-04 14:35:17,782 INFO L125 PetriNetUnfolderBase]: For 62308/62310 co-relation queries the response was YES. [2024-06-04 14:35:17,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45091 conditions, 11613 events. 8032/11613 cut-off events. For 62308/62310 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 67280 event pairs, 3736 based on Foata normal form. 6/11539 useless extension candidates. Maximal degree in co-relation 45061. Up to 10879 conditions per place. [2024-06-04 14:35:17,852 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 114 selfloop transitions, 17 changer transitions 0/140 dead transitions. [2024-06-04 14:35:17,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 140 transitions, 1153 flow [2024-06-04 14:35:17,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:35:17,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:35:17,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-04 14:35:17,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 14:35:17,854 INFO L175 Difference]: Start difference. First operand has 86 places, 101 transitions, 726 flow. Second operand 7 states and 189 transitions. [2024-06-04 14:35:17,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 140 transitions, 1153 flow [2024-06-04 14:35:17,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 140 transitions, 1012 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 14:35:17,900 INFO L231 Difference]: Finished difference. Result has 88 places, 108 transitions, 707 flow [2024-06-04 14:35:17,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=707, PETRI_PLACES=88, PETRI_TRANSITIONS=108} [2024-06-04 14:35:17,900 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 31 predicate places. [2024-06-04 14:35:17,900 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 108 transitions, 707 flow [2024-06-04 14:35:17,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:17,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:17,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:17,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:35:17,901 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:17,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:17,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1527903674, now seen corresponding path program 1 times [2024-06-04 14:35:17,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:17,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202445489] [2024-06-04 14:35:17,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:17,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:18,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:18,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202445489] [2024-06-04 14:35:18,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202445489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:18,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:18,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:35:18,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912082108] [2024-06-04 14:35:18,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:18,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:35:18,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:18,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:35:18,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:35:18,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:35:18,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 108 transitions, 707 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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) [2024-06-04 14:35:18,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:18,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:35:18,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:20,177 INFO L124 PetriNetUnfolderBase]: 9059/12996 cut-off events. [2024-06-04 14:35:20,177 INFO L125 PetriNetUnfolderBase]: For 86467/86487 co-relation queries the response was YES. [2024-06-04 14:35:20,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53764 conditions, 12996 events. 9059/12996 cut-off events. For 86467/86487 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 75404 event pairs, 4701 based on Foata normal form. 20/12864 useless extension candidates. Maximal degree in co-relation 53732. Up to 12368 conditions per place. [2024-06-04 14:35:20,283 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 103 selfloop transitions, 10 changer transitions 0/126 dead transitions. [2024-06-04 14:35:20,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 126 transitions, 1013 flow [2024-06-04 14:35:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:35:20,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:35:20,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-04 14:35:20,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4925925925925926 [2024-06-04 14:35:20,284 INFO L175 Difference]: Start difference. First operand has 88 places, 108 transitions, 707 flow. Second operand 5 states and 133 transitions. [2024-06-04 14:35:20,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 126 transitions, 1013 flow [2024-06-04 14:35:20,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 126 transitions, 953 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 14:35:20,340 INFO L231 Difference]: Finished difference. Result has 89 places, 112 transitions, 720 flow [2024-06-04 14:35:20,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=720, PETRI_PLACES=89, PETRI_TRANSITIONS=112} [2024-06-04 14:35:20,341 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 32 predicate places. [2024-06-04 14:35:20,341 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 112 transitions, 720 flow [2024-06-04 14:35:20,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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) [2024-06-04 14:35:20,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:20,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:20,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:35:20,341 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:20,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:20,342 INFO L85 PathProgramCache]: Analyzing trace with hash -92666598, now seen corresponding path program 1 times [2024-06-04 14:35:20,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:20,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354660392] [2024-06-04 14:35:20,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:20,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:21,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:21,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354660392] [2024-06-04 14:35:21,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354660392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:21,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:21,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:35:21,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028752091] [2024-06-04 14:35:21,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:21,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:35:21,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:21,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:35:21,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:35:21,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:35:21,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 112 transitions, 720 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:21,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:21,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:35:21,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:22,894 INFO L124 PetriNetUnfolderBase]: 9082/13211 cut-off events. [2024-06-04 14:35:22,894 INFO L125 PetriNetUnfolderBase]: For 101598/101618 co-relation queries the response was YES. [2024-06-04 14:35:22,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56958 conditions, 13211 events. 9082/13211 cut-off events. For 101598/101618 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 78232 event pairs, 4665 based on Foata normal form. 22/13203 useless extension candidates. Maximal degree in co-relation 56925. Up to 12332 conditions per place. [2024-06-04 14:35:23,002 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 108 selfloop transitions, 14 changer transitions 0/135 dead transitions. [2024-06-04 14:35:23,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 135 transitions, 1064 flow [2024-06-04 14:35:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:35:23,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:35:23,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-04 14:35:23,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845679012345679 [2024-06-04 14:35:23,004 INFO L175 Difference]: Start difference. First operand has 89 places, 112 transitions, 720 flow. Second operand 6 states and 157 transitions. [2024-06-04 14:35:23,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 135 transitions, 1064 flow [2024-06-04 14:35:23,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 135 transitions, 1021 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-04 14:35:23,086 INFO L231 Difference]: Finished difference. Result has 92 places, 116 transitions, 764 flow [2024-06-04 14:35:23,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=764, PETRI_PLACES=92, PETRI_TRANSITIONS=116} [2024-06-04 14:35:23,087 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 35 predicate places. [2024-06-04 14:35:23,087 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 116 transitions, 764 flow [2024-06-04 14:35:23,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:23,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:23,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:23,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:35:23,087 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:23,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:23,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2136348699, now seen corresponding path program 1 times [2024-06-04 14:35:23,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:23,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283105989] [2024-06-04 14:35:23,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:23,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:24,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:24,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283105989] [2024-06-04 14:35:24,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283105989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:24,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:24,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:35:24,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651249671] [2024-06-04 14:35:24,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:24,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:35:24,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:24,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:35:24,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:35:24,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:35:24,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 116 transitions, 764 flow. Second operand has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:24,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:24,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:35:24,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:26,395 INFO L124 PetriNetUnfolderBase]: 10479/14764 cut-off events. [2024-06-04 14:35:26,395 INFO L125 PetriNetUnfolderBase]: For 153845/154066 co-relation queries the response was YES. [2024-06-04 14:35:26,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71031 conditions, 14764 events. 10479/14764 cut-off events. For 153845/154066 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 86062 event pairs, 3699 based on Foata normal form. 47/14742 useless extension candidates. Maximal degree in co-relation 70997. Up to 13675 conditions per place. [2024-06-04 14:35:26,490 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 130 selfloop transitions, 41 changer transitions 0/182 dead transitions. [2024-06-04 14:35:26,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 182 transitions, 1468 flow [2024-06-04 14:35:26,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:35:26,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:35:26,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2024-06-04 14:35:26,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522633744855967 [2024-06-04 14:35:26,492 INFO L175 Difference]: Start difference. First operand has 92 places, 116 transitions, 764 flow. Second operand 9 states and 254 transitions. [2024-06-04 14:35:26,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 182 transitions, 1468 flow [2024-06-04 14:35:26,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 182 transitions, 1411 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-04 14:35:26,547 INFO L231 Difference]: Finished difference. Result has 97 places, 120 transitions, 882 flow [2024-06-04 14:35:26,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=882, PETRI_PLACES=97, PETRI_TRANSITIONS=120} [2024-06-04 14:35:26,548 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 40 predicate places. [2024-06-04 14:35:26,548 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 120 transitions, 882 flow [2024-06-04 14:35:26,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:26,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:26,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:26,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:35:26,549 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:26,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:26,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1536047103, now seen corresponding path program 2 times [2024-06-04 14:35:26,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:26,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070712722] [2024-06-04 14:35:26,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:26,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:27,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:27,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070712722] [2024-06-04 14:35:27,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070712722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:27,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:27,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:35:27,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305020853] [2024-06-04 14:35:27,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:27,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:35:27,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:27,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:35:27,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:35:27,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:35:27,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 120 transitions, 882 flow. Second operand has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:27,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:27,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:35:27,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:29,765 INFO L124 PetriNetUnfolderBase]: 10433/14726 cut-off events. [2024-06-04 14:35:29,765 INFO L125 PetriNetUnfolderBase]: For 173891/174089 co-relation queries the response was YES. [2024-06-04 14:35:29,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72751 conditions, 14726 events. 10433/14726 cut-off events. For 173891/174089 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 86025 event pairs, 4271 based on Foata normal form. 53/14716 useless extension candidates. Maximal degree in co-relation 72716. Up to 13833 conditions per place. [2024-06-04 14:35:29,884 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 122 selfloop transitions, 36 changer transitions 0/169 dead transitions. [2024-06-04 14:35:29,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 169 transitions, 1370 flow [2024-06-04 14:35:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:35:29,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:35:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-04 14:35:29,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162037037037037 [2024-06-04 14:35:29,886 INFO L175 Difference]: Start difference. First operand has 97 places, 120 transitions, 882 flow. Second operand 8 states and 223 transitions. [2024-06-04 14:35:29,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 169 transitions, 1370 flow [2024-06-04 14:35:29,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 169 transitions, 1297 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 14:35:29,971 INFO L231 Difference]: Finished difference. Result has 100 places, 120 transitions, 893 flow [2024-06-04 14:35:29,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=893, PETRI_PLACES=100, PETRI_TRANSITIONS=120} [2024-06-04 14:35:29,972 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 43 predicate places. [2024-06-04 14:35:29,972 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 120 transitions, 893 flow [2024-06-04 14:35:29,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:29,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:29,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:29,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:35:29,973 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:29,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:29,973 INFO L85 PathProgramCache]: Analyzing trace with hash -2018200569, now seen corresponding path program 3 times [2024-06-04 14:35:29,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:29,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636755299] [2024-06-04 14:35:29,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:29,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:29,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:31,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:31,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636755299] [2024-06-04 14:35:31,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636755299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:31,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:31,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:35:31,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880371898] [2024-06-04 14:35:31,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:31,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:35:31,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:31,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:35:31,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:35:31,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:35:31,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 120 transitions, 893 flow. Second operand has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:31,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:31,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:35:31,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:33,095 INFO L124 PetriNetUnfolderBase]: 10547/14893 cut-off events. [2024-06-04 14:35:33,095 INFO L125 PetriNetUnfolderBase]: For 192487/192679 co-relation queries the response was YES. [2024-06-04 14:35:33,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74848 conditions, 14893 events. 10547/14893 cut-off events. For 192487/192679 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 87033 event pairs, 4459 based on Foata normal form. 76/14898 useless extension candidates. Maximal degree in co-relation 74811. Up to 13920 conditions per place. [2024-06-04 14:35:33,358 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 100 selfloop transitions, 55 changer transitions 0/166 dead transitions. [2024-06-04 14:35:33,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 166 transitions, 1395 flow [2024-06-04 14:35:33,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:35:33,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:35:33,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-04 14:35:33,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-04 14:35:33,361 INFO L175 Difference]: Start difference. First operand has 100 places, 120 transitions, 893 flow. Second operand 8 states and 224 transitions. [2024-06-04 14:35:33,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 166 transitions, 1395 flow [2024-06-04 14:35:33,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 166 transitions, 1313 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 14:35:33,452 INFO L231 Difference]: Finished difference. Result has 101 places, 122 transitions, 979 flow [2024-06-04 14:35:33,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=979, PETRI_PLACES=101, PETRI_TRANSITIONS=122} [2024-06-04 14:35:33,452 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 44 predicate places. [2024-06-04 14:35:33,452 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 122 transitions, 979 flow [2024-06-04 14:35:33,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:33,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:33,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:33,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:35:33,453 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:33,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:33,453 INFO L85 PathProgramCache]: Analyzing trace with hash 923172223, now seen corresponding path program 1 times [2024-06-04 14:35:33,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:33,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385490161] [2024-06-04 14:35:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:33,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:34,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:34,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385490161] [2024-06-04 14:35:34,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385490161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:34,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:34,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:35:34,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424023561] [2024-06-04 14:35:34,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:34,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:35:34,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:34,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:35:34,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:35:34,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:35:34,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 122 transitions, 979 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 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) [2024-06-04 14:35:34,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:34,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:35:34,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:36,736 INFO L124 PetriNetUnfolderBase]: 10984/15453 cut-off events. [2024-06-04 14:35:36,736 INFO L125 PetriNetUnfolderBase]: For 216650/216661 co-relation queries the response was YES. [2024-06-04 14:35:36,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77920 conditions, 15453 events. 10984/15453 cut-off events. For 216650/216661 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 88177 event pairs, 4697 based on Foata normal form. 14/15398 useless extension candidates. Maximal degree in co-relation 77882. Up to 14680 conditions per place. [2024-06-04 14:35:36,853 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 130 selfloop transitions, 35 changer transitions 0/174 dead transitions. [2024-06-04 14:35:36,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 174 transitions, 1540 flow [2024-06-04 14:35:36,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:35:36,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:35:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-04 14:35:36,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-06-04 14:35:36,855 INFO L175 Difference]: Start difference. First operand has 101 places, 122 transitions, 979 flow. Second operand 8 states and 215 transitions. [2024-06-04 14:35:36,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 174 transitions, 1540 flow [2024-06-04 14:35:36,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 174 transitions, 1408 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-04 14:35:36,973 INFO L231 Difference]: Finished difference. Result has 104 places, 129 transitions, 1022 flow [2024-06-04 14:35:36,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1022, PETRI_PLACES=104, PETRI_TRANSITIONS=129} [2024-06-04 14:35:36,974 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 47 predicate places. [2024-06-04 14:35:36,974 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 129 transitions, 1022 flow [2024-06-04 14:35:36,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 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) [2024-06-04 14:35:36,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:36,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:36,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:35:36,974 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:36,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:36,975 INFO L85 PathProgramCache]: Analyzing trace with hash 551987941, now seen corresponding path program 1 times [2024-06-04 14:35:36,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:36,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929080029] [2024-06-04 14:35:36,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:36,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:37,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:37,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:37,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929080029] [2024-06-04 14:35:37,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929080029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:37,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:37,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:35:37,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294023957] [2024-06-04 14:35:37,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:37,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:35:37,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:37,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:35:37,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:35:37,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:35:37,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 129 transitions, 1022 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:37,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:37,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:35:37,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:39,844 INFO L124 PetriNetUnfolderBase]: 10937/15402 cut-off events. [2024-06-04 14:35:39,844 INFO L125 PetriNetUnfolderBase]: For 233779/233802 co-relation queries the response was YES. [2024-06-04 14:35:39,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79848 conditions, 15402 events. 10937/15402 cut-off events. For 233779/233802 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 87991 event pairs, 5139 based on Foata normal form. 23/15385 useless extension candidates. Maximal degree in co-relation 79808. Up to 14751 conditions per place. [2024-06-04 14:35:39,973 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 113 selfloop transitions, 35 changer transitions 0/162 dead transitions. [2024-06-04 14:35:39,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 162 transitions, 1562 flow [2024-06-04 14:35:39,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:35:39,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:35:39,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-04 14:35:39,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49691358024691357 [2024-06-04 14:35:39,974 INFO L175 Difference]: Start difference. First operand has 104 places, 129 transitions, 1022 flow. Second operand 6 states and 161 transitions. [2024-06-04 14:35:39,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 162 transitions, 1562 flow [2024-06-04 14:35:40,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 162 transitions, 1450 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-04 14:35:40,090 INFO L231 Difference]: Finished difference. Result has 105 places, 137 transitions, 1105 flow [2024-06-04 14:35:40,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1105, PETRI_PLACES=105, PETRI_TRANSITIONS=137} [2024-06-04 14:35:40,091 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 48 predicate places. [2024-06-04 14:35:40,091 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 137 transitions, 1105 flow [2024-06-04 14:35:40,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:40,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:40,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:40,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:35:40,092 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:40,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:40,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1298910243, now seen corresponding path program 4 times [2024-06-04 14:35:40,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:40,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162472998] [2024-06-04 14:35:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:40,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:41,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:41,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162472998] [2024-06-04 14:35:41,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162472998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:41,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:41,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:35:41,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472562589] [2024-06-04 14:35:41,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:41,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:35:41,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:41,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:35:41,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:35:41,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:35:41,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 137 transitions, 1105 flow. Second operand has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:41,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:41,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:35:41,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:43,305 INFO L124 PetriNetUnfolderBase]: 10655/15108 cut-off events. [2024-06-04 14:35:43,305 INFO L125 PetriNetUnfolderBase]: For 279279/279456 co-relation queries the response was YES. [2024-06-04 14:35:43,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83736 conditions, 15108 events. 10655/15108 cut-off events. For 279279/279456 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 88861 event pairs, 4706 based on Foata normal form. 62/15000 useless extension candidates. Maximal degree in co-relation 83695. Up to 14032 conditions per place. [2024-06-04 14:35:43,451 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 110 selfloop transitions, 57 changer transitions 0/181 dead transitions. [2024-06-04 14:35:43,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 181 transitions, 1637 flow [2024-06-04 14:35:43,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:35:43,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:35:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-04 14:35:43,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115740740740741 [2024-06-04 14:35:43,453 INFO L175 Difference]: Start difference. First operand has 105 places, 137 transitions, 1105 flow. Second operand 8 states and 221 transitions. [2024-06-04 14:35:43,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 181 transitions, 1637 flow [2024-06-04 14:35:43,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 181 transitions, 1587 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-04 14:35:43,636 INFO L231 Difference]: Finished difference. Result has 111 places, 139 transitions, 1237 flow [2024-06-04 14:35:43,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1237, PETRI_PLACES=111, PETRI_TRANSITIONS=139} [2024-06-04 14:35:43,637 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 54 predicate places. [2024-06-04 14:35:43,637 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 139 transitions, 1237 flow [2024-06-04 14:35:43,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:43,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:43,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:43,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:35:43,638 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:43,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:43,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1648532053, now seen corresponding path program 2 times [2024-06-04 14:35:43,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:43,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997808687] [2024-06-04 14:35:43,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:43,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:44,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:44,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997808687] [2024-06-04 14:35:44,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997808687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:44,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:44,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:35:44,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910152725] [2024-06-04 14:35:44,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:44,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:35:44,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:44,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:35:44,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:35:44,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:35:44,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 139 transitions, 1237 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 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) [2024-06-04 14:35:44,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:44,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:35:44,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:47,098 INFO L124 PetriNetUnfolderBase]: 11171/15730 cut-off events. [2024-06-04 14:35:47,098 INFO L125 PetriNetUnfolderBase]: For 304600/304621 co-relation queries the response was YES. [2024-06-04 14:35:47,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88116 conditions, 15730 events. 11171/15730 cut-off events. For 304600/304621 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 89720 event pairs, 4713 based on Foata normal form. 20/15677 useless extension candidates. Maximal degree in co-relation 88073. Up to 14918 conditions per place. [2024-06-04 14:35:47,216 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 138 selfloop transitions, 43 changer transitions 0/192 dead transitions. [2024-06-04 14:35:47,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 192 transitions, 1867 flow [2024-06-04 14:35:47,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:35:47,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:35:47,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-04 14:35:47,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48842592592592593 [2024-06-04 14:35:47,218 INFO L175 Difference]: Start difference. First operand has 111 places, 139 transitions, 1237 flow. Second operand 8 states and 211 transitions. [2024-06-04 14:35:47,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 192 transitions, 1867 flow [2024-06-04 14:35:47,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 192 transitions, 1715 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-04 14:35:47,376 INFO L231 Difference]: Finished difference. Result has 114 places, 150 transitions, 1331 flow [2024-06-04 14:35:47,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1331, PETRI_PLACES=114, PETRI_TRANSITIONS=150} [2024-06-04 14:35:47,377 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 57 predicate places. [2024-06-04 14:35:47,377 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 150 transitions, 1331 flow [2024-06-04 14:35:47,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 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) [2024-06-04 14:35:47,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:47,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:47,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:35:47,378 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:47,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:47,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1535566971, now seen corresponding path program 3 times [2024-06-04 14:35:47,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:47,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237310211] [2024-06-04 14:35:47,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:47,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:48,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:48,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237310211] [2024-06-04 14:35:48,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237310211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:48,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:48,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:35:48,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081312447] [2024-06-04 14:35:48,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:48,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:35:48,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:48,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:35:48,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:35:48,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:35:48,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 150 transitions, 1331 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 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) [2024-06-04 14:35:48,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:48,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:35:48,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:50,643 INFO L124 PetriNetUnfolderBase]: 11207/15782 cut-off events. [2024-06-04 14:35:50,644 INFO L125 PetriNetUnfolderBase]: For 336246/336267 co-relation queries the response was YES. [2024-06-04 14:35:50,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91510 conditions, 15782 events. 11207/15782 cut-off events. For 336246/336267 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 90118 event pairs, 4392 based on Foata normal form. 20/15729 useless extension candidates. Maximal degree in co-relation 91465. Up to 14833 conditions per place. [2024-06-04 14:35:50,762 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 137 selfloop transitions, 54 changer transitions 0/202 dead transitions. [2024-06-04 14:35:50,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 202 transitions, 2109 flow [2024-06-04 14:35:50,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:35:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:35:50,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-04 14:35:50,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-06-04 14:35:50,764 INFO L175 Difference]: Start difference. First operand has 114 places, 150 transitions, 1331 flow. Second operand 8 states and 215 transitions. [2024-06-04 14:35:50,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 202 transitions, 2109 flow [2024-06-04 14:35:50,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 202 transitions, 1999 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-04 14:35:50,960 INFO L231 Difference]: Finished difference. Result has 119 places, 156 transitions, 1485 flow [2024-06-04 14:35:50,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1485, PETRI_PLACES=119, PETRI_TRANSITIONS=156} [2024-06-04 14:35:50,960 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 62 predicate places. [2024-06-04 14:35:50,960 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 156 transitions, 1485 flow [2024-06-04 14:35:50,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 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) [2024-06-04 14:35:50,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:50,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:50,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:35:50,961 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:50,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:50,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1420630903, now seen corresponding path program 4 times [2024-06-04 14:35:50,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:50,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301171976] [2024-06-04 14:35:50,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:50,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:52,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:52,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301171976] [2024-06-04 14:35:52,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301171976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:52,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:52,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:35:52,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141648427] [2024-06-04 14:35:52,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:52,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:35:52,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:52,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:35:52,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:35:52,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:35:52,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 156 transitions, 1485 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 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) [2024-06-04 14:35:52,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:52,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:35:52,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:54,323 INFO L124 PetriNetUnfolderBase]: 11192/15761 cut-off events. [2024-06-04 14:35:54,323 INFO L125 PetriNetUnfolderBase]: For 366430/366451 co-relation queries the response was YES. [2024-06-04 14:35:54,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92464 conditions, 15761 events. 11192/15761 cut-off events. For 366430/366451 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 89973 event pairs, 4694 based on Foata normal form. 20/15708 useless extension candidates. Maximal degree in co-relation 92418. Up to 14949 conditions per place. [2024-06-04 14:35:54,467 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 145 selfloop transitions, 42 changer transitions 0/198 dead transitions. [2024-06-04 14:35:54,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 198 transitions, 1999 flow [2024-06-04 14:35:54,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:35:54,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:35:54,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-04 14:35:54,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2024-06-04 14:35:54,468 INFO L175 Difference]: Start difference. First operand has 119 places, 156 transitions, 1485 flow. Second operand 8 states and 212 transitions. [2024-06-04 14:35:54,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 198 transitions, 1999 flow [2024-06-04 14:35:54,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 198 transitions, 1841 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-04 14:35:54,773 INFO L231 Difference]: Finished difference. Result has 123 places, 156 transitions, 1421 flow [2024-06-04 14:35:54,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1421, PETRI_PLACES=123, PETRI_TRANSITIONS=156} [2024-06-04 14:35:54,773 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 66 predicate places. [2024-06-04 14:35:54,773 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 156 transitions, 1421 flow [2024-06-04 14:35:54,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 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) [2024-06-04 14:35:54,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:54,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:54,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:35:54,774 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:54,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:54,774 INFO L85 PathProgramCache]: Analyzing trace with hash 563415781, now seen corresponding path program 2 times [2024-06-04 14:35:54,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:54,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278086708] [2024-06-04 14:35:54,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:54,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:55,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:55,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278086708] [2024-06-04 14:35:55,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278086708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:55,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:55,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:35:55,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869234932] [2024-06-04 14:35:55,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:55,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:35:55,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:55,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:35:55,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:35:55,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:35:55,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 156 transitions, 1421 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:55,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:55,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:35:55,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:57,646 INFO L124 PetriNetUnfolderBase]: 11074/15625 cut-off events. [2024-06-04 14:35:57,646 INFO L125 PetriNetUnfolderBase]: For 373025/373040 co-relation queries the response was YES. [2024-06-04 14:35:57,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90812 conditions, 15625 events. 11074/15625 cut-off events. For 373025/373040 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 89545 event pairs, 5133 based on Foata normal form. 15/15594 useless extension candidates. Maximal degree in co-relation 90764. Up to 14942 conditions per place. [2024-06-04 14:35:57,799 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 120 selfloop transitions, 35 changer transitions 0/174 dead transitions. [2024-06-04 14:35:57,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 174 transitions, 1787 flow [2024-06-04 14:35:57,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:35:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:35:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-04 14:35:57,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-04 14:35:57,800 INFO L175 Difference]: Start difference. First operand has 123 places, 156 transitions, 1421 flow. Second operand 6 states and 153 transitions. [2024-06-04 14:35:57,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 174 transitions, 1787 flow [2024-06-04 14:35:58,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 174 transitions, 1619 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-04 14:35:58,063 INFO L231 Difference]: Finished difference. Result has 120 places, 156 transitions, 1332 flow [2024-06-04 14:35:58,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1332, PETRI_PLACES=120, PETRI_TRANSITIONS=156} [2024-06-04 14:35:58,064 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2024-06-04 14:35:58,064 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 156 transitions, 1332 flow [2024-06-04 14:35:58,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:58,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:58,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:58,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:35:58,064 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:58,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:58,064 INFO L85 PathProgramCache]: Analyzing trace with hash 557707813, now seen corresponding path program 1 times [2024-06-04 14:35:58,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:58,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708646050] [2024-06-04 14:35:58,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:58,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:58,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:58,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708646050] [2024-06-04 14:35:58,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708646050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:58,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:58,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:35:58,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393255095] [2024-06-04 14:35:58,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:58,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:35:58,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:58,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:35:58,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:35:58,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:35:58,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 156 transitions, 1332 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:58,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:58,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:35:58,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:00,842 INFO L124 PetriNetUnfolderBase]: 10333/14723 cut-off events. [2024-06-04 14:36:00,842 INFO L125 PetriNetUnfolderBase]: For 341412/341420 co-relation queries the response was YES. [2024-06-04 14:36:00,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85469 conditions, 14723 events. 10333/14723 cut-off events. For 341412/341420 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 84390 event pairs, 4392 based on Foata normal form. 6/14694 useless extension candidates. Maximal degree in co-relation 85422. Up to 14061 conditions per place. [2024-06-04 14:36:00,984 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 158 selfloop transitions, 21 changer transitions 0/187 dead transitions. [2024-06-04 14:36:00,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 187 transitions, 1964 flow [2024-06-04 14:36:00,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:36:00,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:36:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-04 14:36:00,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4876543209876543 [2024-06-04 14:36:00,986 INFO L175 Difference]: Start difference. First operand has 120 places, 156 transitions, 1332 flow. Second operand 6 states and 158 transitions. [2024-06-04 14:36:00,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 187 transitions, 1964 flow [2024-06-04 14:36:01,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 187 transitions, 1863 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 14:36:01,339 INFO L231 Difference]: Finished difference. Result has 121 places, 164 transitions, 1406 flow [2024-06-04 14:36:01,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1231, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1406, PETRI_PLACES=121, PETRI_TRANSITIONS=164} [2024-06-04 14:36:01,340 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 64 predicate places. [2024-06-04 14:36:01,340 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 164 transitions, 1406 flow [2024-06-04 14:36:01,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:01,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:01,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:01,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:36:01,340 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:01,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:01,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1450895623, now seen corresponding path program 2 times [2024-06-04 14:36:01,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:01,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148312168] [2024-06-04 14:36:01,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:01,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:02,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:02,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148312168] [2024-06-04 14:36:02,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148312168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:02,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:02,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:36:02,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148521688] [2024-06-04 14:36:02,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:02,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:36:02,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:02,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:36:02,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:36:02,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:36:02,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 164 transitions, 1406 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:02,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:02,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:36:02,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:04,101 INFO L124 PetriNetUnfolderBase]: 10326/14731 cut-off events. [2024-06-04 14:36:04,102 INFO L125 PetriNetUnfolderBase]: For 371316/371324 co-relation queries the response was YES. [2024-06-04 14:36:04,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88475 conditions, 14731 events. 10326/14731 cut-off events. For 371316/371324 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 84704 event pairs, 4411 based on Foata normal form. 6/14701 useless extension candidates. Maximal degree in co-relation 88427. Up to 14054 conditions per place. [2024-06-04 14:36:04,243 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 153 selfloop transitions, 21 changer transitions 0/182 dead transitions. [2024-06-04 14:36:04,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 182 transitions, 1810 flow [2024-06-04 14:36:04,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:36:04,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:36:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-04 14:36:04,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-04 14:36:04,244 INFO L175 Difference]: Start difference. First operand has 121 places, 164 transitions, 1406 flow. Second operand 6 states and 153 transitions. [2024-06-04 14:36:04,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 182 transitions, 1810 flow [2024-06-04 14:36:04,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 182 transitions, 1712 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-04 14:36:04,597 INFO L231 Difference]: Finished difference. Result has 125 places, 164 transitions, 1359 flow [2024-06-04 14:36:04,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1308, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1359, PETRI_PLACES=125, PETRI_TRANSITIONS=164} [2024-06-04 14:36:04,597 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 68 predicate places. [2024-06-04 14:36:04,597 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 164 transitions, 1359 flow [2024-06-04 14:36:04,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:04,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:04,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:04,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:36:04,598 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:04,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:04,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1088033837, now seen corresponding path program 1 times [2024-06-04 14:36:04,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:04,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325678391] [2024-06-04 14:36:04,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:04,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:05,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:05,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325678391] [2024-06-04 14:36:05,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325678391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:05,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:05,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:36:05,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31244633] [2024-06-04 14:36:05,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:05,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:36:05,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:05,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:36:05,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:36:05,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:36:05,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 164 transitions, 1359 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:05,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:05,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:36:05,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:08,381 INFO L124 PetriNetUnfolderBase]: 11550/16292 cut-off events. [2024-06-04 14:36:08,381 INFO L125 PetriNetUnfolderBase]: For 484091/484096 co-relation queries the response was YES. [2024-06-04 14:36:08,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101513 conditions, 16292 events. 11550/16292 cut-off events. For 484091/484096 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 93422 event pairs, 4679 based on Foata normal form. 18/16178 useless extension candidates. Maximal degree in co-relation 101463. Up to 14825 conditions per place. [2024-06-04 14:36:08,517 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 143 selfloop transitions, 79 changer transitions 0/235 dead transitions. [2024-06-04 14:36:08,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 235 transitions, 2194 flow [2024-06-04 14:36:08,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:36:08,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:36:08,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-06-04 14:36:08,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082304526748971 [2024-06-04 14:36:08,519 INFO L175 Difference]: Start difference. First operand has 125 places, 164 transitions, 1359 flow. Second operand 9 states and 247 transitions. [2024-06-04 14:36:08,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 235 transitions, 2194 flow [2024-06-04 14:36:08,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 235 transitions, 2135 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 14:36:08,849 INFO L231 Difference]: Finished difference. Result has 131 places, 180 transitions, 1712 flow [2024-06-04 14:36:08,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1712, PETRI_PLACES=131, PETRI_TRANSITIONS=180} [2024-06-04 14:36:08,849 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 74 predicate places. [2024-06-04 14:36:08,849 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 180 transitions, 1712 flow [2024-06-04 14:36:08,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:08,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:08,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:08,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:36:08,850 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:08,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:08,850 INFO L85 PathProgramCache]: Analyzing trace with hash 910156773, now seen corresponding path program 1 times [2024-06-04 14:36:08,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:08,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70010174] [2024-06-04 14:36:08,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:08,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:09,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:09,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70010174] [2024-06-04 14:36:09,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70010174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:09,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:09,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:36:09,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795558139] [2024-06-04 14:36:09,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:09,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:36:09,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:09,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:36:09,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:36:09,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:36:09,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 180 transitions, 1712 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-04 14:36:09,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:09,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:36:09,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:12,249 INFO L124 PetriNetUnfolderBase]: 11357/16074 cut-off events. [2024-06-04 14:36:12,249 INFO L125 PetriNetUnfolderBase]: For 509034/509099 co-relation queries the response was YES. [2024-06-04 14:36:12,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102409 conditions, 16074 events. 11357/16074 cut-off events. For 509034/509099 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 92608 event pairs, 4913 based on Foata normal form. 24/16050 useless extension candidates. Maximal degree in co-relation 102356. Up to 15280 conditions per place. [2024-06-04 14:36:12,399 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 156 selfloop transitions, 45 changer transitions 0/220 dead transitions. [2024-06-04 14:36:12,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 220 transitions, 2444 flow [2024-06-04 14:36:12,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:36:12,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:36:12,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-04 14:36:12,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-06-04 14:36:12,400 INFO L175 Difference]: Start difference. First operand has 131 places, 180 transitions, 1712 flow. Second operand 7 states and 188 transitions. [2024-06-04 14:36:12,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 220 transitions, 2444 flow [2024-06-04 14:36:12,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 220 transitions, 2286 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-04 14:36:12,823 INFO L231 Difference]: Finished difference. Result has 134 places, 188 transitions, 1797 flow [2024-06-04 14:36:12,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1797, PETRI_PLACES=134, PETRI_TRANSITIONS=188} [2024-06-04 14:36:12,823 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 77 predicate places. [2024-06-04 14:36:12,823 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 188 transitions, 1797 flow [2024-06-04 14:36:12,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-04 14:36:12,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:12,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:12,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:36:12,824 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:12,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:12,824 INFO L85 PathProgramCache]: Analyzing trace with hash 92240053, now seen corresponding path program 2 times [2024-06-04 14:36:12,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:12,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895932230] [2024-06-04 14:36:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:12,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:13,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:13,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895932230] [2024-06-04 14:36:13,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895932230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:13,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:13,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:36:13,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725214114] [2024-06-04 14:36:13,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:13,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:36:13,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:13,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:36:13,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:36:14,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:36:14,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 188 transitions, 1797 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:14,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:14,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:36:14,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:16,906 INFO L124 PetriNetUnfolderBase]: 11824/16740 cut-off events. [2024-06-04 14:36:16,906 INFO L125 PetriNetUnfolderBase]: For 571582/571608 co-relation queries the response was YES. [2024-06-04 14:36:16,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110712 conditions, 16740 events. 11824/16740 cut-off events. For 571582/571608 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 96705 event pairs, 4698 based on Foata normal form. 18/16629 useless extension candidates. Maximal degree in co-relation 110658. Up to 15385 conditions per place. [2024-06-04 14:36:17,065 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 153 selfloop transitions, 86 changer transitions 0/252 dead transitions. [2024-06-04 14:36:17,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 252 transitions, 2612 flow [2024-06-04 14:36:17,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:36:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:36:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-04 14:36:17,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020576131687243 [2024-06-04 14:36:17,067 INFO L175 Difference]: Start difference. First operand has 134 places, 188 transitions, 1797 flow. Second operand 9 states and 244 transitions. [2024-06-04 14:36:17,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 252 transitions, 2612 flow [2024-06-04 14:36:17,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 252 transitions, 2536 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-04 14:36:17,603 INFO L231 Difference]: Finished difference. Result has 142 places, 200 transitions, 2102 flow [2024-06-04 14:36:17,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2102, PETRI_PLACES=142, PETRI_TRANSITIONS=200} [2024-06-04 14:36:17,604 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 85 predicate places. [2024-06-04 14:36:17,604 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 200 transitions, 2102 flow [2024-06-04 14:36:17,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:17,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:17,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:17,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:36:17,604 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:17,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:17,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1818587715, now seen corresponding path program 3 times [2024-06-04 14:36:17,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:17,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937003616] [2024-06-04 14:36:17,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:17,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:18,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:18,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937003616] [2024-06-04 14:36:18,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937003616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:18,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:18,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:36:18,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138938420] [2024-06-04 14:36:18,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:18,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:36:18,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:18,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:36:18,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:36:19,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:36:19,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 200 transitions, 2102 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:19,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:19,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:36:19,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:21,721 INFO L124 PetriNetUnfolderBase]: 12025/17059 cut-off events. [2024-06-04 14:36:21,722 INFO L125 PetriNetUnfolderBase]: For 629616/629658 co-relation queries the response was YES. [2024-06-04 14:36:21,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116182 conditions, 17059 events. 12025/17059 cut-off events. For 629616/629658 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 99186 event pairs, 4344 based on Foata normal form. 18/16940 useless extension candidates. Maximal degree in co-relation 116124. Up to 14715 conditions per place. [2024-06-04 14:36:21,890 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 142 selfloop transitions, 106 changer transitions 0/261 dead transitions. [2024-06-04 14:36:21,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 261 transitions, 3086 flow [2024-06-04 14:36:21,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:36:21,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:36:21,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-04 14:36:21,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5061728395061729 [2024-06-04 14:36:21,892 INFO L175 Difference]: Start difference. First operand has 142 places, 200 transitions, 2102 flow. Second operand 9 states and 246 transitions. [2024-06-04 14:36:21,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 261 transitions, 3086 flow [2024-06-04 14:36:22,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 261 transitions, 2935 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-04 14:36:22,506 INFO L231 Difference]: Finished difference. Result has 149 places, 206 transitions, 2407 flow [2024-06-04 14:36:22,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2407, PETRI_PLACES=149, PETRI_TRANSITIONS=206} [2024-06-04 14:36:22,507 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 92 predicate places. [2024-06-04 14:36:22,507 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 206 transitions, 2407 flow [2024-06-04 14:36:22,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:22,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:22,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:22,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 14:36:22,508 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:22,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:22,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1089886521, now seen corresponding path program 4 times [2024-06-04 14:36:22,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:22,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074314509] [2024-06-04 14:36:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:22,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:23,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:23,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:23,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074314509] [2024-06-04 14:36:23,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074314509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:23,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:23,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:36:23,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550332589] [2024-06-04 14:36:23,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:23,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:36:23,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:23,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:36:23,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:36:23,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:36:23,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 206 transitions, 2407 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:23,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:23,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:36:23,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:27,076 INFO L124 PetriNetUnfolderBase]: 11969/16995 cut-off events. [2024-06-04 14:36:27,076 INFO L125 PetriNetUnfolderBase]: For 657183/657209 co-relation queries the response was YES. [2024-06-04 14:36:27,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115983 conditions, 16995 events. 11969/16995 cut-off events. For 657183/657209 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 98773 event pairs, 4725 based on Foata normal form. 18/16884 useless extension candidates. Maximal degree in co-relation 115923. Up to 15608 conditions per place. [2024-06-04 14:36:27,261 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 160 selfloop transitions, 84 changer transitions 0/257 dead transitions. [2024-06-04 14:36:27,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 257 transitions, 3035 flow [2024-06-04 14:36:27,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:36:27,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:36:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-04 14:36:27,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020576131687243 [2024-06-04 14:36:27,264 INFO L175 Difference]: Start difference. First operand has 149 places, 206 transitions, 2407 flow. Second operand 9 states and 244 transitions. [2024-06-04 14:36:27,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 257 transitions, 3035 flow [2024-06-04 14:36:27,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 257 transitions, 2865 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-04 14:36:27,978 INFO L231 Difference]: Finished difference. Result has 152 places, 205 transitions, 2368 flow [2024-06-04 14:36:27,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2193, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2368, PETRI_PLACES=152, PETRI_TRANSITIONS=205} [2024-06-04 14:36:27,979 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 95 predicate places. [2024-06-04 14:36:27,979 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 205 transitions, 2368 flow [2024-06-04 14:36:27,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:27,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:27,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:27,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 14:36:27,980 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:27,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:27,980 INFO L85 PathProgramCache]: Analyzing trace with hash 286021437, now seen corresponding path program 2 times [2024-06-04 14:36:27,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:27,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083291878] [2024-06-04 14:36:27,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:27,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:28,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:28,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083291878] [2024-06-04 14:36:28,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083291878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:28,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:28,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:36:28,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211891764] [2024-06-04 14:36:28,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:28,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:36:28,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:28,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:36:28,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:36:29,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:36:29,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 205 transitions, 2368 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-04 14:36:29,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:29,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:36:29,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:31,944 INFO L124 PetriNetUnfolderBase]: 11760/16729 cut-off events. [2024-06-04 14:36:31,944 INFO L125 PetriNetUnfolderBase]: For 661696/661753 co-relation queries the response was YES. [2024-06-04 14:36:32,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113858 conditions, 16729 events. 11760/16729 cut-off events. For 661696/661753 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 97609 event pairs, 4957 based on Foata normal form. 25/16677 useless extension candidates. Maximal degree in co-relation 113796. Up to 15860 conditions per place. [2024-06-04 14:36:32,093 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 168 selfloop transitions, 49 changer transitions 0/236 dead transitions. [2024-06-04 14:36:32,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 236 transitions, 3070 flow [2024-06-04 14:36:32,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:36:32,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:36:32,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 14:36:32,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-04 14:36:32,094 INFO L175 Difference]: Start difference. First operand has 152 places, 205 transitions, 2368 flow. Second operand 7 states and 181 transitions. [2024-06-04 14:36:32,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 236 transitions, 3070 flow [2024-06-04 14:36:32,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 236 transitions, 2792 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-04 14:36:32,594 INFO L231 Difference]: Finished difference. Result has 151 places, 209 transitions, 2271 flow [2024-06-04 14:36:32,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2090, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2271, PETRI_PLACES=151, PETRI_TRANSITIONS=209} [2024-06-04 14:36:32,595 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 94 predicate places. [2024-06-04 14:36:32,595 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 209 transitions, 2271 flow [2024-06-04 14:36:32,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-04 14:36:32,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:32,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:32,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 14:36:32,595 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:32,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:32,596 INFO L85 PathProgramCache]: Analyzing trace with hash 286437147, now seen corresponding path program 3 times [2024-06-04 14:36:32,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:32,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909302535] [2024-06-04 14:36:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:32,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:33,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:33,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909302535] [2024-06-04 14:36:33,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909302535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:33,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:33,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:36:33,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972814784] [2024-06-04 14:36:33,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:33,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:36:33,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:33,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:36:33,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:36:33,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:36:33,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 209 transitions, 2271 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-04 14:36:33,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:33,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:36:33,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:36,590 INFO L124 PetriNetUnfolderBase]: 11732/16677 cut-off events. [2024-06-04 14:36:36,590 INFO L125 PetriNetUnfolderBase]: For 683335/683394 co-relation queries the response was YES. [2024-06-04 14:36:36,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113489 conditions, 16677 events. 11732/16677 cut-off events. For 683335/683394 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 97016 event pairs, 4953 based on Foata normal form. 39/16624 useless extension candidates. Maximal degree in co-relation 113428. Up to 15840 conditions per place. [2024-06-04 14:36:36,764 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 164 selfloop transitions, 50 changer transitions 0/233 dead transitions. [2024-06-04 14:36:36,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 233 transitions, 2771 flow [2024-06-04 14:36:36,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:36:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:36:36,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-04 14:36:36,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-04 14:36:36,765 INFO L175 Difference]: Start difference. First operand has 151 places, 209 transitions, 2271 flow. Second operand 7 states and 177 transitions. [2024-06-04 14:36:36,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 233 transitions, 2771 flow [2024-06-04 14:36:37,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 233 transitions, 2562 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-04 14:36:37,462 INFO L231 Difference]: Finished difference. Result has 153 places, 209 transitions, 2171 flow [2024-06-04 14:36:37,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2171, PETRI_PLACES=153, PETRI_TRANSITIONS=209} [2024-06-04 14:36:37,463 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 96 predicate places. [2024-06-04 14:36:37,463 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 209 transitions, 2171 flow [2024-06-04 14:36:37,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-04 14:36:37,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:37,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:37,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 14:36:37,464 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:37,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:37,464 INFO L85 PathProgramCache]: Analyzing trace with hash 109069593, now seen corresponding path program 1 times [2024-06-04 14:36:37,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:37,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026579665] [2024-06-04 14:36:37,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:37,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:38,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:38,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026579665] [2024-06-04 14:36:38,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026579665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:38,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:38,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:36:38,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537938074] [2024-06-04 14:36:38,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:38,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:36:38,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:38,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:36:38,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:36:38,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:36:38,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 209 transitions, 2171 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-04 14:36:38,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:38,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:36:38,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:41,082 INFO L124 PetriNetUnfolderBase]: 11105/15959 cut-off events. [2024-06-04 14:36:41,082 INFO L125 PetriNetUnfolderBase]: For 612386/612388 co-relation queries the response was YES. [2024-06-04 14:36:41,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106722 conditions, 15959 events. 11105/15959 cut-off events. For 612386/612388 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 93436 event pairs, 4330 based on Foata normal form. 2/15917 useless extension candidates. Maximal degree in co-relation 106660. Up to 15215 conditions per place. [2024-06-04 14:36:41,216 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 215 selfloop transitions, 18 changer transitions 0/241 dead transitions. [2024-06-04 14:36:41,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 241 transitions, 2803 flow [2024-06-04 14:36:41,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:36:41,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:36:41,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-04 14:36:41,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-04 14:36:41,217 INFO L175 Difference]: Start difference. First operand has 153 places, 209 transitions, 2171 flow. Second operand 7 states and 178 transitions. [2024-06-04 14:36:41,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 241 transitions, 2803 flow [2024-06-04 14:36:41,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 241 transitions, 2692 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 14:36:41,934 INFO L231 Difference]: Finished difference. Result has 154 places, 213 transitions, 2191 flow [2024-06-04 14:36:41,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2060, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2191, PETRI_PLACES=154, PETRI_TRANSITIONS=213} [2024-06-04 14:36:41,935 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 97 predicate places. [2024-06-04 14:36:41,935 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 213 transitions, 2191 flow [2024-06-04 14:36:41,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-04 14:36:41,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:41,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:41,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 14:36:41,935 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:41,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:41,935 INFO L85 PathProgramCache]: Analyzing trace with hash 489196509, now seen corresponding path program 2 times [2024-06-04 14:36:41,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:41,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394547767] [2024-06-04 14:36:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:41,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:43,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:43,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394547767] [2024-06-04 14:36:43,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394547767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:43,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:43,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:36:43,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230885408] [2024-06-04 14:36:43,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:43,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:36:43,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:43,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:36:43,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:36:43,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:36:43,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 213 transitions, 2191 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-04 14:36:43,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:43,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:36:43,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:46,079 INFO L124 PetriNetUnfolderBase]: 11121/15981 cut-off events. [2024-06-04 14:36:46,079 INFO L125 PetriNetUnfolderBase]: For 650680/650685 co-relation queries the response was YES. [2024-06-04 14:36:46,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109793 conditions, 15981 events. 11121/15981 cut-off events. For 650680/650685 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 93594 event pairs, 4334 based on Foata normal form. 4/15945 useless extension candidates. Maximal degree in co-relation 109730. Up to 15189 conditions per place. [2024-06-04 14:36:46,233 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 205 selfloop transitions, 35 changer transitions 0/248 dead transitions. [2024-06-04 14:36:46,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 248 transitions, 3053 flow [2024-06-04 14:36:46,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:36:46,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:36:46,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 14:36:46,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-04 14:36:46,234 INFO L175 Difference]: Start difference. First operand has 154 places, 213 transitions, 2191 flow. Second operand 7 states and 181 transitions. [2024-06-04 14:36:46,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 248 transitions, 3053 flow [2024-06-04 14:36:47,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 248 transitions, 2952 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-04 14:36:47,004 INFO L231 Difference]: Finished difference. Result has 156 places, 221 transitions, 2349 flow [2024-06-04 14:36:47,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2090, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2349, PETRI_PLACES=156, PETRI_TRANSITIONS=221} [2024-06-04 14:36:47,005 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 99 predicate places. [2024-06-04 14:36:47,005 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 221 transitions, 2349 flow [2024-06-04 14:36:47,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-04 14:36:47,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:47,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:47,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 14:36:47,005 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:47,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:47,006 INFO L85 PathProgramCache]: Analyzing trace with hash 109074429, now seen corresponding path program 1 times [2024-06-04 14:36:47,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:47,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646224012] [2024-06-04 14:36:47,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:47,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:48,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:48,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646224012] [2024-06-04 14:36:48,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646224012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:48,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:48,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:36:48,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079806250] [2024-06-04 14:36:48,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:48,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:36:48,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:48,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:36:48,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:36:48,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:36:48,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 221 transitions, 2349 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-04 14:36:48,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:48,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:36:48,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand