./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix055_tso.oepc.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/mix055_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix055_tso.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix055_tso.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:31:39,738 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:31:39,802 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:31:39,807 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:31:39,807 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:31:39,830 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:31:39,831 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:31:39,831 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:31:39,831 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:31:39,835 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:31:39,835 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:31:39,835 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:31:39,836 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:31:39,837 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:31:39,837 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:31:39,837 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:31:39,837 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:31:39,837 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:31:39,838 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:31:39,838 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:31:39,839 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:31:39,839 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:31:39,839 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:31:39,840 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:31:39,840 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:31:39,840 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:31:39,840 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:31:39,840 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:31:39,841 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:31:39,841 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:31:39,842 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:31:39,842 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:31:39,842 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:31:39,843 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:31:39,843 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:31:39,843 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:31:39,843 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:31:39,843 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:31:39,843 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:31:39,844 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:31:39,844 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:31:39,844 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:31:39,844 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:31:39,844 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:31:40,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:31:40,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:31:40,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:31:40,092 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:31:40,092 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:31:40,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix055_tso.oepc.i [2024-06-20 16:31:41,184 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:31:41,392 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:31:41,393 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix055_tso.oepc.i [2024-06-20 16:31:41,410 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69d420eec/1815d4547f094053bba07d7a67a40275/FLAGfd393133a [2024-06-20 16:31:41,420 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69d420eec/1815d4547f094053bba07d7a67a40275 [2024-06-20 16:31:41,422 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:31:41,423 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:31:41,425 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix055_tso.oepc.yml/witness.yml [2024-06-20 16:31:41,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:31:41,596 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:31:41,597 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:31:41,597 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:31:41,601 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:31:41,601 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:31:41" (1/2) ... [2024-06-20 16:31:41,602 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d2dc09a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:31:41, skipping insertion in model container [2024-06-20 16:31:41,603 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:31:41" (1/2) ... [2024-06-20 16:31:41,604 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@51421ece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:31:41, skipping insertion in model container [2024-06-20 16:31:41,604 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:31:41" (2/2) ... [2024-06-20 16:31:41,605 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d2dc09a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:41, skipping insertion in model container [2024-06-20 16:31:41,605 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:31:41" (2/2) ... [2024-06-20 16:31:41,605 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:31:41,691 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:31:41,692 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((((((! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0) [2024-06-20 16:31:41,692 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0) [2024-06-20 16:31:41,692 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0) [2024-06-20 16:31:41,692 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ((((((((((((((((((((! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0) [2024-06-20 16:31:41,692 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:31:41,693 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-20 16:31:41,744 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:31:42,015 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:31:42,027 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:31:42,202 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:31:42,239 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:31:42,240 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:42 WrapperNode [2024-06-20 16:31:42,240 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:31:42,241 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:31:42,241 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:31:42,241 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:31:42,246 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:42" (1/1) ... [2024-06-20 16:31:42,267 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:42" (1/1) ... [2024-06-20 16:31:42,311 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 156 [2024-06-20 16:31:42,311 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:31:42,312 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:31:42,312 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:31:42,312 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:31:42,320 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:42" (1/1) ... [2024-06-20 16:31:42,320 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:42" (1/1) ... [2024-06-20 16:31:42,323 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:42" (1/1) ... [2024-06-20 16:31:42,347 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 16:31:42,347 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:42" (1/1) ... [2024-06-20 16:31:42,347 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:42" (1/1) ... [2024-06-20 16:31:42,355 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:42" (1/1) ... [2024-06-20 16:31:42,365 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:42" (1/1) ... [2024-06-20 16:31:42,367 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:42" (1/1) ... [2024-06-20 16:31:42,373 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:42" (1/1) ... [2024-06-20 16:31:42,376 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:31:42,392 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:31:42,393 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:31:42,393 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:31:42,394 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:42" (1/1) ... [2024-06-20 16:31:42,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:31:42,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:31:42,426 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 16:31:42,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 16:31:42,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:31:42,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:31:42,457 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:31:42,458 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:31:42,458 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:31:42,458 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:31:42,459 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:31:42,459 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:31:42,459 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 16:31:42,459 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 16:31:42,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:31:42,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:31:42,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:31:42,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:31:42,463 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:31:42,595 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:31:42,596 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:31:42,911 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:31:42,911 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:31:43,111 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:31:43,111 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:31:43,111 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:31:43 BoogieIcfgContainer [2024-06-20 16:31:43,111 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:31:43,113 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:31:43,113 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:31:43,116 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:31:43,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:31:41" (1/4) ... [2024-06-20 16:31:43,116 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792b2cf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:31:43, skipping insertion in model container [2024-06-20 16:31:43,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:31:41" (2/4) ... [2024-06-20 16:31:43,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792b2cf5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:31:43, skipping insertion in model container [2024-06-20 16:31:43,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:42" (3/4) ... [2024-06-20 16:31:43,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792b2cf5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:31:43, skipping insertion in model container [2024-06-20 16:31:43,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:31:43" (4/4) ... [2024-06-20 16:31:43,119 INFO L112 eAbstractionObserver]: Analyzing ICFG mix055_tso.oepc.i [2024-06-20 16:31:43,132 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:31:43,132 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 16:31:43,132 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:31:43,186 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:31:43,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-20 16:31:43,243 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-20 16:31:43,244 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:31:43,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:31:43,246 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-20 16:31:43,249 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-20 16:31:43,258 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:31:43,263 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;@3d5341c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:31:43,263 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 16:31:43,269 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:31:43,269 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-20 16:31:43,270 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:31:43,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:43,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:31:43,271 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)] === [2024-06-20 16:31:43,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:43,275 INFO L85 PathProgramCache]: Analyzing trace with hash 391382252, now seen corresponding path program 1 times [2024-06-20 16:31:43,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:43,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908460316] [2024-06-20 16:31:43,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:43,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:44,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:44,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908460316] [2024-06-20 16:31:44,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908460316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:44,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:44,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:31:44,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288213897] [2024-06-20 16:31:44,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:44,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:31:44,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:44,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:31:44,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:31:44,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:31:44,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:44,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:44,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:31:44,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:45,982 INFO L124 PetriNetUnfolderBase]: 9903/13809 cut-off events. [2024-06-20 16:31:45,982 INFO L125 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2024-06-20 16:31:45,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27713 conditions, 13809 events. 9903/13809 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 75149 event pairs, 7667 based on Foata normal form. 1/13594 useless extension candidates. Maximal degree in co-relation 27700. Up to 13453 conditions per place. [2024-06-20 16:31:46,048 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 43 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-20 16:31:46,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 227 flow [2024-06-20 16:31:46,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:31:46,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:31:46,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-06-20 16:31:46,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5947712418300654 [2024-06-20 16:31:46,058 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 91 transitions. [2024-06-20 16:31:46,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 227 flow [2024-06-20 16:31:46,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 16:31:46,063 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-20 16:31:46,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-20 16:31:46,066 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-20 16:31:46,066 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-20 16:31:46,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:46,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:46,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:46,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:31:46,067 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)] === [2024-06-20 16:31:46,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:46,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1838756085, now seen corresponding path program 1 times [2024-06-20 16:31:46,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:46,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448766697] [2024-06-20 16:31:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:46,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:46,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:46,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448766697] [2024-06-20 16:31:46,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448766697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:46,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:46,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:31:46,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123322645] [2024-06-20 16:31:46,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:46,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:31:46,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:46,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:31:46,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:31:46,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:31:46,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:46,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:46,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:31:46,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:48,297 INFO L124 PetriNetUnfolderBase]: 11585/15735 cut-off events. [2024-06-20 16:31:48,297 INFO L125 PetriNetUnfolderBase]: For 2898/2898 co-relation queries the response was YES. [2024-06-20 16:31:48,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35854 conditions, 15735 events. 11585/15735 cut-off events. For 2898/2898 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 81892 event pairs, 8249 based on Foata normal form. 4/15736 useless extension candidates. Maximal degree in co-relation 35842. Up to 15650 conditions per place. [2024-06-20 16:31:48,370 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 54 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-20 16:31:48,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 321 flow [2024-06-20 16:31:48,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:31:48,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:31:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-20 16:31:48,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637254901960784 [2024-06-20 16:31:48,372 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 115 transitions. [2024-06-20 16:31:48,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 321 flow [2024-06-20 16:31:48,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:31:48,375 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 177 flow [2024-06-20 16:31:48,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-20 16:31:48,375 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-06-20 16:31:48,376 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 177 flow [2024-06-20 16:31:48,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:48,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:48,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:48,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:31:48,376 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)] === [2024-06-20 16:31:48,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:48,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1166863045, now seen corresponding path program 1 times [2024-06-20 16:31:48,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:48,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729032542] [2024-06-20 16:31:48,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:48,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:49,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:49,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729032542] [2024-06-20 16:31:49,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729032542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:49,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:49,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:31:49,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757878853] [2024-06-20 16:31:49,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:49,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:31:49,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:49,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:31:49,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:31:49,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:31:49,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:49,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:49,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:31:49,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:50,845 INFO L124 PetriNetUnfolderBase]: 11565/15709 cut-off events. [2024-06-20 16:31:50,846 INFO L125 PetriNetUnfolderBase]: For 8281/8281 co-relation queries the response was YES. [2024-06-20 16:31:50,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39745 conditions, 15709 events. 11565/15709 cut-off events. For 8281/8281 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 81863 event pairs, 6611 based on Foata normal form. 8/15714 useless extension candidates. Maximal degree in co-relation 39731. Up to 15580 conditions per place. [2024-06-20 16:31:51,092 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 65 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2024-06-20 16:31:51,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 84 transitions, 433 flow [2024-06-20 16:31:51,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:31:51,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:31:51,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2024-06-20 16:31:51,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568627450980392 [2024-06-20 16:31:51,094 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 177 flow. Second operand 5 states and 142 transitions. [2024-06-20 16:31:51,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 84 transitions, 433 flow [2024-06-20 16:31:51,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 84 transitions, 414 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 16:31:51,098 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 225 flow [2024-06-20 16:31:51,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-06-20 16:31:51,099 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 5 predicate places. [2024-06-20 16:31:51,099 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 225 flow [2024-06-20 16:31:51,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:51,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:51,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:51,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:31:51,100 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:31:51,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:51,100 INFO L85 PathProgramCache]: Analyzing trace with hash 489977308, now seen corresponding path program 1 times [2024-06-20 16:31:51,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:51,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092975639] [2024-06-20 16:31:51,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:51,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:52,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:52,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092975639] [2024-06-20 16:31:52,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092975639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:52,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:52,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:31:52,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824681933] [2024-06-20 16:31:52,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:52,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:31:52,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:52,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:31:52,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:31:52,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:31:52,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 225 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:52,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:52,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:31:52,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:54,015 INFO L124 PetriNetUnfolderBase]: 11549/15683 cut-off events. [2024-06-20 16:31:54,016 INFO L125 PetriNetUnfolderBase]: For 16071/16071 co-relation queries the response was YES. [2024-06-20 16:31:54,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43595 conditions, 15683 events. 11549/15683 cut-off events. For 16071/16071 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 81489 event pairs, 5646 based on Foata normal form. 8/15688 useless extension candidates. Maximal degree in co-relation 43580. Up to 15514 conditions per place. [2024-06-20 16:31:54,091 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 72 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-06-20 16:31:54,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 94 transitions, 517 flow [2024-06-20 16:31:54,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:31:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:31:54,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-20 16:31:54,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5359477124183006 [2024-06-20 16:31:54,093 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 225 flow. Second operand 6 states and 164 transitions. [2024-06-20 16:31:54,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 94 transitions, 517 flow [2024-06-20 16:31:54,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 94 transitions, 484 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 16:31:54,097 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 256 flow [2024-06-20 16:31:54,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-20 16:31:54,100 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-20 16:31:54,100 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 256 flow [2024-06-20 16:31:54,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:54,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:54,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:54,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:31:54,101 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)] === [2024-06-20 16:31:54,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:54,102 INFO L85 PathProgramCache]: Analyzing trace with hash -575667842, now seen corresponding path program 1 times [2024-06-20 16:31:54,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:54,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508207763] [2024-06-20 16:31:54,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:54,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:54,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:54,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:54,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508207763] [2024-06-20 16:31:54,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508207763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:54,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:54,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:31:54,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713308098] [2024-06-20 16:31:54,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:54,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:31:54,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:54,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:31:54,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:31:55,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:55,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:55,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:55,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:55,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:56,419 INFO L124 PetriNetUnfolderBase]: 9848/13723 cut-off events. [2024-06-20 16:31:56,420 INFO L125 PetriNetUnfolderBase]: For 21341/21341 co-relation queries the response was YES. [2024-06-20 16:31:56,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40757 conditions, 13723 events. 9848/13723 cut-off events. For 21341/21341 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 74274 event pairs, 5737 based on Foata normal form. 3/13723 useless extension candidates. Maximal degree in co-relation 40740. Up to 13360 conditions per place. [2024-06-20 16:31:56,489 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 60 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2024-06-20 16:31:56,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 466 flow [2024-06-20 16:31:56,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:31:56,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:31:56,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-20 16:31:56,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2024-06-20 16:31:56,491 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 256 flow. Second operand 5 states and 117 transitions. [2024-06-20 16:31:56,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 466 flow [2024-06-20 16:31:56,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 420 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 16:31:56,496 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 275 flow [2024-06-20 16:31:56,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=275, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-06-20 16:31:56,496 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 8 predicate places. [2024-06-20 16:31:56,496 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 275 flow [2024-06-20 16:31:56,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:56,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:56,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:56,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:31:56,497 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)] === [2024-06-20 16:31:56,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:56,498 INFO L85 PathProgramCache]: Analyzing trace with hash -337716759, now seen corresponding path program 1 times [2024-06-20 16:31:56,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:56,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257867177] [2024-06-20 16:31:56,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:56,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:57,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:57,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257867177] [2024-06-20 16:31:57,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257867177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:57,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:57,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:31:57,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925636443] [2024-06-20 16:31:57,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:57,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:31:57,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:57,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:31:57,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:31:57,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:31:57,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 275 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:57,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:57,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:31:57,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:59,151 INFO L124 PetriNetUnfolderBase]: 11562/15701 cut-off events. [2024-06-20 16:31:59,151 INFO L125 PetriNetUnfolderBase]: For 36223/36223 co-relation queries the response was YES. [2024-06-20 16:31:59,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50568 conditions, 15701 events. 11562/15701 cut-off events. For 36223/36223 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 81512 event pairs, 6742 based on Foata normal form. 3/15701 useless extension candidates. Maximal degree in co-relation 50549. Up to 15601 conditions per place. [2024-06-20 16:31:59,245 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 71 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2024-06-20 16:31:59,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 90 transitions, 547 flow [2024-06-20 16:31:59,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:31:59,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:31:59,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-20 16:31:59,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4477124183006536 [2024-06-20 16:31:59,247 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 275 flow. Second operand 6 states and 137 transitions. [2024-06-20 16:31:59,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 90 transitions, 547 flow [2024-06-20 16:31:59,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 514 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 16:31:59,254 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 321 flow [2024-06-20 16:31:59,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=321, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2024-06-20 16:31:59,255 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2024-06-20 16:31:59,255 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 321 flow [2024-06-20 16:31:59,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:59,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:59,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:59,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:31:59,255 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)] === [2024-06-20 16:31:59,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:59,256 INFO L85 PathProgramCache]: Analyzing trace with hash -315223779, now seen corresponding path program 2 times [2024-06-20 16:31:59,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:59,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510522525] [2024-06-20 16:31:59,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:59,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:00,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:00,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510522525] [2024-06-20 16:32:00,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510522525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:00,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:00,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:32:00,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141400742] [2024-06-20 16:32:00,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:00,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:32:00,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:00,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:32:00,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:32:00,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:32:00,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 321 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:00,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:00,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:32:00,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:01,441 INFO L124 PetriNetUnfolderBase]: 11553/15692 cut-off events. [2024-06-20 16:32:01,442 INFO L125 PetriNetUnfolderBase]: For 48964/48980 co-relation queries the response was YES. [2024-06-20 16:32:01,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54394 conditions, 15692 events. 11553/15692 cut-off events. For 48964/48980 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 81318 event pairs, 6702 based on Foata normal form. 15/15702 useless extension candidates. Maximal degree in co-relation 54374. Up to 15559 conditions per place. [2024-06-20 16:32:01,541 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 65 selfloop transitions, 21 changer transitions 0/91 dead transitions. [2024-06-20 16:32:01,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 91 transitions, 595 flow [2024-06-20 16:32:01,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:32:01,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:32:01,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-20 16:32:01,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 16:32:01,543 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 321 flow. Second operand 6 states and 136 transitions. [2024-06-20 16:32:01,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 91 transitions, 595 flow [2024-06-20 16:32:01,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 91 transitions, 548 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 16:32:01,553 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 375 flow [2024-06-20 16:32:01,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-20 16:32:01,554 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2024-06-20 16:32:01,554 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 375 flow [2024-06-20 16:32:01,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:01,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:01,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:01,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:32:01,555 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)] === [2024-06-20 16:32:01,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:01,555 INFO L85 PathProgramCache]: Analyzing trace with hash 834044509, now seen corresponding path program 1 times [2024-06-20 16:32:01,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:01,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067909318] [2024-06-20 16:32:01,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:01,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:02,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:02,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067909318] [2024-06-20 16:32:02,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067909318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:02,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:02,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:32:02,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040971953] [2024-06-20 16:32:02,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:02,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:32:02,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:02,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:32:02,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:32:02,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:32:02,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 375 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:02,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:02,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:32:02,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:04,154 INFO L124 PetriNetUnfolderBase]: 11976/16575 cut-off events. [2024-06-20 16:32:04,154 INFO L125 PetriNetUnfolderBase]: For 63841/63841 co-relation queries the response was YES. [2024-06-20 16:32:04,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60302 conditions, 16575 events. 11976/16575 cut-off events. For 63841/63841 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 88975 event pairs, 6804 based on Foata normal form. 3/16575 useless extension candidates. Maximal degree in co-relation 60281. Up to 16170 conditions per place. [2024-06-20 16:32:04,243 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 83 selfloop transitions, 18 changer transitions 0/106 dead transitions. [2024-06-20 16:32:04,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 106 transitions, 718 flow [2024-06-20 16:32:04,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:04,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-20 16:32:04,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4341736694677871 [2024-06-20 16:32:04,245 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 375 flow. Second operand 7 states and 155 transitions. [2024-06-20 16:32:04,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 106 transitions, 718 flow [2024-06-20 16:32:04,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 106 transitions, 644 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 16:32:04,260 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 424 flow [2024-06-20 16:32:04,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=424, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2024-06-20 16:32:04,260 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2024-06-20 16:32:04,260 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 424 flow [2024-06-20 16:32:04,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:04,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:04,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:04,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:32:04,261 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)] === [2024-06-20 16:32:04,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:04,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1879403235, now seen corresponding path program 1 times [2024-06-20 16:32:04,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:04,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638149623] [2024-06-20 16:32:04,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:04,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:05,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:05,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638149623] [2024-06-20 16:32:05,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638149623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:05,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:05,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:32:05,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310912096] [2024-06-20 16:32:05,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:05,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:32:05,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:05,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:32:05,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:32:05,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:32:05,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 424 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:05,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:05,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:32:05,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:07,040 INFO L124 PetriNetUnfolderBase]: 13790/18697 cut-off events. [2024-06-20 16:32:07,040 INFO L125 PetriNetUnfolderBase]: For 97667/97683 co-relation queries the response was YES. [2024-06-20 16:32:07,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74414 conditions, 18697 events. 13790/18697 cut-off events. For 97667/97683 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 98552 event pairs, 6953 based on Foata normal form. 6/18700 useless extension candidates. Maximal degree in co-relation 74391. Up to 18525 conditions per place. [2024-06-20 16:32:07,162 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 93 selfloop transitions, 22 changer transitions 0/121 dead transitions. [2024-06-20 16:32:07,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 121 transitions, 814 flow [2024-06-20 16:32:07,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:07,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:07,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-20 16:32:07,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565826330532213 [2024-06-20 16:32:07,164 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 424 flow. Second operand 7 states and 163 transitions. [2024-06-20 16:32:07,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 121 transitions, 814 flow [2024-06-20 16:32:07,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 121 transitions, 753 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 16:32:07,183 INFO L231 Difference]: Finished difference. Result has 75 places, 83 transitions, 495 flow [2024-06-20 16:32:07,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=495, PETRI_PLACES=75, PETRI_TRANSITIONS=83} [2024-06-20 16:32:07,184 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 21 predicate places. [2024-06-20 16:32:07,184 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 83 transitions, 495 flow [2024-06-20 16:32:07,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:07,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:07,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:07,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:32:07,185 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)] === [2024-06-20 16:32:07,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:07,185 INFO L85 PathProgramCache]: Analyzing trace with hash -88826631, now seen corresponding path program 2 times [2024-06-20 16:32:07,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:07,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632222821] [2024-06-20 16:32:07,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:07,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:08,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:08,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632222821] [2024-06-20 16:32:08,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632222821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:08,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:08,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:32:08,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965872972] [2024-06-20 16:32:08,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:08,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:32:08,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:08,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:32:08,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:32:08,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:32:08,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 83 transitions, 495 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:08,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:08,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:32:08,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:10,018 INFO L124 PetriNetUnfolderBase]: 14014/19003 cut-off events. [2024-06-20 16:32:10,019 INFO L125 PetriNetUnfolderBase]: For 127479/127495 co-relation queries the response was YES. [2024-06-20 16:32:10,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82012 conditions, 19003 events. 14014/19003 cut-off events. For 127479/127495 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 100188 event pairs, 6728 based on Foata normal form. 28/19028 useless extension candidates. Maximal degree in co-relation 81987. Up to 18640 conditions per place. [2024-06-20 16:32:10,159 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 95 selfloop transitions, 32 changer transitions 0/133 dead transitions. [2024-06-20 16:32:10,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 133 transitions, 1033 flow [2024-06-20 16:32:10,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:10,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:10,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 16:32:10,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-20 16:32:10,161 INFO L175 Difference]: Start difference. First operand has 75 places, 83 transitions, 495 flow. Second operand 7 states and 168 transitions. [2024-06-20 16:32:10,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 133 transitions, 1033 flow [2024-06-20 16:32:10,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 133 transitions, 969 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-20 16:32:10,187 INFO L231 Difference]: Finished difference. Result has 80 places, 93 transitions, 653 flow [2024-06-20 16:32:10,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=653, PETRI_PLACES=80, PETRI_TRANSITIONS=93} [2024-06-20 16:32:10,188 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 26 predicate places. [2024-06-20 16:32:10,188 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 93 transitions, 653 flow [2024-06-20 16:32:10,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:10,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:10,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:10,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:32:10,189 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)] === [2024-06-20 16:32:10,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:10,189 INFO L85 PathProgramCache]: Analyzing trace with hash 88304889, now seen corresponding path program 3 times [2024-06-20 16:32:10,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:10,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524953776] [2024-06-20 16:32:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:10,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:11,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:11,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524953776] [2024-06-20 16:32:11,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524953776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:11,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:11,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:32:11,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516473147] [2024-06-20 16:32:11,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:11,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:32:11,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:11,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:32:11,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:32:11,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:32:11,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 93 transitions, 653 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:11,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:11,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:32:11,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:13,121 INFO L124 PetriNetUnfolderBase]: 14052/19064 cut-off events. [2024-06-20 16:32:13,121 INFO L125 PetriNetUnfolderBase]: For 162193/162243 co-relation queries the response was YES. [2024-06-20 16:32:13,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89161 conditions, 19064 events. 14052/19064 cut-off events. For 162193/162243 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 101022 event pairs, 6352 based on Foata normal form. 30/19085 useless extension candidates. Maximal degree in co-relation 89134. Up to 18502 conditions per place. [2024-06-20 16:32:13,247 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 87 selfloop transitions, 51 changer transitions 0/144 dead transitions. [2024-06-20 16:32:13,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 144 transitions, 1303 flow [2024-06-20 16:32:13,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:13,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:13,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 16:32:13,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484593837535014 [2024-06-20 16:32:13,249 INFO L175 Difference]: Start difference. First operand has 80 places, 93 transitions, 653 flow. Second operand 7 states and 173 transitions. [2024-06-20 16:32:13,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 144 transitions, 1303 flow [2024-06-20 16:32:13,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 144 transitions, 1235 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-20 16:32:13,285 INFO L231 Difference]: Finished difference. Result has 85 places, 103 transitions, 862 flow [2024-06-20 16:32:13,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=862, PETRI_PLACES=85, PETRI_TRANSITIONS=103} [2024-06-20 16:32:13,286 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 31 predicate places. [2024-06-20 16:32:13,286 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 103 transitions, 862 flow [2024-06-20 16:32:13,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:13,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:13,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:13,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:32:13,287 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:32:13,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:13,287 INFO L85 PathProgramCache]: Analyzing trace with hash 85577923, now seen corresponding path program 1 times [2024-06-20 16:32:13,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:13,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69382017] [2024-06-20 16:32:13,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:13,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:14,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:14,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69382017] [2024-06-20 16:32:14,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69382017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:14,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:14,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:14,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708482532] [2024-06-20 16:32:14,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:14,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:14,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:14,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:14,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:14,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:32:14,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 103 transitions, 862 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:14,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:14,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:32:14,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:16,465 INFO L124 PetriNetUnfolderBase]: 12368/16997 cut-off events. [2024-06-20 16:32:16,466 INFO L125 PetriNetUnfolderBase]: For 164139/164139 co-relation queries the response was YES. [2024-06-20 16:32:16,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83045 conditions, 16997 events. 12368/16997 cut-off events. For 164139/164139 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 90370 event pairs, 5500 based on Foata normal form. 6/17000 useless extension candidates. Maximal degree in co-relation 83015. Up to 16677 conditions per place. [2024-06-20 16:32:16,592 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 119 selfloop transitions, 21 changer transitions 0/145 dead transitions. [2024-06-20 16:32:16,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 145 transitions, 1298 flow [2024-06-20 16:32:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:32:16,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:32:16,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-20 16:32:16,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2024-06-20 16:32:16,595 INFO L175 Difference]: Start difference. First operand has 85 places, 103 transitions, 862 flow. Second operand 8 states and 176 transitions. [2024-06-20 16:32:16,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 145 transitions, 1298 flow [2024-06-20 16:32:16,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 145 transitions, 1149 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-20 16:32:16,667 INFO L231 Difference]: Finished difference. Result has 89 places, 106 transitions, 827 flow [2024-06-20 16:32:16,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=827, PETRI_PLACES=89, PETRI_TRANSITIONS=106} [2024-06-20 16:32:16,668 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 35 predicate places. [2024-06-20 16:32:16,668 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 106 transitions, 827 flow [2024-06-20 16:32:16,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:16,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:16,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:16,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:32:16,669 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)] === [2024-06-20 16:32:16,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:16,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1178784783, now seen corresponding path program 1 times [2024-06-20 16:32:16,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:16,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363023799] [2024-06-20 16:32:16,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:16,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:17,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:17,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363023799] [2024-06-20 16:32:17,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363023799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:17,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:17,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:32:17,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376546167] [2024-06-20 16:32:17,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:17,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:32:17,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:17,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:32:17,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:32:17,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:32:17,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 106 transitions, 827 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:17,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:17,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:32:17,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:19,242 INFO L124 PetriNetUnfolderBase]: 12361/17146 cut-off events. [2024-06-20 16:32:19,243 INFO L125 PetriNetUnfolderBase]: For 166353/166353 co-relation queries the response was YES. [2024-06-20 16:32:19,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82766 conditions, 17146 events. 12361/17146 cut-off events. For 166353/166353 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 92131 event pairs, 5561 based on Foata normal form. 2/17145 useless extension candidates. Maximal degree in co-relation 82735. Up to 16734 conditions per place. [2024-06-20 16:32:19,375 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 109 selfloop transitions, 10 changer transitions 0/124 dead transitions. [2024-06-20 16:32:19,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 124 transitions, 1147 flow [2024-06-20 16:32:19,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:32:19,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:32:19,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-06-20 16:32:19,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42745098039215684 [2024-06-20 16:32:19,376 INFO L175 Difference]: Start difference. First operand has 89 places, 106 transitions, 827 flow. Second operand 5 states and 109 transitions. [2024-06-20 16:32:19,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 124 transitions, 1147 flow [2024-06-20 16:32:19,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 124 transitions, 1063 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 16:32:19,442 INFO L231 Difference]: Finished difference. Result has 88 places, 110 transitions, 826 flow [2024-06-20 16:32:19,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=743, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=826, PETRI_PLACES=88, PETRI_TRANSITIONS=110} [2024-06-20 16:32:19,443 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 34 predicate places. [2024-06-20 16:32:19,443 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 110 transitions, 826 flow [2024-06-20 16:32:19,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:19,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:19,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:19,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:32:19,444 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)] === [2024-06-20 16:32:19,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:19,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1537534158, now seen corresponding path program 1 times [2024-06-20 16:32:19,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:19,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414024692] [2024-06-20 16:32:19,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:19,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:19,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:20,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:20,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414024692] [2024-06-20 16:32:20,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414024692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:20,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:20,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:20,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609956172] [2024-06-20 16:32:20,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:20,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:20,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:20,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:20,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:20,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:32:20,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 110 transitions, 826 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:20,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:20,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:32:20,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:22,563 INFO L124 PetriNetUnfolderBase]: 14021/19015 cut-off events. [2024-06-20 16:32:22,564 INFO L125 PetriNetUnfolderBase]: For 229351/229383 co-relation queries the response was YES. [2024-06-20 16:32:22,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99561 conditions, 19015 events. 14021/19015 cut-off events. For 229351/229383 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 100400 event pairs, 6291 based on Foata normal form. 11/19023 useless extension candidates. Maximal degree in co-relation 99529. Up to 18828 conditions per place. [2024-06-20 16:32:22,725 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 121 selfloop transitions, 25 changer transitions 0/152 dead transitions. [2024-06-20 16:32:22,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 152 transitions, 1287 flow [2024-06-20 16:32:22,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:22,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:22,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-20 16:32:22,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565826330532213 [2024-06-20 16:32:22,727 INFO L175 Difference]: Start difference. First operand has 88 places, 110 transitions, 826 flow. Second operand 7 states and 163 transitions. [2024-06-20 16:32:22,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 152 transitions, 1287 flow [2024-06-20 16:32:22,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 152 transitions, 1234 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-20 16:32:22,827 INFO L231 Difference]: Finished difference. Result has 92 places, 114 transitions, 916 flow [2024-06-20 16:32:22,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=773, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=916, PETRI_PLACES=92, PETRI_TRANSITIONS=114} [2024-06-20 16:32:22,827 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 38 predicate places. [2024-06-20 16:32:22,828 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 114 transitions, 916 flow [2024-06-20 16:32:22,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:22,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:22,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:22,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:32:22,828 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)] === [2024-06-20 16:32:22,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:22,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1541349390, now seen corresponding path program 1 times [2024-06-20 16:32:22,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:22,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50579614] [2024-06-20 16:32:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:22,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:23,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:23,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50579614] [2024-06-20 16:32:23,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50579614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:23,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:23,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:23,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279224293] [2024-06-20 16:32:23,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:23,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:23,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:23,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:23,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:23,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 51 [2024-06-20 16:32:23,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 114 transitions, 916 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:23,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:23,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 51 [2024-06-20 16:32:23,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:26,077 INFO L124 PetriNetUnfolderBase]: 14356/19381 cut-off events. [2024-06-20 16:32:26,077 INFO L125 PetriNetUnfolderBase]: For 244184/244184 co-relation queries the response was YES. [2024-06-20 16:32:26,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100305 conditions, 19381 events. 14356/19381 cut-off events. For 244184/244184 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 99318 event pairs, 6127 based on Foata normal form. 9/19387 useless extension candidates. Maximal degree in co-relation 100272. Up to 19021 conditions per place. [2024-06-20 16:32:26,226 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 122 selfloop transitions, 48 changer transitions 0/174 dead transitions. [2024-06-20 16:32:26,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 174 transitions, 1524 flow [2024-06-20 16:32:26,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:32:26,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:32:26,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 16:32:26,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411764705882353 [2024-06-20 16:32:26,229 INFO L175 Difference]: Start difference. First operand has 92 places, 114 transitions, 916 flow. Second operand 8 states and 180 transitions. [2024-06-20 16:32:26,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 174 transitions, 1524 flow [2024-06-20 16:32:26,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 174 transitions, 1374 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-20 16:32:26,361 INFO L231 Difference]: Finished difference. Result has 96 places, 129 transitions, 1042 flow [2024-06-20 16:32:26,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1042, PETRI_PLACES=96, PETRI_TRANSITIONS=129} [2024-06-20 16:32:26,362 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 42 predicate places. [2024-06-20 16:32:26,362 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 129 transitions, 1042 flow [2024-06-20 16:32:26,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:26,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:26,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:26,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:32:26,362 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)] === [2024-06-20 16:32:26,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:26,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2015659114, now seen corresponding path program 2 times [2024-06-20 16:32:26,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:26,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176764444] [2024-06-20 16:32:26,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:26,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:27,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:27,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176764444] [2024-06-20 16:32:27,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176764444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:27,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:27,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:27,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239516572] [2024-06-20 16:32:27,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:27,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:27,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:27,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:27,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:27,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 51 [2024-06-20 16:32:27,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 129 transitions, 1042 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:27,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:27,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 51 [2024-06-20 16:32:27,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:29,828 INFO L124 PetriNetUnfolderBase]: 14400/19444 cut-off events. [2024-06-20 16:32:29,828 INFO L125 PetriNetUnfolderBase]: For 266725/266743 co-relation queries the response was YES. [2024-06-20 16:32:29,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103003 conditions, 19444 events. 14400/19444 cut-off events. For 266725/266743 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 99717 event pairs, 6137 based on Foata normal form. 17/19456 useless extension candidates. Maximal degree in co-relation 102968. Up to 19284 conditions per place. [2024-06-20 16:32:29,990 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 138 selfloop transitions, 35 changer transitions 0/177 dead transitions. [2024-06-20 16:32:29,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 177 transitions, 1590 flow [2024-06-20 16:32:29,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:32:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:32:29,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-20 16:32:29,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42401960784313725 [2024-06-20 16:32:29,992 INFO L175 Difference]: Start difference. First operand has 96 places, 129 transitions, 1042 flow. Second operand 8 states and 173 transitions. [2024-06-20 16:32:29,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 177 transitions, 1590 flow [2024-06-20 16:32:30,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 177 transitions, 1514 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 16:32:30,132 INFO L231 Difference]: Finished difference. Result has 101 places, 138 transitions, 1163 flow [2024-06-20 16:32:30,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=968, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1163, PETRI_PLACES=101, PETRI_TRANSITIONS=138} [2024-06-20 16:32:30,132 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 47 predicate places. [2024-06-20 16:32:30,133 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 138 transitions, 1163 flow [2024-06-20 16:32:30,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:30,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:30,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:30,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:32:30,133 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)] === [2024-06-20 16:32:30,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:30,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1642326562, now seen corresponding path program 3 times [2024-06-20 16:32:30,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:30,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79560536] [2024-06-20 16:32:30,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:30,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:31,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:31,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79560536] [2024-06-20 16:32:31,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79560536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:31,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:31,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:31,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911824325] [2024-06-20 16:32:31,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:31,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:31,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:31,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:31,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:31,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 51 [2024-06-20 16:32:31,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 138 transitions, 1163 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:31,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:31,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 51 [2024-06-20 16:32:31,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:33,730 INFO L124 PetriNetUnfolderBase]: 14422/19474 cut-off events. [2024-06-20 16:32:33,730 INFO L125 PetriNetUnfolderBase]: For 291770/291788 co-relation queries the response was YES. [2024-06-20 16:32:33,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105633 conditions, 19474 events. 14422/19474 cut-off events. For 291770/291788 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 99796 event pairs, 6137 based on Foata normal form. 17/19486 useless extension candidates. Maximal degree in co-relation 105595. Up to 19314 conditions per place. [2024-06-20 16:32:33,951 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 141 selfloop transitions, 40 changer transitions 0/185 dead transitions. [2024-06-20 16:32:33,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 185 transitions, 1741 flow [2024-06-20 16:32:33,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:32:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:32:33,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-20 16:32:33,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215686274509804 [2024-06-20 16:32:33,968 INFO L175 Difference]: Start difference. First operand has 101 places, 138 transitions, 1163 flow. Second operand 8 states and 172 transitions. [2024-06-20 16:32:33,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 185 transitions, 1741 flow [2024-06-20 16:32:34,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 185 transitions, 1622 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 16:32:34,144 INFO L231 Difference]: Finished difference. Result has 105 places, 147 transitions, 1276 flow [2024-06-20 16:32:34,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1276, PETRI_PLACES=105, PETRI_TRANSITIONS=147} [2024-06-20 16:32:34,144 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 51 predicate places. [2024-06-20 16:32:34,145 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 147 transitions, 1276 flow [2024-06-20 16:32:34,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:34,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:34,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:34,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:32:34,145 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:32:34,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:34,146 INFO L85 PathProgramCache]: Analyzing trace with hash 2015868364, now seen corresponding path program 4 times [2024-06-20 16:32:34,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:34,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202256932] [2024-06-20 16:32:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:34,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:35,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:35,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202256932] [2024-06-20 16:32:35,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202256932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:35,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:35,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:35,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866236208] [2024-06-20 16:32:35,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:35,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:35,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:35,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:35,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:35,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 51 [2024-06-20 16:32:35,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 147 transitions, 1276 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:35,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:35,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 51 [2024-06-20 16:32:35,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:37,792 INFO L124 PetriNetUnfolderBase]: 14401/19444 cut-off events. [2024-06-20 16:32:37,792 INFO L125 PetriNetUnfolderBase]: For 314329/314347 co-relation queries the response was YES. [2024-06-20 16:32:37,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107023 conditions, 19444 events. 14401/19444 cut-off events. For 314329/314347 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 99716 event pairs, 6137 based on Foata normal form. 17/19456 useless extension candidates. Maximal degree in co-relation 106983. Up to 19224 conditions per place. [2024-06-20 16:32:37,954 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 138 selfloop transitions, 56 changer transitions 0/198 dead transitions. [2024-06-20 16:32:37,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 198 transitions, 1866 flow [2024-06-20 16:32:37,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:32:37,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:32:37,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-20 16:32:37,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.420479302832244 [2024-06-20 16:32:37,962 INFO L175 Difference]: Start difference. First operand has 105 places, 147 transitions, 1276 flow. Second operand 9 states and 193 transitions. [2024-06-20 16:32:37,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 198 transitions, 1866 flow [2024-06-20 16:32:38,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 198 transitions, 1772 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-20 16:32:38,211 INFO L231 Difference]: Finished difference. Result has 112 places, 153 transitions, 1423 flow [2024-06-20 16:32:38,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1423, PETRI_PLACES=112, PETRI_TRANSITIONS=153} [2024-06-20 16:32:38,212 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2024-06-20 16:32:38,212 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 153 transitions, 1423 flow [2024-06-20 16:32:38,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:38,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:38,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:38,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:32:38,213 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:32:38,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:38,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2112378865, now seen corresponding path program 1 times [2024-06-20 16:32:38,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:38,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348619951] [2024-06-20 16:32:38,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:38,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:39,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:39,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348619951] [2024-06-20 16:32:39,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348619951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:39,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:39,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:32:39,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575631028] [2024-06-20 16:32:39,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:39,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:32:39,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:39,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:32:39,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:32:39,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:32:39,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 153 transitions, 1423 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:39,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:39,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:32:39,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:41,583 INFO L124 PetriNetUnfolderBase]: 12375/17176 cut-off events. [2024-06-20 16:32:41,584 INFO L125 PetriNetUnfolderBase]: For 282635/282635 co-relation queries the response was YES. [2024-06-20 16:32:41,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95252 conditions, 17176 events. 12375/17176 cut-off events. For 282635/282635 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 92208 event pairs, 5068 based on Foata normal form. 8/17180 useless extension candidates. Maximal degree in co-relation 95210. Up to 16662 conditions per place. [2024-06-20 16:32:42,033 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 165 selfloop transitions, 22 changer transitions 0/192 dead transitions. [2024-06-20 16:32:42,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 192 transitions, 2065 flow [2024-06-20 16:32:42,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:32:42,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:32:42,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-20 16:32:42,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2024-06-20 16:32:42,051 INFO L175 Difference]: Start difference. First operand has 112 places, 153 transitions, 1423 flow. Second operand 6 states and 138 transitions. [2024-06-20 16:32:42,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 192 transitions, 2065 flow [2024-06-20 16:32:42,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 192 transitions, 1910 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 16:32:42,207 INFO L231 Difference]: Finished difference. Result has 114 places, 167 transitions, 1496 flow [2024-06-20 16:32:42,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1496, PETRI_PLACES=114, PETRI_TRANSITIONS=167} [2024-06-20 16:32:42,208 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 60 predicate places. [2024-06-20 16:32:42,208 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 167 transitions, 1496 flow [2024-06-20 16:32:42,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:42,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:42,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:42,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:32:42,209 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)] === [2024-06-20 16:32:42,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:42,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1488574752, now seen corresponding path program 1 times [2024-06-20 16:32:42,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:42,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732350768] [2024-06-20 16:32:42,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:42,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:43,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:43,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732350768] [2024-06-20 16:32:43,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732350768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:43,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:43,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:43,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595987311] [2024-06-20 16:32:43,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:43,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:43,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:43,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:43,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:43,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:32:43,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 167 transitions, 1496 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:43,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:43,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:32:43,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:45,890 INFO L124 PetriNetUnfolderBase]: 13917/18987 cut-off events. [2024-06-20 16:32:45,891 INFO L125 PetriNetUnfolderBase]: For 362058/362058 co-relation queries the response was YES. [2024-06-20 16:32:45,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112333 conditions, 18987 events. 13917/18987 cut-off events. For 362058/362058 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 100365 event pairs, 4880 based on Foata normal form. 6/18990 useless extension candidates. Maximal degree in co-relation 112288. Up to 18720 conditions per place. [2024-06-20 16:32:46,052 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 184 selfloop transitions, 23 changer transitions 0/216 dead transitions. [2024-06-20 16:32:46,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 216 transitions, 2098 flow [2024-06-20 16:32:46,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:32:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:32:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 16:32:46,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485294117647059 [2024-06-20 16:32:46,053 INFO L175 Difference]: Start difference. First operand has 114 places, 167 transitions, 1496 flow. Second operand 8 states and 183 transitions. [2024-06-20 16:32:46,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 216 transitions, 2098 flow [2024-06-20 16:32:46,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 216 transitions, 2052 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-20 16:32:46,282 INFO L231 Difference]: Finished difference. Result has 121 places, 170 transitions, 1582 flow [2024-06-20 16:32:46,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1450, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1582, PETRI_PLACES=121, PETRI_TRANSITIONS=170} [2024-06-20 16:32:46,283 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 67 predicate places. [2024-06-20 16:32:46,283 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 170 transitions, 1582 flow [2024-06-20 16:32:46,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:46,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:46,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:46,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:32:46,284 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)] === [2024-06-20 16:32:46,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:46,284 INFO L85 PathProgramCache]: Analyzing trace with hash 418920376, now seen corresponding path program 2 times [2024-06-20 16:32:46,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:46,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688040101] [2024-06-20 16:32:46,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:46,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:47,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:47,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688040101] [2024-06-20 16:32:47,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688040101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:47,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:47,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:47,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609259949] [2024-06-20 16:32:47,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:47,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:47,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:47,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:47,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:47,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:32:47,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 170 transitions, 1582 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:47,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:47,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:32:47,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:50,164 INFO L124 PetriNetUnfolderBase]: 13981/19083 cut-off events. [2024-06-20 16:32:50,164 INFO L125 PetriNetUnfolderBase]: For 406904/406904 co-relation queries the response was YES. [2024-06-20 16:32:50,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116647 conditions, 19083 events. 13981/19083 cut-off events. For 406904/406904 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 101020 event pairs, 5503 based on Foata normal form. 12/19092 useless extension candidates. Maximal degree in co-relation 116599. Up to 18767 conditions per place. [2024-06-20 16:32:50,342 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 176 selfloop transitions, 34 changer transitions 0/219 dead transitions. [2024-06-20 16:32:50,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 219 transitions, 2198 flow [2024-06-20 16:32:50,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:32:50,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:32:50,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-20 16:32:50,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2024-06-20 16:32:50,346 INFO L175 Difference]: Start difference. First operand has 121 places, 170 transitions, 1582 flow. Second operand 8 states and 184 transitions. [2024-06-20 16:32:50,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 219 transitions, 2198 flow [2024-06-20 16:32:50,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 219 transitions, 2092 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-20 16:32:50,852 INFO L231 Difference]: Finished difference. Result has 123 places, 173 transitions, 1639 flow [2024-06-20 16:32:50,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1639, PETRI_PLACES=123, PETRI_TRANSITIONS=173} [2024-06-20 16:32:50,853 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 69 predicate places. [2024-06-20 16:32:50,853 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 173 transitions, 1639 flow [2024-06-20 16:32:50,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:50,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:50,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:50,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:32:50,854 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)] === [2024-06-20 16:32:50,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:50,854 INFO L85 PathProgramCache]: Analyzing trace with hash 537008056, now seen corresponding path program 3 times [2024-06-20 16:32:50,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:50,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857278675] [2024-06-20 16:32:50,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:50,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:52,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:52,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857278675] [2024-06-20 16:32:52,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857278675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:52,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:52,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:52,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77126165] [2024-06-20 16:32:52,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:52,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:52,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:52,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:52,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:52,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:32:52,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 173 transitions, 1639 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:52,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:52,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:32:52,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:54,837 INFO L124 PetriNetUnfolderBase]: 14037/19171 cut-off events. [2024-06-20 16:32:54,838 INFO L125 PetriNetUnfolderBase]: For 457303/457303 co-relation queries the response was YES. [2024-06-20 16:32:54,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120974 conditions, 19171 events. 14037/19171 cut-off events. For 457303/457303 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 101649 event pairs, 5510 based on Foata normal form. 12/19180 useless extension candidates. Maximal degree in co-relation 120925. Up to 18818 conditions per place. [2024-06-20 16:32:55,055 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 164 selfloop transitions, 47 changer transitions 0/220 dead transitions. [2024-06-20 16:32:55,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 220 transitions, 2259 flow [2024-06-20 16:32:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:32:55,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:32:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-20 16:32:55,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2024-06-20 16:32:55,057 INFO L175 Difference]: Start difference. First operand has 123 places, 173 transitions, 1639 flow. Second operand 8 states and 184 transitions. [2024-06-20 16:32:55,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 220 transitions, 2259 flow [2024-06-20 16:32:55,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 220 transitions, 2128 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-20 16:32:55,360 INFO L231 Difference]: Finished difference. Result has 125 places, 176 transitions, 1701 flow [2024-06-20 16:32:55,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1701, PETRI_PLACES=125, PETRI_TRANSITIONS=176} [2024-06-20 16:32:55,361 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 71 predicate places. [2024-06-20 16:32:55,361 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 176 transitions, 1701 flow [2024-06-20 16:32:55,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:55,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:55,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:55,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:32:55,361 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:32:55,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:55,362 INFO L85 PathProgramCache]: Analyzing trace with hash -2104714120, now seen corresponding path program 1 times [2024-06-20 16:32:55,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:55,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997742280] [2024-06-20 16:32:55,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:55,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:56,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:56,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997742280] [2024-06-20 16:32:56,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997742280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:56,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:56,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:56,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146799572] [2024-06-20 16:32:56,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:56,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:56,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:56,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:56,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:56,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 51 [2024-06-20 16:32:56,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 176 transitions, 1701 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:56,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:56,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 51 [2024-06-20 16:32:56,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:59,545 INFO L124 PetriNetUnfolderBase]: 14863/20109 cut-off events. [2024-06-20 16:32:59,545 INFO L125 PetriNetUnfolderBase]: For 515486/515486 co-relation queries the response was YES. [2024-06-20 16:32:59,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127792 conditions, 20109 events. 14863/20109 cut-off events. For 515486/515486 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 103804 event pairs, 5669 based on Foata normal form. 36/20142 useless extension candidates. Maximal degree in co-relation 127742. Up to 19521 conditions per place. [2024-06-20 16:32:59,785 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 176 selfloop transitions, 55 changer transitions 0/235 dead transitions. [2024-06-20 16:32:59,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 235 transitions, 2399 flow [2024-06-20 16:32:59,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:32:59,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:32:59,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-20 16:32:59,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 16:32:59,787 INFO L175 Difference]: Start difference. First operand has 125 places, 176 transitions, 1701 flow. Second operand 9 states and 204 transitions. [2024-06-20 16:32:59,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 235 transitions, 2399 flow [2024-06-20 16:33:00,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 235 transitions, 2243 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-20 16:33:00,455 INFO L231 Difference]: Finished difference. Result has 129 places, 179 transitions, 1751 flow [2024-06-20 16:33:00,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1751, PETRI_PLACES=129, PETRI_TRANSITIONS=179} [2024-06-20 16:33:00,456 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 75 predicate places. [2024-06-20 16:33:00,456 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 179 transitions, 1751 flow [2024-06-20 16:33:00,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:00,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:00,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:00,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:33:00,457 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)] === [2024-06-20 16:33:00,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:00,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1047795152, now seen corresponding path program 1 times [2024-06-20 16:33:00,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:00,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565051154] [2024-06-20 16:33:00,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:00,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:01,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:01,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565051154] [2024-06-20 16:33:01,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565051154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:01,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:01,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:33:01,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378718840] [2024-06-20 16:33:01,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:01,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:33:01,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:01,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:33:01,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:33:01,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 51 [2024-06-20 16:33:01,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 179 transitions, 1751 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:01,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:01,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 51 [2024-06-20 16:33:01,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:04,188 INFO L124 PetriNetUnfolderBase]: 14879/20131 cut-off events. [2024-06-20 16:33:04,188 INFO L125 PetriNetUnfolderBase]: For 546015/546021 co-relation queries the response was YES. [2024-06-20 16:33:04,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131161 conditions, 20131 events. 14879/20131 cut-off events. For 546015/546021 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 103627 event pairs, 5692 based on Foata normal form. 6/20133 useless extension candidates. Maximal degree in co-relation 131110. Up to 20064 conditions per place. [2024-06-20 16:33:04,376 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 188 selfloop transitions, 21 changer transitions 0/213 dead transitions. [2024-06-20 16:33:04,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 213 transitions, 2463 flow [2024-06-20 16:33:04,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:33:04,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:33:04,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-20 16:33:04,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2024-06-20 16:33:04,377 INFO L175 Difference]: Start difference. First operand has 129 places, 179 transitions, 1751 flow. Second operand 6 states and 132 transitions. [2024-06-20 16:33:04,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 213 transitions, 2463 flow [2024-06-20 16:33:04,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 213 transitions, 2303 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-20 16:33:04,855 INFO L231 Difference]: Finished difference. Result has 128 places, 187 transitions, 1790 flow [2024-06-20 16:33:04,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1790, PETRI_PLACES=128, PETRI_TRANSITIONS=187} [2024-06-20 16:33:04,856 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 74 predicate places. [2024-06-20 16:33:04,856 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 187 transitions, 1790 flow [2024-06-20 16:33:04,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:04,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:04,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:04,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:33:04,857 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:33:04,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:04,857 INFO L85 PathProgramCache]: Analyzing trace with hash 709081240, now seen corresponding path program 1 times [2024-06-20 16:33:04,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:04,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429410054] [2024-06-20 16:33:04,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:04,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:06,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:06,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429410054] [2024-06-20 16:33:06,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429410054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:06,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:06,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:06,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22172982] [2024-06-20 16:33:06,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:06,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:06,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:06,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:06,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:06,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 51 [2024-06-20 16:33:06,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 187 transitions, 1790 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:06,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:06,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 51 [2024-06-20 16:33:06,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:09,046 INFO L124 PetriNetUnfolderBase]: 14967/20257 cut-off events. [2024-06-20 16:33:09,047 INFO L125 PetriNetUnfolderBase]: For 589250/589270 co-relation queries the response was YES. [2024-06-20 16:33:09,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134731 conditions, 20257 events. 14967/20257 cut-off events. For 589250/589270 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 104117 event pairs, 5699 based on Foata normal form. 17/20265 useless extension candidates. Maximal degree in co-relation 134679. Up to 19748 conditions per place. [2024-06-20 16:33:09,245 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 171 selfloop transitions, 76 changer transitions 0/251 dead transitions. [2024-06-20 16:33:09,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 251 transitions, 2549 flow [2024-06-20 16:33:09,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:33:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:33:09,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-20 16:33:09,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357298474945534 [2024-06-20 16:33:09,249 INFO L175 Difference]: Start difference. First operand has 128 places, 187 transitions, 1790 flow. Second operand 9 states and 200 transitions. [2024-06-20 16:33:09,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 251 transitions, 2549 flow [2024-06-20 16:33:09,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 251 transitions, 2469 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-20 16:33:09,643 INFO L231 Difference]: Finished difference. Result has 136 places, 202 transitions, 2049 flow [2024-06-20 16:33:09,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1710, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2049, PETRI_PLACES=136, PETRI_TRANSITIONS=202} [2024-06-20 16:33:09,643 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 82 predicate places. [2024-06-20 16:33:09,643 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 202 transitions, 2049 flow [2024-06-20 16:33:09,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:09,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:09,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:09,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:33:09,645 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)] === [2024-06-20 16:33:09,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:09,645 INFO L85 PathProgramCache]: Analyzing trace with hash 627486050, now seen corresponding path program 2 times [2024-06-20 16:33:09,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:09,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125709169] [2024-06-20 16:33:09,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:09,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:10,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:10,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:10,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125709169] [2024-06-20 16:33:10,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125709169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:10,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:10,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:10,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602201449] [2024-06-20 16:33:10,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:10,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:10,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:10,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:10,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:11,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 51 [2024-06-20 16:33:11,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 202 transitions, 2049 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:11,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:11,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 51 [2024-06-20 16:33:11,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand