./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_rmo.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe025_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe025_rmo.i ./goblint.2024-06-19_11-23-25.files/protection/safe025_rmo.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-eb4cb34-m [2024-06-21 17:51:10,890 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:51:10,957 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:51:10,961 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:51:10,961 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:51:10,986 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:51:10,987 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:51:10,987 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:51:10,988 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:51:10,991 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:51:10,991 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:51:10,991 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:51:10,992 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:51:10,993 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:51:10,993 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:51:10,994 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:51:10,994 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:51:10,994 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:51:10,994 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:51:10,995 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:51:10,995 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:51:10,995 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:51:10,995 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:51:10,996 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:51:10,996 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:51:10,996 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:51:10,996 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:51:10,996 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:51:10,997 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:51:10,997 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:51:10,998 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:51:10,998 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:51:10,998 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:51:10,998 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:51:10,999 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:51:10,999 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:51:10,999 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:51:10,999 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:51:10,999 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:51:11,000 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:51:11,000 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:51:11,000 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:51:11,001 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:51:11,001 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:51:11,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:51:11,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:51:11,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:51:11,221 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:51:11,222 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:51:11,223 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe025_rmo.yml/witness.yml [2024-06-21 17:51:11,388 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:51:11,388 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:51:11,388 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_rmo.i [2024-06-21 17:51:12,370 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:51:12,547 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:51:12,547 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_rmo.i [2024-06-21 17:51:12,559 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/275d35376/de3f4ef8e7e9467eba25a5503191899d/FLAGf951e00c8 [2024-06-21 17:51:12,571 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/275d35376/de3f4ef8e7e9467eba25a5503191899d [2024-06-21 17:51:12,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:51:12,572 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:51:12,573 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:51:12,573 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:51:12,577 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:51:12,578 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:51:11" (1/2) ... [2024-06-21 17:51:12,578 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@755b5f3b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:51:12, skipping insertion in model container [2024-06-21 17:51:12,578 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:51:11" (1/2) ... [2024-06-21 17:51:12,579 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1e9c9cee and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:51:12, skipping insertion in model container [2024-06-21 17:51:12,580 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:51:12" (2/2) ... [2024-06-21 17:51:12,580 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@755b5f3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:51:12, skipping insertion in model container [2024-06-21 17:51:12,580 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:51:12" (2/2) ... [2024-06-21 17:51:12,580 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:51:12,728 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:51:12,729 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0) [2024-06-21 17:51:12,729 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0) [2024-06-21 17:51:12,730 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0) [2024-06-21 17:51:12,730 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:51:12,730 INFO L106 edCorrectnessWitness]: ghost_update [L855-L855] multithreaded = 1; [2024-06-21 17:51:12,769 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:51:13,146 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:51:13,159 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:51:13,300 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:51:13,343 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:51:13,344 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:51:13 WrapperNode [2024-06-21 17:51:13,344 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:51:13,345 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:51:13,345 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:51:13,346 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:51:13,351 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:51:13" (1/1) ... [2024-06-21 17:51:13,389 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:51:13" (1/1) ... [2024-06-21 17:51:13,432 INFO L138 Inliner]: procedures = 175, calls = 91, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 225 [2024-06-21 17:51:13,433 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:51:13,434 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:51:13,434 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:51:13,434 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:51:13,443 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:51:13" (1/1) ... [2024-06-21 17:51:13,443 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:51:13" (1/1) ... [2024-06-21 17:51:13,449 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:51:13" (1/1) ... [2024-06-21 17:51:13,467 INFO L175 MemorySlicer]: Split 48 memory accesses to 2 slices as follows [2, 46]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-21 17:51:13,468 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:51:13" (1/1) ... [2024-06-21 17:51:13,468 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:51:13" (1/1) ... [2024-06-21 17:51:13,486 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:51:13" (1/1) ... [2024-06-21 17:51:13,488 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:51:13" (1/1) ... [2024-06-21 17:51:13,501 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:51:13" (1/1) ... [2024-06-21 17:51:13,504 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:51:13" (1/1) ... [2024-06-21 17:51:13,509 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:51:13,514 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:51:13,515 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:51:13,515 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:51:13,516 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:51:13" (1/1) ... [2024-06-21 17:51:13,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:51:13,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:51:13,540 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) [2024-06-21 17:51:13,544 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 [2024-06-21 17:51:13,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 17:51:13,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 17:51:13,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 17:51:13,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 17:51:13,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:51:13,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:51:13,572 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:51:13,572 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:51:13,572 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:51:13,572 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:51:13,573 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:51:13,573 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:51:13,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:51:13,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 17:51:13,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:51:13,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:51:13,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:51:13,577 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:51:13,709 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:51:13,711 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:51:14,250 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:51:14,250 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:51:14,557 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:51:14,557 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:51:14,557 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:51:14 BoogieIcfgContainer [2024-06-21 17:51:14,557 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:51:14,559 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:51:14,559 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:51:14,561 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:51:14,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:51:11" (1/4) ... [2024-06-21 17:51:14,562 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c82138 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:51:14, skipping insertion in model container [2024-06-21 17:51:14,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:51:12" (2/4) ... [2024-06-21 17:51:14,563 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c82138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:51:14, skipping insertion in model container [2024-06-21 17:51:14,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:51:13" (3/4) ... [2024-06-21 17:51:14,563 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c82138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:51:14, skipping insertion in model container [2024-06-21 17:51:14,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:51:14" (4/4) ... [2024-06-21 17:51:14,564 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_rmo.i [2024-06-21 17:51:14,578 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:51:14,578 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:51:14,578 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:51:14,622 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:51:14,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 17:51:14,669 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-21 17:51:14,669 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:51:14,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:51:14,672 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 17:51:14,674 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-21 17:51:14,680 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:51:14,685 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;@47112922, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:51:14,685 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:51:14,689 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:51:14,689 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 17:51:14,689 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:51:14,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:14,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:51:14,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:14,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:14,694 INFO L85 PathProgramCache]: Analyzing trace with hash 805342282, now seen corresponding path program 1 times [2024-06-21 17:51:14,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:14,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069323996] [2024-06-21 17:51:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:14,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:16,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:16,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069323996] [2024-06-21 17:51:16,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069323996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:16,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:16,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:51:16,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499480768] [2024-06-21 17:51:16,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:16,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:51:16,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:16,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:51:16,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:51:16,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 17:51:16,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:16,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:16,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 17:51:16,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:16,770 INFO L124 PetriNetUnfolderBase]: 1205/1912 cut-off events. [2024-06-21 17:51:16,770 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 17:51:16,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3817 conditions, 1912 events. 1205/1912 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9498 event pairs, 800 based on Foata normal form. 1/1879 useless extension candidates. Maximal degree in co-relation 3805. Up to 1818 conditions per place. [2024-06-21 17:51:16,782 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-21 17:51:16,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 185 flow [2024-06-21 17:51:16,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:51:16,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:51:16,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-21 17:51:16,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-21 17:51:16,793 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 72 transitions. [2024-06-21 17:51:16,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 185 flow [2024-06-21 17:51:16,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 180 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:51:16,797 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-21 17:51:16,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-21 17:51:16,800 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-21 17:51:16,801 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-21 17:51:16,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:16,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:16,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:16,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:51:16,802 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:16,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:16,802 INFO L85 PathProgramCache]: Analyzing trace with hash 839969089, now seen corresponding path program 1 times [2024-06-21 17:51:16,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:16,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649432064] [2024-06-21 17:51:16,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:16,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:18,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:18,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649432064] [2024-06-21 17:51:18,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649432064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:18,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:18,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:51:18,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337685926] [2024-06-21 17:51:18,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:18,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:51:18,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:18,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:51:18,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:51:18,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:51:18,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:18,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:18,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:51:18,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:18,614 INFO L124 PetriNetUnfolderBase]: 1400/2131 cut-off events. [2024-06-21 17:51:18,614 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-06-21 17:51:18,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4875 conditions, 2131 events. 1400/2131 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10183 event pairs, 654 based on Foata normal form. 6/2137 useless extension candidates. Maximal degree in co-relation 4863. Up to 2059 conditions per place. [2024-06-21 17:51:18,625 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-21 17:51:18,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 266 flow [2024-06-21 17:51:18,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:51:18,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:51:18,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-21 17:51:18,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-21 17:51:18,627 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 92 transitions. [2024-06-21 17:51:18,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 266 flow [2024-06-21 17:51:18,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:51:18,628 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-21 17:51:18,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-21 17:51:18,629 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-21 17:51:18,629 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-21 17:51:18,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:18,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:18,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:18,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:51:18,630 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:18,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:18,631 INFO L85 PathProgramCache]: Analyzing trace with hash -2095493569, now seen corresponding path program 1 times [2024-06-21 17:51:18,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:18,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639893393] [2024-06-21 17:51:18,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:18,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:20,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:20,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639893393] [2024-06-21 17:51:20,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639893393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:20,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:20,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:51:20,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281268290] [2024-06-21 17:51:20,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:20,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:51:20,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:20,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:51:20,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:51:20,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:51:20,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:20,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:20,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:51:20,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:21,639 INFO L124 PetriNetUnfolderBase]: 1391/2116 cut-off events. [2024-06-21 17:51:21,640 INFO L125 PetriNetUnfolderBase]: For 1120/1120 co-relation queries the response was YES. [2024-06-21 17:51:21,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5383 conditions, 2116 events. 1391/2116 cut-off events. For 1120/1120 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10072 event pairs, 485 based on Foata normal form. 6/2122 useless extension candidates. Maximal degree in co-relation 5369. Up to 2006 conditions per place. [2024-06-21 17:51:21,654 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-21 17:51:21,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 384 flow [2024-06-21 17:51:21,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:51:21,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:51:21,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-21 17:51:21,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-21 17:51:21,660 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 128 transitions. [2024-06-21 17:51:21,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 384 flow [2024-06-21 17:51:21,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 364 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 17:51:21,663 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-21 17:51:21,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-21 17:51:21,665 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-21 17:51:21,665 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-21 17:51:21,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:21,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:21,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:21,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:51:21,666 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:21,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:21,666 INFO L85 PathProgramCache]: Analyzing trace with hash 975656872, now seen corresponding path program 1 times [2024-06-21 17:51:21,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:21,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007179510] [2024-06-21 17:51:21,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:21,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:22,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:22,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007179510] [2024-06-21 17:51:22,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007179510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:22,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:22,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:51:22,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937797426] [2024-06-21 17:51:22,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:22,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:51:22,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:22,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:51:22,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:51:22,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:51:22,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:22,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:22,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:51:22,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:23,722 INFO L124 PetriNetUnfolderBase]: 1179/1896 cut-off events. [2024-06-21 17:51:23,723 INFO L125 PetriNetUnfolderBase]: For 1832/1832 co-relation queries the response was YES. [2024-06-21 17:51:23,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5196 conditions, 1896 events. 1179/1896 cut-off events. For 1832/1832 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9434 event pairs, 473 based on Foata normal form. 2/1898 useless extension candidates. Maximal degree in co-relation 5179. Up to 1739 conditions per place. [2024-06-21 17:51:23,731 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 50 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2024-06-21 17:51:23,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 67 transitions, 385 flow [2024-06-21 17:51:23,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:51:23,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:51:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-21 17:51:23,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 17:51:23,733 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 98 transitions. [2024-06-21 17:51:23,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 67 transitions, 385 flow [2024-06-21 17:51:23,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 358 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:51:23,736 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 230 flow [2024-06-21 17:51:23,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-21 17:51:23,736 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2024-06-21 17:51:23,737 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 230 flow [2024-06-21 17:51:23,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:23,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:23,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:23,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:51:23,737 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:23,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:23,738 INFO L85 PathProgramCache]: Analyzing trace with hash 181695742, now seen corresponding path program 1 times [2024-06-21 17:51:23,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:23,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950095901] [2024-06-21 17:51:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:23,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:25,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:25,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950095901] [2024-06-21 17:51:25,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950095901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:25,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:25,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:51:25,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131379680] [2024-06-21 17:51:25,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:25,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:51:25,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:25,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:51:25,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:51:25,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:51:25,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:25,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:25,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:51:25,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:25,881 INFO L124 PetriNetUnfolderBase]: 1169/1881 cut-off events. [2024-06-21 17:51:25,881 INFO L125 PetriNetUnfolderBase]: For 2845/2847 co-relation queries the response was YES. [2024-06-21 17:51:25,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5676 conditions, 1881 events. 1169/1881 cut-off events. For 2845/2847 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9336 event pairs, 467 based on Foata normal form. 6/1887 useless extension candidates. Maximal degree in co-relation 5656. Up to 1731 conditions per place. [2024-06-21 17:51:25,893 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 49 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-21 17:51:25,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 65 transitions, 384 flow [2024-06-21 17:51:25,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:51:25,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:51:25,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-21 17:51:25,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-21 17:51:25,897 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 230 flow. Second operand 5 states and 96 transitions. [2024-06-21 17:51:25,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 65 transitions, 384 flow [2024-06-21 17:51:25,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 65 transitions, 370 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-21 17:51:25,906 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 244 flow [2024-06-21 17:51:25,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2024-06-21 17:51:25,909 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-21 17:51:25,909 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 244 flow [2024-06-21 17:51:25,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:25,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:25,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:25,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:51:25,910 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:25,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:25,910 INFO L85 PathProgramCache]: Analyzing trace with hash 299361071, now seen corresponding path program 1 times [2024-06-21 17:51:25,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:25,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93880169] [2024-06-21 17:51:25,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:25,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:27,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:27,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93880169] [2024-06-21 17:51:27,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93880169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:27,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:27,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:51:27,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382002192] [2024-06-21 17:51:27,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:27,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:51:27,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:27,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:51:27,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:51:27,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:51:27,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:27,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:27,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:51:27,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:28,633 INFO L124 PetriNetUnfolderBase]: 1389/2123 cut-off events. [2024-06-21 17:51:28,634 INFO L125 PetriNetUnfolderBase]: For 4413/4415 co-relation queries the response was YES. [2024-06-21 17:51:28,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6770 conditions, 2123 events. 1389/2123 cut-off events. For 4413/4415 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10125 event pairs, 523 based on Foata normal form. 4/2127 useless extension candidates. Maximal degree in co-relation 6747. Up to 1956 conditions per place. [2024-06-21 17:51:28,644 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 61 selfloop transitions, 18 changer transitions 0/84 dead transitions. [2024-06-21 17:51:28,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 526 flow [2024-06-21 17:51:28,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:51:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:51:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-21 17:51:28,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 17:51:28,646 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 244 flow. Second operand 6 states and 118 transitions. [2024-06-21 17:51:28,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 526 flow [2024-06-21 17:51:28,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 512 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 17:51:28,650 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 328 flow [2024-06-21 17:51:28,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=328, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2024-06-21 17:51:28,652 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-21 17:51:28,653 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 328 flow [2024-06-21 17:51:28,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:28,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:28,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:28,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:51:28,653 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:28,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:28,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1336498001, now seen corresponding path program 2 times [2024-06-21 17:51:28,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:28,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681843939] [2024-06-21 17:51:28,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:28,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:30,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:30,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681843939] [2024-06-21 17:51:30,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681843939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:30,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:30,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:51:30,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936493314] [2024-06-21 17:51:30,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:30,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:51:30,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:30,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:51:30,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:51:30,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:51:30,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 328 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:30,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:30,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:51:30,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:31,239 INFO L124 PetriNetUnfolderBase]: 1384/2110 cut-off events. [2024-06-21 17:51:31,240 INFO L125 PetriNetUnfolderBase]: For 6481/6483 co-relation queries the response was YES. [2024-06-21 17:51:31,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7418 conditions, 2110 events. 1384/2110 cut-off events. For 6481/6483 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10127 event pairs, 537 based on Foata normal form. 4/2113 useless extension candidates. Maximal degree in co-relation 7392. Up to 1953 conditions per place. [2024-06-21 17:51:31,280 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 55 selfloop transitions, 21 changer transitions 0/81 dead transitions. [2024-06-21 17:51:31,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 582 flow [2024-06-21 17:51:31,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:51:31,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:51:31,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-21 17:51:31,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 17:51:31,283 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 328 flow. Second operand 6 states and 112 transitions. [2024-06-21 17:51:31,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 582 flow [2024-06-21 17:51:31,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 552 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 17:51:31,289 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 376 flow [2024-06-21 17:51:31,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2024-06-21 17:51:31,289 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-21 17:51:31,289 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 376 flow [2024-06-21 17:51:31,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:31,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:31,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:31,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:51:31,290 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:31,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:31,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1656754499, now seen corresponding path program 1 times [2024-06-21 17:51:31,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:31,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113514861] [2024-06-21 17:51:31,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:31,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:32,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:32,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113514861] [2024-06-21 17:51:32,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113514861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:32,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:32,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:51:32,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796361650] [2024-06-21 17:51:32,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:32,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:51:32,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:32,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:51:32,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:51:32,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:51:32,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 376 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:32,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:32,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:51:32,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:33,561 INFO L124 PetriNetUnfolderBase]: 1471/2249 cut-off events. [2024-06-21 17:51:33,561 INFO L125 PetriNetUnfolderBase]: For 8405/8409 co-relation queries the response was YES. [2024-06-21 17:51:33,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8340 conditions, 2249 events. 1471/2249 cut-off events. For 8405/8409 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10805 event pairs, 524 based on Foata normal form. 8/2257 useless extension candidates. Maximal degree in co-relation 8312. Up to 2020 conditions per place. [2024-06-21 17:51:33,570 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 72 selfloop transitions, 34 changer transitions 0/111 dead transitions. [2024-06-21 17:51:33,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 111 transitions, 862 flow [2024-06-21 17:51:33,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:51:33,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:51:33,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 17:51:33,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-21 17:51:33,573 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 376 flow. Second operand 7 states and 141 transitions. [2024-06-21 17:51:33,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 111 transitions, 862 flow [2024-06-21 17:51:33,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 111 transitions, 798 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 17:51:33,579 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 562 flow [2024-06-21 17:51:33,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=562, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-21 17:51:33,580 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2024-06-21 17:51:33,580 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 562 flow [2024-06-21 17:51:33,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:33,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:33,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:33,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:51:33,581 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:33,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:33,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1747229887, now seen corresponding path program 2 times [2024-06-21 17:51:33,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:33,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137960271] [2024-06-21 17:51:33,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:33,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:35,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:35,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137960271] [2024-06-21 17:51:35,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137960271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:35,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:35,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:51:35,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386635327] [2024-06-21 17:51:35,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:35,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:51:35,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:35,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:51:35,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:51:35,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:51:35,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 562 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:35,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:35,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:51:35,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:36,228 INFO L124 PetriNetUnfolderBase]: 1515/2327 cut-off events. [2024-06-21 17:51:36,229 INFO L125 PetriNetUnfolderBase]: For 10885/10891 co-relation queries the response was YES. [2024-06-21 17:51:36,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9059 conditions, 2327 events. 1515/2327 cut-off events. For 10885/10891 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11249 event pairs, 531 based on Foata normal form. 12/2339 useless extension candidates. Maximal degree in co-relation 9027. Up to 2058 conditions per place. [2024-06-21 17:51:36,240 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 64 selfloop transitions, 40 changer transitions 0/109 dead transitions. [2024-06-21 17:51:36,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 950 flow [2024-06-21 17:51:36,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:51:36,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:51:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 17:51:36,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-21 17:51:36,242 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 562 flow. Second operand 6 states and 119 transitions. [2024-06-21 17:51:36,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 950 flow [2024-06-21 17:51:36,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 900 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:51:36,251 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 679 flow [2024-06-21 17:51:36,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=679, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-21 17:51:36,251 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-21 17:51:36,251 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 679 flow [2024-06-21 17:51:36,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:36,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:36,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:36,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:51:36,252 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:36,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:36,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1518225757, now seen corresponding path program 3 times [2024-06-21 17:51:36,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:36,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018044131] [2024-06-21 17:51:36,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:36,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:37,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:37,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018044131] [2024-06-21 17:51:37,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018044131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:37,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:37,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:51:37,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540931094] [2024-06-21 17:51:37,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:37,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:51:37,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:37,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:51:37,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:51:37,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:51:37,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 679 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:37,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:37,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:51:37,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:38,794 INFO L124 PetriNetUnfolderBase]: 1499/2297 cut-off events. [2024-06-21 17:51:38,795 INFO L125 PetriNetUnfolderBase]: For 12907/12919 co-relation queries the response was YES. [2024-06-21 17:51:38,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9164 conditions, 2297 events. 1499/2297 cut-off events. For 12907/12919 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11062 event pairs, 536 based on Foata normal form. 18/2314 useless extension candidates. Maximal degree in co-relation 9131. Up to 2045 conditions per place. [2024-06-21 17:51:38,808 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 39 changer transitions 0/103 dead transitions. [2024-06-21 17:51:38,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 103 transitions, 941 flow [2024-06-21 17:51:38,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:51:38,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:51:38,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 17:51:38,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 17:51:38,810 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 679 flow. Second operand 6 states and 111 transitions. [2024-06-21 17:51:38,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 103 transitions, 941 flow [2024-06-21 17:51:38,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 103 transitions, 866 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 17:51:38,819 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 693 flow [2024-06-21 17:51:38,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=693, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-06-21 17:51:38,820 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-21 17:51:38,820 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 693 flow [2024-06-21 17:51:38,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:38,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:38,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:38,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:51:38,821 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:38,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:38,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1517956367, now seen corresponding path program 1 times [2024-06-21 17:51:38,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:38,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676187851] [2024-06-21 17:51:38,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:38,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:41,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:41,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676187851] [2024-06-21 17:51:41,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676187851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:41,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:41,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:51:41,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171384427] [2024-06-21 17:51:41,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:41,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:51:41,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:41,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:51:41,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:51:41,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:51:41,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 693 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:41,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:41,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:51:41,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:42,220 INFO L124 PetriNetUnfolderBase]: 1284/2073 cut-off events. [2024-06-21 17:51:42,220 INFO L125 PetriNetUnfolderBase]: For 11226/11228 co-relation queries the response was YES. [2024-06-21 17:51:42,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8111 conditions, 2073 events. 1284/2073 cut-off events. For 11226/11228 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 10343 event pairs, 435 based on Foata normal form. 6/2079 useless extension candidates. Maximal degree in co-relation 8078. Up to 1878 conditions per place. [2024-06-21 17:51:42,230 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 86 selfloop transitions, 12 changer transitions 0/104 dead transitions. [2024-06-21 17:51:42,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 104 transitions, 965 flow [2024-06-21 17:51:42,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:51:42,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:51:42,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 17:51:42,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437984496124031 [2024-06-21 17:51:42,232 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 693 flow. Second operand 6 states and 113 transitions. [2024-06-21 17:51:42,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 104 transitions, 965 flow [2024-06-21 17:51:42,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 104 transitions, 796 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 17:51:42,241 INFO L231 Difference]: Finished difference. Result has 76 places, 83 transitions, 577 flow [2024-06-21 17:51:42,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=577, PETRI_PLACES=76, PETRI_TRANSITIONS=83} [2024-06-21 17:51:42,242 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-21 17:51:42,242 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 83 transitions, 577 flow [2024-06-21 17:51:42,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:42,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:42,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:42,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:51:42,243 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:42,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:42,243 INFO L85 PathProgramCache]: Analyzing trace with hash 131315518, now seen corresponding path program 1 times [2024-06-21 17:51:42,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:42,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671637529] [2024-06-21 17:51:42,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:42,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:44,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:44,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671637529] [2024-06-21 17:51:44,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671637529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:44,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:44,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:51:44,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303892462] [2024-06-21 17:51:44,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:44,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:51:44,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:44,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:51:44,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:51:44,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:51:44,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 83 transitions, 577 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 17:51:44,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:44,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:51:44,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:45,735 INFO L124 PetriNetUnfolderBase]: 1540/2366 cut-off events. [2024-06-21 17:51:45,735 INFO L125 PetriNetUnfolderBase]: For 13307/13307 co-relation queries the response was YES. [2024-06-21 17:51:45,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9441 conditions, 2366 events. 1540/2366 cut-off events. For 13307/13307 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11441 event pairs, 521 based on Foata normal form. 2/2368 useless extension candidates. Maximal degree in co-relation 9409. Up to 2209 conditions per place. [2024-06-21 17:51:45,747 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 105 selfloop transitions, 19 changer transitions 0/129 dead transitions. [2024-06-21 17:51:45,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 129 transitions, 1029 flow [2024-06-21 17:51:45,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:51:45,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:51:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 17:51:45,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 17:51:45,749 INFO L175 Difference]: Start difference. First operand has 76 places, 83 transitions, 577 flow. Second operand 8 states and 149 transitions. [2024-06-21 17:51:45,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 129 transitions, 1029 flow [2024-06-21 17:51:45,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 129 transitions, 994 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 17:51:45,759 INFO L231 Difference]: Finished difference. Result has 81 places, 89 transitions, 650 flow [2024-06-21 17:51:45,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=650, PETRI_PLACES=81, PETRI_TRANSITIONS=89} [2024-06-21 17:51:45,760 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-21 17:51:45,760 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 89 transitions, 650 flow [2024-06-21 17:51:45,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 17:51:45,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:45,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:45,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:51:45,761 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:45,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:45,761 INFO L85 PathProgramCache]: Analyzing trace with hash 131435488, now seen corresponding path program 2 times [2024-06-21 17:51:45,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:45,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182085518] [2024-06-21 17:51:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:45,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:47,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:47,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:47,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182085518] [2024-06-21 17:51:47,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182085518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:47,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:47,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:51:47,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505770865] [2024-06-21 17:51:47,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:47,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:51:47,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:47,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:51:47,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:51:47,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:51:47,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 89 transitions, 650 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 17:51:47,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:47,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:51:47,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:49,116 INFO L124 PetriNetUnfolderBase]: 1553/2396 cut-off events. [2024-06-21 17:51:49,117 INFO L125 PetriNetUnfolderBase]: For 16561/16565 co-relation queries the response was YES. [2024-06-21 17:51:49,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10168 conditions, 2396 events. 1553/2396 cut-off events. For 16561/16565 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11714 event pairs, 479 based on Foata normal form. 6/2402 useless extension candidates. Maximal degree in co-relation 10134. Up to 1935 conditions per place. [2024-06-21 17:51:49,128 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 79 selfloop transitions, 45 changer transitions 0/129 dead transitions. [2024-06-21 17:51:49,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 129 transitions, 1108 flow [2024-06-21 17:51:49,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:51:49,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:51:49,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 17:51:49,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-21 17:51:49,130 INFO L175 Difference]: Start difference. First operand has 81 places, 89 transitions, 650 flow. Second operand 7 states and 136 transitions. [2024-06-21 17:51:49,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 129 transitions, 1108 flow [2024-06-21 17:51:49,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 129 transitions, 1049 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 17:51:49,143 INFO L231 Difference]: Finished difference. Result has 83 places, 95 transitions, 791 flow [2024-06-21 17:51:49,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=791, PETRI_PLACES=83, PETRI_TRANSITIONS=95} [2024-06-21 17:51:49,144 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-21 17:51:49,144 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 95 transitions, 791 flow [2024-06-21 17:51:49,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 17:51:49,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:49,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:49,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:51:49,145 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:49,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:49,145 INFO L85 PathProgramCache]: Analyzing trace with hash 982869238, now seen corresponding path program 3 times [2024-06-21 17:51:49,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:49,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438031569] [2024-06-21 17:51:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:49,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:49,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:51,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:51,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438031569] [2024-06-21 17:51:51,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438031569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:51,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:51,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:51:51,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377341151] [2024-06-21 17:51:51,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:51,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:51:51,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:51,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:51:51,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:51:51,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:51:51,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 95 transitions, 791 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 17:51:51,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:51,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:51:51,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:52,552 INFO L124 PetriNetUnfolderBase]: 1548/2376 cut-off events. [2024-06-21 17:51:52,552 INFO L125 PetriNetUnfolderBase]: For 20211/20215 co-relation queries the response was YES. [2024-06-21 17:51:52,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10941 conditions, 2376 events. 1548/2376 cut-off events. For 20211/20215 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11596 event pairs, 536 based on Foata normal form. 6/2380 useless extension candidates. Maximal degree in co-relation 10906. Up to 1932 conditions per place. [2024-06-21 17:51:52,563 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 71 selfloop transitions, 50 changer transitions 0/126 dead transitions. [2024-06-21 17:51:52,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 126 transitions, 1203 flow [2024-06-21 17:51:52,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:51:52,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:51:52,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 17:51:52,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-21 17:51:52,565 INFO L175 Difference]: Start difference. First operand has 83 places, 95 transitions, 791 flow. Second operand 7 states and 130 transitions. [2024-06-21 17:51:52,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 126 transitions, 1203 flow [2024-06-21 17:51:52,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 126 transitions, 1142 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 17:51:52,579 INFO L231 Difference]: Finished difference. Result has 87 places, 98 transitions, 881 flow [2024-06-21 17:51:52,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=881, PETRI_PLACES=87, PETRI_TRANSITIONS=98} [2024-06-21 17:51:52,579 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-21 17:51:52,579 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 98 transitions, 881 flow [2024-06-21 17:51:52,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 17:51:52,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:52,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:52,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:51:52,580 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:52,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:52,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1778545972, now seen corresponding path program 1 times [2024-06-21 17:51:52,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:52,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368592668] [2024-06-21 17:51:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:52,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:54,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:54,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368592668] [2024-06-21 17:51:54,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368592668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:54,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:54,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:51:54,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538521018] [2024-06-21 17:51:54,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:54,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:51:54,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:54,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:51:54,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:51:54,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:51:54,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 98 transitions, 881 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:54,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:54,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:51:54,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:55,008 INFO L124 PetriNetUnfolderBase]: 1335/2164 cut-off events. [2024-06-21 17:51:55,008 INFO L125 PetriNetUnfolderBase]: For 18398/18398 co-relation queries the response was YES. [2024-06-21 17:51:55,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9856 conditions, 2164 events. 1335/2164 cut-off events. For 18398/18398 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 10977 event pairs, 443 based on Foata normal form. 2/2166 useless extension candidates. Maximal degree in co-relation 9819. Up to 2002 conditions per place. [2024-06-21 17:51:55,018 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 98 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2024-06-21 17:51:55,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 112 transitions, 1141 flow [2024-06-21 17:51:55,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:51:55,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:51:55,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-21 17:51:55,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 17:51:55,020 INFO L175 Difference]: Start difference. First operand has 87 places, 98 transitions, 881 flow. Second operand 5 states and 90 transitions. [2024-06-21 17:51:55,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 112 transitions, 1141 flow [2024-06-21 17:51:55,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 112 transitions, 1055 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 17:51:55,031 INFO L231 Difference]: Finished difference. Result has 88 places, 101 transitions, 841 flow [2024-06-21 17:51:55,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=841, PETRI_PLACES=88, PETRI_TRANSITIONS=101} [2024-06-21 17:51:55,031 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-21 17:51:55,032 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 101 transitions, 841 flow [2024-06-21 17:51:55,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:55,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:55,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:55,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:51:55,032 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:55,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:55,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1767455638, now seen corresponding path program 1 times [2024-06-21 17:51:55,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:55,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246277557] [2024-06-21 17:51:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:55,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:57,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:57,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:57,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246277557] [2024-06-21 17:51:57,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246277557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:57,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:57,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:51:57,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752665242] [2024-06-21 17:51:57,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:57,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:51:57,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:57,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:51:57,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:51:57,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:51:57,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 101 transitions, 841 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:57,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:57,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:51:57,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:58,555 INFO L124 PetriNetUnfolderBase]: 1529/2364 cut-off events. [2024-06-21 17:51:58,556 INFO L125 PetriNetUnfolderBase]: For 23366/23366 co-relation queries the response was YES. [2024-06-21 17:51:58,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11076 conditions, 2364 events. 1529/2364 cut-off events. For 23366/23366 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11586 event pairs, 520 based on Foata normal form. 4/2368 useless extension candidates. Maximal degree in co-relation 11037. Up to 2201 conditions per place. [2024-06-21 17:51:58,568 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 115 selfloop transitions, 19 changer transitions 0/139 dead transitions. [2024-06-21 17:51:58,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 139 transitions, 1219 flow [2024-06-21 17:51:58,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:51:58,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:51:58,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 17:51:58,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-21 17:51:58,570 INFO L175 Difference]: Start difference. First operand has 88 places, 101 transitions, 841 flow. Second operand 8 states and 147 transitions. [2024-06-21 17:51:58,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 139 transitions, 1219 flow [2024-06-21 17:51:58,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 139 transitions, 1185 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 17:51:58,583 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 853 flow [2024-06-21 17:51:58,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=853, PETRI_PLACES=93, PETRI_TRANSITIONS=101} [2024-06-21 17:51:58,584 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-21 17:51:58,584 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 853 flow [2024-06-21 17:51:58,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:58,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:58,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:58,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:51:58,585 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:58,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:58,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1915272628, now seen corresponding path program 2 times [2024-06-21 17:51:58,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:58,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083559677] [2024-06-21 17:51:58,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:58,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:00,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:00,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083559677] [2024-06-21 17:52:00,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083559677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:00,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:00,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:52:00,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524931506] [2024-06-21 17:52:00,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:00,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:52:00,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:00,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:52:00,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:52:00,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:52:00,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 853 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:00,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:00,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:52:00,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:02,162 INFO L124 PetriNetUnfolderBase]: 1591/2476 cut-off events. [2024-06-21 17:52:02,162 INFO L125 PetriNetUnfolderBase]: For 26930/26938 co-relation queries the response was YES. [2024-06-21 17:52:02,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11810 conditions, 2476 events. 1591/2476 cut-off events. For 26930/26938 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 12314 event pairs, 472 based on Foata normal form. 12/2488 useless extension candidates. Maximal degree in co-relation 11770. Up to 1964 conditions per place. [2024-06-21 17:52:02,175 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 84 selfloop transitions, 55 changer transitions 0/144 dead transitions. [2024-06-21 17:52:02,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 144 transitions, 1425 flow [2024-06-21 17:52:02,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:52:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:52:02,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 17:52:02,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 17:52:02,177 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 853 flow. Second operand 7 states and 140 transitions. [2024-06-21 17:52:02,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 144 transitions, 1425 flow [2024-06-21 17:52:02,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 144 transitions, 1387 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:52:02,191 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 1011 flow [2024-06-21 17:52:02,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1011, PETRI_PLACES=93, PETRI_TRANSITIONS=107} [2024-06-21 17:52:02,191 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-21 17:52:02,192 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 1011 flow [2024-06-21 17:52:02,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:02,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:02,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:02,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:52:02,192 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:02,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:02,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1771174708, now seen corresponding path program 3 times [2024-06-21 17:52:02,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:02,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229981084] [2024-06-21 17:52:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:02,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:04,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:04,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229981084] [2024-06-21 17:52:04,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229981084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:04,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:04,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:04,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615877112] [2024-06-21 17:52:04,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:04,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:04,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:04,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:04,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:04,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:52:04,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 107 transitions, 1011 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:04,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:04,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:52:04,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:05,926 INFO L124 PetriNetUnfolderBase]: 1617/2509 cut-off events. [2024-06-21 17:52:05,926 INFO L125 PetriNetUnfolderBase]: For 30952/30956 co-relation queries the response was YES. [2024-06-21 17:52:05,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12425 conditions, 2509 events. 1617/2509 cut-off events. For 30952/30956 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12434 event pairs, 481 based on Foata normal form. 8/2517 useless extension candidates. Maximal degree in co-relation 12384. Up to 1986 conditions per place. [2024-06-21 17:52:05,936 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 88 selfloop transitions, 56 changer transitions 0/149 dead transitions. [2024-06-21 17:52:05,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 149 transitions, 1515 flow [2024-06-21 17:52:05,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:52:05,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:52:05,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 17:52:05,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-21 17:52:05,938 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 1011 flow. Second operand 8 states and 153 transitions. [2024-06-21 17:52:05,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 149 transitions, 1515 flow [2024-06-21 17:52:05,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 149 transitions, 1439 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 17:52:05,957 INFO L231 Difference]: Finished difference. Result has 98 places, 110 transitions, 1099 flow [2024-06-21 17:52:05,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1099, PETRI_PLACES=98, PETRI_TRANSITIONS=110} [2024-06-21 17:52:05,958 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-21 17:52:05,958 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 110 transitions, 1099 flow [2024-06-21 17:52:05,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:05,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:05,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:05,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:52:05,959 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:05,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:05,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1016246666, now seen corresponding path program 1 times [2024-06-21 17:52:05,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:05,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367158008] [2024-06-21 17:52:05,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:05,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:05,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:08,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:08,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367158008] [2024-06-21 17:52:08,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367158008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:08,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:08,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:08,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040967676] [2024-06-21 17:52:08,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:08,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:08,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:08,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:08,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:08,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:52:08,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 110 transitions, 1099 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:08,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:08,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:52:08,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:09,697 INFO L124 PetriNetUnfolderBase]: 1637/2546 cut-off events. [2024-06-21 17:52:09,697 INFO L125 PetriNetUnfolderBase]: For 34889/34897 co-relation queries the response was YES. [2024-06-21 17:52:09,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12760 conditions, 2546 events. 1637/2546 cut-off events. For 34889/34897 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12727 event pairs, 483 based on Foata normal form. 12/2558 useless extension candidates. Maximal degree in co-relation 12718. Up to 2218 conditions per place. [2024-06-21 17:52:09,709 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 97 selfloop transitions, 42 changer transitions 0/144 dead transitions. [2024-06-21 17:52:09,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 144 transitions, 1487 flow [2024-06-21 17:52:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:52:09,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:52:09,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 17:52:09,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 17:52:09,711 INFO L175 Difference]: Start difference. First operand has 98 places, 110 transitions, 1099 flow. Second operand 7 states and 133 transitions. [2024-06-21 17:52:09,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 144 transitions, 1487 flow [2024-06-21 17:52:09,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 144 transitions, 1355 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 17:52:09,732 INFO L231 Difference]: Finished difference. Result has 99 places, 112 transitions, 1084 flow [2024-06-21 17:52:09,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1084, PETRI_PLACES=99, PETRI_TRANSITIONS=112} [2024-06-21 17:52:09,732 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-21 17:52:09,733 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 112 transitions, 1084 flow [2024-06-21 17:52:09,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:09,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:09,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:09,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:52:09,733 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:09,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:09,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1266619444, now seen corresponding path program 4 times [2024-06-21 17:52:09,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:09,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355419847] [2024-06-21 17:52:09,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:09,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:12,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:12,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355419847] [2024-06-21 17:52:12,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355419847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:12,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:12,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:12,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586831422] [2024-06-21 17:52:12,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:12,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:12,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:12,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:12,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:12,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:52:12,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 112 transitions, 1084 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:12,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:12,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:52:12,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:13,511 INFO L124 PetriNetUnfolderBase]: 1627/2508 cut-off events. [2024-06-21 17:52:13,513 INFO L125 PetriNetUnfolderBase]: For 37451/37455 co-relation queries the response was YES. [2024-06-21 17:52:13,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12800 conditions, 2508 events. 1627/2508 cut-off events. For 37451/37455 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12399 event pairs, 562 based on Foata normal form. 8/2514 useless extension candidates. Maximal degree in co-relation 12757. Up to 2010 conditions per place. [2024-06-21 17:52:13,525 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 82 selfloop transitions, 59 changer transitions 0/146 dead transitions. [2024-06-21 17:52:13,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 146 transitions, 1534 flow [2024-06-21 17:52:13,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:52:13,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:52:13,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 17:52:13,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-21 17:52:13,527 INFO L175 Difference]: Start difference. First operand has 99 places, 112 transitions, 1084 flow. Second operand 8 states and 147 transitions. [2024-06-21 17:52:13,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 146 transitions, 1534 flow [2024-06-21 17:52:13,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 146 transitions, 1429 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 17:52:13,547 INFO L231 Difference]: Finished difference. Result has 102 places, 112 transitions, 1105 flow [2024-06-21 17:52:13,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1105, PETRI_PLACES=102, PETRI_TRANSITIONS=112} [2024-06-21 17:52:13,548 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-21 17:52:13,548 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 112 transitions, 1105 flow [2024-06-21 17:52:13,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:13,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:13,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:13,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:52:13,548 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:13,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:13,549 INFO L85 PathProgramCache]: Analyzing trace with hash -199178884, now seen corresponding path program 5 times [2024-06-21 17:52:13,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:13,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541460545] [2024-06-21 17:52:13,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:13,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:15,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:15,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541460545] [2024-06-21 17:52:15,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541460545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:15,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:15,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:52:15,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384730589] [2024-06-21 17:52:15,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:15,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:52:15,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:15,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:52:15,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:52:15,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:52:15,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 112 transitions, 1105 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:15,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:15,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:52:15,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:16,801 INFO L124 PetriNetUnfolderBase]: 1617/2499 cut-off events. [2024-06-21 17:52:16,801 INFO L125 PetriNetUnfolderBase]: For 40100/40108 co-relation queries the response was YES. [2024-06-21 17:52:16,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12889 conditions, 2499 events. 1617/2499 cut-off events. For 40100/40108 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12435 event pairs, 503 based on Foata normal form. 12/2509 useless extension candidates. Maximal degree in co-relation 12845. Up to 2002 conditions per place. [2024-06-21 17:52:16,814 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 79 selfloop transitions, 56 changer transitions 0/140 dead transitions. [2024-06-21 17:52:16,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 140 transitions, 1457 flow [2024-06-21 17:52:16,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:52:16,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:52:16,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 17:52:16,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-21 17:52:16,816 INFO L175 Difference]: Start difference. First operand has 102 places, 112 transitions, 1105 flow. Second operand 7 states and 130 transitions. [2024-06-21 17:52:16,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 140 transitions, 1457 flow [2024-06-21 17:52:16,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 140 transitions, 1294 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 17:52:16,841 INFO L231 Difference]: Finished difference. Result has 101 places, 112 transitions, 1063 flow [2024-06-21 17:52:16,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=942, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1063, PETRI_PLACES=101, PETRI_TRANSITIONS=112} [2024-06-21 17:52:16,841 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-21 17:52:16,841 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 112 transitions, 1063 flow [2024-06-21 17:52:16,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:16,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:16,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:16,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:52:16,842 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:16,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:16,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1532532050, now seen corresponding path program 2 times [2024-06-21 17:52:16,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:16,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188649701] [2024-06-21 17:52:16,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:16,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:19,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:19,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188649701] [2024-06-21 17:52:19,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188649701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:19,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:19,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:19,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465528949] [2024-06-21 17:52:19,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:19,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:19,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:19,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:19,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:19,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:52:19,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 112 transitions, 1063 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:19,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:19,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:52:19,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:20,647 INFO L124 PetriNetUnfolderBase]: 1637/2548 cut-off events. [2024-06-21 17:52:20,647 INFO L125 PetriNetUnfolderBase]: For 42872/42880 co-relation queries the response was YES. [2024-06-21 17:52:20,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13115 conditions, 2548 events. 1637/2548 cut-off events. For 42872/42880 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 12754 event pairs, 494 based on Foata normal form. 12/2559 useless extension candidates. Maximal degree in co-relation 13071. Up to 2228 conditions per place. [2024-06-21 17:52:20,660 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 96 selfloop transitions, 41 changer transitions 0/142 dead transitions. [2024-06-21 17:52:20,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 142 transitions, 1443 flow [2024-06-21 17:52:20,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:52:20,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:52:20,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 17:52:20,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-21 17:52:20,662 INFO L175 Difference]: Start difference. First operand has 101 places, 112 transitions, 1063 flow. Second operand 7 states and 127 transitions. [2024-06-21 17:52:20,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 142 transitions, 1443 flow [2024-06-21 17:52:20,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 142 transitions, 1173 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 17:52:20,691 INFO L231 Difference]: Finished difference. Result has 98 places, 114 transitions, 911 flow [2024-06-21 17:52:20,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=911, PETRI_PLACES=98, PETRI_TRANSITIONS=114} [2024-06-21 17:52:20,692 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-21 17:52:20,692 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 114 transitions, 911 flow [2024-06-21 17:52:20,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:20,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:20,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:20,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:52:20,692 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:20,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:20,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1532858480, now seen corresponding path program 3 times [2024-06-21 17:52:20,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:20,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190051550] [2024-06-21 17:52:20,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:20,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:23,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:23,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190051550] [2024-06-21 17:52:23,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190051550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:23,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:23,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:23,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404716472] [2024-06-21 17:52:23,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:23,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:23,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:23,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:23,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:23,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:52:23,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 114 transitions, 911 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:23,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:23,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:52:23,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:24,214 INFO L124 PetriNetUnfolderBase]: 1629/2542 cut-off events. [2024-06-21 17:52:24,214 INFO L125 PetriNetUnfolderBase]: For 44079/44087 co-relation queries the response was YES. [2024-06-21 17:52:24,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12898 conditions, 2542 events. 1629/2542 cut-off events. For 44079/44087 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12753 event pairs, 466 based on Foata normal form. 12/2553 useless extension candidates. Maximal degree in co-relation 12856. Up to 2134 conditions per place. [2024-06-21 17:52:24,227 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 93 selfloop transitions, 46 changer transitions 0/144 dead transitions. [2024-06-21 17:52:24,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 144 transitions, 1297 flow [2024-06-21 17:52:24,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:52:24,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:52:24,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 17:52:24,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-21 17:52:24,229 INFO L175 Difference]: Start difference. First operand has 98 places, 114 transitions, 911 flow. Second operand 7 states and 127 transitions. [2024-06-21 17:52:24,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 144 transitions, 1297 flow [2024-06-21 17:52:24,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 144 transitions, 1199 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 17:52:24,260 INFO L231 Difference]: Finished difference. Result has 100 places, 116 transitions, 944 flow [2024-06-21 17:52:24,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=944, PETRI_PLACES=100, PETRI_TRANSITIONS=116} [2024-06-21 17:52:24,261 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-21 17:52:24,261 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 116 transitions, 944 flow [2024-06-21 17:52:24,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:24,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:24,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:24,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:52:24,261 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:24,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:24,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1004581711, now seen corresponding path program 1 times [2024-06-21 17:52:24,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:24,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767542928] [2024-06-21 17:52:24,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:24,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:26,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:26,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767542928] [2024-06-21 17:52:26,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767542928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:26,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:26,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:26,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217766679] [2024-06-21 17:52:26,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:26,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:26,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:26,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:26,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:26,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:52:26,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 116 transitions, 944 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:26,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:26,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:52:26,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:28,010 INFO L124 PetriNetUnfolderBase]: 1801/2814 cut-off events. [2024-06-21 17:52:28,010 INFO L125 PetriNetUnfolderBase]: For 56532/56532 co-relation queries the response was YES. [2024-06-21 17:52:28,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14944 conditions, 2814 events. 1801/2814 cut-off events. For 56532/56532 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14479 event pairs, 422 based on Foata normal form. 4/2818 useless extension candidates. Maximal degree in co-relation 14901. Up to 2319 conditions per place. [2024-06-21 17:52:28,026 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 143 selfloop transitions, 23 changer transitions 0/171 dead transitions. [2024-06-21 17:52:28,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 171 transitions, 1582 flow [2024-06-21 17:52:28,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:52:28,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:52:28,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 17:52:28,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 17:52:28,028 INFO L175 Difference]: Start difference. First operand has 100 places, 116 transitions, 944 flow. Second operand 9 states and 171 transitions. [2024-06-21 17:52:28,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 171 transitions, 1582 flow [2024-06-21 17:52:28,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 171 transitions, 1469 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 17:52:28,078 INFO L231 Difference]: Finished difference. Result has 104 places, 119 transitions, 946 flow [2024-06-21 17:52:28,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=946, PETRI_PLACES=104, PETRI_TRANSITIONS=119} [2024-06-21 17:52:28,078 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-21 17:52:28,079 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 119 transitions, 946 flow [2024-06-21 17:52:28,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:28,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:28,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:28,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:52:28,079 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:28,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:28,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1043453267, now seen corresponding path program 2 times [2024-06-21 17:52:28,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:28,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957209698] [2024-06-21 17:52:28,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:28,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:30,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:30,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957209698] [2024-06-21 17:52:30,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957209698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:30,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:30,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:30,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611667235] [2024-06-21 17:52:30,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:30,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:30,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:30,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:30,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:30,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:52:30,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 119 transitions, 946 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:30,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:30,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:52:30,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:31,905 INFO L124 PetriNetUnfolderBase]: 1793/2796 cut-off events. [2024-06-21 17:52:31,905 INFO L125 PetriNetUnfolderBase]: For 59785/59785 co-relation queries the response was YES. [2024-06-21 17:52:31,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14981 conditions, 2796 events. 1793/2796 cut-off events. For 59785/59785 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14389 event pairs, 536 based on Foata normal form. 4/2800 useless extension candidates. Maximal degree in co-relation 14937. Up to 2599 conditions per place. [2024-06-21 17:52:31,918 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 139 selfloop transitions, 21 changer transitions 0/165 dead transitions. [2024-06-21 17:52:31,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 165 transitions, 1432 flow [2024-06-21 17:52:31,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:52:31,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:52:31,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:52:31,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-21 17:52:31,921 INFO L175 Difference]: Start difference. First operand has 104 places, 119 transitions, 946 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:52:31,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 165 transitions, 1432 flow [2024-06-21 17:52:31,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 165 transitions, 1369 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 17:52:31,961 INFO L231 Difference]: Finished difference. Result has 108 places, 121 transitions, 976 flow [2024-06-21 17:52:31,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=976, PETRI_PLACES=108, PETRI_TRANSITIONS=121} [2024-06-21 17:52:31,961 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-21 17:52:31,961 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 121 transitions, 976 flow [2024-06-21 17:52:31,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:31,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:31,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:31,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:52:31,962 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:31,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:31,962 INFO L85 PathProgramCache]: Analyzing trace with hash -928162097, now seen corresponding path program 3 times [2024-06-21 17:52:31,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:31,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869755488] [2024-06-21 17:52:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:31,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:34,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:34,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869755488] [2024-06-21 17:52:34,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869755488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:34,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:34,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:34,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107776342] [2024-06-21 17:52:34,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:34,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:34,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:34,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:34,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:34,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:52:34,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 121 transitions, 976 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:34,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:34,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:52:34,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:35,832 INFO L124 PetriNetUnfolderBase]: 1813/2839 cut-off events. [2024-06-21 17:52:35,832 INFO L125 PetriNetUnfolderBase]: For 65151/65155 co-relation queries the response was YES. [2024-06-21 17:52:35,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15440 conditions, 2839 events. 1813/2839 cut-off events. For 65151/65155 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14645 event pairs, 475 based on Foata normal form. 8/2847 useless extension candidates. Maximal degree in co-relation 15394. Up to 2300 conditions per place. [2024-06-21 17:52:35,847 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 97 selfloop transitions, 58 changer transitions 0/160 dead transitions. [2024-06-21 17:52:35,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 160 transitions, 1434 flow [2024-06-21 17:52:35,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:52:35,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:52:35,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 17:52:35,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 17:52:35,848 INFO L175 Difference]: Start difference. First operand has 108 places, 121 transitions, 976 flow. Second operand 8 states and 150 transitions. [2024-06-21 17:52:35,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 160 transitions, 1434 flow [2024-06-21 17:52:35,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 160 transitions, 1365 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 17:52:35,883 INFO L231 Difference]: Finished difference. Result has 109 places, 123 transitions, 1076 flow [2024-06-21 17:52:35,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1076, PETRI_PLACES=109, PETRI_TRANSITIONS=123} [2024-06-21 17:52:35,884 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-21 17:52:35,884 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 123 transitions, 1076 flow [2024-06-21 17:52:35,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:35,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:35,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:35,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:52:35,884 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:35,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:35,885 INFO L85 PathProgramCache]: Analyzing trace with hash 201984523, now seen corresponding path program 1 times [2024-06-21 17:52:35,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:35,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469062491] [2024-06-21 17:52:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:35,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:37,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:37,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469062491] [2024-06-21 17:52:37,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469062491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:37,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:37,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:52:37,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340106209] [2024-06-21 17:52:37,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:37,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:52:37,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:37,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:52:37,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:52:37,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:52:37,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 123 transitions, 1076 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:37,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:37,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:52:37,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:38,736 INFO L124 PetriNetUnfolderBase]: 1823/2846 cut-off events. [2024-06-21 17:52:38,736 INFO L125 PetriNetUnfolderBase]: For 70047/70047 co-relation queries the response was YES. [2024-06-21 17:52:38,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15908 conditions, 2846 events. 1823/2846 cut-off events. For 70047/70047 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14644 event pairs, 529 based on Foata normal form. 2/2848 useless extension candidates. Maximal degree in co-relation 15861. Up to 2678 conditions per place. [2024-06-21 17:52:38,749 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 131 selfloop transitions, 19 changer transitions 0/155 dead transitions. [2024-06-21 17:52:38,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 155 transitions, 1554 flow [2024-06-21 17:52:38,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:52:38,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:52:38,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 17:52:38,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-21 17:52:38,750 INFO L175 Difference]: Start difference. First operand has 109 places, 123 transitions, 1076 flow. Second operand 6 states and 110 transitions. [2024-06-21 17:52:38,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 155 transitions, 1554 flow [2024-06-21 17:52:38,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 155 transitions, 1403 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 17:52:38,800 INFO L231 Difference]: Finished difference. Result has 110 places, 132 transitions, 1033 flow [2024-06-21 17:52:38,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1033, PETRI_PLACES=110, PETRI_TRANSITIONS=132} [2024-06-21 17:52:38,800 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-21 17:52:38,800 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 132 transitions, 1033 flow [2024-06-21 17:52:38,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:38,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:38,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:38,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:52:38,801 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:38,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:38,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1173694747, now seen corresponding path program 4 times [2024-06-21 17:52:38,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:38,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266230318] [2024-06-21 17:52:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:38,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:41,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:41,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266230318] [2024-06-21 17:52:41,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266230318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:41,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:41,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:41,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949320194] [2024-06-21 17:52:41,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:41,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:41,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:41,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:41,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:41,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:52:41,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 132 transitions, 1033 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:41,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:41,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:52:41,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:42,634 INFO L124 PetriNetUnfolderBase]: 1815/2828 cut-off events. [2024-06-21 17:52:42,634 INFO L125 PetriNetUnfolderBase]: For 73280/73284 co-relation queries the response was YES. [2024-06-21 17:52:42,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15820 conditions, 2828 events. 1815/2828 cut-off events. For 73280/73284 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14559 event pairs, 565 based on Foata normal form. 8/2834 useless extension candidates. Maximal degree in co-relation 15771. Up to 2302 conditions per place. [2024-06-21 17:52:42,649 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 100 selfloop transitions, 61 changer transitions 0/166 dead transitions. [2024-06-21 17:52:42,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 166 transitions, 1495 flow [2024-06-21 17:52:42,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:52:42,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:52:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:52:42,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 17:52:42,650 INFO L175 Difference]: Start difference. First operand has 110 places, 132 transitions, 1033 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:52:42,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 166 transitions, 1495 flow [2024-06-21 17:52:42,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 166 transitions, 1481 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-21 17:52:42,689 INFO L231 Difference]: Finished difference. Result has 117 places, 134 transitions, 1198 flow [2024-06-21 17:52:42,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1019, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1198, PETRI_PLACES=117, PETRI_TRANSITIONS=134} [2024-06-21 17:52:42,689 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-21 17:52:42,690 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 134 transitions, 1198 flow [2024-06-21 17:52:42,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:42,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:42,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:42,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:52:42,690 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:42,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:42,691 INFO L85 PathProgramCache]: Analyzing trace with hash 602243503, now seen corresponding path program 2 times [2024-06-21 17:52:42,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:42,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45074797] [2024-06-21 17:52:42,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:42,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:44,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:44,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45074797] [2024-06-21 17:52:44,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45074797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:44,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:44,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:52:44,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405403280] [2024-06-21 17:52:44,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:44,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:52:44,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:44,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:52:44,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:52:44,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:52:44,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 134 transitions, 1198 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:44,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:44,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:52:44,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:45,703 INFO L124 PetriNetUnfolderBase]: 1809/2814 cut-off events. [2024-06-21 17:52:45,704 INFO L125 PetriNetUnfolderBase]: For 78276/78276 co-relation queries the response was YES. [2024-06-21 17:52:45,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16336 conditions, 2814 events. 1809/2814 cut-off events. For 78276/78276 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14427 event pairs, 541 based on Foata normal form. 2/2814 useless extension candidates. Maximal degree in co-relation 16284. Up to 2661 conditions per place. [2024-06-21 17:52:45,718 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 124 selfloop transitions, 19 changer transitions 0/148 dead transitions. [2024-06-21 17:52:45,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 148 transitions, 1540 flow [2024-06-21 17:52:45,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:52:45,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:52:45,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 17:52:45,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 17:52:45,719 INFO L175 Difference]: Start difference. First operand has 117 places, 134 transitions, 1198 flow. Second operand 6 states and 102 transitions. [2024-06-21 17:52:45,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 148 transitions, 1540 flow [2024-06-21 17:52:45,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 148 transitions, 1373 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 17:52:45,757 INFO L231 Difference]: Finished difference. Result has 117 places, 134 transitions, 1075 flow [2024-06-21 17:52:45,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1075, PETRI_PLACES=117, PETRI_TRANSITIONS=134} [2024-06-21 17:52:45,758 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-21 17:52:45,758 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 134 transitions, 1075 flow [2024-06-21 17:52:45,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:45,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:45,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:45,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:52:45,759 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:45,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:45,759 INFO L85 PathProgramCache]: Analyzing trace with hash 208657707, now seen corresponding path program 1 times [2024-06-21 17:52:45,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:45,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662415812] [2024-06-21 17:52:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:45,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:47,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:47,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662415812] [2024-06-21 17:52:47,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662415812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:47,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:47,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:52:47,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020375648] [2024-06-21 17:52:47,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:47,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:52:47,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:47,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:52:47,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:52:47,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:52:47,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 134 transitions, 1075 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:47,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:47,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:52:47,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:48,581 INFO L124 PetriNetUnfolderBase]: 1691/2724 cut-off events. [2024-06-21 17:52:48,581 INFO L125 PetriNetUnfolderBase]: For 70877/70881 co-relation queries the response was YES. [2024-06-21 17:52:48,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15029 conditions, 2724 events. 1691/2724 cut-off events. For 70877/70881 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14538 event pairs, 448 based on Foata normal form. 6/2720 useless extension candidates. Maximal degree in co-relation 14976. Up to 2444 conditions per place. [2024-06-21 17:52:48,594 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 132 selfloop transitions, 23 changer transitions 0/164 dead transitions. [2024-06-21 17:52:48,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 164 transitions, 1643 flow [2024-06-21 17:52:48,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:52:48,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:52:48,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-21 17:52:48,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2024-06-21 17:52:48,595 INFO L175 Difference]: Start difference. First operand has 117 places, 134 transitions, 1075 flow. Second operand 6 states and 115 transitions. [2024-06-21 17:52:48,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 164 transitions, 1643 flow [2024-06-21 17:52:48,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 164 transitions, 1602 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 17:52:48,634 INFO L231 Difference]: Finished difference. Result has 120 places, 143 transitions, 1202 flow [2024-06-21 17:52:48,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1202, PETRI_PLACES=120, PETRI_TRANSITIONS=143} [2024-06-21 17:52:48,635 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-21 17:52:48,635 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 143 transitions, 1202 flow [2024-06-21 17:52:48,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:48,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:48,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:48,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:52:48,635 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:48,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:48,636 INFO L85 PathProgramCache]: Analyzing trace with hash 615656397, now seen corresponding path program 2 times [2024-06-21 17:52:48,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:48,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324033230] [2024-06-21 17:52:48,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:48,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:50,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:50,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324033230] [2024-06-21 17:52:50,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324033230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:50,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:50,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:52:50,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628221747] [2024-06-21 17:52:50,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:50,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:52:50,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:50,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:52:50,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:52:50,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:52:50,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 143 transitions, 1202 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:50,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:50,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:52:50,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:51,344 INFO L124 PetriNetUnfolderBase]: 1715/2754 cut-off events. [2024-06-21 17:52:51,344 INFO L125 PetriNetUnfolderBase]: For 76277/76277 co-relation queries the response was YES. [2024-06-21 17:52:51,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15760 conditions, 2754 events. 1715/2754 cut-off events. For 76277/76277 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14782 event pairs, 459 based on Foata normal form. 3/2752 useless extension candidates. Maximal degree in co-relation 15705. Up to 2534 conditions per place. [2024-06-21 17:52:51,361 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 138 selfloop transitions, 16 changer transitions 0/163 dead transitions. [2024-06-21 17:52:51,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 163 transitions, 1639 flow [2024-06-21 17:52:51,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:52:51,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:52:51,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 17:52:51,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-21 17:52:51,363 INFO L175 Difference]: Start difference. First operand has 120 places, 143 transitions, 1202 flow. Second operand 7 states and 120 transitions. [2024-06-21 17:52:51,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 163 transitions, 1639 flow [2024-06-21 17:52:51,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 163 transitions, 1575 flow, removed 31 selfloop flow, removed 1 redundant places. [2024-06-21 17:52:51,422 INFO L231 Difference]: Finished difference. Result has 127 places, 146 transitions, 1216 flow [2024-06-21 17:52:51,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1216, PETRI_PLACES=127, PETRI_TRANSITIONS=146} [2024-06-21 17:52:51,422 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-21 17:52:51,422 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 146 transitions, 1216 flow [2024-06-21 17:52:51,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:51,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:51,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:51,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:52:51,423 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:51,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:51,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1924123063, now seen corresponding path program 1 times [2024-06-21 17:52:51,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:51,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580141112] [2024-06-21 17:52:51,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:51,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:53,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:53,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:53,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580141112] [2024-06-21 17:52:53,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580141112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:53,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:53,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:53,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553889175] [2024-06-21 17:52:53,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:53,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:53,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:53,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:53,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:53,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:52:53,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 146 transitions, 1216 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:53,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:53,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:52:53,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:55,277 INFO L124 PetriNetUnfolderBase]: 1931/3017 cut-off events. [2024-06-21 17:52:55,277 INFO L125 PetriNetUnfolderBase]: For 100598/100598 co-relation queries the response was YES. [2024-06-21 17:52:55,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17657 conditions, 3017 events. 1931/3017 cut-off events. For 100598/100598 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15701 event pairs, 418 based on Foata normal form. 16/3033 useless extension candidates. Maximal degree in co-relation 17598. Up to 2434 conditions per place. [2024-06-21 17:52:55,296 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 171 selfloop transitions, 25 changer transitions 0/201 dead transitions. [2024-06-21 17:52:55,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 201 transitions, 1900 flow [2024-06-21 17:52:55,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:52:55,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:52:55,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 17:52:55,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 17:52:55,297 INFO L175 Difference]: Start difference. First operand has 127 places, 146 transitions, 1216 flow. Second operand 9 states and 173 transitions. [2024-06-21 17:52:55,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 201 transitions, 1900 flow [2024-06-21 17:52:55,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 201 transitions, 1860 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:52:55,366 INFO L231 Difference]: Finished difference. Result has 131 places, 147 transitions, 1255 flow [2024-06-21 17:52:55,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1255, PETRI_PLACES=131, PETRI_TRANSITIONS=147} [2024-06-21 17:52:55,367 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-21 17:52:55,367 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 147 transitions, 1255 flow [2024-06-21 17:52:55,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:55,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:55,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:55,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:52:55,367 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:55,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:55,367 INFO L85 PathProgramCache]: Analyzing trace with hash -2081321895, now seen corresponding path program 2 times [2024-06-21 17:52:55,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:55,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369404777] [2024-06-21 17:52:55,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:55,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:57,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:57,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369404777] [2024-06-21 17:52:57,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369404777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:57,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:57,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:57,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788738244] [2024-06-21 17:52:57,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:57,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:57,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:57,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:57,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:57,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:52:57,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 147 transitions, 1255 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:57,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:57,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:52:57,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:59,231 INFO L124 PetriNetUnfolderBase]: 1895/2961 cut-off events. [2024-06-21 17:52:59,231 INFO L125 PetriNetUnfolderBase]: For 98838/98838 co-relation queries the response was YES. [2024-06-21 17:52:59,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17114 conditions, 2961 events. 1895/2961 cut-off events. For 98838/98838 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15322 event pairs, 526 based on Foata normal form. 20/2981 useless extension candidates. Maximal degree in co-relation 17054. Up to 2636 conditions per place. [2024-06-21 17:52:59,247 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 170 selfloop transitions, 20 changer transitions 0/195 dead transitions. [2024-06-21 17:52:59,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 195 transitions, 1779 flow [2024-06-21 17:52:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:52:59,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:52:59,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 17:52:59,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-21 17:52:59,249 INFO L175 Difference]: Start difference. First operand has 131 places, 147 transitions, 1255 flow. Second operand 9 states and 166 transitions. [2024-06-21 17:52:59,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 195 transitions, 1779 flow [2024-06-21 17:52:59,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 195 transitions, 1714 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 17:52:59,325 INFO L231 Difference]: Finished difference. Result has 134 places, 147 transitions, 1237 flow [2024-06-21 17:52:59,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1237, PETRI_PLACES=134, PETRI_TRANSITIONS=147} [2024-06-21 17:52:59,325 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-21 17:52:59,325 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 147 transitions, 1237 flow [2024-06-21 17:52:59,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:59,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:59,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:59,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:52:59,326 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:59,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:59,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1963923981, now seen corresponding path program 3 times [2024-06-21 17:52:59,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:59,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694129282] [2024-06-21 17:52:59,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:59,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:01,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:01,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694129282] [2024-06-21 17:53:01,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694129282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:01,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:01,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:53:01,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139002717] [2024-06-21 17:53:01,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:01,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:53:01,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:01,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:53:01,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:53:01,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:53:01,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 147 transitions, 1237 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:01,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:01,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:53:01,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:03,196 INFO L124 PetriNetUnfolderBase]: 1983/3137 cut-off events. [2024-06-21 17:53:03,196 INFO L125 PetriNetUnfolderBase]: For 106146/106154 co-relation queries the response was YES. [2024-06-21 17:53:03,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17745 conditions, 3137 events. 1983/3137 cut-off events. For 106146/106154 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 16637 event pairs, 472 based on Foata normal form. 28/3165 useless extension candidates. Maximal degree in co-relation 17684. Up to 2453 conditions per place. [2024-06-21 17:53:03,215 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 127 selfloop transitions, 59 changer transitions 0/191 dead transitions. [2024-06-21 17:53:03,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 191 transitions, 1765 flow [2024-06-21 17:53:03,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:53:03,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:53:03,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 17:53:03,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 17:53:03,217 INFO L175 Difference]: Start difference. First operand has 134 places, 147 transitions, 1237 flow. Second operand 8 states and 155 transitions. [2024-06-21 17:53:03,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 191 transitions, 1765 flow [2024-06-21 17:53:03,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 191 transitions, 1704 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 17:53:03,274 INFO L231 Difference]: Finished difference. Result has 133 places, 148 transitions, 1331 flow [2024-06-21 17:53:03,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1331, PETRI_PLACES=133, PETRI_TRANSITIONS=148} [2024-06-21 17:53:03,275 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-21 17:53:03,275 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 148 transitions, 1331 flow [2024-06-21 17:53:03,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:03,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:03,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:03,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:53:03,275 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:03,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:03,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2131741525, now seen corresponding path program 4 times [2024-06-21 17:53:03,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:03,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654491028] [2024-06-21 17:53:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:03,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:05,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:05,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654491028] [2024-06-21 17:53:05,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654491028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:05,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:05,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:53:05,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819865005] [2024-06-21 17:53:05,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:05,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:53:05,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:06,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:53:06,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:53:06,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:53:06,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 148 transitions, 1331 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:06,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:06,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:53:06,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:07,784 INFO L124 PetriNetUnfolderBase]: 2071/3280 cut-off events. [2024-06-21 17:53:07,784 INFO L125 PetriNetUnfolderBase]: For 114918/114922 co-relation queries the response was YES. [2024-06-21 17:53:07,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18735 conditions, 3280 events. 2071/3280 cut-off events. For 114918/114922 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17686 event pairs, 509 based on Foata normal form. 24/3304 useless extension candidates. Maximal degree in co-relation 18673. Up to 2601 conditions per place. [2024-06-21 17:53:07,805 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 134 selfloop transitions, 57 changer transitions 0/196 dead transitions. [2024-06-21 17:53:07,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 196 transitions, 1883 flow [2024-06-21 17:53:07,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:53:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:53:07,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 17:53:07,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-21 17:53:07,807 INFO L175 Difference]: Start difference. First operand has 133 places, 148 transitions, 1331 flow. Second operand 9 states and 170 transitions. [2024-06-21 17:53:07,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 196 transitions, 1883 flow [2024-06-21 17:53:07,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 196 transitions, 1746 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 17:53:07,881 INFO L231 Difference]: Finished difference. Result has 136 places, 149 transitions, 1347 flow [2024-06-21 17:53:07,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1194, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1347, PETRI_PLACES=136, PETRI_TRANSITIONS=149} [2024-06-21 17:53:07,881 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-21 17:53:07,881 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 149 transitions, 1347 flow [2024-06-21 17:53:07,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:07,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:07,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:07,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:53:07,882 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:07,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:07,882 INFO L85 PathProgramCache]: Analyzing trace with hash 2131593655, now seen corresponding path program 5 times [2024-06-21 17:53:07,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:07,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617139581] [2024-06-21 17:53:07,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:07,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:10,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:10,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617139581] [2024-06-21 17:53:10,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617139581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:10,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:10,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:53:10,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381803875] [2024-06-21 17:53:10,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:10,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:53:10,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:10,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:53:10,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:53:10,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:53:10,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 149 transitions, 1347 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:10,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:10,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:53:10,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:12,387 INFO L124 PetriNetUnfolderBase]: 2139/3396 cut-off events. [2024-06-21 17:53:12,387 INFO L125 PetriNetUnfolderBase]: For 119563/119567 co-relation queries the response was YES. [2024-06-21 17:53:12,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19254 conditions, 3396 events. 2139/3396 cut-off events. For 119563/119567 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18499 event pairs, 493 based on Foata normal form. 20/3416 useless extension candidates. Maximal degree in co-relation 19191. Up to 2583 conditions per place. [2024-06-21 17:53:12,406 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 141 selfloop transitions, 60 changer transitions 0/206 dead transitions. [2024-06-21 17:53:12,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 206 transitions, 1947 flow [2024-06-21 17:53:12,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:53:12,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:53:12,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 17:53:12,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-21 17:53:12,408 INFO L175 Difference]: Start difference. First operand has 136 places, 149 transitions, 1347 flow. Second operand 10 states and 189 transitions. [2024-06-21 17:53:12,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 206 transitions, 1947 flow [2024-06-21 17:53:12,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 206 transitions, 1812 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 17:53:12,477 INFO L231 Difference]: Finished difference. Result has 139 places, 150 transitions, 1372 flow [2024-06-21 17:53:12,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1372, PETRI_PLACES=139, PETRI_TRANSITIONS=150} [2024-06-21 17:53:12,477 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-21 17:53:12,477 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 150 transitions, 1372 flow [2024-06-21 17:53:12,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:12,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:12,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:12,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:53:12,478 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:12,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:12,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1078936279, now seen corresponding path program 1 times [2024-06-21 17:53:12,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:12,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217611014] [2024-06-21 17:53:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:12,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:15,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:15,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217611014] [2024-06-21 17:53:15,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217611014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:15,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:15,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:53:15,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778647185] [2024-06-21 17:53:15,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:15,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:53:15,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:15,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:53:15,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:53:15,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:53:15,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 150 transitions, 1372 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:15,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:15,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:53:15,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:17,028 INFO L124 PetriNetUnfolderBase]: 2311/3683 cut-off events. [2024-06-21 17:53:17,028 INFO L125 PetriNetUnfolderBase]: For 137616/137624 co-relation queries the response was YES. [2024-06-21 17:53:17,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21340 conditions, 3683 events. 2311/3683 cut-off events. For 137616/137624 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20644 event pairs, 534 based on Foata normal form. 20/3703 useless extension candidates. Maximal degree in co-relation 21276. Up to 2405 conditions per place. [2024-06-21 17:53:17,051 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 132 selfloop transitions, 62 changer transitions 0/199 dead transitions. [2024-06-21 17:53:17,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 199 transitions, 2100 flow [2024-06-21 17:53:17,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:53:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:53:17,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 17:53:17,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-21 17:53:17,052 INFO L175 Difference]: Start difference. First operand has 139 places, 150 transitions, 1372 flow. Second operand 8 states and 158 transitions. [2024-06-21 17:53:17,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 199 transitions, 2100 flow [2024-06-21 17:53:17,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 199 transitions, 1952 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 17:53:17,149 INFO L231 Difference]: Finished difference. Result has 139 places, 152 transitions, 1424 flow [2024-06-21 17:53:17,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1424, PETRI_PLACES=139, PETRI_TRANSITIONS=152} [2024-06-21 17:53:17,150 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-21 17:53:17,150 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 152 transitions, 1424 flow [2024-06-21 17:53:17,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:17,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:17,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:17,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:53:17,150 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:17,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:17,151 INFO L85 PathProgramCache]: Analyzing trace with hash -384504645, now seen corresponding path program 1 times [2024-06-21 17:53:17,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:17,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047786176] [2024-06-21 17:53:17,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:17,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:19,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:19,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047786176] [2024-06-21 17:53:19,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047786176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:19,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:19,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:53:19,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011276039] [2024-06-21 17:53:19,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:19,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:53:19,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:19,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:53:19,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:53:19,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:53:19,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 152 transitions, 1424 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2024-06-21 17:53:19,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:19,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:53:19,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:20,805 INFO L124 PetriNetUnfolderBase]: 2331/3709 cut-off events. [2024-06-21 17:53:20,806 INFO L125 PetriNetUnfolderBase]: For 139081/139081 co-relation queries the response was YES. [2024-06-21 17:53:20,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21525 conditions, 3709 events. 2331/3709 cut-off events. For 139081/139081 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 20812 event pairs, 666 based on Foata normal form. 4/3713 useless extension candidates. Maximal degree in co-relation 21460. Up to 3474 conditions per place. [2024-06-21 17:53:20,830 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 155 selfloop transitions, 26 changer transitions 0/186 dead transitions. [2024-06-21 17:53:20,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 186 transitions, 2010 flow [2024-06-21 17:53:20,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:53:20,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:53:20,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 17:53:20,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-21 17:53:20,832 INFO L175 Difference]: Start difference. First operand has 139 places, 152 transitions, 1424 flow. Second operand 7 states and 128 transitions. [2024-06-21 17:53:20,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 186 transitions, 2010 flow [2024-06-21 17:53:20,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 186 transitions, 1912 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 17:53:20,911 INFO L231 Difference]: Finished difference. Result has 142 places, 158 transitions, 1442 flow [2024-06-21 17:53:20,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1442, PETRI_PLACES=142, PETRI_TRANSITIONS=158} [2024-06-21 17:53:20,912 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-21 17:53:20,912 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 158 transitions, 1442 flow [2024-06-21 17:53:20,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2024-06-21 17:53:20,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:20,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:20,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:53:20,912 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:20,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:20,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1794382455, now seen corresponding path program 6 times [2024-06-21 17:53:20,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:20,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065620556] [2024-06-21 17:53:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:20,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:23,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:23,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065620556] [2024-06-21 17:53:23,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065620556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:23,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:23,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:53:23,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67515690] [2024-06-21 17:53:23,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:23,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:53:23,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:23,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:53:23,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:53:23,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:53:23,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 158 transitions, 1442 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:23,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:23,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:53:23,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:24,847 INFO L124 PetriNetUnfolderBase]: 2419/3862 cut-off events. [2024-06-21 17:53:24,847 INFO L125 PetriNetUnfolderBase]: For 155806/155814 co-relation queries the response was YES. [2024-06-21 17:53:24,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22559 conditions, 3862 events. 2419/3862 cut-off events. For 155806/155814 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 21955 event pairs, 623 based on Foata normal form. 28/3888 useless extension candidates. Maximal degree in co-relation 22492. Up to 3181 conditions per place. [2024-06-21 17:53:24,870 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 135 selfloop transitions, 57 changer transitions 0/197 dead transitions. [2024-06-21 17:53:24,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 197 transitions, 1980 flow [2024-06-21 17:53:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:53:24,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:53:24,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 17:53:24,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 17:53:24,871 INFO L175 Difference]: Start difference. First operand has 142 places, 158 transitions, 1442 flow. Second operand 8 states and 149 transitions. [2024-06-21 17:53:24,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 197 transitions, 1980 flow [2024-06-21 17:53:24,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 197 transitions, 1942 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 17:53:24,983 INFO L231 Difference]: Finished difference. Result has 147 places, 159 transitions, 1563 flow [2024-06-21 17:53:24,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1404, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1563, PETRI_PLACES=147, PETRI_TRANSITIONS=159} [2024-06-21 17:53:24,983 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 103 predicate places. [2024-06-21 17:53:24,983 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 159 transitions, 1563 flow [2024-06-21 17:53:24,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:24,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:24,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:24,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:53:24,984 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:24,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:24,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1745591411, now seen corresponding path program 7 times [2024-06-21 17:53:24,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:24,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576934436] [2024-06-21 17:53:24,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:24,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:27,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:27,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576934436] [2024-06-21 17:53:27,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576934436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:27,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:27,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:53:27,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646687815] [2024-06-21 17:53:27,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:27,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:53:27,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:27,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:53:27,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:53:27,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:53:27,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 159 transitions, 1563 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:27,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:27,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:53:27,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:29,758 INFO L124 PetriNetUnfolderBase]: 2383/3809 cut-off events. [2024-06-21 17:53:29,758 INFO L125 PetriNetUnfolderBase]: For 152027/152031 co-relation queries the response was YES. [2024-06-21 17:53:29,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22060 conditions, 3809 events. 2383/3809 cut-off events. For 152027/152031 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 21709 event pairs, 662 based on Foata normal form. 24/3831 useless extension candidates. Maximal degree in co-relation 21991. Up to 3125 conditions per place. [2024-06-21 17:53:29,780 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 136 selfloop transitions, 60 changer transitions 0/201 dead transitions. [2024-06-21 17:53:29,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 201 transitions, 2085 flow [2024-06-21 17:53:29,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:53:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:53:29,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 17:53:29,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-21 17:53:29,781 INFO L175 Difference]: Start difference. First operand has 147 places, 159 transitions, 1563 flow. Second operand 9 states and 164 transitions. [2024-06-21 17:53:29,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 201 transitions, 2085 flow [2024-06-21 17:53:29,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 201 transitions, 1928 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 17:53:29,904 INFO L231 Difference]: Finished difference. Result has 150 places, 159 transitions, 1533 flow [2024-06-21 17:53:29,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1533, PETRI_PLACES=150, PETRI_TRANSITIONS=159} [2024-06-21 17:53:29,905 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-21 17:53:29,905 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 159 transitions, 1533 flow [2024-06-21 17:53:29,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:29,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:29,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:29,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:53:29,906 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:29,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:29,906 INFO L85 PathProgramCache]: Analyzing trace with hash -2024797057, now seen corresponding path program 8 times [2024-06-21 17:53:29,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:29,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435461728] [2024-06-21 17:53:29,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:29,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:33,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:33,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435461728] [2024-06-21 17:53:33,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435461728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:33,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:33,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:53:33,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141376426] [2024-06-21 17:53:33,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:33,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:53:33,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:33,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:53:33,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:53:33,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:53:33,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 159 transitions, 1533 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:33,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:33,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:53:33,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:34,960 INFO L124 PetriNetUnfolderBase]: 2395/3829 cut-off events. [2024-06-21 17:53:34,960 INFO L125 PetriNetUnfolderBase]: For 147656/147660 co-relation queries the response was YES. [2024-06-21 17:53:34,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21651 conditions, 3829 events. 2395/3829 cut-off events. For 147656/147660 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 21824 event pairs, 642 based on Foata normal form. 20/3847 useless extension candidates. Maximal degree in co-relation 21581. Up to 3019 conditions per place. [2024-06-21 17:53:34,988 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 143 selfloop transitions, 63 changer transitions 0/211 dead transitions. [2024-06-21 17:53:34,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 211 transitions, 2139 flow [2024-06-21 17:53:34,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:53:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:53:34,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 17:53:34,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-21 17:53:34,990 INFO L175 Difference]: Start difference. First operand has 150 places, 159 transitions, 1533 flow. Second operand 10 states and 183 transitions. [2024-06-21 17:53:34,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 211 transitions, 2139 flow [2024-06-21 17:53:35,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 211 transitions, 1997 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 17:53:35,161 INFO L231 Difference]: Finished difference. Result has 152 places, 160 transitions, 1563 flow [2024-06-21 17:53:35,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1391, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1563, PETRI_PLACES=152, PETRI_TRANSITIONS=160} [2024-06-21 17:53:35,161 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-21 17:53:35,161 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 160 transitions, 1563 flow [2024-06-21 17:53:35,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:35,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:35,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:35,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:53:35,162 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:35,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:35,162 INFO L85 PathProgramCache]: Analyzing trace with hash -407557555, now seen corresponding path program 2 times [2024-06-21 17:53:35,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:35,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356701822] [2024-06-21 17:53:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:35,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:38,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:38,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356701822] [2024-06-21 17:53:38,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356701822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:38,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:38,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:53:38,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59092858] [2024-06-21 17:53:38,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:38,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:53:38,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:38,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:53:38,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:53:38,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:53:38,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 160 transitions, 1563 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:38,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:38,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:53:38,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:40,097 INFO L124 PetriNetUnfolderBase]: 2443/3924 cut-off events. [2024-06-21 17:53:40,097 INFO L125 PetriNetUnfolderBase]: For 153979/153987 co-relation queries the response was YES. [2024-06-21 17:53:40,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22201 conditions, 3924 events. 2443/3924 cut-off events. For 153979/153987 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22695 event pairs, 609 based on Foata normal form. 20/3942 useless extension candidates. Maximal degree in co-relation 22130. Up to 3127 conditions per place. [2024-06-21 17:53:40,126 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 139 selfloop transitions, 58 changer transitions 0/202 dead transitions. [2024-06-21 17:53:40,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 202 transitions, 2131 flow [2024-06-21 17:53:40,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:53:40,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:53:40,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 17:53:40,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 17:53:40,128 INFO L175 Difference]: Start difference. First operand has 152 places, 160 transitions, 1563 flow. Second operand 8 states and 151 transitions. [2024-06-21 17:53:40,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 202 transitions, 2131 flow [2024-06-21 17:53:40,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 202 transitions, 1971 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 17:53:40,259 INFO L231 Difference]: Finished difference. Result has 152 places, 161 transitions, 1567 flow [2024-06-21 17:53:40,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1403, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1567, PETRI_PLACES=152, PETRI_TRANSITIONS=161} [2024-06-21 17:53:40,260 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-21 17:53:40,260 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 161 transitions, 1567 flow [2024-06-21 17:53:40,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:40,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:40,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:40,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:53:40,260 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:40,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:40,261 INFO L85 PathProgramCache]: Analyzing trace with hash -96734737, now seen corresponding path program 3 times [2024-06-21 17:53:40,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:40,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436487844] [2024-06-21 17:53:40,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:40,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:43,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:43,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436487844] [2024-06-21 17:53:43,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436487844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:43,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:43,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:53:43,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361261176] [2024-06-21 17:53:43,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:43,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:53:43,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:43,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:53:43,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:53:43,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:53:43,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 161 transitions, 1567 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:43,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:43,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:53:43,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:45,081 INFO L124 PetriNetUnfolderBase]: 2423/3892 cut-off events. [2024-06-21 17:53:45,081 INFO L125 PetriNetUnfolderBase]: For 149310/149318 co-relation queries the response was YES. [2024-06-21 17:53:45,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21428 conditions, 3892 events. 2423/3892 cut-off events. For 149310/149318 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22398 event pairs, 560 based on Foata normal form. 20/3910 useless extension candidates. Maximal degree in co-relation 21356. Up to 2261 conditions per place. [2024-06-21 17:53:45,108 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 128 selfloop transitions, 67 changer transitions 0/200 dead transitions. [2024-06-21 17:53:45,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 200 transitions, 2013 flow [2024-06-21 17:53:45,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:53:45,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:53:45,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 17:53:45,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 17:53:45,109 INFO L175 Difference]: Start difference. First operand has 152 places, 161 transitions, 1567 flow. Second operand 8 states and 149 transitions. [2024-06-21 17:53:45,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 200 transitions, 2013 flow [2024-06-21 17:53:45,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 200 transitions, 1865 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 17:53:45,252 INFO L231 Difference]: Finished difference. Result has 153 places, 160 transitions, 1485 flow [2024-06-21 17:53:45,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1485, PETRI_PLACES=153, PETRI_TRANSITIONS=160} [2024-06-21 17:53:45,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 109 predicate places. [2024-06-21 17:53:45,252 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 160 transitions, 1485 flow [2024-06-21 17:53:45,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:45,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:45,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:45,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:53:45,253 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:45,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:45,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1944181611, now seen corresponding path program 2 times [2024-06-21 17:53:45,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:45,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508605270] [2024-06-21 17:53:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:45,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:47,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:47,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508605270] [2024-06-21 17:53:47,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508605270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:47,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:47,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:53:47,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821032828] [2024-06-21 17:53:47,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:47,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:53:47,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:47,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:53:47,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:53:47,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:53:47,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 160 transitions, 1485 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2024-06-21 17:53:47,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:47,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:53:47,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:48,745 INFO L124 PetriNetUnfolderBase]: 2443/3930 cut-off events. [2024-06-21 17:53:48,745 INFO L125 PetriNetUnfolderBase]: For 148630/148630 co-relation queries the response was YES. [2024-06-21 17:53:48,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21667 conditions, 3930 events. 2443/3930 cut-off events. For 148630/148630 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22692 event pairs, 698 based on Foata normal form. 4/3934 useless extension candidates. Maximal degree in co-relation 21594. Up to 3771 conditions per place. [2024-06-21 17:53:48,770 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 159 selfloop transitions, 14 changer transitions 0/178 dead transitions. [2024-06-21 17:53:48,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 178 transitions, 1907 flow [2024-06-21 17:53:48,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:53:48,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:53:48,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 17:53:48,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687707641196013 [2024-06-21 17:53:48,772 INFO L175 Difference]: Start difference. First operand has 153 places, 160 transitions, 1485 flow. Second operand 7 states and 111 transitions. [2024-06-21 17:53:48,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 178 transitions, 1907 flow [2024-06-21 17:53:48,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 178 transitions, 1686 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 17:53:48,887 INFO L231 Difference]: Finished difference. Result has 152 places, 163 transitions, 1334 flow [2024-06-21 17:53:48,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1334, PETRI_PLACES=152, PETRI_TRANSITIONS=163} [2024-06-21 17:53:48,888 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-21 17:53:48,888 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 163 transitions, 1334 flow [2024-06-21 17:53:48,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2024-06-21 17:53:48,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:48,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:48,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:53:48,888 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:48,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:48,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1944627081, now seen corresponding path program 3 times [2024-06-21 17:53:48,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:48,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052046449] [2024-06-21 17:53:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:48,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:51,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:51,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052046449] [2024-06-21 17:53:51,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052046449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:51,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:51,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:53:51,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039190388] [2024-06-21 17:53:51,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:51,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:53:51,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:51,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:53:51,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:53:51,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:53:51,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 163 transitions, 1334 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2024-06-21 17:53:51,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:51,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:53:51,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:52,664 INFO L124 PetriNetUnfolderBase]: 2431/3899 cut-off events. [2024-06-21 17:53:52,665 INFO L125 PetriNetUnfolderBase]: For 148276/148276 co-relation queries the response was YES. [2024-06-21 17:53:52,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20683 conditions, 3899 events. 2431/3899 cut-off events. For 148276/148276 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22444 event pairs, 693 based on Foata normal form. 4/3901 useless extension candidates. Maximal degree in co-relation 20611. Up to 3654 conditions per place. [2024-06-21 17:53:52,691 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 148 selfloop transitions, 29 changer transitions 0/182 dead transitions. [2024-06-21 17:53:52,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 182 transitions, 1762 flow [2024-06-21 17:53:52,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:53:52,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:53:52,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 17:53:52,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 17:53:52,692 INFO L175 Difference]: Start difference. First operand has 152 places, 163 transitions, 1334 flow. Second operand 7 states and 119 transitions. [2024-06-21 17:53:52,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 182 transitions, 1762 flow [2024-06-21 17:53:52,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 182 transitions, 1686 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 17:53:52,800 INFO L231 Difference]: Finished difference. Result has 152 places, 163 transitions, 1322 flow [2024-06-21 17:53:52,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1322, PETRI_PLACES=152, PETRI_TRANSITIONS=163} [2024-06-21 17:53:52,800 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-21 17:53:52,801 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 163 transitions, 1322 flow [2024-06-21 17:53:52,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2024-06-21 17:53:52,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:52,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:52,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:53:52,801 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:52,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:52,802 INFO L85 PathProgramCache]: Analyzing trace with hash -2121663493, now seen corresponding path program 1 times [2024-06-21 17:53:52,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:52,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529265728] [2024-06-21 17:53:52,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:52,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:54,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:54,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529265728] [2024-06-21 17:53:54,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529265728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:54,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:54,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:53:54,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736526996] [2024-06-21 17:53:54,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:54,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:53:54,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:54,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:53:54,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:53:54,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:53:54,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 163 transitions, 1322 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:54,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:54,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:53:54,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:55,780 INFO L124 PetriNetUnfolderBase]: 2275/3747 cut-off events. [2024-06-21 17:53:55,780 INFO L125 PetriNetUnfolderBase]: For 126243/126246 co-relation queries the response was YES. [2024-06-21 17:53:55,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18822 conditions, 3747 events. 2275/3747 cut-off events. For 126243/126246 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22179 event pairs, 573 based on Foata normal form. 7/3743 useless extension candidates. Maximal degree in co-relation 18751. Up to 3425 conditions per place. [2024-06-21 17:53:55,806 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 152 selfloop transitions, 26 changer transitions 0/187 dead transitions. [2024-06-21 17:53:55,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 187 transitions, 1853 flow [2024-06-21 17:53:55,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:53:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:53:55,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 17:53:55,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 17:53:55,808 INFO L175 Difference]: Start difference. First operand has 152 places, 163 transitions, 1322 flow. Second operand 6 states and 114 transitions. [2024-06-21 17:53:55,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 187 transitions, 1853 flow [2024-06-21 17:53:55,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 187 transitions, 1766 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:53:55,924 INFO L231 Difference]: Finished difference. Result has 152 places, 166 transitions, 1326 flow [2024-06-21 17:53:55,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1326, PETRI_PLACES=152, PETRI_TRANSITIONS=166} [2024-06-21 17:53:55,925 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-21 17:53:55,925 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 166 transitions, 1326 flow [2024-06-21 17:53:55,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:55,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:55,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:55,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:53:55,925 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:55,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:55,926 INFO L85 PathProgramCache]: Analyzing trace with hash 690676697, now seen corresponding path program 2 times [2024-06-21 17:53:55,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:55,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030228596] [2024-06-21 17:53:55,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:55,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:55,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:58,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:58,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030228596] [2024-06-21 17:53:58,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030228596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:58,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:58,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:53:58,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747840316] [2024-06-21 17:53:58,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:58,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:53:58,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:58,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:53:58,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:53:58,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:53:58,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 166 transitions, 1326 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:58,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:58,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:53:58,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:59,487 INFO L124 PetriNetUnfolderBase]: 2263/3731 cut-off events. [2024-06-21 17:53:59,487 INFO L125 PetriNetUnfolderBase]: For 127363/127366 co-relation queries the response was YES. [2024-06-21 17:53:59,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18650 conditions, 3731 events. 2263/3731 cut-off events. For 127363/127366 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22122 event pairs, 588 based on Foata normal form. 7/3726 useless extension candidates. Maximal degree in co-relation 18578. Up to 3417 conditions per place. [2024-06-21 17:53:59,510 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 151 selfloop transitions, 29 changer transitions 0/189 dead transitions. [2024-06-21 17:53:59,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 189 transitions, 1834 flow [2024-06-21 17:53:59,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:53:59,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:53:59,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 17:53:59,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-21 17:53:59,511 INFO L175 Difference]: Start difference. First operand has 152 places, 166 transitions, 1326 flow. Second operand 7 states and 128 transitions. [2024-06-21 17:53:59,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 189 transitions, 1834 flow [2024-06-21 17:53:59,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 189 transitions, 1758 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 17:53:59,607 INFO L231 Difference]: Finished difference. Result has 155 places, 166 transitions, 1314 flow [2024-06-21 17:53:59,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1314, PETRI_PLACES=155, PETRI_TRANSITIONS=166} [2024-06-21 17:53:59,607 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-21 17:53:59,607 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 166 transitions, 1314 flow [2024-06-21 17:53:59,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:59,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:59,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:59,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:53:59,608 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:59,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:59,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1912631115, now seen corresponding path program 3 times [2024-06-21 17:53:59,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:59,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322053237] [2024-06-21 17:53:59,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:59,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:01,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:01,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322053237] [2024-06-21 17:54:01,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322053237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:01,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:01,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:54:01,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824302660] [2024-06-21 17:54:01,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:01,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:54:01,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:01,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:54:01,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:54:01,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:54:01,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 166 transitions, 1314 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:01,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:01,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:54:01,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:02,504 INFO L124 PetriNetUnfolderBase]: 2262/3737 cut-off events. [2024-06-21 17:54:02,504 INFO L125 PetriNetUnfolderBase]: For 130082/130083 co-relation queries the response was YES. [2024-06-21 17:54:02,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18565 conditions, 3737 events. 2262/3737 cut-off events. For 130082/130083 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 22232 event pairs, 600 based on Foata normal form. 7/3735 useless extension candidates. Maximal degree in co-relation 18493. Up to 3488 conditions per place. [2024-06-21 17:54:02,537 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 157 selfloop transitions, 16 changer transitions 0/182 dead transitions. [2024-06-21 17:54:02,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 182 transitions, 1700 flow [2024-06-21 17:54:02,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:54:02,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:54:02,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:54:02,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-21 17:54:02,547 INFO L175 Difference]: Start difference. First operand has 155 places, 166 transitions, 1314 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:54:02,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 182 transitions, 1700 flow [2024-06-21 17:54:02,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 182 transitions, 1588 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 17:54:02,679 INFO L231 Difference]: Finished difference. Result has 153 places, 166 transitions, 1240 flow [2024-06-21 17:54:02,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1240, PETRI_PLACES=153, PETRI_TRANSITIONS=166} [2024-06-21 17:54:02,680 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 109 predicate places. [2024-06-21 17:54:02,680 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 166 transitions, 1240 flow [2024-06-21 17:54:02,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:02,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:02,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:02,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:54:02,680 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:54:02,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:02,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1490143089, now seen corresponding path program 1 times [2024-06-21 17:54:02,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:02,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395713099] [2024-06-21 17:54:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:02,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:05,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:05,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395713099] [2024-06-21 17:54:05,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395713099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:05,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:05,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:54:05,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489364673] [2024-06-21 17:54:05,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:05,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:54:05,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:05,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:54:05,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:54:05,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:54:05,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 166 transitions, 1240 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:05,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:05,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:54:05,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:07,038 INFO L124 PetriNetUnfolderBase]: 2420/3901 cut-off events. [2024-06-21 17:54:07,038 INFO L125 PetriNetUnfolderBase]: For 155818/155818 co-relation queries the response was YES. [2024-06-21 17:54:07,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20139 conditions, 3901 events. 2420/3901 cut-off events. For 155818/155818 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22467 event pairs, 677 based on Foata normal form. 2/3903 useless extension candidates. Maximal degree in co-relation 20069. Up to 3752 conditions per place. [2024-06-21 17:54:07,060 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 164 selfloop transitions, 13 changer transitions 0/182 dead transitions. [2024-06-21 17:54:07,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 182 transitions, 1654 flow [2024-06-21 17:54:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:54:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:54:07,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 17:54:07,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-21 17:54:07,062 INFO L175 Difference]: Start difference. First operand has 153 places, 166 transitions, 1240 flow. Second operand 7 states and 109 transitions. [2024-06-21 17:54:07,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 182 transitions, 1654 flow [2024-06-21 17:54:07,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 182 transitions, 1622 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 17:54:07,177 INFO L231 Difference]: Finished difference. Result has 154 places, 168 transitions, 1267 flow [2024-06-21 17:54:07,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1208, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1267, PETRI_PLACES=154, PETRI_TRANSITIONS=168} [2024-06-21 17:54:07,178 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-21 17:54:07,178 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 168 transitions, 1267 flow [2024-06-21 17:54:07,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:07,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:07,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:07,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:54:07,179 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:54:07,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:07,179 INFO L85 PathProgramCache]: Analyzing trace with hash -553607634, now seen corresponding path program 1 times [2024-06-21 17:54:07,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:07,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569681252] [2024-06-21 17:54:07,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:07,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:09,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:09,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569681252] [2024-06-21 17:54:09,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569681252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:09,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:09,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:54:09,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876293734] [2024-06-21 17:54:09,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:09,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:54:09,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:09,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:54:09,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:54:09,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:54:09,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 168 transitions, 1267 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2024-06-21 17:54:09,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:09,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:54:09,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:10,585 INFO L124 PetriNetUnfolderBase]: 2433/3933 cut-off events. [2024-06-21 17:54:10,585 INFO L125 PetriNetUnfolderBase]: For 162607/162609 co-relation queries the response was YES. [2024-06-21 17:54:10,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20520 conditions, 3933 events. 2433/3933 cut-off events. For 162607/162609 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22784 event pairs, 611 based on Foata normal form. 3/3936 useless extension candidates. Maximal degree in co-relation 20449. Up to 3483 conditions per place. [2024-06-21 17:54:10,613 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 165 selfloop transitions, 51 changer transitions 0/221 dead transitions. [2024-06-21 17:54:10,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 221 transitions, 2179 flow [2024-06-21 17:54:10,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:54:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:54:10,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 17:54:10,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-21 17:54:10,615 INFO L175 Difference]: Start difference. First operand has 154 places, 168 transitions, 1267 flow. Second operand 7 states and 131 transitions. [2024-06-21 17:54:10,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 221 transitions, 2179 flow [2024-06-21 17:54:10,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 221 transitions, 2136 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 17:54:10,812 INFO L231 Difference]: Finished difference. Result has 159 places, 190 transitions, 1602 flow [2024-06-21 17:54:10,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1602, PETRI_PLACES=159, PETRI_TRANSITIONS=190} [2024-06-21 17:54:10,812 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-21 17:54:10,813 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 190 transitions, 1602 flow [2024-06-21 17:54:10,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2024-06-21 17:54:10,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:10,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:10,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:54:10,813 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:54:10,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:10,814 INFO L85 PathProgramCache]: Analyzing trace with hash 833665194, now seen corresponding path program 2 times [2024-06-21 17:54:10,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:10,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074466995] [2024-06-21 17:54:10,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:10,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:12,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:12,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074466995] [2024-06-21 17:54:12,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074466995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:12,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:12,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:54:12,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557335202] [2024-06-21 17:54:12,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:12,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:54:12,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:12,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:54:12,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:54:12,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:54:12,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 190 transitions, 1602 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2024-06-21 17:54:12,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:12,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:54:12,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:14,268 INFO L124 PetriNetUnfolderBase]: 2475/3974 cut-off events. [2024-06-21 17:54:14,268 INFO L125 PetriNetUnfolderBase]: For 177959/177959 co-relation queries the response was YES. [2024-06-21 17:54:14,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22093 conditions, 3974 events. 2475/3974 cut-off events. For 177959/177959 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22963 event pairs, 676 based on Foata normal form. 2/3976 useless extension candidates. Maximal degree in co-relation 22018. Up to 3747 conditions per place. [2024-06-21 17:54:14,295 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 188 selfloop transitions, 35 changer transitions 0/228 dead transitions. [2024-06-21 17:54:14,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 228 transitions, 2385 flow [2024-06-21 17:54:14,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:54:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:54:14,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 17:54:14,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 17:54:14,296 INFO L175 Difference]: Start difference. First operand has 159 places, 190 transitions, 1602 flow. Second operand 8 states and 136 transitions. [2024-06-21 17:54:14,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 228 transitions, 2385 flow [2024-06-21 17:54:14,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 228 transitions, 2337 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-21 17:54:14,483 INFO L231 Difference]: Finished difference. Result has 167 places, 202 transitions, 1807 flow [2024-06-21 17:54:14,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1560, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1807, PETRI_PLACES=167, PETRI_TRANSITIONS=202} [2024-06-21 17:54:14,483 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-21 17:54:14,483 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 202 transitions, 1807 flow [2024-06-21 17:54:14,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2024-06-21 17:54:14,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:14,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:14,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:54:14,484 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:54:14,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:14,484 INFO L85 PathProgramCache]: Analyzing trace with hash 55597390, now seen corresponding path program 3 times [2024-06-21 17:54:14,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:14,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812484670] [2024-06-21 17:54:14,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:14,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:16,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:16,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812484670] [2024-06-21 17:54:16,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812484670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:16,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:16,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:54:16,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380910082] [2024-06-21 17:54:16,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:16,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:54:16,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:16,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:54:16,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:54:16,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:54:16,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 202 transitions, 1807 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2024-06-21 17:54:16,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:16,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:54:16,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:17,932 INFO L124 PetriNetUnfolderBase]: 2480/3986 cut-off events. [2024-06-21 17:54:17,932 INFO L125 PetriNetUnfolderBase]: For 185251/185253 co-relation queries the response was YES. [2024-06-21 17:54:17,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22828 conditions, 3986 events. 2480/3986 cut-off events. For 185251/185253 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22927 event pairs, 649 based on Foata normal form. 3/3988 useless extension candidates. Maximal degree in co-relation 22749. Up to 3535 conditions per place. [2024-06-21 17:54:17,962 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 166 selfloop transitions, 65 changer transitions 0/236 dead transitions. [2024-06-21 17:54:17,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 236 transitions, 2770 flow [2024-06-21 17:54:17,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:54:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:54:17,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 17:54:17,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 17:54:17,964 INFO L175 Difference]: Start difference. First operand has 167 places, 202 transitions, 1807 flow. Second operand 7 states and 126 transitions. [2024-06-21 17:54:17,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 236 transitions, 2770 flow [2024-06-21 17:54:18,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 236 transitions, 2661 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 17:54:18,177 INFO L231 Difference]: Finished difference. Result has 171 places, 211 transitions, 1995 flow [2024-06-21 17:54:18,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1995, PETRI_PLACES=171, PETRI_TRANSITIONS=211} [2024-06-21 17:54:18,177 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-21 17:54:18,177 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 211 transitions, 1995 flow [2024-06-21 17:54:18,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2024-06-21 17:54:18,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:18,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:18,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:54:18,178 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:54:18,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:18,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1343346518, now seen corresponding path program 4 times [2024-06-21 17:54:18,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:18,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187657965] [2024-06-21 17:54:18,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:18,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:18,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:20,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:20,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187657965] [2024-06-21 17:54:20,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187657965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:20,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:20,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:54:20,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885974155] [2024-06-21 17:54:20,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:20,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:54:20,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:20,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:54:20,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:54:20,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:54:20,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 211 transitions, 1995 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2024-06-21 17:54:20,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:20,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:54:20,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:21,774 INFO L124 PetriNetUnfolderBase]: 2485/3995 cut-off events. [2024-06-21 17:54:21,774 INFO L125 PetriNetUnfolderBase]: For 194322/194324 co-relation queries the response was YES. [2024-06-21 17:54:21,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23351 conditions, 3995 events. 2485/3995 cut-off events. For 194322/194324 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 23065 event pairs, 647 based on Foata normal form. 3/3997 useless extension candidates. Maximal degree in co-relation 23269. Up to 3539 conditions per place. [2024-06-21 17:54:21,805 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 160 selfloop transitions, 70 changer transitions 0/235 dead transitions. [2024-06-21 17:54:21,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 235 transitions, 2785 flow [2024-06-21 17:54:21,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:54:21,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:54:21,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 17:54:21,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-21 17:54:21,806 INFO L175 Difference]: Start difference. First operand has 171 places, 211 transitions, 1995 flow. Second operand 7 states and 121 transitions. [2024-06-21 17:54:21,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 235 transitions, 2785 flow [2024-06-21 17:54:22,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 235 transitions, 2717 flow, removed 33 selfloop flow, removed 1 redundant places. [2024-06-21 17:54:22,098 INFO L231 Difference]: Finished difference. Result has 177 places, 215 transitions, 2143 flow [2024-06-21 17:54:22,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2143, PETRI_PLACES=177, PETRI_TRANSITIONS=215} [2024-06-21 17:54:22,099 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-21 17:54:22,099 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 215 transitions, 2143 flow [2024-06-21 17:54:22,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2024-06-21 17:54:22,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:22,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:22,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:54:22,099 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:54:22,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:22,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1066295604, now seen corresponding path program 5 times [2024-06-21 17:54:22,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:22,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890178271] [2024-06-21 17:54:22,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:22,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:24,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:24,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890178271] [2024-06-21 17:54:24,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890178271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:24,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:24,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:54:24,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679136786] [2024-06-21 17:54:24,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:24,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:54:24,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:24,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:54:24,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:54:24,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:54:24,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 215 transitions, 2143 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2024-06-21 17:54:24,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:24,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:54:24,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:25,598 INFO L124 PetriNetUnfolderBase]: 2519/4027 cut-off events. [2024-06-21 17:54:25,598 INFO L125 PetriNetUnfolderBase]: For 206828/206828 co-relation queries the response was YES. [2024-06-21 17:54:25,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24137 conditions, 4027 events. 2519/4027 cut-off events. For 206828/206828 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23217 event pairs, 683 based on Foata normal form. 2/4027 useless extension candidates. Maximal degree in co-relation 24052. Up to 3764 conditions per place. [2024-06-21 17:54:25,626 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 189 selfloop transitions, 52 changer transitions 0/246 dead transitions. [2024-06-21 17:54:25,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 246 transitions, 3059 flow [2024-06-21 17:54:25,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:54:25,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:54:25,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 17:54:25,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-21 17:54:25,627 INFO L175 Difference]: Start difference. First operand has 177 places, 215 transitions, 2143 flow. Second operand 9 states and 147 transitions. [2024-06-21 17:54:25,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 246 transitions, 3059 flow [2024-06-21 17:54:25,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 246 transitions, 2899 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 17:54:25,913 INFO L231 Difference]: Finished difference. Result has 185 places, 225 transitions, 2285 flow [2024-06-21 17:54:25,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2285, PETRI_PLACES=185, PETRI_TRANSITIONS=225} [2024-06-21 17:54:25,914 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-21 17:54:25,914 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 225 transitions, 2285 flow [2024-06-21 17:54:25,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2024-06-21 17:54:25,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:25,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:25,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:54:25,915 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:54:25,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:25,915 INFO L85 PathProgramCache]: Analyzing trace with hash -147236694, now seen corresponding path program 6 times [2024-06-21 17:54:25,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:25,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508804274] [2024-06-21 17:54:25,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:25,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:28,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:28,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508804274] [2024-06-21 17:54:28,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508804274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:28,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:28,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:54:28,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89654017] [2024-06-21 17:54:28,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:28,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:54:28,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:28,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:54:28,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:54:28,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:54:28,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 225 transitions, 2285 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2024-06-21 17:54:28,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:28,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:54:28,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:29,437 INFO L124 PetriNetUnfolderBase]: 2516/4021 cut-off events. [2024-06-21 17:54:29,437 INFO L125 PetriNetUnfolderBase]: For 213924/213924 co-relation queries the response was YES. [2024-06-21 17:54:29,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24617 conditions, 4021 events. 2516/4021 cut-off events. For 213924/213924 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 23148 event pairs, 683 based on Foata normal form. 1/4020 useless extension candidates. Maximal degree in co-relation 24529. Up to 3762 conditions per place. [2024-06-21 17:54:29,465 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 183 selfloop transitions, 54 changer transitions 0/242 dead transitions. [2024-06-21 17:54:29,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 242 transitions, 2928 flow [2024-06-21 17:54:29,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:54:29,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:54:29,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 17:54:29,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-21 17:54:29,467 INFO L175 Difference]: Start difference. First operand has 185 places, 225 transitions, 2285 flow. Second operand 8 states and 130 transitions. [2024-06-21 17:54:29,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 242 transitions, 2928 flow [2024-06-21 17:54:29,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 242 transitions, 2758 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-21 17:54:29,719 INFO L231 Difference]: Finished difference. Result has 188 places, 225 transitions, 2229 flow [2024-06-21 17:54:29,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2115, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2229, PETRI_PLACES=188, PETRI_TRANSITIONS=225} [2024-06-21 17:54:29,719 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-21 17:54:29,719 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 225 transitions, 2229 flow [2024-06-21 17:54:29,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2024-06-21 17:54:29,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:29,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:29,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:54:29,720 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:54:29,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:29,720 INFO L85 PathProgramCache]: Analyzing trace with hash 537632442, now seen corresponding path program 1 times [2024-06-21 17:54:29,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:29,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402338905] [2024-06-21 17:54:29,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:29,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:31,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:31,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402338905] [2024-06-21 17:54:31,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402338905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:31,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:31,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:54:31,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562355885] [2024-06-21 17:54:31,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:31,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:54:31,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:31,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:54:31,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:54:31,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:54:31,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 225 transitions, 2229 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:31,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:31,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:54:31,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:33,363 INFO L124 PetriNetUnfolderBase]: 2558/4109 cut-off events. [2024-06-21 17:54:33,363 INFO L125 PetriNetUnfolderBase]: For 228300/228306 co-relation queries the response was YES. [2024-06-21 17:54:33,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25078 conditions, 4109 events. 2558/4109 cut-off events. For 228300/228306 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23780 event pairs, 616 based on Foata normal form. 8/4117 useless extension candidates. Maximal degree in co-relation 24989. Up to 3619 conditions per place. [2024-06-21 17:54:33,393 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 178 selfloop transitions, 81 changer transitions 0/264 dead transitions. [2024-06-21 17:54:33,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 264 transitions, 3177 flow [2024-06-21 17:54:33,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:54:33,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:54:33,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 17:54:33,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 17:54:33,394 INFO L175 Difference]: Start difference. First operand has 188 places, 225 transitions, 2229 flow. Second operand 7 states and 133 transitions. [2024-06-21 17:54:33,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 264 transitions, 3177 flow [2024-06-21 17:54:33,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 264 transitions, 3093 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 17:54:33,631 INFO L231 Difference]: Finished difference. Result has 190 places, 234 transitions, 2447 flow [2024-06-21 17:54:33,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2148, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2447, PETRI_PLACES=190, PETRI_TRANSITIONS=234} [2024-06-21 17:54:33,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 146 predicate places. [2024-06-21 17:54:33,632 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 234 transitions, 2447 flow [2024-06-21 17:54:33,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:33,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:33,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:33,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:54:33,632 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:54:33,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:33,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1567860794, now seen corresponding path program 2 times [2024-06-21 17:54:33,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:33,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980613695] [2024-06-21 17:54:33,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:33,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:36,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:36,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980613695] [2024-06-21 17:54:36,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980613695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:36,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:36,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:54:36,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980953418] [2024-06-21 17:54:36,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:36,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:54:36,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:36,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:54:36,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:54:36,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:54:36,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 234 transitions, 2447 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:36,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:36,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:54:36,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:37,735 INFO L124 PetriNetUnfolderBase]: 2568/4124 cut-off events. [2024-06-21 17:54:37,735 INFO L125 PetriNetUnfolderBase]: For 237281/237283 co-relation queries the response was YES. [2024-06-21 17:54:37,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25527 conditions, 4124 events. 2568/4124 cut-off events. For 237281/237283 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 23865 event pairs, 621 based on Foata normal form. 4/4128 useless extension candidates. Maximal degree in co-relation 25437. Up to 3629 conditions per place. [2024-06-21 17:54:37,771 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 180 selfloop transitions, 81 changer transitions 0/266 dead transitions. [2024-06-21 17:54:37,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 266 transitions, 3210 flow [2024-06-21 17:54:37,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:54:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:54:37,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:54:37,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-21 17:54:37,773 INFO L175 Difference]: Start difference. First operand has 190 places, 234 transitions, 2447 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:54:37,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 266 transitions, 3210 flow [2024-06-21 17:54:38,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 266 transitions, 3094 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 17:54:38,027 INFO L231 Difference]: Finished difference. Result has 195 places, 237 transitions, 2550 flow [2024-06-21 17:54:38,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2550, PETRI_PLACES=195, PETRI_TRANSITIONS=237} [2024-06-21 17:54:38,027 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-21 17:54:38,027 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 237 transitions, 2550 flow [2024-06-21 17:54:38,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:38,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:38,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:38,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:54:38,028 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:54:38,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:38,028 INFO L85 PathProgramCache]: Analyzing trace with hash -319078148, now seen corresponding path program 1 times [2024-06-21 17:54:38,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:38,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979400162] [2024-06-21 17:54:38,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:38,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:40,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:40,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979400162] [2024-06-21 17:54:40,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979400162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:40,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:40,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:54:40,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184690946] [2024-06-21 17:54:40,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:40,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:54:40,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:40,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:54:40,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:54:40,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:54:40,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 237 transitions, 2550 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:40,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:40,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:54:40,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:42,264 INFO L124 PetriNetUnfolderBase]: 2594/4164 cut-off events. [2024-06-21 17:54:42,265 INFO L125 PetriNetUnfolderBase]: For 250052/250054 co-relation queries the response was YES. [2024-06-21 17:54:42,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26095 conditions, 4164 events. 2594/4164 cut-off events. For 250052/250054 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24042 event pairs, 650 based on Foata normal form. 4/4168 useless extension candidates. Maximal degree in co-relation 26004. Up to 3419 conditions per place. [2024-06-21 17:54:42,299 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 189 selfloop transitions, 92 changer transitions 0/286 dead transitions. [2024-06-21 17:54:42,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 286 transitions, 3622 flow [2024-06-21 17:54:42,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:54:42,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:54:42,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 17:54:42,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 17:54:42,300 INFO L175 Difference]: Start difference. First operand has 195 places, 237 transitions, 2550 flow. Second operand 8 states and 150 transitions. [2024-06-21 17:54:42,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 286 transitions, 3622 flow [2024-06-21 17:54:42,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 286 transitions, 3438 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 17:54:42,679 INFO L231 Difference]: Finished difference. Result has 199 places, 252 transitions, 2826 flow [2024-06-21 17:54:42,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2366, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2826, PETRI_PLACES=199, PETRI_TRANSITIONS=252} [2024-06-21 17:54:42,679 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-21 17:54:42,680 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 252 transitions, 2826 flow [2024-06-21 17:54:42,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:42,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:42,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:42,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:54:42,680 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:54:42,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:42,680 INFO L85 PathProgramCache]: Analyzing trace with hash 74056726, now seen corresponding path program 2 times [2024-06-21 17:54:42,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:42,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134380749] [2024-06-21 17:54:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:42,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:45,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:45,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134380749] [2024-06-21 17:54:45,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134380749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:45,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:45,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:54:45,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859360969] [2024-06-21 17:54:45,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:45,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:54:45,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:45,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:54:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:54:45,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:54:45,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 252 transitions, 2826 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:45,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:45,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:54:45,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:46,885 INFO L124 PetriNetUnfolderBase]: 2710/4323 cut-off events. [2024-06-21 17:54:46,885 INFO L125 PetriNetUnfolderBase]: For 284660/284660 co-relation queries the response was YES. [2024-06-21 17:54:46,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28796 conditions, 4323 events. 2710/4323 cut-off events. For 284660/284660 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24974 event pairs, 677 based on Foata normal form. 4/4327 useless extension candidates. Maximal degree in co-relation 28702. Up to 3912 conditions per place. [2024-06-21 17:54:46,922 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 238 selfloop transitions, 62 changer transitions 0/305 dead transitions. [2024-06-21 17:54:46,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 305 transitions, 4105 flow [2024-06-21 17:54:46,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:54:46,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:54:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 17:54:46,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-21 17:54:46,924 INFO L175 Difference]: Start difference. First operand has 199 places, 252 transitions, 2826 flow. Second operand 10 states and 173 transitions. [2024-06-21 17:54:46,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 305 transitions, 4105 flow [2024-06-21 17:54:47,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 305 transitions, 4001 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-21 17:54:47,233 INFO L231 Difference]: Finished difference. Result has 207 places, 266 transitions, 3113 flow [2024-06-21 17:54:47,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3113, PETRI_PLACES=207, PETRI_TRANSITIONS=266} [2024-06-21 17:54:47,234 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-21 17:54:47,234 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 266 transitions, 3113 flow [2024-06-21 17:54:47,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:47,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:47,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:47,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:54:47,235 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:54:47,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:47,235 INFO L85 PathProgramCache]: Analyzing trace with hash 73819576, now seen corresponding path program 3 times [2024-06-21 17:54:47,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:47,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342275914] [2024-06-21 17:54:47,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:47,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:49,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:49,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342275914] [2024-06-21 17:54:49,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342275914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:49,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:49,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:54:49,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278334402] [2024-06-21 17:54:49,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:49,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:54:49,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:49,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:54:49,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:54:49,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:54:49,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 266 transitions, 3113 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:49,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:49,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:54:49,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:51,361 INFO L124 PetriNetUnfolderBase]: 2698/4295 cut-off events. [2024-06-21 17:54:51,361 INFO L125 PetriNetUnfolderBase]: For 290844/290844 co-relation queries the response was YES. [2024-06-21 17:54:51,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29295 conditions, 4295 events. 2698/4295 cut-off events. For 290844/290844 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24707 event pairs, 676 based on Foata normal form. 4/4299 useless extension candidates. Maximal degree in co-relation 29198. Up to 3906 conditions per place. [2024-06-21 17:54:51,416 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 236 selfloop transitions, 64 changer transitions 0/305 dead transitions. [2024-06-21 17:54:51,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 305 transitions, 4089 flow [2024-06-21 17:54:51,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:54:51,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:54:51,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 17:54:51,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-21 17:54:51,418 INFO L175 Difference]: Start difference. First operand has 207 places, 266 transitions, 3113 flow. Second operand 9 states and 160 transitions. [2024-06-21 17:54:51,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 305 transitions, 4089 flow [2024-06-21 17:54:52,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 305 transitions, 3896 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-21 17:54:52,028 INFO L231 Difference]: Finished difference. Result has 210 places, 270 transitions, 3168 flow [2024-06-21 17:54:52,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2930, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3168, PETRI_PLACES=210, PETRI_TRANSITIONS=270} [2024-06-21 17:54:52,029 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-21 17:54:52,029 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 270 transitions, 3168 flow [2024-06-21 17:54:52,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:52,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:52,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:52,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:54:52,030 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:54:52,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:52,030 INFO L85 PathProgramCache]: Analyzing trace with hash -141946814, now seen corresponding path program 3 times [2024-06-21 17:54:52,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:52,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145879558] [2024-06-21 17:54:52,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:52,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:54,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:54,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145879558] [2024-06-21 17:54:54,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145879558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:54,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:54,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:54:54,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25136278] [2024-06-21 17:54:54,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:54,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:54:54,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:54,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:54:54,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:54:54,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:54:54,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 270 transitions, 3168 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:54,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:54,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:54:54,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:55,677 INFO L124 PetriNetUnfolderBase]: 2686/4279 cut-off events. [2024-06-21 17:54:55,678 INFO L125 PetriNetUnfolderBase]: For 293957/293957 co-relation queries the response was YES. [2024-06-21 17:54:55,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29083 conditions, 4279 events. 2686/4279 cut-off events. For 293957/293957 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 24679 event pairs, 696 based on Foata normal form. 4/4283 useless extension candidates. Maximal degree in co-relation 28984. Up to 4046 conditions per place. [2024-06-21 17:54:55,717 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 255 selfloop transitions, 35 changer transitions 0/295 dead transitions. [2024-06-21 17:54:55,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 295 transitions, 3856 flow [2024-06-21 17:54:55,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:54:55,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:54:55,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:54:55,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-21 17:54:55,718 INFO L175 Difference]: Start difference. First operand has 210 places, 270 transitions, 3168 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:54:55,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 295 transitions, 3856 flow [2024-06-21 17:54:56,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 295 transitions, 3658 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 17:54:56,129 INFO L231 Difference]: Finished difference. Result has 212 places, 270 transitions, 3050 flow [2024-06-21 17:54:56,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2970, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3050, PETRI_PLACES=212, PETRI_TRANSITIONS=270} [2024-06-21 17:54:56,130 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-21 17:54:56,130 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 270 transitions, 3050 flow [2024-06-21 17:54:56,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:56,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:56,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:56,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:54:56,131 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:54:56,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:56,131 INFO L85 PathProgramCache]: Analyzing trace with hash -141700550, now seen corresponding path program 1 times [2024-06-21 17:54:56,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:56,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879517355] [2024-06-21 17:54:56,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:56,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:59,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:59,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879517355] [2024-06-21 17:54:59,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879517355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:59,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:59,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:54:59,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73647049] [2024-06-21 17:54:59,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:59,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:54:59,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:59,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:54:59,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:54:59,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:54:59,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 270 transitions, 3050 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:59,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:59,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:54:59,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:01,402 INFO L124 PetriNetUnfolderBase]: 2730/4347 cut-off events. [2024-06-21 17:55:01,402 INFO L125 PetriNetUnfolderBase]: For 316439/316439 co-relation queries the response was YES. [2024-06-21 17:55:01,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29329 conditions, 4347 events. 2730/4347 cut-off events. For 316439/316439 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25096 event pairs, 679 based on Foata normal form. 12/4359 useless extension candidates. Maximal degree in co-relation 29229. Up to 4026 conditions per place. [2024-06-21 17:55:01,442 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 262 selfloop transitions, 39 changer transitions 0/306 dead transitions. [2024-06-21 17:55:01,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 306 transitions, 3854 flow [2024-06-21 17:55:01,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:55:01,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:55:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 17:55:01,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-21 17:55:01,443 INFO L175 Difference]: Start difference. First operand has 212 places, 270 transitions, 3050 flow. Second operand 8 states and 142 transitions. [2024-06-21 17:55:01,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 306 transitions, 3854 flow [2024-06-21 17:55:01,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 306 transitions, 3784 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:55:01,799 INFO L231 Difference]: Finished difference. Result has 213 places, 271 transitions, 3082 flow [2024-06-21 17:55:01,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2980, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3082, PETRI_PLACES=213, PETRI_TRANSITIONS=271} [2024-06-21 17:55:01,799 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-21 17:55:01,799 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 271 transitions, 3082 flow [2024-06-21 17:55:01,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:01,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:01,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:01,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:55:01,800 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:55:01,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:01,800 INFO L85 PathProgramCache]: Analyzing trace with hash 922148094, now seen corresponding path program 4 times [2024-06-21 17:55:01,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:01,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299885673] [2024-06-21 17:55:01,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:01,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:04,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:04,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299885673] [2024-06-21 17:55:04,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299885673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:04,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:04,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:04,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20284604] [2024-06-21 17:55:04,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:04,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:04,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:04,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:04,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:04,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:55:04,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 271 transitions, 3082 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:04,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:04,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:55:04,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:06,202 INFO L124 PetriNetUnfolderBase]: 2740/4364 cut-off events. [2024-06-21 17:55:06,203 INFO L125 PetriNetUnfolderBase]: For 308732/308734 co-relation queries the response was YES. [2024-06-21 17:55:06,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29698 conditions, 4364 events. 2740/4364 cut-off events. For 308732/308734 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25179 event pairs, 695 based on Foata normal form. 4/4367 useless extension candidates. Maximal degree in co-relation 29597. Up to 3874 conditions per place. [2024-06-21 17:55:06,242 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 206 selfloop transitions, 88 changer transitions 0/299 dead transitions. [2024-06-21 17:55:06,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 299 transitions, 3916 flow [2024-06-21 17:55:06,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:55:06,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:55:06,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:55:06,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-21 17:55:06,244 INFO L175 Difference]: Start difference. First operand has 213 places, 271 transitions, 3082 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:55:06,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 299 transitions, 3916 flow [2024-06-21 17:55:06,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 299 transitions, 3836 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:55:06,556 INFO L231 Difference]: Finished difference. Result has 215 places, 274 transitions, 3236 flow [2024-06-21 17:55:06,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3002, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3236, PETRI_PLACES=215, PETRI_TRANSITIONS=274} [2024-06-21 17:55:06,556 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-21 17:55:06,557 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 274 transitions, 3236 flow [2024-06-21 17:55:06,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:06,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:06,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:06,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:55:06,557 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:55:06,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:06,558 INFO L85 PathProgramCache]: Analyzing trace with hash 922148280, now seen corresponding path program 4 times [2024-06-21 17:55:06,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:06,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073031899] [2024-06-21 17:55:06,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:06,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:08,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:08,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073031899] [2024-06-21 17:55:08,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073031899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:08,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:08,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:08,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064359968] [2024-06-21 17:55:08,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:08,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:08,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:08,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:08,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:08,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:55:08,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 274 transitions, 3236 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:08,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:08,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:55:08,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:10,772 INFO L124 PetriNetUnfolderBase]: 2750/4380 cut-off events. [2024-06-21 17:55:10,772 INFO L125 PetriNetUnfolderBase]: For 319730/319732 co-relation queries the response was YES. [2024-06-21 17:55:10,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30152 conditions, 4380 events. 2750/4380 cut-off events. For 319730/319732 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 25291 event pairs, 734 based on Foata normal form. 4/4383 useless extension candidates. Maximal degree in co-relation 30050. Up to 3596 conditions per place. [2024-06-21 17:55:10,810 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 193 selfloop transitions, 112 changer transitions 0/310 dead transitions. [2024-06-21 17:55:10,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 310 transitions, 4440 flow [2024-06-21 17:55:10,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:55:10,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:55:10,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:55:10,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 17:55:10,811 INFO L175 Difference]: Start difference. First operand has 215 places, 274 transitions, 3236 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:55:10,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 310 transitions, 4440 flow [2024-06-21 17:55:11,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 310 transitions, 4242 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 17:55:11,246 INFO L231 Difference]: Finished difference. Result has 217 places, 280 transitions, 3410 flow [2024-06-21 17:55:11,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3038, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3410, PETRI_PLACES=217, PETRI_TRANSITIONS=280} [2024-06-21 17:55:11,246 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-21 17:55:11,246 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 280 transitions, 3410 flow [2024-06-21 17:55:11,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:11,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:11,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:11,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:55:11,247 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:55:11,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:11,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1993181606, now seen corresponding path program 5 times [2024-06-21 17:55:11,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:11,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969924335] [2024-06-21 17:55:11,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:11,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:13,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:13,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969924335] [2024-06-21 17:55:13,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969924335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:13,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:13,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:55:13,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540619563] [2024-06-21 17:55:13,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:13,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:55:13,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:13,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:55:13,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:55:13,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:55:13,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 280 transitions, 3410 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:13,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:13,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:55:13,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:14,969 INFO L124 PetriNetUnfolderBase]: 2760/4401 cut-off events. [2024-06-21 17:55:14,969 INFO L125 PetriNetUnfolderBase]: For 330835/330843 co-relation queries the response was YES. [2024-06-21 17:55:14,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30570 conditions, 4401 events. 2760/4401 cut-off events. For 330835/330843 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 25477 event pairs, 657 based on Foata normal form. 10/4410 useless extension candidates. Maximal degree in co-relation 30467. Up to 3898 conditions per place. [2024-06-21 17:55:14,999 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 217 selfloop transitions, 88 changer transitions 0/310 dead transitions. [2024-06-21 17:55:14,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 310 transitions, 4421 flow [2024-06-21 17:55:15,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:55:15,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:55:15,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 17:55:15,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-21 17:55:15,000 INFO L175 Difference]: Start difference. First operand has 217 places, 280 transitions, 3410 flow. Second operand 7 states and 127 transitions. [2024-06-21 17:55:15,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 310 transitions, 4421 flow [2024-06-21 17:55:15,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 310 transitions, 4299 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-21 17:55:15,308 INFO L231 Difference]: Finished difference. Result has 221 places, 284 transitions, 3546 flow [2024-06-21 17:55:15,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3288, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3546, PETRI_PLACES=221, PETRI_TRANSITIONS=284} [2024-06-21 17:55:15,308 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-21 17:55:15,308 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 284 transitions, 3546 flow [2024-06-21 17:55:15,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:15,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:15,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:15,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:55:15,309 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:55:15,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:15,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1649782248, now seen corresponding path program 6 times [2024-06-21 17:55:15,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:15,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708399941] [2024-06-21 17:55:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:15,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:17,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:17,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708399941] [2024-06-21 17:55:17,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708399941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:17,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:17,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:55:17,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797600360] [2024-06-21 17:55:17,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:17,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:55:17,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:17,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:55:17,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:55:17,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:55:17,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 284 transitions, 3546 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:17,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:17,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:55:17,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:19,329 INFO L124 PetriNetUnfolderBase]: 2770/4409 cut-off events. [2024-06-21 17:55:19,329 INFO L125 PetriNetUnfolderBase]: For 341405/341413 co-relation queries the response was YES. [2024-06-21 17:55:19,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31023 conditions, 4409 events. 2770/4409 cut-off events. For 341405/341413 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25530 event pairs, 665 based on Foata normal form. 10/4418 useless extension candidates. Maximal degree in co-relation 30917. Up to 3908 conditions per place. [2024-06-21 17:55:19,362 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 211 selfloop transitions, 93 changer transitions 0/309 dead transitions. [2024-06-21 17:55:19,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 309 transitions, 4411 flow [2024-06-21 17:55:19,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:55:19,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:55:19,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:55:19,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-21 17:55:19,364 INFO L175 Difference]: Start difference. First operand has 221 places, 284 transitions, 3546 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:55:19,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 309 transitions, 4411 flow [2024-06-21 17:55:19,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 309 transitions, 4303 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 17:55:19,728 INFO L231 Difference]: Finished difference. Result has 226 places, 288 transitions, 3701 flow [2024-06-21 17:55:19,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3446, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3701, PETRI_PLACES=226, PETRI_TRANSITIONS=288} [2024-06-21 17:55:19,729 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-21 17:55:19,729 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 288 transitions, 3701 flow [2024-06-21 17:55:19,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:19,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:19,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:19,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:55:19,729 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:55:19,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:19,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1979831820, now seen corresponding path program 5 times [2024-06-21 17:55:19,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:19,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779875597] [2024-06-21 17:55:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:19,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:22,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:22,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779875597] [2024-06-21 17:55:22,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779875597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:22,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:22,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:22,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001978509] [2024-06-21 17:55:22,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:22,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:22,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:22,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:22,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:22,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:55:22,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 288 transitions, 3701 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:22,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:22,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:55:22,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:23,960 INFO L124 PetriNetUnfolderBase]: 2796/4460 cut-off events. [2024-06-21 17:55:23,960 INFO L125 PetriNetUnfolderBase]: For 357921/357923 co-relation queries the response was YES. [2024-06-21 17:55:23,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31673 conditions, 4460 events. 2796/4460 cut-off events. For 357921/357923 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 25816 event pairs, 741 based on Foata normal form. 4/4463 useless extension candidates. Maximal degree in co-relation 31565. Up to 3623 conditions per place. [2024-06-21 17:55:23,995 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 193 selfloop transitions, 123 changer transitions 0/321 dead transitions. [2024-06-21 17:55:23,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 321 transitions, 4917 flow [2024-06-21 17:55:23,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:55:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:55:23,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:55:23,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-21 17:55:23,996 INFO L175 Difference]: Start difference. First operand has 226 places, 288 transitions, 3701 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:55:23,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 321 transitions, 4917 flow [2024-06-21 17:55:24,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 321 transitions, 4787 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 17:55:24,417 INFO L231 Difference]: Finished difference. Result has 231 places, 294 transitions, 3947 flow [2024-06-21 17:55:24,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3571, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3947, PETRI_PLACES=231, PETRI_TRANSITIONS=294} [2024-06-21 17:55:24,418 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-21 17:55:24,418 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 294 transitions, 3947 flow [2024-06-21 17:55:24,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:24,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:24,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:24,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:55:24,418 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:55:24,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:24,418 INFO L85 PathProgramCache]: Analyzing trace with hash 771018168, now seen corresponding path program 7 times [2024-06-21 17:55:24,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:24,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705032355] [2024-06-21 17:55:24,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:24,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:27,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:27,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705032355] [2024-06-21 17:55:27,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705032355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:27,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:27,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:27,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837843863] [2024-06-21 17:55:27,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:27,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:27,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:27,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:27,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:27,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:55:27,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 294 transitions, 3947 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:27,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:27,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:55:27,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:29,158 INFO L124 PetriNetUnfolderBase]: 2790/4450 cut-off events. [2024-06-21 17:55:29,158 INFO L125 PetriNetUnfolderBase]: For 364927/364929 co-relation queries the response was YES. [2024-06-21 17:55:29,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31824 conditions, 4450 events. 2790/4450 cut-off events. For 364927/364929 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 25862 event pairs, 702 based on Foata normal form. 4/4453 useless extension candidates. Maximal degree in co-relation 31715. Up to 3939 conditions per place. [2024-06-21 17:55:29,194 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 217 selfloop transitions, 98 changer transitions 0/320 dead transitions. [2024-06-21 17:55:29,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 320 transitions, 4909 flow [2024-06-21 17:55:29,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:55:29,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:55:29,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-21 17:55:29,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3744186046511628 [2024-06-21 17:55:29,195 INFO L175 Difference]: Start difference. First operand has 231 places, 294 transitions, 3947 flow. Second operand 10 states and 161 transitions. [2024-06-21 17:55:29,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 320 transitions, 4909 flow [2024-06-21 17:55:29,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 320 transitions, 4675 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 17:55:29,585 INFO L231 Difference]: Finished difference. Result has 237 places, 294 transitions, 3915 flow [2024-06-21 17:55:29,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3713, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3915, PETRI_PLACES=237, PETRI_TRANSITIONS=294} [2024-06-21 17:55:29,586 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-21 17:55:29,586 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 294 transitions, 3915 flow [2024-06-21 17:55:29,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:29,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:29,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:29,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:55:29,586 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:55:29,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:29,586 INFO L85 PathProgramCache]: Analyzing trace with hash -2063891584, now seen corresponding path program 6 times [2024-06-21 17:55:29,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:29,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202113677] [2024-06-21 17:55:29,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:29,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:32,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:32,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202113677] [2024-06-21 17:55:32,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202113677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:32,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:32,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:32,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820461587] [2024-06-21 17:55:32,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:32,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:32,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:32,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:32,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:32,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:55:32,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 294 transitions, 3915 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:32,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:32,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:55:32,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:33,957 INFO L124 PetriNetUnfolderBase]: 2784/4444 cut-off events. [2024-06-21 17:55:33,957 INFO L125 PetriNetUnfolderBase]: For 369718/369720 co-relation queries the response was YES. [2024-06-21 17:55:33,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31605 conditions, 4444 events. 2784/4444 cut-off events. For 369718/369720 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 25830 event pairs, 693 based on Foata normal form. 4/4448 useless extension candidates. Maximal degree in co-relation 31495. Up to 4132 conditions per place. [2024-06-21 17:55:33,992 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 268 selfloop transitions, 43 changer transitions 0/316 dead transitions. [2024-06-21 17:55:33,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 316 transitions, 4593 flow [2024-06-21 17:55:33,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:55:33,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:55:33,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 17:55:33,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-21 17:55:33,993 INFO L175 Difference]: Start difference. First operand has 237 places, 294 transitions, 3915 flow. Second operand 8 states and 134 transitions. [2024-06-21 17:55:33,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 316 transitions, 4593 flow [2024-06-21 17:55:34,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 316 transitions, 4379 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 17:55:34,590 INFO L231 Difference]: Finished difference. Result has 239 places, 294 transitions, 3793 flow [2024-06-21 17:55:34,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3701, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3793, PETRI_PLACES=239, PETRI_TRANSITIONS=294} [2024-06-21 17:55:34,590 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-21 17:55:34,590 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 294 transitions, 3793 flow [2024-06-21 17:55:34,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:34,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:34,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:34,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 17:55:34,591 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:55:34,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1640541228, now seen corresponding path program 8 times [2024-06-21 17:55:34,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:34,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075705727] [2024-06-21 17:55:34,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:34,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:37,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:37,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075705727] [2024-06-21 17:55:37,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075705727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:37,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:37,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:37,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848739161] [2024-06-21 17:55:37,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:37,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:37,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:37,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:37,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:37,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:55:37,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 294 transitions, 3793 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:37,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:37,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:55:37,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:38,940 INFO L124 PetriNetUnfolderBase]: 2778/4430 cut-off events. [2024-06-21 17:55:38,940 INFO L125 PetriNetUnfolderBase]: For 374041/374043 co-relation queries the response was YES. [2024-06-21 17:55:38,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31224 conditions, 4430 events. 2778/4430 cut-off events. For 374041/374043 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25688 event pairs, 691 based on Foata normal form. 4/4433 useless extension candidates. Maximal degree in co-relation 31113. Up to 3926 conditions per place. [2024-06-21 17:55:38,974 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 214 selfloop transitions, 97 changer transitions 0/316 dead transitions. [2024-06-21 17:55:38,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 316 transitions, 4611 flow [2024-06-21 17:55:38,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:55:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:55:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:55:38,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-21 17:55:38,982 INFO L175 Difference]: Start difference. First operand has 239 places, 294 transitions, 3793 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:55:38,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 316 transitions, 4611 flow [2024-06-21 17:55:39,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 316 transitions, 4495 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 17:55:39,524 INFO L231 Difference]: Finished difference. Result has 240 places, 294 transitions, 3877 flow [2024-06-21 17:55:39,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3677, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3877, PETRI_PLACES=240, PETRI_TRANSITIONS=294} [2024-06-21 17:55:39,524 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-21 17:55:39,524 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 294 transitions, 3877 flow [2024-06-21 17:55:39,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:39,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:39,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:39,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 17:55:39,525 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:55:39,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:39,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1304814132, now seen corresponding path program 7 times [2024-06-21 17:55:39,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:39,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143527120] [2024-06-21 17:55:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:39,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:42,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:42,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143527120] [2024-06-21 17:55:42,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143527120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:42,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:42,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:42,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109936330] [2024-06-21 17:55:42,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:42,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:42,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:42,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:42,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:42,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:55:42,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 294 transitions, 3877 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:42,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:42,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:55:42,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:44,008 INFO L124 PetriNetUnfolderBase]: 2990/4711 cut-off events. [2024-06-21 17:55:44,009 INFO L125 PetriNetUnfolderBase]: For 448105/448105 co-relation queries the response was YES. [2024-06-21 17:55:44,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35360 conditions, 4711 events. 2990/4711 cut-off events. For 448105/448105 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 27203 event pairs, 699 based on Foata normal form. 4/4713 useless extension candidates. Maximal degree in co-relation 35248. Up to 4023 conditions per place. [2024-06-21 17:55:44,045 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 242 selfloop transitions, 107 changer transitions 0/354 dead transitions. [2024-06-21 17:55:44,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 354 transitions, 5674 flow [2024-06-21 17:55:44,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:55:44,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:55:44,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-21 17:55:44,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 17:55:44,047 INFO L175 Difference]: Start difference. First operand has 240 places, 294 transitions, 3877 flow. Second operand 11 states and 187 transitions. [2024-06-21 17:55:44,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 354 transitions, 5674 flow [2024-06-21 17:55:44,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 354 transitions, 5478 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:55:44,684 INFO L231 Difference]: Finished difference. Result has 246 places, 316 transitions, 4348 flow [2024-06-21 17:55:44,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3683, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4348, PETRI_PLACES=246, PETRI_TRANSITIONS=316} [2024-06-21 17:55:44,685 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-21 17:55:44,685 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 316 transitions, 4348 flow [2024-06-21 17:55:44,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:44,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:44,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:44,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 17:55:44,686 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:55:44,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:44,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1947535700, now seen corresponding path program 8 times [2024-06-21 17:55:44,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:44,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237655357] [2024-06-21 17:55:44,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:44,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:47,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:47,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237655357] [2024-06-21 17:55:47,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237655357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:47,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:47,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:47,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922499326] [2024-06-21 17:55:47,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:47,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:47,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:47,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:47,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:47,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:55:47,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 316 transitions, 4348 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:47,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:47,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:55:47,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:49,461 INFO L124 PetriNetUnfolderBase]: 2984/4714 cut-off events. [2024-06-21 17:55:49,461 INFO L125 PetriNetUnfolderBase]: For 457028/457028 co-relation queries the response was YES. [2024-06-21 17:55:49,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36178 conditions, 4714 events. 2984/4714 cut-off events. For 457028/457028 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 27340 event pairs, 738 based on Foata normal form. 2/4716 useless extension candidates. Maximal degree in co-relation 36063. Up to 4443 conditions per place. [2024-06-21 17:55:49,501 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 305 selfloop transitions, 32 changer transitions 0/342 dead transitions. [2024-06-21 17:55:49,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 342 transitions, 5320 flow [2024-06-21 17:55:49,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:55:49,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:55:49,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-21 17:55:49,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3627906976744186 [2024-06-21 17:55:49,503 INFO L175 Difference]: Start difference. First operand has 246 places, 316 transitions, 4348 flow. Second operand 10 states and 156 transitions. [2024-06-21 17:55:49,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 342 transitions, 5320 flow [2024-06-21 17:55:50,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 342 transitions, 4980 flow, removed 103 selfloop flow, removed 8 redundant places. [2024-06-21 17:55:50,215 INFO L231 Difference]: Finished difference. Result has 249 places, 318 transitions, 4159 flow [2024-06-21 17:55:50,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4008, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4159, PETRI_PLACES=249, PETRI_TRANSITIONS=318} [2024-06-21 17:55:50,216 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-21 17:55:50,216 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 318 transitions, 4159 flow [2024-06-21 17:55:50,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:50,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:50,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:50,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 17:55:50,216 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:55:50,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:50,216 INFO L85 PathProgramCache]: Analyzing trace with hash -268922410, now seen corresponding path program 9 times [2024-06-21 17:55:50,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:50,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080366940] [2024-06-21 17:55:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:50,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:52,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:52,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080366940] [2024-06-21 17:55:52,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080366940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:52,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:52,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:52,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625555221] [2024-06-21 17:55:52,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:52,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:52,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:52,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:52,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:52,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:55:52,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 318 transitions, 4159 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:52,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:52,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:55:52,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:54,565 INFO L124 PetriNetUnfolderBase]: 3004/4744 cut-off events. [2024-06-21 17:55:54,566 INFO L125 PetriNetUnfolderBase]: For 462285/462285 co-relation queries the response was YES. [2024-06-21 17:55:54,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35399 conditions, 4744 events. 3004/4744 cut-off events. For 462285/462285 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27543 event pairs, 731 based on Foata normal form. 2/4746 useless extension candidates. Maximal degree in co-relation 35283. Up to 4520 conditions per place. [2024-06-21 17:55:54,606 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 312 selfloop transitions, 27 changer transitions 0/344 dead transitions. [2024-06-21 17:55:54,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 344 transitions, 4999 flow [2024-06-21 17:55:54,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:55:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:55:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 17:55:54,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3643410852713178 [2024-06-21 17:55:54,608 INFO L175 Difference]: Start difference. First operand has 249 places, 318 transitions, 4159 flow. Second operand 9 states and 141 transitions. [2024-06-21 17:55:54,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 344 transitions, 4999 flow [2024-06-21 17:55:55,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 344 transitions, 4874 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 17:55:55,237 INFO L231 Difference]: Finished difference. Result has 252 places, 324 transitions, 4214 flow [2024-06-21 17:55:55,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4041, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4214, PETRI_PLACES=252, PETRI_TRANSITIONS=324} [2024-06-21 17:55:55,237 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-21 17:55:55,238 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 324 transitions, 4214 flow [2024-06-21 17:55:55,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:55,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:55,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:55,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 17:55:55,238 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:55:55,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:55,238 INFO L85 PathProgramCache]: Analyzing trace with hash -476021506, now seen corresponding path program 9 times [2024-06-21 17:55:55,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:55,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590918795] [2024-06-21 17:55:55,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:55,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:57,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:57,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590918795] [2024-06-21 17:55:57,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590918795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:57,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:57,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:55:57,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104346073] [2024-06-21 17:55:57,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:57,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:55:57,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:57,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:55:57,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:55:57,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:55:57,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 324 transitions, 4214 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:57,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:57,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:55:57,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:59,114 INFO L124 PetriNetUnfolderBase]: 2992/4727 cut-off events. [2024-06-21 17:55:59,114 INFO L125 PetriNetUnfolderBase]: For 469121/469121 co-relation queries the response was YES. [2024-06-21 17:55:59,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35033 conditions, 4727 events. 2992/4727 cut-off events. For 469121/469121 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27471 event pairs, 762 based on Foata normal form. 4/4729 useless extension candidates. Maximal degree in co-relation 34916. Up to 4435 conditions per place. [2024-06-21 17:55:59,152 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 283 selfloop transitions, 56 changer transitions 0/344 dead transitions. [2024-06-21 17:55:59,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 344 transitions, 5105 flow [2024-06-21 17:55:59,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:55:59,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:55:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 17:55:59,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-21 17:55:59,154 INFO L175 Difference]: Start difference. First operand has 252 places, 324 transitions, 4214 flow. Second operand 9 states and 147 transitions. [2024-06-21 17:55:59,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 344 transitions, 5105 flow [2024-06-21 17:55:59,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 344 transitions, 5007 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 17:55:59,850 INFO L231 Difference]: Finished difference. Result has 255 places, 324 transitions, 4239 flow [2024-06-21 17:55:59,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4116, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4239, PETRI_PLACES=255, PETRI_TRANSITIONS=324} [2024-06-21 17:55:59,850 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 211 predicate places. [2024-06-21 17:55:59,851 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 324 transitions, 4239 flow [2024-06-21 17:55:59,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:59,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:59,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:59,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 17:55:59,851 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:55:59,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:59,851 INFO L85 PathProgramCache]: Analyzing trace with hash -2021755050, now seen corresponding path program 10 times [2024-06-21 17:55:59,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:59,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425996089] [2024-06-21 17:55:59,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:59,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:02,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:02,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425996089] [2024-06-21 17:56:02,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425996089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:02,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:02,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:56:02,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144521667] [2024-06-21 17:56:02,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:02,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:56:02,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:02,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:56:02,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:56:02,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:56:02,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 324 transitions, 4239 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:02,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:02,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:56:02,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:03,607 INFO L124 PetriNetUnfolderBase]: 2986/4703 cut-off events. [2024-06-21 17:56:03,607 INFO L125 PetriNetUnfolderBase]: For 469492/469492 co-relation queries the response was YES. [2024-06-21 17:56:03,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34963 conditions, 4703 events. 2986/4703 cut-off events. For 469492/469492 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27249 event pairs, 761 based on Foata normal form. 2/4703 useless extension candidates. Maximal degree in co-relation 34845. Up to 4430 conditions per place. [2024-06-21 17:56:03,659 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 278 selfloop transitions, 57 changer transitions 0/340 dead transitions. [2024-06-21 17:56:03,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 340 transitions, 4953 flow [2024-06-21 17:56:03,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:56:03,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:56:03,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 17:56:03,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-21 17:56:03,661 INFO L175 Difference]: Start difference. First operand has 255 places, 324 transitions, 4239 flow. Second operand 8 states and 130 transitions. [2024-06-21 17:56:03,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 340 transitions, 4953 flow [2024-06-21 17:56:04,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 340 transitions, 4858 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:56:04,706 INFO L231 Difference]: Finished difference. Result has 257 places, 324 transitions, 4264 flow [2024-06-21 17:56:04,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4144, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4264, PETRI_PLACES=257, PETRI_TRANSITIONS=324} [2024-06-21 17:56:04,707 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-21 17:56:04,707 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 324 transitions, 4264 flow [2024-06-21 17:56:04,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:04,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:04,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:04,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 17:56:04,707 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:56:04,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:04,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1359879060, now seen corresponding path program 10 times [2024-06-21 17:56:04,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:04,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895672352] [2024-06-21 17:56:04,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:04,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:04,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:07,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:07,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895672352] [2024-06-21 17:56:07,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895672352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:07,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:07,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:07,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281331845] [2024-06-21 17:56:07,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:07,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:07,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:07,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:07,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:56:07,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:56:07,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 324 transitions, 4264 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:07,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:07,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:56:07,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:09,404 INFO L124 PetriNetUnfolderBase]: 2974/4695 cut-off events. [2024-06-21 17:56:09,405 INFO L125 PetriNetUnfolderBase]: For 475684/475684 co-relation queries the response was YES. [2024-06-21 17:56:09,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34694 conditions, 4695 events. 2974/4695 cut-off events. For 475684/475684 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27150 event pairs, 701 based on Foata normal form. 4/4697 useless extension candidates. Maximal degree in co-relation 34575. Up to 4013 conditions per place. [2024-06-21 17:56:09,444 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 240 selfloop transitions, 115 changer transitions 0/360 dead transitions. [2024-06-21 17:56:09,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 360 transitions, 5679 flow [2024-06-21 17:56:09,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:56:09,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:56:09,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 17:56:09,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:56:09,446 INFO L175 Difference]: Start difference. First operand has 257 places, 324 transitions, 4264 flow. Second operand 10 states and 172 transitions. [2024-06-21 17:56:09,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 360 transitions, 5679 flow [2024-06-21 17:56:10,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 360 transitions, 5489 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 17:56:10,009 INFO L231 Difference]: Finished difference. Result has 258 places, 330 transitions, 4446 flow [2024-06-21 17:56:10,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4074, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4446, PETRI_PLACES=258, PETRI_TRANSITIONS=330} [2024-06-21 17:56:10,009 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-21 17:56:10,010 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 330 transitions, 4446 flow [2024-06-21 17:56:10,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:10,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:10,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:10,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 17:56:10,010 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:56:10,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:10,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1794879120, now seen corresponding path program 11 times [2024-06-21 17:56:10,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:10,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003434792] [2024-06-21 17:56:10,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:10,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:12,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:12,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003434792] [2024-06-21 17:56:12,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003434792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:12,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:12,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:12,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013342840] [2024-06-21 17:56:12,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:12,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:12,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:12,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:12,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:56:12,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:56:12,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 330 transitions, 4446 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:12,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:12,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:56:12,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:14,600 INFO L124 PetriNetUnfolderBase]: 2968/4698 cut-off events. [2024-06-21 17:56:14,601 INFO L125 PetriNetUnfolderBase]: For 477694/477694 co-relation queries the response was YES. [2024-06-21 17:56:14,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34906 conditions, 4698 events. 2968/4698 cut-off events. For 477694/477694 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27295 event pairs, 726 based on Foata normal form. 2/4700 useless extension candidates. Maximal degree in co-relation 34786. Up to 4408 conditions per place. [2024-06-21 17:56:14,645 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 315 selfloop transitions, 38 changer transitions 0/358 dead transitions. [2024-06-21 17:56:14,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 358 transitions, 5405 flow [2024-06-21 17:56:14,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:56:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:56:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 182 transitions. [2024-06-21 17:56:14,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35271317829457366 [2024-06-21 17:56:14,647 INFO L175 Difference]: Start difference. First operand has 258 places, 330 transitions, 4446 flow. Second operand 12 states and 182 transitions. [2024-06-21 17:56:14,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 358 transitions, 5405 flow [2024-06-21 17:56:15,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 358 transitions, 5254 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 17:56:15,411 INFO L231 Difference]: Finished difference. Result has 265 places, 331 transitions, 4420 flow [2024-06-21 17:56:15,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4295, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4420, PETRI_PLACES=265, PETRI_TRANSITIONS=331} [2024-06-21 17:56:15,411 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-21 17:56:15,412 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 331 transitions, 4420 flow [2024-06-21 17:56:15,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:15,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:15,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:15,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 17:56:15,412 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:56:15,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:15,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2022021774, now seen corresponding path program 12 times [2024-06-21 17:56:15,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:15,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106293898] [2024-06-21 17:56:15,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:15,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:18,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:18,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106293898] [2024-06-21 17:56:18,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106293898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:18,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:18,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:18,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32817663] [2024-06-21 17:56:18,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:18,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:18,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:18,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:18,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:56:18,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:56:18,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 331 transitions, 4420 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:18,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:18,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:56:18,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:19,532 INFO L124 PetriNetUnfolderBase]: 2962/4673 cut-off events. [2024-06-21 17:56:19,532 INFO L125 PetriNetUnfolderBase]: For 481087/481087 co-relation queries the response was YES. [2024-06-21 17:56:19,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34790 conditions, 4673 events. 2962/4673 cut-off events. For 481087/481087 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27002 event pairs, 696 based on Foata normal form. 2/4673 useless extension candidates. Maximal degree in co-relation 34668. Up to 4007 conditions per place. [2024-06-21 17:56:19,578 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 227 selfloop transitions, 123 changer transitions 0/355 dead transitions. [2024-06-21 17:56:19,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 355 transitions, 5505 flow [2024-06-21 17:56:19,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:56:19,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:56:19,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 17:56:19,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-21 17:56:19,580 INFO L175 Difference]: Start difference. First operand has 265 places, 331 transitions, 4420 flow. Second operand 9 states and 152 transitions. [2024-06-21 17:56:19,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 355 transitions, 5505 flow [2024-06-21 17:56:20,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 355 transitions, 5319 flow, removed 44 selfloop flow, removed 10 redundant places. [2024-06-21 17:56:20,172 INFO L231 Difference]: Finished difference. Result has 264 places, 331 transitions, 4486 flow [2024-06-21 17:56:20,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4234, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4486, PETRI_PLACES=264, PETRI_TRANSITIONS=331} [2024-06-21 17:56:20,173 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-21 17:56:20,173 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 331 transitions, 4486 flow [2024-06-21 17:56:20,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:20,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:20,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:20,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 17:56:20,173 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:56:20,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:20,173 INFO L85 PathProgramCache]: Analyzing trace with hash -475775242, now seen corresponding path program 2 times [2024-06-21 17:56:20,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:20,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167692508] [2024-06-21 17:56:20,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:20,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:23,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:23,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167692508] [2024-06-21 17:56:23,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167692508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:23,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:23,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:56:23,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775613698] [2024-06-21 17:56:23,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:23,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:56:23,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:23,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:56:23,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:56:23,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:56:23,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 331 transitions, 4486 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:23,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:23,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:56:23,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:25,496 INFO L124 PetriNetUnfolderBase]: 3006/4755 cut-off events. [2024-06-21 17:56:25,496 INFO L125 PetriNetUnfolderBase]: For 522223/522223 co-relation queries the response was YES. [2024-06-21 17:56:25,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35464 conditions, 4755 events. 3006/4755 cut-off events. For 522223/522223 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 27688 event pairs, 722 based on Foata normal form. 12/4765 useless extension candidates. Maximal degree in co-relation 35342. Up to 4418 conditions per place. [2024-06-21 17:56:25,541 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 314 selfloop transitions, 39 changer transitions 0/358 dead transitions. [2024-06-21 17:56:25,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 358 transitions, 5365 flow [2024-06-21 17:56:25,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:56:25,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:56:25,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:56:25,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-21 17:56:25,542 INFO L175 Difference]: Start difference. First operand has 264 places, 331 transitions, 4486 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:56:25,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 358 transitions, 5365 flow [2024-06-21 17:56:26,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 358 transitions, 5078 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 17:56:26,139 INFO L231 Difference]: Finished difference. Result has 264 places, 332 transitions, 4303 flow [2024-06-21 17:56:26,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4199, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4303, PETRI_PLACES=264, PETRI_TRANSITIONS=332} [2024-06-21 17:56:26,140 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-21 17:56:26,140 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 332 transitions, 4303 flow [2024-06-21 17:56:26,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:26,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:26,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:26,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 17:56:26,140 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:56:26,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:26,140 INFO L85 PathProgramCache]: Analyzing trace with hash -47246122, now seen corresponding path program 3 times [2024-06-21 17:56:26,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:26,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153188644] [2024-06-21 17:56:26,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:26,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:29,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:29,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153188644] [2024-06-21 17:56:29,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153188644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:29,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:29,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:56:29,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480834041] [2024-06-21 17:56:29,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:29,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:56:29,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:29,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:56:29,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:56:29,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:56:29,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 332 transitions, 4303 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:29,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:29,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:56:29,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:31,480 INFO L124 PetriNetUnfolderBase]: 3050/4842 cut-off events. [2024-06-21 17:56:31,480 INFO L125 PetriNetUnfolderBase]: For 535514/535514 co-relation queries the response was YES. [2024-06-21 17:56:31,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35784 conditions, 4842 events. 3050/4842 cut-off events. For 535514/535514 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 28395 event pairs, 761 based on Foata normal form. 12/4854 useless extension candidates. Maximal degree in co-relation 35661. Up to 4587 conditions per place. [2024-06-21 17:56:31,523 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 332 selfloop transitions, 17 changer transitions 0/354 dead transitions. [2024-06-21 17:56:31,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 354 transitions, 5103 flow [2024-06-21 17:56:31,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:56:31,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:56:31,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 17:56:31,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-21 17:56:31,524 INFO L175 Difference]: Start difference. First operand has 264 places, 332 transitions, 4303 flow. Second operand 8 states and 127 transitions. [2024-06-21 17:56:31,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 354 transitions, 5103 flow [2024-06-21 17:56:32,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 354 transitions, 5021 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:56:32,343 INFO L231 Difference]: Finished difference. Result has 266 places, 333 transitions, 4283 flow [2024-06-21 17:56:32,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4221, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4283, PETRI_PLACES=266, PETRI_TRANSITIONS=333} [2024-06-21 17:56:32,344 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-21 17:56:32,344 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 333 transitions, 4283 flow [2024-06-21 17:56:32,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:32,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:32,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:32,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 17:56:32,345 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:56:32,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:32,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1803458928, now seen corresponding path program 4 times [2024-06-21 17:56:32,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:32,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151734812] [2024-06-21 17:56:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:32,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:35,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:35,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151734812] [2024-06-21 17:56:35,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151734812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:35,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:35,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:56:35,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124552853] [2024-06-21 17:56:35,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:35,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:56:35,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:35,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:56:35,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:56:35,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:56:35,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 333 transitions, 4283 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:35,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:35,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:56:35,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:37,695 INFO L124 PetriNetUnfolderBase]: 3052/4848 cut-off events. [2024-06-21 17:56:37,695 INFO L125 PetriNetUnfolderBase]: For 523221/523221 co-relation queries the response was YES. [2024-06-21 17:56:37,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35558 conditions, 4848 events. 3052/4848 cut-off events. For 523221/523221 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 28429 event pairs, 753 based on Foata normal form. 8/4856 useless extension candidates. Maximal degree in co-relation 35434. Up to 4555 conditions per place. [2024-06-21 17:56:37,739 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 335 selfloop transitions, 20 changer transitions 0/360 dead transitions. [2024-06-21 17:56:37,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 360 transitions, 5129 flow [2024-06-21 17:56:37,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:56:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:56:37,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 17:56:37,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669250645994832 [2024-06-21 17:56:37,740 INFO L175 Difference]: Start difference. First operand has 266 places, 333 transitions, 4283 flow. Second operand 9 states and 142 transitions. [2024-06-21 17:56:37,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 360 transitions, 5129 flow [2024-06-21 17:56:38,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 360 transitions, 5089 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 17:56:38,685 INFO L231 Difference]: Finished difference. Result has 269 places, 334 transitions, 4311 flow [2024-06-21 17:56:38,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4243, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4311, PETRI_PLACES=269, PETRI_TRANSITIONS=334} [2024-06-21 17:56:38,685 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-21 17:56:38,685 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 334 transitions, 4311 flow [2024-06-21 17:56:38,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:38,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:38,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:38,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 17:56:38,686 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:56:38,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:38,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1188061754, now seen corresponding path program 1 times [2024-06-21 17:56:38,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:38,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177124375] [2024-06-21 17:56:38,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:38,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:41,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:41,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177124375] [2024-06-21 17:56:41,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177124375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:41,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:41,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:41,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316961396] [2024-06-21 17:56:41,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:41,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:41,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:41,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:41,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:56:41,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:56:41,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 334 transitions, 4311 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:41,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:41,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:56:41,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:43,493 INFO L124 PetriNetUnfolderBase]: 3012/4864 cut-off events. [2024-06-21 17:56:43,493 INFO L125 PetriNetUnfolderBase]: For 500104/500118 co-relation queries the response was YES. [2024-06-21 17:56:43,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34732 conditions, 4864 events. 3012/4864 cut-off events. For 500104/500118 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 29301 event pairs, 628 based on Foata normal form. 10/4854 useless extension candidates. Maximal degree in co-relation 34607. Up to 4269 conditions per place. [2024-06-21 17:56:43,539 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 292 selfloop transitions, 42 changer transitions 0/370 dead transitions. [2024-06-21 17:56:43,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 370 transitions, 5279 flow [2024-06-21 17:56:43,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:56:43,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:56:43,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 17:56:43,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-21 17:56:43,541 INFO L175 Difference]: Start difference. First operand has 269 places, 334 transitions, 4311 flow. Second operand 7 states and 136 transitions. [2024-06-21 17:56:43,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 370 transitions, 5279 flow [2024-06-21 17:56:44,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 370 transitions, 5227 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 17:56:44,434 INFO L231 Difference]: Finished difference. Result has 269 places, 336 transitions, 4373 flow [2024-06-21 17:56:44,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4259, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4373, PETRI_PLACES=269, PETRI_TRANSITIONS=336} [2024-06-21 17:56:44,434 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-21 17:56:44,434 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 336 transitions, 4373 flow [2024-06-21 17:56:44,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:44,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:44,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:44,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 17:56:44,435 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:56:44,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:44,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1652568838, now seen corresponding path program 2 times [2024-06-21 17:56:44,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:44,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088677367] [2024-06-21 17:56:44,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:44,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:47,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:47,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088677367] [2024-06-21 17:56:47,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088677367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:47,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:47,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:47,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321181885] [2024-06-21 17:56:47,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:47,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:47,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:47,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:47,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:56:47,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:56:47,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 336 transitions, 4373 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:47,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:47,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:56:47,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:49,055 INFO L124 PetriNetUnfolderBase]: 3051/4917 cut-off events. [2024-06-21 17:56:49,055 INFO L125 PetriNetUnfolderBase]: For 528972/528988 co-relation queries the response was YES. [2024-06-21 17:56:49,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35158 conditions, 4917 events. 3051/4917 cut-off events. For 528972/528988 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 29638 event pairs, 660 based on Foata normal form. 16/4910 useless extension candidates. Maximal degree in co-relation 35032. Up to 4443 conditions per place. [2024-06-21 17:56:49,097 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 288 selfloop transitions, 40 changer transitions 0/364 dead transitions. [2024-06-21 17:56:49,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 364 transitions, 5131 flow [2024-06-21 17:56:49,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:56:49,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:56:49,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 17:56:49,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-21 17:56:49,098 INFO L175 Difference]: Start difference. First operand has 269 places, 336 transitions, 4373 flow. Second operand 7 states and 130 transitions. [2024-06-21 17:56:49,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 364 transitions, 5131 flow [2024-06-21 17:56:49,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 364 transitions, 5080 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 17:56:49,924 INFO L231 Difference]: Finished difference. Result has 273 places, 337 transitions, 4424 flow [2024-06-21 17:56:49,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4322, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4424, PETRI_PLACES=273, PETRI_TRANSITIONS=337} [2024-06-21 17:56:49,924 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-21 17:56:49,924 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 337 transitions, 4424 flow [2024-06-21 17:56:49,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:49,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:49,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:49,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 17:56:49,925 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:56:49,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:49,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1979555176, now seen corresponding path program 3 times [2024-06-21 17:56:49,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:49,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178338190] [2024-06-21 17:56:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:49,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:53,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:53,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178338190] [2024-06-21 17:56:53,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178338190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:53,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:53,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:56:53,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392597943] [2024-06-21 17:56:53,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:53,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:56:53,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:53,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:56:53,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:56:53,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:56:53,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 337 transitions, 4424 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:53,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:53,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:56:53,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:55,147 INFO L124 PetriNetUnfolderBase]: 3099/4989 cut-off events. [2024-06-21 17:56:55,147 INFO L125 PetriNetUnfolderBase]: For 542038/542052 co-relation queries the response was YES. [2024-06-21 17:56:55,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35864 conditions, 4989 events. 3099/4989 cut-off events. For 542038/542052 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 30120 event pairs, 677 based on Foata normal form. 16/4984 useless extension candidates. Maximal degree in co-relation 35736. Up to 4519 conditions per place. [2024-06-21 17:56:55,188 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 288 selfloop transitions, 43 changer transitions 0/367 dead transitions. [2024-06-21 17:56:55,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 367 transitions, 5194 flow [2024-06-21 17:56:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:56:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:56:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:56:55,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 17:56:55,189 INFO L175 Difference]: Start difference. First operand has 273 places, 337 transitions, 4424 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:56:55,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 367 transitions, 5194 flow [2024-06-21 17:56:55,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 367 transitions, 5112 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 17:56:55,992 INFO L231 Difference]: Finished difference. Result has 276 places, 338 transitions, 4452 flow [2024-06-21 17:56:55,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4342, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4452, PETRI_PLACES=276, PETRI_TRANSITIONS=338} [2024-06-21 17:56:55,993 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-21 17:56:55,993 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 338 transitions, 4452 flow [2024-06-21 17:56:55,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:55,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:55,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:55,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 17:56:55,993 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:56:55,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:55,994 INFO L85 PathProgramCache]: Analyzing trace with hash 2107767730, now seen corresponding path program 1 times [2024-06-21 17:56:55,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:55,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365596020] [2024-06-21 17:56:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:55,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:59,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:59,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365596020] [2024-06-21 17:56:59,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365596020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:59,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:59,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:56:59,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391644010] [2024-06-21 17:56:59,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:59,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:56:59,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:59,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:56:59,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:56:59,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:56:59,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 338 transitions, 4452 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:59,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:59,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:56:59,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:01,467 INFO L124 PetriNetUnfolderBase]: 3246/5150 cut-off events. [2024-06-21 17:57:01,467 INFO L125 PetriNetUnfolderBase]: For 582495/582497 co-relation queries the response was YES. [2024-06-21 17:57:01,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38505 conditions, 5150 events. 3246/5150 cut-off events. For 582495/582497 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 30390 event pairs, 752 based on Foata normal form. 4/5154 useless extension candidates. Maximal degree in co-relation 38376. Up to 4814 conditions per place. [2024-06-21 17:57:01,509 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 312 selfloop transitions, 45 changer transitions 0/362 dead transitions. [2024-06-21 17:57:01,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 362 transitions, 5284 flow [2024-06-21 17:57:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:01,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:01,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 17:57:01,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-21 17:57:01,510 INFO L175 Difference]: Start difference. First operand has 276 places, 338 transitions, 4452 flow. Second operand 8 states and 133 transitions. [2024-06-21 17:57:01,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 362 transitions, 5284 flow [2024-06-21 17:57:02,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 362 transitions, 5194 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:02,432 INFO L231 Difference]: Finished difference. Result has 278 places, 340 transitions, 4523 flow [2024-06-21 17:57:02,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4362, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4523, PETRI_PLACES=278, PETRI_TRANSITIONS=340} [2024-06-21 17:57:02,432 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-21 17:57:02,432 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 340 transitions, 4523 flow [2024-06-21 17:57:02,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:02,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:02,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:02,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 17:57:02,433 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:02,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:02,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1511507066, now seen corresponding path program 4 times [2024-06-21 17:57:02,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:02,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367222213] [2024-06-21 17:57:02,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:02,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:05,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:05,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367222213] [2024-06-21 17:57:05,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367222213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:05,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:05,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:05,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736030982] [2024-06-21 17:57:05,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:05,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:05,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:05,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:05,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:05,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:57:05,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 340 transitions, 4523 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:05,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:05,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:57:05,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:07,092 INFO L124 PetriNetUnfolderBase]: 3080/4963 cut-off events. [2024-06-21 17:57:07,092 INFO L125 PetriNetUnfolderBase]: For 518358/518370 co-relation queries the response was YES. [2024-06-21 17:57:07,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34867 conditions, 4963 events. 3080/4963 cut-off events. For 518358/518370 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 30094 event pairs, 708 based on Foata normal form. 14/4964 useless extension candidates. Maximal degree in co-relation 34737. Up to 4563 conditions per place. [2024-06-21 17:57:07,147 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 303 selfloop transitions, 24 changer transitions 0/363 dead transitions. [2024-06-21 17:57:07,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 363 transitions, 5253 flow [2024-06-21 17:57:07,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:07,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:07,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:57:07,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-21 17:57:07,149 INFO L175 Difference]: Start difference. First operand has 278 places, 340 transitions, 4523 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:57:07,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 363 transitions, 5253 flow [2024-06-21 17:57:07,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 363 transitions, 5104 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:07,980 INFO L231 Difference]: Finished difference. Result has 280 places, 340 transitions, 4428 flow [2024-06-21 17:57:07,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4374, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4428, PETRI_PLACES=280, PETRI_TRANSITIONS=340} [2024-06-21 17:57:07,980 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-21 17:57:07,981 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 340 transitions, 4428 flow [2024-06-21 17:57:07,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:07,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:07,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:07,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 17:57:07,981 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:07,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:07,981 INFO L85 PathProgramCache]: Analyzing trace with hash -2021560432, now seen corresponding path program 2 times [2024-06-21 17:57:07,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:07,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011802565] [2024-06-21 17:57:07,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:07,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:11,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:11,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011802565] [2024-06-21 17:57:11,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011802565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:11,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:11,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:57:11,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099904750] [2024-06-21 17:57:11,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:11,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:57:11,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:11,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:57:11,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:57:11,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:57:11,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 340 transitions, 4428 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:11,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:11,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:57:11,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:12,872 INFO L124 PetriNetUnfolderBase]: 3221/5101 cut-off events. [2024-06-21 17:57:12,872 INFO L125 PetriNetUnfolderBase]: For 559897/559897 co-relation queries the response was YES. [2024-06-21 17:57:12,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37290 conditions, 5101 events. 3221/5101 cut-off events. For 559897/559897 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 30105 event pairs, 780 based on Foata normal form. 2/5103 useless extension candidates. Maximal degree in co-relation 37159. Up to 4871 conditions per place. [2024-06-21 17:57:12,924 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 331 selfloop transitions, 26 changer transitions 0/362 dead transitions. [2024-06-21 17:57:12,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 362 transitions, 5256 flow [2024-06-21 17:57:12,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:57:12,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:57:12,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 17:57:12,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36175710594315247 [2024-06-21 17:57:12,926 INFO L175 Difference]: Start difference. First operand has 280 places, 340 transitions, 4428 flow. Second operand 9 states and 140 transitions. [2024-06-21 17:57:12,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 362 transitions, 5256 flow [2024-06-21 17:57:13,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 362 transitions, 5199 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:13,936 INFO L231 Difference]: Finished difference. Result has 283 places, 342 transitions, 4498 flow [2024-06-21 17:57:13,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4371, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4498, PETRI_PLACES=283, PETRI_TRANSITIONS=342} [2024-06-21 17:57:13,937 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-21 17:57:13,937 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 342 transitions, 4498 flow [2024-06-21 17:57:13,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:13,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:13,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:13,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 17:57:13,937 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:13,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:13,937 INFO L85 PathProgramCache]: Analyzing trace with hash -262419788, now seen corresponding path program 3 times [2024-06-21 17:57:13,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:13,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027811659] [2024-06-21 17:57:13,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:13,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:17,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:17,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027811659] [2024-06-21 17:57:17,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027811659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:17,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:17,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:57:17,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261041271] [2024-06-21 17:57:17,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:17,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:57:17,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:17,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:57:17,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:57:17,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:57:17,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 342 transitions, 4498 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:17,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:17,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:57:17,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:19,176 INFO L124 PetriNetUnfolderBase]: 3229/5113 cut-off events. [2024-06-21 17:57:19,176 INFO L125 PetriNetUnfolderBase]: For 573916/573916 co-relation queries the response was YES. [2024-06-21 17:57:19,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37565 conditions, 5113 events. 3229/5113 cut-off events. For 573916/573916 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 30172 event pairs, 782 based on Foata normal form. 2/5115 useless extension candidates. Maximal degree in co-relation 37433. Up to 4883 conditions per place. [2024-06-21 17:57:19,230 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 334 selfloop transitions, 26 changer transitions 0/365 dead transitions. [2024-06-21 17:57:19,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 365 transitions, 5338 flow [2024-06-21 17:57:19,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:57:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:57:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-21 17:57:19,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3511627906976744 [2024-06-21 17:57:19,231 INFO L175 Difference]: Start difference. First operand has 283 places, 342 transitions, 4498 flow. Second operand 10 states and 151 transitions. [2024-06-21 17:57:19,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 365 transitions, 5338 flow [2024-06-21 17:57:20,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 365 transitions, 5227 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 17:57:20,275 INFO L231 Difference]: Finished difference. Result has 286 places, 344 transitions, 4518 flow [2024-06-21 17:57:20,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4387, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4518, PETRI_PLACES=286, PETRI_TRANSITIONS=344} [2024-06-21 17:57:20,276 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-21 17:57:20,276 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 344 transitions, 4518 flow [2024-06-21 17:57:20,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:20,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:20,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:20,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 17:57:20,277 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:20,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:20,277 INFO L85 PathProgramCache]: Analyzing trace with hash -32434508, now seen corresponding path program 4 times [2024-06-21 17:57:20,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:20,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313642141] [2024-06-21 17:57:20,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:20,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:23,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:23,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313642141] [2024-06-21 17:57:23,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313642141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:23,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:23,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:57:23,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494349942] [2024-06-21 17:57:23,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:23,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:57:23,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:23,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:57:23,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:57:23,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:57:23,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 344 transitions, 4518 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:23,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:23,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:57:23,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:25,645 INFO L124 PetriNetUnfolderBase]: 3298/5218 cut-off events. [2024-06-21 17:57:25,645 INFO L125 PetriNetUnfolderBase]: For 606963/606963 co-relation queries the response was YES. [2024-06-21 17:57:25,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38680 conditions, 5218 events. 3298/5218 cut-off events. For 606963/606963 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 30775 event pairs, 785 based on Foata normal form. 2/5220 useless extension candidates. Maximal degree in co-relation 38547. Up to 4860 conditions per place. [2024-06-21 17:57:25,700 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 339 selfloop transitions, 31 changer transitions 0/375 dead transitions. [2024-06-21 17:57:25,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 375 transitions, 5619 flow [2024-06-21 17:57:25,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:57:25,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:57:25,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-21 17:57:25,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36511627906976746 [2024-06-21 17:57:25,701 INFO L175 Difference]: Start difference. First operand has 286 places, 344 transitions, 4518 flow. Second operand 10 states and 157 transitions. [2024-06-21 17:57:25,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 375 transitions, 5619 flow [2024-06-21 17:57:27,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 375 transitions, 5504 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-21 17:57:27,102 INFO L231 Difference]: Finished difference. Result has 289 places, 348 transitions, 4591 flow [2024-06-21 17:57:27,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4403, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4591, PETRI_PLACES=289, PETRI_TRANSITIONS=348} [2024-06-21 17:57:27,103 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 245 predicate places. [2024-06-21 17:57:27,103 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 348 transitions, 4591 flow [2024-06-21 17:57:27,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:27,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:27,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:27,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 17:57:27,103 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:27,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:27,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1595764283, now seen corresponding path program 1 times [2024-06-21 17:57:27,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:27,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155099250] [2024-06-21 17:57:27,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:27,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:29,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:29,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155099250] [2024-06-21 17:57:29,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155099250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:29,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:29,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:29,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340187611] [2024-06-21 17:57:29,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:29,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:29,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:29,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:29,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:29,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:57:29,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 348 transitions, 4591 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:29,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:29,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:57:29,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:31,829 INFO L124 PetriNetUnfolderBase]: 3306/5239 cut-off events. [2024-06-21 17:57:31,829 INFO L125 PetriNetUnfolderBase]: For 622664/622664 co-relation queries the response was YES. [2024-06-21 17:57:31,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39015 conditions, 5239 events. 3306/5239 cut-off events. For 622664/622664 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 30983 event pairs, 711 based on Foata normal form. 2/5241 useless extension candidates. Maximal degree in co-relation 38880. Up to 4935 conditions per place. [2024-06-21 17:57:31,885 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 354 selfloop transitions, 29 changer transitions 0/388 dead transitions. [2024-06-21 17:57:31,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 388 transitions, 5699 flow [2024-06-21 17:57:31,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:31,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:31,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:57:31,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 17:57:31,888 INFO L175 Difference]: Start difference. First operand has 289 places, 348 transitions, 4591 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:57:31,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 388 transitions, 5699 flow [2024-06-21 17:57:33,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 388 transitions, 5599 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:33,038 INFO L231 Difference]: Finished difference. Result has 291 places, 352 transitions, 4622 flow [2024-06-21 17:57:33,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4491, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4622, PETRI_PLACES=291, PETRI_TRANSITIONS=352} [2024-06-21 17:57:33,038 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-21 17:57:33,038 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 352 transitions, 4622 flow [2024-06-21 17:57:33,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:33,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:33,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:33,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 17:57:33,039 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:33,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:33,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1587193403, now seen corresponding path program 2 times [2024-06-21 17:57:33,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:33,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869068118] [2024-06-21 17:57:33,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:33,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:35,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:35,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869068118] [2024-06-21 17:57:35,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869068118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:35,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:35,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:35,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490048651] [2024-06-21 17:57:35,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:35,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:35,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:35,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:35,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:35,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:57:35,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 352 transitions, 4622 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:35,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:35,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:57:35,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:37,746 INFO L124 PetriNetUnfolderBase]: 3319/5252 cut-off events. [2024-06-21 17:57:37,747 INFO L125 PetriNetUnfolderBase]: For 635326/635326 co-relation queries the response was YES. [2024-06-21 17:57:37,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39371 conditions, 5252 events. 3319/5252 cut-off events. For 635326/635326 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 31115 event pairs, 826 based on Foata normal form. 2/5254 useless extension candidates. Maximal degree in co-relation 39234. Up to 5004 conditions per place. [2024-06-21 17:57:37,797 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 353 selfloop transitions, 29 changer transitions 0/387 dead transitions. [2024-06-21 17:57:37,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 387 transitions, 5544 flow [2024-06-21 17:57:37,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:37,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:37,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:57:37,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-21 17:57:37,799 INFO L175 Difference]: Start difference. First operand has 291 places, 352 transitions, 4622 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:57:37,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 387 transitions, 5544 flow [2024-06-21 17:57:38,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 387 transitions, 5380 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 17:57:38,913 INFO L231 Difference]: Finished difference. Result has 295 places, 357 transitions, 4597 flow [2024-06-21 17:57:38,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4597, PETRI_PLACES=295, PETRI_TRANSITIONS=357} [2024-06-21 17:57:38,913 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-21 17:57:38,913 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 357 transitions, 4597 flow [2024-06-21 17:57:38,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:38,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:38,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:38,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 17:57:38,914 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:38,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:38,914 INFO L85 PathProgramCache]: Analyzing trace with hash 800880681, now seen corresponding path program 1 times [2024-06-21 17:57:38,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:38,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845911050] [2024-06-21 17:57:38,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:38,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:41,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:41,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845911050] [2024-06-21 17:57:41,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845911050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:41,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:41,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:41,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609779169] [2024-06-21 17:57:41,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:41,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:41,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:41,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:41,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:41,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:57:41,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 357 transitions, 4597 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:41,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:41,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:57:41,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:43,540 INFO L124 PetriNetUnfolderBase]: 3340/5289 cut-off events. [2024-06-21 17:57:43,540 INFO L125 PetriNetUnfolderBase]: For 651940/651940 co-relation queries the response was YES. [2024-06-21 17:57:43,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39877 conditions, 5289 events. 3340/5289 cut-off events. For 651940/651940 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 31424 event pairs, 828 based on Foata normal form. 1/5290 useless extension candidates. Maximal degree in co-relation 39739. Up to 4970 conditions per place. [2024-06-21 17:57:43,587 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 349 selfloop transitions, 49 changer transitions 0/403 dead transitions. [2024-06-21 17:57:43,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 403 transitions, 5805 flow [2024-06-21 17:57:43,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:57:43,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:57:43,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:57:43,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-21 17:57:43,589 INFO L175 Difference]: Start difference. First operand has 295 places, 357 transitions, 4597 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:57:43,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 403 transitions, 5805 flow [2024-06-21 17:57:44,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 403 transitions, 5734 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 17:57:44,445 INFO L231 Difference]: Finished difference. Result has 300 places, 363 transitions, 4771 flow [2024-06-21 17:57:44,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4526, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4771, PETRI_PLACES=300, PETRI_TRANSITIONS=363} [2024-06-21 17:57:44,445 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-21 17:57:44,445 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 363 transitions, 4771 flow [2024-06-21 17:57:44,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:44,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:44,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:44,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 17:57:44,446 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:44,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:44,446 INFO L85 PathProgramCache]: Analyzing trace with hash -2011335543, now seen corresponding path program 3 times [2024-06-21 17:57:44,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:44,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845619764] [2024-06-21 17:57:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:44,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:47,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:47,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845619764] [2024-06-21 17:57:47,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845619764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:47,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:47,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:47,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475746883] [2024-06-21 17:57:47,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:47,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:47,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:47,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:47,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:47,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:57:47,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 363 transitions, 4771 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:47,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:47,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:57:47,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:49,279 INFO L124 PetriNetUnfolderBase]: 3348/5305 cut-off events. [2024-06-21 17:57:49,279 INFO L125 PetriNetUnfolderBase]: For 673346/673346 co-relation queries the response was YES. [2024-06-21 17:57:49,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40686 conditions, 5305 events. 3348/5305 cut-off events. For 673346/673346 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 31579 event pairs, 834 based on Foata normal form. 2/5307 useless extension candidates. Maximal degree in co-relation 40546. Up to 5045 conditions per place. [2024-06-21 17:57:49,325 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 355 selfloop transitions, 29 changer transitions 0/389 dead transitions. [2024-06-21 17:57:49,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 389 transitions, 5654 flow [2024-06-21 17:57:49,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:49,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:49,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:57:49,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-21 17:57:49,326 INFO L175 Difference]: Start difference. First operand has 300 places, 363 transitions, 4771 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:57:49,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 389 transitions, 5654 flow [2024-06-21 17:57:50,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 389 transitions, 5510 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-21 17:57:50,310 INFO L231 Difference]: Finished difference. Result has 305 places, 366 transitions, 4754 flow [2024-06-21 17:57:50,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4629, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4754, PETRI_PLACES=305, PETRI_TRANSITIONS=366} [2024-06-21 17:57:50,310 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-21 17:57:50,311 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 366 transitions, 4754 flow [2024-06-21 17:57:50,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:50,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:50,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:50,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 17:57:50,311 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:50,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:50,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1081810985, now seen corresponding path program 2 times [2024-06-21 17:57:50,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:50,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147993686] [2024-06-21 17:57:50,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:50,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:53,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:53,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147993686] [2024-06-21 17:57:53,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147993686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:53,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:53,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:53,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818031281] [2024-06-21 17:57:53,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:53,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:53,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:53,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:53,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:53,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:57:53,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 366 transitions, 4754 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:53,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:53,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:57:53,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:55,198 INFO L124 PetriNetUnfolderBase]: 3361/5336 cut-off events. [2024-06-21 17:57:55,199 INFO L125 PetriNetUnfolderBase]: For 687481/687483 co-relation queries the response was YES. [2024-06-21 17:57:55,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41133 conditions, 5336 events. 3361/5336 cut-off events. For 687481/687483 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 31744 event pairs, 711 based on Foata normal form. 3/5339 useless extension candidates. Maximal degree in co-relation 40990. Up to 4445 conditions per place. [2024-06-21 17:57:55,246 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 284 selfloop transitions, 121 changer transitions 0/410 dead transitions. [2024-06-21 17:57:55,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 410 transitions, 6302 flow [2024-06-21 17:57:55,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:55,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:55,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 17:57:55,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 17:57:55,248 INFO L175 Difference]: Start difference. First operand has 305 places, 366 transitions, 4754 flow. Second operand 8 states and 150 transitions. [2024-06-21 17:57:55,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 410 transitions, 6302 flow [2024-06-21 17:57:56,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 410 transitions, 6111 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 17:57:56,172 INFO L231 Difference]: Finished difference. Result has 308 places, 375 transitions, 5140 flow [2024-06-21 17:57:56,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4577, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5140, PETRI_PLACES=308, PETRI_TRANSITIONS=375} [2024-06-21 17:57:56,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-21 17:57:56,173 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 375 transitions, 5140 flow [2024-06-21 17:57:56,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:56,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:56,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:56,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 17:57:56,173 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:57:56,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:56,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1092286505, now seen corresponding path program 3 times [2024-06-21 17:57:56,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:56,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290195240] [2024-06-21 17:57:56,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:56,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:59,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:59,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290195240] [2024-06-21 17:57:59,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290195240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:59,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:59,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:59,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384225092] [2024-06-21 17:57:59,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:59,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:59,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:59,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:59,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:59,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:57:59,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 375 transitions, 5140 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:59,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:59,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:57:59,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:01,282 INFO L124 PetriNetUnfolderBase]: 3366/5345 cut-off events. [2024-06-21 17:58:01,282 INFO L125 PetriNetUnfolderBase]: For 704730/704732 co-relation queries the response was YES. [2024-06-21 17:58:01,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41941 conditions, 5345 events. 3366/5345 cut-off events. For 704730/704732 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31884 event pairs, 705 based on Foata normal form. 3/5348 useless extension candidates. Maximal degree in co-relation 41797. Up to 4449 conditions per place. [2024-06-21 17:58:01,332 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 281 selfloop transitions, 123 changer transitions 0/409 dead transitions. [2024-06-21 17:58:01,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 409 transitions, 6554 flow [2024-06-21 17:58:01,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:01,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 17:58:01,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-21 17:58:01,333 INFO L175 Difference]: Start difference. First operand has 308 places, 375 transitions, 5140 flow. Second operand 8 states and 146 transitions. [2024-06-21 17:58:01,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 409 transitions, 6554 flow [2024-06-21 17:58:02,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 409 transitions, 6359 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:02,635 INFO L231 Difference]: Finished difference. Result has 313 places, 378 transitions, 5289 flow [2024-06-21 17:58:02,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4973, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5289, PETRI_PLACES=313, PETRI_TRANSITIONS=378} [2024-06-21 17:58:02,635 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 269 predicate places. [2024-06-21 17:58:02,635 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 378 transitions, 5289 flow [2024-06-21 17:58:02,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:02,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:02,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:02,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 17:58:02,636 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:02,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:02,636 INFO L85 PathProgramCache]: Analyzing trace with hash -105388699, now seen corresponding path program 4 times [2024-06-21 17:58:02,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:02,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799575191] [2024-06-21 17:58:02,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:02,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:05,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:05,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799575191] [2024-06-21 17:58:05,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799575191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:05,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:05,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:05,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708124020] [2024-06-21 17:58:05,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:05,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:05,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:05,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:05,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:05,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:58:05,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 378 transitions, 5289 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:05,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:05,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:58:05,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:07,477 INFO L124 PetriNetUnfolderBase]: 3387/5369 cut-off events. [2024-06-21 17:58:07,477 INFO L125 PetriNetUnfolderBase]: For 726463/726463 co-relation queries the response was YES. [2024-06-21 17:58:07,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42422 conditions, 5369 events. 3387/5369 cut-off events. For 726463/726463 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 32097 event pairs, 833 based on Foata normal form. 1/5370 useless extension candidates. Maximal degree in co-relation 42276. Up to 5069 conditions per place. [2024-06-21 17:58:07,537 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 361 selfloop transitions, 43 changer transitions 0/409 dead transitions. [2024-06-21 17:58:07,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 409 transitions, 6478 flow [2024-06-21 17:58:07,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:07,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 17:58:07,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-21 17:58:07,538 INFO L175 Difference]: Start difference. First operand has 313 places, 378 transitions, 5289 flow. Second operand 9 states and 148 transitions. [2024-06-21 17:58:07,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 409 transitions, 6478 flow [2024-06-21 17:58:09,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 409 transitions, 6209 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:09,413 INFO L231 Difference]: Finished difference. Result has 318 places, 384 transitions, 5258 flow [2024-06-21 17:58:09,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5029, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5258, PETRI_PLACES=318, PETRI_TRANSITIONS=384} [2024-06-21 17:58:09,413 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-21 17:58:09,413 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 384 transitions, 5258 flow [2024-06-21 17:58:09,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:09,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:09,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:09,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 17:58:09,414 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:09,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:09,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1305210494, now seen corresponding path program 1 times [2024-06-21 17:58:09,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:09,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731763049] [2024-06-21 17:58:09,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:09,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:11,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:11,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731763049] [2024-06-21 17:58:11,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731763049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:11,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:11,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:11,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361382682] [2024-06-21 17:58:11,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:11,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:11,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:11,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:11,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:11,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:58:11,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 384 transitions, 5258 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:11,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:11,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:58:11,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:14,063 INFO L124 PetriNetUnfolderBase]: 3503/5543 cut-off events. [2024-06-21 17:58:14,064 INFO L125 PetriNetUnfolderBase]: For 807532/807538 co-relation queries the response was YES. [2024-06-21 17:58:14,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44494 conditions, 5543 events. 3503/5543 cut-off events. For 807532/807538 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 33100 event pairs, 730 based on Foata normal form. 10/5553 useless extension candidates. Maximal degree in co-relation 44346. Up to 4544 conditions per place. [2024-06-21 17:58:14,124 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 273 selfloop transitions, 154 changer transitions 0/432 dead transitions. [2024-06-21 17:58:14,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 432 transitions, 6792 flow [2024-06-21 17:58:14,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:14,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:14,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 17:58:14,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-21 17:58:14,126 INFO L175 Difference]: Start difference. First operand has 318 places, 384 transitions, 5258 flow. Second operand 8 states and 153 transitions. [2024-06-21 17:58:14,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 432 transitions, 6792 flow [2024-06-21 17:58:15,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 432 transitions, 6661 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:15,949 INFO L231 Difference]: Finished difference. Result has 320 places, 396 transitions, 5647 flow [2024-06-21 17:58:15,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5127, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5647, PETRI_PLACES=320, PETRI_TRANSITIONS=396} [2024-06-21 17:58:15,950 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-21 17:58:15,950 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 396 transitions, 5647 flow [2024-06-21 17:58:15,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:15,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:15,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:15,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 17:58:15,950 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:15,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:15,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1359046696, now seen corresponding path program 2 times [2024-06-21 17:58:15,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:15,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357352959] [2024-06-21 17:58:15,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:15,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:18,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:18,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357352959] [2024-06-21 17:58:18,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357352959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:18,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:18,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:18,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248633515] [2024-06-21 17:58:18,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:18,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:18,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:18,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:18,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:18,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:58:18,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 396 transitions, 5647 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:18,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:18,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:58:18,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:21,149 INFO L124 PetriNetUnfolderBase]: 3555/5616 cut-off events. [2024-06-21 17:58:21,149 INFO L125 PetriNetUnfolderBase]: For 847816/847818 co-relation queries the response was YES. [2024-06-21 17:58:21,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46096 conditions, 5616 events. 3555/5616 cut-off events. For 847816/847818 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 33480 event pairs, 753 based on Foata normal form. 6/5622 useless extension candidates. Maximal degree in co-relation 45947. Up to 4584 conditions per place. [2024-06-21 17:58:21,218 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 281 selfloop transitions, 154 changer transitions 0/440 dead transitions. [2024-06-21 17:58:21,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 440 transitions, 7117 flow [2024-06-21 17:58:21,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 17:58:21,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 17:58:21,220 INFO L175 Difference]: Start difference. First operand has 320 places, 396 transitions, 5647 flow. Second operand 9 states and 168 transitions. [2024-06-21 17:58:21,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 440 transitions, 7117 flow [2024-06-21 17:58:23,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 440 transitions, 6923 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:23,256 INFO L231 Difference]: Finished difference. Result has 325 places, 402 transitions, 5885 flow [2024-06-21 17:58:23,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5463, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5885, PETRI_PLACES=325, PETRI_TRANSITIONS=402} [2024-06-21 17:58:23,256 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-21 17:58:23,256 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 402 transitions, 5885 flow [2024-06-21 17:58:23,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:23,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:23,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:23,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 17:58:23,257 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:23,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:23,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1359052276, now seen corresponding path program 3 times [2024-06-21 17:58:23,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:23,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824617301] [2024-06-21 17:58:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:23,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:26,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:26,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824617301] [2024-06-21 17:58:26,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824617301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:26,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:26,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:26,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900404163] [2024-06-21 17:58:26,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:26,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:26,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:26,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:26,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:26,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:58:26,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 402 transitions, 5885 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:26,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:26,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:58:26,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:28,854 INFO L124 PetriNetUnfolderBase]: 3543/5602 cut-off events. [2024-06-21 17:58:28,854 INFO L125 PetriNetUnfolderBase]: For 848467/848469 co-relation queries the response was YES. [2024-06-21 17:58:28,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45825 conditions, 5602 events. 3543/5602 cut-off events. For 848467/848469 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 33412 event pairs, 754 based on Foata normal form. 6/5608 useless extension candidates. Maximal degree in co-relation 45675. Up to 4576 conditions per place. [2024-06-21 17:58:28,921 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 282 selfloop transitions, 155 changer transitions 0/442 dead transitions. [2024-06-21 17:58:28,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 442 transitions, 7055 flow [2024-06-21 17:58:28,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:58:28,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:58:28,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-21 17:58:28,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40169133192389006 [2024-06-21 17:58:28,922 INFO L175 Difference]: Start difference. First operand has 325 places, 402 transitions, 5885 flow. Second operand 11 states and 190 transitions. [2024-06-21 17:58:28,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 442 transitions, 7055 flow [2024-06-21 17:58:30,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 442 transitions, 6693 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:30,996 INFO L231 Difference]: Finished difference. Result has 330 places, 402 transitions, 5839 flow [2024-06-21 17:58:30,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5523, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5839, PETRI_PLACES=330, PETRI_TRANSITIONS=402} [2024-06-21 17:58:30,997 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-21 17:58:30,997 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 402 transitions, 5839 flow [2024-06-21 17:58:30,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:30,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:30,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:30,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 17:58:30,997 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:30,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:30,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1157393504, now seen corresponding path program 4 times [2024-06-21 17:58:30,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:30,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687759920] [2024-06-21 17:58:30,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:30,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:33,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:33,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687759920] [2024-06-21 17:58:33,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687759920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:33,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:33,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:33,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159637849] [2024-06-21 17:58:33,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:33,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:33,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:33,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:33,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:33,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:58:33,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 402 transitions, 5839 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:33,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:33,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:58:33,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:35,577 INFO L124 PetriNetUnfolderBase]: 3583/5635 cut-off events. [2024-06-21 17:58:35,577 INFO L125 PetriNetUnfolderBase]: For 883263/883263 co-relation queries the response was YES. [2024-06-21 17:58:35,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46137 conditions, 5635 events. 3583/5635 cut-off events. For 883263/883263 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 33499 event pairs, 814 based on Foata normal form. 8/5643 useless extension candidates. Maximal degree in co-relation 45986. Up to 5185 conditions per place. [2024-06-21 17:58:35,644 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 363 selfloop transitions, 75 changer transitions 0/443 dead transitions. [2024-06-21 17:58:35,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 443 transitions, 7137 flow [2024-06-21 17:58:35,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:58:35,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:58:35,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 17:58:35,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-21 17:58:35,647 INFO L175 Difference]: Start difference. First operand has 330 places, 402 transitions, 5839 flow. Second operand 10 states and 173 transitions. [2024-06-21 17:58:35,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 443 transitions, 7137 flow [2024-06-21 17:58:37,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 443 transitions, 6809 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 17:58:37,609 INFO L231 Difference]: Finished difference. Result has 330 places, 408 transitions, 5765 flow [2024-06-21 17:58:37,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5521, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5765, PETRI_PLACES=330, PETRI_TRANSITIONS=408} [2024-06-21 17:58:37,609 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-21 17:58:37,609 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 408 transitions, 5765 flow [2024-06-21 17:58:37,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:37,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:37,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:37,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 17:58:37,610 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:37,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:37,611 INFO L85 PathProgramCache]: Analyzing trace with hash -105381600, now seen corresponding path program 5 times [2024-06-21 17:58:37,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:37,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713933101] [2024-06-21 17:58:37,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:37,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:40,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:40,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713933101] [2024-06-21 17:58:40,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713933101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:40,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:40,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:40,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529172057] [2024-06-21 17:58:40,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:40,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:40,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:40,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:40,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:40,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:58:40,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 408 transitions, 5765 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:40,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:40,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:58:40,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:42,007 INFO L124 PetriNetUnfolderBase]: 3559/5603 cut-off events. [2024-06-21 17:58:42,007 INFO L125 PetriNetUnfolderBase]: For 857236/857236 co-relation queries the response was YES. [2024-06-21 17:58:42,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44908 conditions, 5603 events. 3559/5603 cut-off events. For 857236/857236 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 33346 event pairs, 810 based on Foata normal form. 8/5611 useless extension candidates. Maximal degree in co-relation 44756. Up to 5169 conditions per place. [2024-06-21 17:58:42,070 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 364 selfloop transitions, 72 changer transitions 0/441 dead transitions. [2024-06-21 17:58:42,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 441 transitions, 6767 flow [2024-06-21 17:58:42,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:42,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:42,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 17:58:42,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-21 17:58:42,072 INFO L175 Difference]: Start difference. First operand has 330 places, 408 transitions, 5765 flow. Second operand 9 states and 160 transitions. [2024-06-21 17:58:42,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 441 transitions, 6767 flow [2024-06-21 17:58:44,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 441 transitions, 6627 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 17:58:44,232 INFO L231 Difference]: Finished difference. Result has 332 places, 408 transitions, 5779 flow [2024-06-21 17:58:44,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5625, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5779, PETRI_PLACES=332, PETRI_TRANSITIONS=408} [2024-06-21 17:58:44,233 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-21 17:58:44,233 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 408 transitions, 5779 flow [2024-06-21 17:58:44,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:44,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:44,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:44,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 17:58:44,233 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:44,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:44,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1782405675, now seen corresponding path program 4 times [2024-06-21 17:58:44,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:44,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973603479] [2024-06-21 17:58:44,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:44,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:47,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:47,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973603479] [2024-06-21 17:58:47,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973603479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:47,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:47,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:47,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378323400] [2024-06-21 17:58:47,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:47,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:47,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:47,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:47,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:47,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:58:47,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 408 transitions, 5779 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:47,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:47,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:58:47,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:49,319 INFO L124 PetriNetUnfolderBase]: 3554/5586 cut-off events. [2024-06-21 17:58:49,320 INFO L125 PetriNetUnfolderBase]: For 833772/833772 co-relation queries the response was YES. [2024-06-21 17:58:49,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44793 conditions, 5586 events. 3554/5586 cut-off events. For 833772/833772 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 33284 event pairs, 885 based on Foata normal form. 2/5586 useless extension candidates. Maximal degree in co-relation 44640. Up to 5332 conditions per place. [2024-06-21 17:58:49,374 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 389 selfloop transitions, 29 changer transitions 0/423 dead transitions. [2024-06-21 17:58:49,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 423 transitions, 6657 flow [2024-06-21 17:58:49,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:49,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:49,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 17:58:49,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-21 17:58:49,375 INFO L175 Difference]: Start difference. First operand has 332 places, 408 transitions, 5779 flow. Second operand 8 states and 124 transitions. [2024-06-21 17:58:49,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 423 transitions, 6657 flow [2024-06-21 17:58:51,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 423 transitions, 6437 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 17:58:51,493 INFO L231 Difference]: Finished difference. Result has 330 places, 408 transitions, 5622 flow [2024-06-21 17:58:51,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5559, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5622, PETRI_PLACES=330, PETRI_TRANSITIONS=408} [2024-06-21 17:58:51,493 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-21 17:58:51,493 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 408 transitions, 5622 flow [2024-06-21 17:58:51,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:51,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:51,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:51,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 17:58:51,494 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:51,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:51,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1488660439, now seen corresponding path program 5 times [2024-06-21 17:58:51,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:51,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609238477] [2024-06-21 17:58:51,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:51,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:54,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:54,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609238477] [2024-06-21 17:58:54,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609238477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:54,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:54,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:54,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095303801] [2024-06-21 17:58:54,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:54,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:54,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:54,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:54,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:54,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:58:54,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 408 transitions, 5622 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:54,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:54,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:58:54,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:56,594 INFO L124 PetriNetUnfolderBase]: 3559/5601 cut-off events. [2024-06-21 17:58:56,594 INFO L125 PetriNetUnfolderBase]: For 844892/844894 co-relation queries the response was YES. [2024-06-21 17:58:56,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44810 conditions, 5601 events. 3559/5601 cut-off events. For 844892/844894 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 33392 event pairs, 857 based on Foata normal form. 3/5602 useless extension candidates. Maximal degree in co-relation 44656. Up to 4705 conditions per place. [2024-06-21 17:58:56,661 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 298 selfloop transitions, 141 changer transitions 0/444 dead transitions. [2024-06-21 17:58:56,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 444 transitions, 7384 flow [2024-06-21 17:58:56,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:56,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:58:56,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 17:58:56,663 INFO L175 Difference]: Start difference. First operand has 330 places, 408 transitions, 5622 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:58:56,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 444 transitions, 7384 flow [2024-06-21 17:58:59,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 444 transitions, 7251 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 17:58:59,109 INFO L231 Difference]: Finished difference. Result has 329 places, 414 transitions, 5971 flow [2024-06-21 17:58:59,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5489, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5971, PETRI_PLACES=329, PETRI_TRANSITIONS=414} [2024-06-21 17:58:59,109 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-21 17:58:59,109 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 414 transitions, 5971 flow [2024-06-21 17:58:59,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:59,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:59,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:59,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 17:58:59,110 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:59,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:59,111 INFO L85 PathProgramCache]: Analyzing trace with hash 502480751, now seen corresponding path program 6 times [2024-06-21 17:58:59,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:59,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294320116] [2024-06-21 17:58:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:59,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:01,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:01,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294320116] [2024-06-21 17:59:01,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294320116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:01,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:01,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:01,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024335043] [2024-06-21 17:59:01,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:01,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:01,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:01,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:01,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:01,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:59:01,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 414 transitions, 5971 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:01,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:01,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:59:01,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:04,023 INFO L124 PetriNetUnfolderBase]: 3564/5610 cut-off events. [2024-06-21 17:59:04,023 INFO L125 PetriNetUnfolderBase]: For 864253/864255 co-relation queries the response was YES. [2024-06-21 17:59:04,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45326 conditions, 5610 events. 3564/5610 cut-off events. For 864253/864255 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 33506 event pairs, 857 based on Foata normal form. 3/5611 useless extension candidates. Maximal degree in co-relation 45173. Up to 4709 conditions per place. [2024-06-21 17:59:04,090 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 297 selfloop transitions, 142 changer transitions 0/444 dead transitions. [2024-06-21 17:59:04,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 444 transitions, 7641 flow [2024-06-21 17:59:04,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:04,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:04,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 17:59:04,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-21 17:59:04,092 INFO L175 Difference]: Start difference. First operand has 329 places, 414 transitions, 5971 flow. Second operand 8 states and 142 transitions. [2024-06-21 17:59:04,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 444 transitions, 7641 flow [2024-06-21 17:59:06,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 444 transitions, 7402 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:06,692 INFO L231 Difference]: Finished difference. Result has 333 places, 417 transitions, 6124 flow [2024-06-21 17:59:06,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5766, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6124, PETRI_PLACES=333, PETRI_TRANSITIONS=417} [2024-06-21 17:59:06,693 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-21 17:59:06,693 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 417 transitions, 6124 flow [2024-06-21 17:59:06,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:06,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:06,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:06,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 17:59:06,693 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:06,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:06,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1829214249, now seen corresponding path program 7 times [2024-06-21 17:59:06,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:06,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754748947] [2024-06-21 17:59:06,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:06,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:09,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:09,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754748947] [2024-06-21 17:59:09,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754748947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:09,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:09,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:09,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828793514] [2024-06-21 17:59:09,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:09,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:09,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:09,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:09,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:09,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:59:09,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 417 transitions, 6124 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:09,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:09,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:59:09,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:11,679 INFO L124 PetriNetUnfolderBase]: 3569/5619 cut-off events. [2024-06-21 17:59:11,679 INFO L125 PetriNetUnfolderBase]: For 880120/880122 co-relation queries the response was YES. [2024-06-21 17:59:11,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45785 conditions, 5619 events. 3569/5619 cut-off events. For 880120/880122 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 33547 event pairs, 861 based on Foata normal form. 3/5620 useless extension candidates. Maximal degree in co-relation 45630. Up to 4713 conditions per place. [2024-06-21 17:59:11,736 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 288 selfloop transitions, 148 changer transitions 0/441 dead transitions. [2024-06-21 17:59:11,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 441 transitions, 7540 flow [2024-06-21 17:59:11,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:11,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 17:59:11,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 17:59:11,738 INFO L175 Difference]: Start difference. First operand has 333 places, 417 transitions, 6124 flow. Second operand 8 states and 136 transitions. [2024-06-21 17:59:11,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 441 transitions, 7540 flow [2024-06-21 17:59:13,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 441 transitions, 7224 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:13,836 INFO L231 Difference]: Finished difference. Result has 336 places, 420 transitions, 6184 flow [2024-06-21 17:59:13,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5811, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6184, PETRI_PLACES=336, PETRI_TRANSITIONS=420} [2024-06-21 17:59:13,836 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-21 17:59:13,836 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 420 transitions, 6184 flow [2024-06-21 17:59:13,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:13,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:13,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:13,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 17:59:13,836 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:13,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:13,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1629421861, now seen corresponding path program 8 times [2024-06-21 17:59:13,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:13,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997074404] [2024-06-21 17:59:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:13,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:16,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:16,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997074404] [2024-06-21 17:59:16,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997074404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:16,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:16,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:16,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288380520] [2024-06-21 17:59:16,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:16,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:16,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:16,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:16,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:16,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:59:16,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 420 transitions, 6184 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:16,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:16,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:59:16,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:18,614 INFO L124 PetriNetUnfolderBase]: 3582/5631 cut-off events. [2024-06-21 17:59:18,614 INFO L125 PetriNetUnfolderBase]: For 898281/898281 co-relation queries the response was YES. [2024-06-21 17:59:18,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46167 conditions, 5631 events. 3582/5631 cut-off events. For 898281/898281 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33584 event pairs, 876 based on Foata normal form. 1/5630 useless extension candidates. Maximal degree in co-relation 46011. Up to 5274 conditions per place. [2024-06-21 17:59:18,678 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 372 selfloop transitions, 66 changer transitions 0/443 dead transitions. [2024-06-21 17:59:18,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 443 transitions, 7593 flow [2024-06-21 17:59:18,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:59:18,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:59:18,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-21 17:59:18,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697674418604651 [2024-06-21 17:59:18,680 INFO L175 Difference]: Start difference. First operand has 336 places, 420 transitions, 6184 flow. Second operand 10 states and 159 transitions. [2024-06-21 17:59:18,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 443 transitions, 7593 flow [2024-06-21 17:59:20,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 443 transitions, 7252 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:20,979 INFO L231 Difference]: Finished difference. Result has 342 places, 423 transitions, 6070 flow [2024-06-21 17:59:20,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5849, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6070, PETRI_PLACES=342, PETRI_TRANSITIONS=423} [2024-06-21 17:59:20,979 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-21 17:59:20,979 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 423 transitions, 6070 flow [2024-06-21 17:59:20,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:20,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:20,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:20,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 17:59:20,980 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:20,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:20,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1317856717, now seen corresponding path program 9 times [2024-06-21 17:59:20,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:20,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958394115] [2024-06-21 17:59:20,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:20,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:23,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:23,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958394115] [2024-06-21 17:59:23,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958394115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:23,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:23,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:23,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054723942] [2024-06-21 17:59:23,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:23,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:23,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:23,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:23,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:23,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:59:23,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 423 transitions, 6070 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:23,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:23,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:59:23,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:25,669 INFO L124 PetriNetUnfolderBase]: 3579/5625 cut-off events. [2024-06-21 17:59:25,670 INFO L125 PetriNetUnfolderBase]: For 908780/908780 co-relation queries the response was YES. [2024-06-21 17:59:25,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45846 conditions, 5625 events. 3579/5625 cut-off events. For 908780/908780 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 33516 event pairs, 878 based on Foata normal form. 1/5624 useless extension candidates. Maximal degree in co-relation 45688. Up to 5272 conditions per place. [2024-06-21 17:59:25,735 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 365 selfloop transitions, 70 changer transitions 0/440 dead transitions. [2024-06-21 17:59:25,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 440 transitions, 7196 flow [2024-06-21 17:59:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:25,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 17:59:25,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669250645994832 [2024-06-21 17:59:25,737 INFO L175 Difference]: Start difference. First operand has 342 places, 423 transitions, 6070 flow. Second operand 9 states and 142 transitions. [2024-06-21 17:59:25,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 440 transitions, 7196 flow [2024-06-21 17:59:28,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 440 transitions, 6968 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-21 17:59:28,134 INFO L231 Difference]: Finished difference. Result has 343 places, 423 transitions, 5988 flow [2024-06-21 17:59:28,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5842, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5988, PETRI_PLACES=343, PETRI_TRANSITIONS=423} [2024-06-21 17:59:28,134 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-21 17:59:28,135 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 423 transitions, 5988 flow [2024-06-21 17:59:28,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:28,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:28,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:28,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 17:59:28,135 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:28,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:28,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1889558868, now seen corresponding path program 6 times [2024-06-21 17:59:28,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:28,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794933413] [2024-06-21 17:59:28,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:28,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:30,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:30,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794933413] [2024-06-21 17:59:30,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794933413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:30,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:30,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:30,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434880916] [2024-06-21 17:59:30,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:30,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:30,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:30,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:30,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:30,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:59:30,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 423 transitions, 5988 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:30,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:30,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:59:30,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:33,716 INFO L124 PetriNetUnfolderBase]: 3631/5724 cut-off events. [2024-06-21 17:59:33,716 INFO L125 PetriNetUnfolderBase]: For 963701/963703 co-relation queries the response was YES. [2024-06-21 17:59:33,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46824 conditions, 5724 events. 3631/5724 cut-off events. For 963701/963703 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 34126 event pairs, 882 based on Foata normal form. 6/5729 useless extension candidates. Maximal degree in co-relation 46665. Up to 4664 conditions per place. [2024-06-21 17:59:33,775 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 287 selfloop transitions, 174 changer transitions 0/466 dead transitions. [2024-06-21 17:59:33,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 466 transitions, 7538 flow [2024-06-21 17:59:33,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:59:33,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:59:33,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-21 17:59:33,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39112050739957716 [2024-06-21 17:59:33,776 INFO L175 Difference]: Start difference. First operand has 343 places, 423 transitions, 5988 flow. Second operand 11 states and 185 transitions. [2024-06-21 17:59:33,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 466 transitions, 7538 flow [2024-06-21 17:59:36,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 466 transitions, 7341 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 17:59:36,156 INFO L231 Difference]: Finished difference. Result has 345 places, 429 transitions, 6253 flow [2024-06-21 17:59:36,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5791, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6253, PETRI_PLACES=345, PETRI_TRANSITIONS=429} [2024-06-21 17:59:36,157 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-21 17:59:36,157 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 429 transitions, 6253 flow [2024-06-21 17:59:36,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:36,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:36,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:36,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 17:59:36,157 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:36,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:36,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1889553288, now seen corresponding path program 7 times [2024-06-21 17:59:36,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:36,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663882097] [2024-06-21 17:59:36,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:36,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:38,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:38,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663882097] [2024-06-21 17:59:38,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663882097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:38,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:38,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:38,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160495662] [2024-06-21 17:59:38,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:38,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:38,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:38,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:38,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:38,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:59:38,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 429 transitions, 6253 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:38,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:38,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:59:38,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:41,318 INFO L124 PetriNetUnfolderBase]: 3619/5706 cut-off events. [2024-06-21 17:59:41,318 INFO L125 PetriNetUnfolderBase]: For 961664/961666 co-relation queries the response was YES. [2024-06-21 17:59:41,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46987 conditions, 5706 events. 3619/5706 cut-off events. For 961664/961666 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 34056 event pairs, 876 based on Foata normal form. 6/5711 useless extension candidates. Maximal degree in co-relation 46827. Up to 4656 conditions per place. [2024-06-21 17:59:41,386 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 284 selfloop transitions, 173 changer transitions 0/462 dead transitions. [2024-06-21 17:59:41,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 462 transitions, 7469 flow [2024-06-21 17:59:41,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:41,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:41,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 17:59:41,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-21 17:59:41,388 INFO L175 Difference]: Start difference. First operand has 345 places, 429 transitions, 6253 flow. Second operand 9 states and 161 transitions. [2024-06-21 17:59:41,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 462 transitions, 7469 flow [2024-06-21 17:59:44,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 462 transitions, 7059 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-21 17:59:44,310 INFO L231 Difference]: Finished difference. Result has 346 places, 429 transitions, 6195 flow [2024-06-21 17:59:44,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5843, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6195, PETRI_PLACES=346, PETRI_TRANSITIONS=429} [2024-06-21 17:59:44,310 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-21 17:59:44,310 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 429 transitions, 6195 flow [2024-06-21 17:59:44,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:44,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:44,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:44,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 17:59:44,310 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:44,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:44,311 INFO L85 PathProgramCache]: Analyzing trace with hash -222110622, now seen corresponding path program 8 times [2024-06-21 17:59:44,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:44,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901956808] [2024-06-21 17:59:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:44,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:46,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:46,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901956808] [2024-06-21 17:59:46,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901956808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:46,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:46,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:46,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205392218] [2024-06-21 17:59:46,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:46,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:46,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:46,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:46,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:46,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:59:46,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 429 transitions, 6195 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:46,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:46,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:59:46,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:49,015 INFO L124 PetriNetUnfolderBase]: 3639/5737 cut-off events. [2024-06-21 17:59:49,015 INFO L125 PetriNetUnfolderBase]: For 977390/977398 co-relation queries the response was YES. [2024-06-21 17:59:49,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47193 conditions, 5737 events. 3639/5737 cut-off events. For 977390/977398 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 34317 event pairs, 774 based on Foata normal form. 12/5748 useless extension candidates. Maximal degree in co-relation 47032. Up to 4672 conditions per place. [2024-06-21 17:59:49,081 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 291 selfloop transitions, 169 changer transitions 0/465 dead transitions. [2024-06-21 17:59:49,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 465 transitions, 7721 flow [2024-06-21 17:59:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:49,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:49,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 17:59:49,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-21 17:59:49,082 INFO L175 Difference]: Start difference. First operand has 346 places, 429 transitions, 6195 flow. Second operand 8 states and 147 transitions. [2024-06-21 17:59:49,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 465 transitions, 7721 flow [2024-06-21 17:59:51,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 465 transitions, 7487 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:59:51,719 INFO L231 Difference]: Finished difference. Result has 347 places, 433 transitions, 6393 flow [2024-06-21 17:59:51,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5965, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6393, PETRI_PLACES=347, PETRI_TRANSITIONS=433} [2024-06-21 17:59:51,720 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-21 17:59:51,720 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 433 transitions, 6393 flow [2024-06-21 17:59:51,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:51,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:51,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:51,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 17:59:51,720 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:51,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:51,721 INFO L85 PathProgramCache]: Analyzing trace with hash 396360202, now seen corresponding path program 9 times [2024-06-21 17:59:51,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:51,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705680324] [2024-06-21 17:59:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:51,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:54,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:54,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705680324] [2024-06-21 17:59:54,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705680324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:54,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:54,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:54,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374389241] [2024-06-21 17:59:54,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:54,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:54,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:54,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:54,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:54,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:59:54,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 433 transitions, 6393 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:54,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:54,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:59:54,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:56,661 INFO L124 PetriNetUnfolderBase]: 3691/5821 cut-off events. [2024-06-21 17:59:56,661 INFO L125 PetriNetUnfolderBase]: For 1024226/1024234 co-relation queries the response was YES. [2024-06-21 17:59:56,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48445 conditions, 5821 events. 3691/5821 cut-off events. For 1024226/1024234 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 34912 event pairs, 792 based on Foata normal form. 12/5832 useless extension candidates. Maximal degree in co-relation 48282. Up to 4712 conditions per place. [2024-06-21 17:59:56,720 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 289 selfloop transitions, 174 changer transitions 0/468 dead transitions. [2024-06-21 17:59:56,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 468 transitions, 7959 flow [2024-06-21 17:59:56,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:56,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:56,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:59:56,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 17:59:56,721 INFO L175 Difference]: Start difference. First operand has 347 places, 433 transitions, 6393 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:59:56,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 468 transitions, 7959 flow [2024-06-21 17:59:59,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 468 transitions, 7655 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:59,074 INFO L231 Difference]: Finished difference. Result has 351 places, 439 transitions, 6573 flow [2024-06-21 17:59:59,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6111, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6573, PETRI_PLACES=351, PETRI_TRANSITIONS=439} [2024-06-21 17:59:59,075 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-21 17:59:59,075 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 439 transitions, 6573 flow [2024-06-21 17:59:59,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:59,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:59,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:59,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 17:59:59,075 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:59,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:59,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1359116884, now seen corresponding path program 10 times [2024-06-21 17:59:59,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:59,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814275730] [2024-06-21 17:59:59,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:59,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:01,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:01,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814275730] [2024-06-21 18:00:01,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814275730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:01,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:01,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:01,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053531456] [2024-06-21 18:00:01,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:01,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:01,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:01,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:01,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:01,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:00:01,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 439 transitions, 6573 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:01,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:01,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:00:01,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:04,476 INFO L124 PetriNetUnfolderBase]: 3679/5811 cut-off events. [2024-06-21 18:00:04,476 INFO L125 PetriNetUnfolderBase]: For 1020425/1020427 co-relation queries the response was YES. [2024-06-21 18:00:04,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47905 conditions, 5811 events. 3679/5811 cut-off events. For 1020425/1020427 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 34938 event pairs, 773 based on Foata normal form. 6/5817 useless extension candidates. Maximal degree in co-relation 47740. Up to 5418 conditions per place. [2024-06-21 18:00:04,551 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 416 selfloop transitions, 43 changer transitions 0/464 dead transitions. [2024-06-21 18:00:04,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 464 transitions, 7553 flow [2024-06-21 18:00:04,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:04,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:04,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 18:00:04,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-21 18:00:04,552 INFO L175 Difference]: Start difference. First operand has 351 places, 439 transitions, 6573 flow. Second operand 8 states and 137 transitions. [2024-06-21 18:00:04,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 464 transitions, 7553 flow [2024-06-21 18:00:07,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 464 transitions, 7274 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 18:00:07,607 INFO L231 Difference]: Finished difference. Result has 355 places, 439 transitions, 6386 flow [2024-06-21 18:00:07,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6294, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6386, PETRI_PLACES=355, PETRI_TRANSITIONS=439} [2024-06-21 18:00:07,607 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-21 18:00:07,607 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 439 transitions, 6386 flow [2024-06-21 18:00:07,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:07,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:07,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:07,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 18:00:07,608 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:07,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:07,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1688734192, now seen corresponding path program 11 times [2024-06-21 18:00:07,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:07,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996707429] [2024-06-21 18:00:07,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:07,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:07,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:11,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:11,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996707429] [2024-06-21 18:00:11,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996707429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:11,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:11,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:11,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913199691] [2024-06-21 18:00:11,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:11,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:11,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:11,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:11,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:11,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:00:11,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 439 transitions, 6386 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:11,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:11,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:00:11,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:14,252 INFO L124 PetriNetUnfolderBase]: 3731/5882 cut-off events. [2024-06-21 18:00:14,252 INFO L125 PetriNetUnfolderBase]: For 1063148/1063150 co-relation queries the response was YES. [2024-06-21 18:00:14,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48369 conditions, 5882 events. 3731/5882 cut-off events. For 1063148/1063150 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 35261 event pairs, 810 based on Foata normal form. 6/5888 useless extension candidates. Maximal degree in co-relation 48203. Up to 5458 conditions per place. [2024-06-21 18:00:14,351 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 419 selfloop transitions, 53 changer transitions 0/477 dead transitions. [2024-06-21 18:00:14,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 477 transitions, 7745 flow [2024-06-21 18:00:14,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:00:14,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:00:14,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-21 18:00:14,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763213530655391 [2024-06-21 18:00:14,353 INFO L175 Difference]: Start difference. First operand has 355 places, 439 transitions, 6386 flow. Second operand 11 states and 178 transitions. [2024-06-21 18:00:14,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 477 transitions, 7745 flow [2024-06-21 18:00:17,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 477 transitions, 7634 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 18:00:17,573 INFO L231 Difference]: Finished difference. Result has 360 places, 445 transitions, 6524 flow [2024-06-21 18:00:17,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6275, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6524, PETRI_PLACES=360, PETRI_TRANSITIONS=445} [2024-06-21 18:00:17,573 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-21 18:00:17,573 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 445 transitions, 6524 flow [2024-06-21 18:00:17,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:17,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:17,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:17,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 18:00:17,574 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:17,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:17,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1843303408, now seen corresponding path program 12 times [2024-06-21 18:00:17,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:17,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251759806] [2024-06-21 18:00:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:17,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:20,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:20,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251759806] [2024-06-21 18:00:20,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251759806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:20,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:20,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:20,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357529281] [2024-06-21 18:00:20,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:20,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:20,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:20,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:20,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:20,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:00:20,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 445 transitions, 6524 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:20,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:20,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:00:20,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:24,425 INFO L124 PetriNetUnfolderBase]: 3771/5946 cut-off events. [2024-06-21 18:00:24,426 INFO L125 PetriNetUnfolderBase]: For 1082662/1082664 co-relation queries the response was YES. [2024-06-21 18:00:24,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49033 conditions, 5946 events. 3771/5946 cut-off events. For 1082662/1082664 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 35835 event pairs, 810 based on Foata normal form. 6/5952 useless extension candidates. Maximal degree in co-relation 48865. Up to 5482 conditions per place. [2024-06-21 18:00:24,515 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 425 selfloop transitions, 59 changer transitions 0/489 dead transitions. [2024-06-21 18:00:24,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 489 transitions, 7918 flow [2024-06-21 18:00:24,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 18:00:24,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 18:00:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 206 transitions. [2024-06-21 18:00:24,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3685152057245081 [2024-06-21 18:00:24,516 INFO L175 Difference]: Start difference. First operand has 360 places, 445 transitions, 6524 flow. Second operand 13 states and 206 transitions. [2024-06-21 18:00:24,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 489 transitions, 7918 flow [2024-06-21 18:00:28,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 489 transitions, 7627 flow, removed 35 selfloop flow, removed 11 redundant places. [2024-06-21 18:00:28,646 INFO L231 Difference]: Finished difference. Result has 362 places, 451 transitions, 6471 flow [2024-06-21 18:00:28,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6261, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6471, PETRI_PLACES=362, PETRI_TRANSITIONS=451} [2024-06-21 18:00:28,646 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-21 18:00:28,646 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 451 transitions, 6471 flow [2024-06-21 18:00:28,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:28,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:28,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:28,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 18:00:28,646 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:28,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:28,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1829226928, now seen corresponding path program 13 times [2024-06-21 18:00:28,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:28,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891912890] [2024-06-21 18:00:28,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:28,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:31,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:31,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891912890] [2024-06-21 18:00:31,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891912890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:31,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:31,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:31,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240828539] [2024-06-21 18:00:31,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:31,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:31,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:31,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:31,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:31,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:00:31,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 451 transitions, 6471 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:31,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:31,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:00:31,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:35,165 INFO L124 PetriNetUnfolderBase]: 3791/5978 cut-off events. [2024-06-21 18:00:35,165 INFO L125 PetriNetUnfolderBase]: For 1095531/1095533 co-relation queries the response was YES. [2024-06-21 18:00:35,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49089 conditions, 5978 events. 3791/5978 cut-off events. For 1095531/1095533 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35955 event pairs, 874 based on Foata normal form. 6/5983 useless extension candidates. Maximal degree in co-relation 48923. Up to 4784 conditions per place. [2024-06-21 18:00:35,294 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 287 selfloop transitions, 201 changer transitions 0/493 dead transitions. [2024-06-21 18:00:35,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 493 transitions, 8285 flow [2024-06-21 18:00:35,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:00:35,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:00:35,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 202 transitions. [2024-06-21 18:00:35,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39147286821705424 [2024-06-21 18:00:35,295 INFO L175 Difference]: Start difference. First operand has 362 places, 451 transitions, 6471 flow. Second operand 12 states and 202 transitions. [2024-06-21 18:00:35,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 493 transitions, 8285 flow [2024-06-21 18:00:39,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 493 transitions, 8159 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 18:00:39,302 INFO L231 Difference]: Finished difference. Result has 364 places, 454 transitions, 6819 flow [2024-06-21 18:00:39,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6345, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6819, PETRI_PLACES=364, PETRI_TRANSITIONS=454} [2024-06-21 18:00:39,303 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-21 18:00:39,303 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 454 transitions, 6819 flow [2024-06-21 18:00:39,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:39,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:39,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:39,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 18:00:39,304 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:39,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:39,304 INFO L85 PathProgramCache]: Analyzing trace with hash 910272390, now seen corresponding path program 14 times [2024-06-21 18:00:39,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:39,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882954827] [2024-06-21 18:00:39,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:39,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:42,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:42,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882954827] [2024-06-21 18:00:42,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882954827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:42,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:42,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:42,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623282983] [2024-06-21 18:00:42,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:42,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:42,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:42,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:42,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:42,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:00:42,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 454 transitions, 6819 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:42,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:42,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:00:42,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:45,516 INFO L124 PetriNetUnfolderBase]: 3779/5948 cut-off events. [2024-06-21 18:00:45,516 INFO L125 PetriNetUnfolderBase]: For 1094328/1094330 co-relation queries the response was YES. [2024-06-21 18:00:45,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49328 conditions, 5948 events. 3779/5948 cut-off events. For 1094328/1094330 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 35741 event pairs, 820 based on Foata normal form. 6/5954 useless extension candidates. Maximal degree in co-relation 49161. Up to 5546 conditions per place. [2024-06-21 18:00:45,621 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 428 selfloop transitions, 49 changer transitions 0/482 dead transitions. [2024-06-21 18:00:45,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 482 transitions, 7841 flow [2024-06-21 18:00:45,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:00:45,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:00:45,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 18:00:45,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 18:00:45,622 INFO L175 Difference]: Start difference. First operand has 364 places, 454 transitions, 6819 flow. Second operand 9 states and 153 transitions. [2024-06-21 18:00:45,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 482 transitions, 7841 flow [2024-06-21 18:00:50,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 482 transitions, 7118 flow, removed 44 selfloop flow, removed 11 redundant places. [2024-06-21 18:00:50,299 INFO L231 Difference]: Finished difference. Result has 362 places, 454 transitions, 6200 flow [2024-06-21 18:00:50,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6096, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6200, PETRI_PLACES=362, PETRI_TRANSITIONS=454} [2024-06-21 18:00:50,299 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-21 18:00:50,299 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 454 transitions, 6200 flow [2024-06-21 18:00:50,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:50,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:50,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:50,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 18:00:50,300 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:50,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:50,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1837495558, now seen corresponding path program 15 times [2024-06-21 18:00:50,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:50,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234421297] [2024-06-21 18:00:50,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:50,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:53,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:53,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234421297] [2024-06-21 18:00:53,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234421297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:53,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:53,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:53,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678521467] [2024-06-21 18:00:53,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:53,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:53,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:53,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:53,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:53,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:00:53,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 454 transitions, 6200 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:53,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:53,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:00:53,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:55,768 INFO L124 PetriNetUnfolderBase]: 3767/5944 cut-off events. [2024-06-21 18:00:55,768 INFO L125 PetriNetUnfolderBase]: For 1070618/1070620 co-relation queries the response was YES. [2024-06-21 18:00:55,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47592 conditions, 5944 events. 3767/5944 cut-off events. For 1070618/1070620 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35773 event pairs, 880 based on Foata normal form. 6/5949 useless extension candidates. Maximal degree in co-relation 47427. Up to 4768 conditions per place. [2024-06-21 18:00:55,832 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 283 selfloop transitions, 197 changer transitions 0/485 dead transitions. [2024-06-21 18:00:55,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 485 transitions, 7698 flow [2024-06-21 18:00:55,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:00:55,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:00:55,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 18:00:55,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-21 18:00:55,833 INFO L175 Difference]: Start difference. First operand has 362 places, 454 transitions, 6200 flow. Second operand 9 states and 160 transitions. [2024-06-21 18:00:55,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 485 transitions, 7698 flow [2024-06-21 18:00:58,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 485 transitions, 7572 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 18:00:58,609 INFO L231 Difference]: Finished difference. Result has 362 places, 454 transitions, 6474 flow [2024-06-21 18:00:58,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6074, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6474, PETRI_PLACES=362, PETRI_TRANSITIONS=454} [2024-06-21 18:00:58,609 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-21 18:00:58,610 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 454 transitions, 6474 flow [2024-06-21 18:00:58,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:58,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:58,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:58,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 18:00:58,610 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:58,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:58,611 INFO L85 PathProgramCache]: Analyzing trace with hash 901985160, now seen corresponding path program 16 times [2024-06-21 18:00:58,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:58,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417798070] [2024-06-21 18:00:58,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:58,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:01,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:01,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:01,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417798070] [2024-06-21 18:01:01,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417798070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:01,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:01,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:01:01,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934956679] [2024-06-21 18:01:01,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:01,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:01:01,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:01,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:01:01,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:01:01,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:01:01,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 454 transitions, 6474 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:01,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:01,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:01:01,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:04,571 INFO L124 PetriNetUnfolderBase]: 3755/5924 cut-off events. [2024-06-21 18:01:04,571 INFO L125 PetriNetUnfolderBase]: For 1063974/1063976 co-relation queries the response was YES. [2024-06-21 18:01:04,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47511 conditions, 5924 events. 3755/5924 cut-off events. For 1063974/1063976 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35660 event pairs, 870 based on Foata normal form. 6/5929 useless extension candidates. Maximal degree in co-relation 47345. Up to 4760 conditions per place. [2024-06-21 18:01:04,650 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 285 selfloop transitions, 199 changer transitions 0/489 dead transitions. [2024-06-21 18:01:04,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 489 transitions, 7760 flow [2024-06-21 18:01:04,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:01:04,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:01:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-21 18:01:04,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974630021141649 [2024-06-21 18:01:04,651 INFO L175 Difference]: Start difference. First operand has 362 places, 454 transitions, 6474 flow. Second operand 11 states and 188 transitions. [2024-06-21 18:01:04,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 489 transitions, 7760 flow [2024-06-21 18:01:08,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 489 transitions, 7490 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 18:01:08,266 INFO L231 Difference]: Finished difference. Result has 368 places, 454 transitions, 6608 flow [2024-06-21 18:01:08,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6204, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6608, PETRI_PLACES=368, PETRI_TRANSITIONS=454} [2024-06-21 18:01:08,267 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-21 18:01:08,267 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 454 transitions, 6608 flow [2024-06-21 18:01:08,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:08,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:08,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:08,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 18:01:08,267 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:08,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:08,268 INFO L85 PathProgramCache]: Analyzing trace with hash -196097692, now seen corresponding path program 17 times [2024-06-21 18:01:08,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:08,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780364366] [2024-06-21 18:01:08,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:08,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:10,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:10,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780364366] [2024-06-21 18:01:10,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780364366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:10,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:10,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:10,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215317713] [2024-06-21 18:01:10,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:10,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:10,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:10,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:10,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:10,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:01:10,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 454 transitions, 6608 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:10,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:10,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:01:10,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:13,128 INFO L124 PetriNetUnfolderBase]: 3743/5896 cut-off events. [2024-06-21 18:01:13,129 INFO L125 PetriNetUnfolderBase]: For 1060314/1060314 co-relation queries the response was YES. [2024-06-21 18:01:13,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47127 conditions, 5896 events. 3743/5896 cut-off events. For 1060314/1060314 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 35521 event pairs, 870 based on Foata normal form. 4/5900 useless extension candidates. Maximal degree in co-relation 46959. Up to 5538 conditions per place. [2024-06-21 18:01:13,205 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 433 selfloop transitions, 40 changer transitions 0/478 dead transitions. [2024-06-21 18:01:13,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 478 transitions, 7844 flow [2024-06-21 18:01:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:01:13,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:01:13,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-21 18:01:13,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36511627906976746 [2024-06-21 18:01:13,206 INFO L175 Difference]: Start difference. First operand has 368 places, 454 transitions, 6608 flow. Second operand 10 states and 157 transitions. [2024-06-21 18:01:13,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 478 transitions, 7844 flow [2024-06-21 18:01:15,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 478 transitions, 7398 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-21 18:01:15,802 INFO L231 Difference]: Finished difference. Result has 367 places, 454 transitions, 6250 flow [2024-06-21 18:01:15,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6162, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6250, PETRI_PLACES=367, PETRI_TRANSITIONS=454} [2024-06-21 18:01:15,803 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-21 18:01:15,803 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 454 transitions, 6250 flow [2024-06-21 18:01:15,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:15,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:15,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:15,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 18:01:15,803 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:15,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:15,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1271389998, now seen corresponding path program 18 times [2024-06-21 18:01:15,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:15,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621146958] [2024-06-21 18:01:15,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:15,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:18,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:18,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621146958] [2024-06-21 18:01:18,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621146958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:18,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:18,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:18,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021417258] [2024-06-21 18:01:18,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:18,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:18,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:18,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:18,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:18,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:01:18,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 454 transitions, 6250 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:18,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:18,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:01:18,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:21,612 INFO L124 PetriNetUnfolderBase]: 3783/5956 cut-off events. [2024-06-21 18:01:21,613 INFO L125 PetriNetUnfolderBase]: For 1074283/1074283 co-relation queries the response was YES. [2024-06-21 18:01:21,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46990 conditions, 5956 events. 3783/5956 cut-off events. For 1074283/1074283 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 35948 event pairs, 874 based on Foata normal form. 4/5960 useless extension candidates. Maximal degree in co-relation 46821. Up to 5562 conditions per place. [2024-06-21 18:01:21,679 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 437 selfloop transitions, 48 changer transitions 0/490 dead transitions. [2024-06-21 18:01:21,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 490 transitions, 7660 flow [2024-06-21 18:01:21,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:01:21,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:01:21,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 185 transitions. [2024-06-21 18:01:21,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35852713178294576 [2024-06-21 18:01:21,681 INFO L175 Difference]: Start difference. First operand has 367 places, 454 transitions, 6250 flow. Second operand 12 states and 185 transitions. [2024-06-21 18:01:21,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 490 transitions, 7660 flow [2024-06-21 18:01:25,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 490 transitions, 7588 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 18:01:25,047 INFO L231 Difference]: Finished difference. Result has 372 places, 460 transitions, 6416 flow [2024-06-21 18:01:25,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6186, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6416, PETRI_PLACES=372, PETRI_TRANSITIONS=460} [2024-06-21 18:01:25,047 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-21 18:01:25,047 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 460 transitions, 6416 flow [2024-06-21 18:01:25,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:25,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:25,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:25,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 18:01:25,048 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:25,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:25,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1317863816, now seen corresponding path program 19 times [2024-06-21 18:01:25,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:25,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061949746] [2024-06-21 18:01:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:25,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:27,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:27,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061949746] [2024-06-21 18:01:27,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061949746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:27,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:27,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:27,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936500648] [2024-06-21 18:01:27,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:27,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:27,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:27,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:27,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:27,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:01:27,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 460 transitions, 6416 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:27,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:27,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:01:27,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:30,223 INFO L124 PetriNetUnfolderBase]: 3823/6003 cut-off events. [2024-06-21 18:01:30,223 INFO L125 PetriNetUnfolderBase]: For 1117424/1117424 co-relation queries the response was YES. [2024-06-21 18:01:30,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47464 conditions, 6003 events. 3823/6003 cut-off events. For 1117424/1117424 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 36099 event pairs, 837 based on Foata normal form. 8/6009 useless extension candidates. Maximal degree in co-relation 47294. Up to 5168 conditions per place. [2024-06-21 18:01:30,309 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 345 selfloop transitions, 145 changer transitions 0/495 dead transitions. [2024-06-21 18:01:30,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 495 transitions, 8048 flow [2024-06-21 18:01:30,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:01:30,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:01:30,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 18:01:30,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-21 18:01:30,310 INFO L175 Difference]: Start difference. First operand has 372 places, 460 transitions, 6416 flow. Second operand 10 states and 173 transitions. [2024-06-21 18:01:30,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 495 transitions, 8048 flow [2024-06-21 18:01:33,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 495 transitions, 7961 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:01:33,613 INFO L231 Difference]: Finished difference. Result has 374 places, 466 transitions, 6717 flow [2024-06-21 18:01:33,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6329, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6717, PETRI_PLACES=374, PETRI_TRANSITIONS=466} [2024-06-21 18:01:33,614 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-21 18:01:33,614 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 466 transitions, 6717 flow [2024-06-21 18:01:33,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:33,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:33,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:33,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 18:01:33,614 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:33,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:33,614 INFO L85 PathProgramCache]: Analyzing trace with hash -717230318, now seen corresponding path program 20 times [2024-06-21 18:01:33,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:33,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538318609] [2024-06-21 18:01:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:33,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:36,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:36,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538318609] [2024-06-21 18:01:36,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538318609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:36,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:36,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:36,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26872615] [2024-06-21 18:01:36,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:36,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:36,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:36,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:36,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:36,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:01:36,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 466 transitions, 6717 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:36,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:36,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:01:36,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:39,417 INFO L124 PetriNetUnfolderBase]: 3799/5969 cut-off events. [2024-06-21 18:01:39,417 INFO L125 PetriNetUnfolderBase]: For 1078734/1078734 co-relation queries the response was YES. [2024-06-21 18:01:39,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46892 conditions, 5969 events. 3799/5969 cut-off events. For 1078734/1078734 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 35897 event pairs, 829 based on Foata normal form. 8/5975 useless extension candidates. Maximal degree in co-relation 46721. Up to 5152 conditions per place. [2024-06-21 18:01:39,509 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 348 selfloop transitions, 144 changer transitions 0/497 dead transitions. [2024-06-21 18:01:39,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 497 transitions, 8273 flow [2024-06-21 18:01:39,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:01:39,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:01:39,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-21 18:01:39,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 18:01:39,510 INFO L175 Difference]: Start difference. First operand has 374 places, 466 transitions, 6717 flow. Second operand 11 states and 187 transitions. [2024-06-21 18:01:39,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 497 transitions, 8273 flow [2024-06-21 18:01:44,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 497 transitions, 8057 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 18:01:44,016 INFO L231 Difference]: Finished difference. Result has 379 places, 466 transitions, 6802 flow [2024-06-21 18:01:44,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6501, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6802, PETRI_PLACES=379, PETRI_TRANSITIONS=466} [2024-06-21 18:01:44,017 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-21 18:01:44,017 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 466 transitions, 6802 flow [2024-06-21 18:01:44,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:44,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:44,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:44,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 18:01:44,018 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:44,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:44,018 INFO L85 PathProgramCache]: Analyzing trace with hash 248246564, now seen corresponding path program 21 times [2024-06-21 18:01:44,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:44,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993628234] [2024-06-21 18:01:44,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:44,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:47,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:47,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993628234] [2024-06-21 18:01:47,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993628234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:47,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:47,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:47,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948521255] [2024-06-21 18:01:47,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:47,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:47,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:47,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:47,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:47,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:01:47,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 466 transitions, 6802 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:47,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:47,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:01:47,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:49,546 INFO L124 PetriNetUnfolderBase]: 3787/5964 cut-off events. [2024-06-21 18:01:49,546 INFO L125 PetriNetUnfolderBase]: For 1041670/1041670 co-relation queries the response was YES. [2024-06-21 18:01:49,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46500 conditions, 5964 events. 3787/5964 cut-off events. For 1041670/1041670 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 36041 event pairs, 870 based on Foata normal form. 4/5968 useless extension candidates. Maximal degree in co-relation 46328. Up to 5654 conditions per place. [2024-06-21 18:01:49,623 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 453 selfloop transitions, 30 changer transitions 0/488 dead transitions. [2024-06-21 18:01:49,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 488 transitions, 7820 flow [2024-06-21 18:01:49,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:01:49,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:01:49,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 18:01:49,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695090439276486 [2024-06-21 18:01:49,624 INFO L175 Difference]: Start difference. First operand has 379 places, 466 transitions, 6802 flow. Second operand 9 states and 143 transitions. [2024-06-21 18:01:49,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 488 transitions, 7820 flow [2024-06-21 18:01:52,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 488 transitions, 7563 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 18:01:52,251 INFO L231 Difference]: Finished difference. Result has 380 places, 466 transitions, 6611 flow [2024-06-21 18:01:52,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6545, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6611, PETRI_PLACES=380, PETRI_TRANSITIONS=466} [2024-06-21 18:01:52,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-21 18:01:52,252 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 466 transitions, 6611 flow [2024-06-21 18:01:52,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:52,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:52,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:01:52,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 18:01:52,252 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:52,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:52,253 INFO L85 PathProgramCache]: Analyzing trace with hash 247801094, now seen corresponding path program 22 times [2024-06-21 18:01:52,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:52,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565296686] [2024-06-21 18:01:52,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:52,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:54,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:54,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565296686] [2024-06-21 18:01:54,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565296686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:54,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:54,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:54,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033926433] [2024-06-21 18:01:54,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:54,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:54,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:54,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:54,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:54,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:01:54,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 466 transitions, 6611 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:54,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:54,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:01:54,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:56,819 INFO L124 PetriNetUnfolderBase]: 3775/5937 cut-off events. [2024-06-21 18:01:56,819 INFO L125 PetriNetUnfolderBase]: For 1022136/1022136 co-relation queries the response was YES. [2024-06-21 18:01:56,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45615 conditions, 5937 events. 3775/5937 cut-off events. For 1022136/1022136 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 35694 event pairs, 837 based on Foata normal form. 4/5939 useless extension candidates. Maximal degree in co-relation 45442. Up to 5136 conditions per place. [2024-06-21 18:01:56,901 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 338 selfloop transitions, 148 changer transitions 0/491 dead transitions. [2024-06-21 18:01:56,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 491 transitions, 8133 flow [2024-06-21 18:01:56,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:01:56,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:01:56,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 18:01:56,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-21 18:01:56,903 INFO L175 Difference]: Start difference. First operand has 380 places, 466 transitions, 6611 flow. Second operand 9 states and 154 transitions. [2024-06-21 18:01:56,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 491 transitions, 8133 flow [2024-06-21 18:02:01,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 491 transitions, 8037 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 18:02:01,075 INFO L231 Difference]: Finished difference. Result has 380 places, 466 transitions, 6817 flow [2024-06-21 18:02:01,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6515, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6817, PETRI_PLACES=380, PETRI_TRANSITIONS=466} [2024-06-21 18:02:01,075 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-21 18:02:01,075 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 466 transitions, 6817 flow [2024-06-21 18:02:01,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:01,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:01,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:01,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 18:02:01,076 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:01,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:01,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1843528530, now seen corresponding path program 1 times [2024-06-21 18:02:01,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:01,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339421264] [2024-06-21 18:02:01,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:01,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:05,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:05,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339421264] [2024-06-21 18:02:05,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339421264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:05,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:05,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:02:05,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101210862] [2024-06-21 18:02:05,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:05,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:02:05,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:05,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:02:05,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:02:05,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:02:05,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 466 transitions, 6817 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:05,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:05,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:02:05,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:08,895 INFO L124 PetriNetUnfolderBase]: 3785/5964 cut-off events. [2024-06-21 18:02:08,895 INFO L125 PetriNetUnfolderBase]: For 1009755/1009757 co-relation queries the response was YES. [2024-06-21 18:02:08,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45226 conditions, 5964 events. 3785/5964 cut-off events. For 1009755/1009757 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 35907 event pairs, 796 based on Foata normal form. 10/5974 useless extension candidates. Maximal degree in co-relation 45052. Up to 5474 conditions per place. [2024-06-21 18:02:08,998 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 445 selfloop transitions, 54 changer transitions 0/504 dead transitions. [2024-06-21 18:02:08,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 504 transitions, 7936 flow [2024-06-21 18:02:08,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:02:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:02:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-21 18:02:08,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784355179704017 [2024-06-21 18:02:08,999 INFO L175 Difference]: Start difference. First operand has 380 places, 466 transitions, 6817 flow. Second operand 11 states and 179 transitions. [2024-06-21 18:02:08,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 504 transitions, 7936 flow [2024-06-21 18:02:13,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 504 transitions, 7124 flow, removed 0 selfloop flow, removed 15 redundant places. [2024-06-21 18:02:13,169 INFO L231 Difference]: Finished difference. Result has 377 places, 467 transitions, 6136 flow [2024-06-21 18:02:13,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6005, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6136, PETRI_PLACES=377, PETRI_TRANSITIONS=467} [2024-06-21 18:02:13,170 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-21 18:02:13,170 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 467 transitions, 6136 flow [2024-06-21 18:02:13,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:13,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:13,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:13,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 18:02:13,170 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:13,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:13,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1650691852, now seen corresponding path program 2 times [2024-06-21 18:02:13,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:13,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685082181] [2024-06-21 18:02:13,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:13,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:16,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:16,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685082181] [2024-06-21 18:02:16,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685082181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:16,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:16,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:02:16,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714645613] [2024-06-21 18:02:16,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:16,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:02:16,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:16,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:02:16,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:02:16,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:02:16,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 467 transitions, 6136 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:16,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:16,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:02:16,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:19,606 INFO L124 PetriNetUnfolderBase]: 3767/5946 cut-off events. [2024-06-21 18:02:19,606 INFO L125 PetriNetUnfolderBase]: For 951902/951902 co-relation queries the response was YES. [2024-06-21 18:02:19,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43486 conditions, 5946 events. 3767/5946 cut-off events. For 951902/951902 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 35908 event pairs, 838 based on Foata normal form. 8/5954 useless extension candidates. Maximal degree in co-relation 43311. Up to 5524 conditions per place. [2024-06-21 18:02:19,705 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 456 selfloop transitions, 35 changer transitions 0/496 dead transitions. [2024-06-21 18:02:19,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 496 transitions, 7210 flow [2024-06-21 18:02:19,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:02:19,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:02:19,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-21 18:02:19,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3674418604651163 [2024-06-21 18:02:19,707 INFO L175 Difference]: Start difference. First operand has 377 places, 467 transitions, 6136 flow. Second operand 10 states and 158 transitions. [2024-06-21 18:02:19,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 496 transitions, 7210 flow [2024-06-21 18:02:23,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 496 transitions, 7068 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 18:02:23,508 INFO L231 Difference]: Finished difference. Result has 378 places, 467 transitions, 6070 flow [2024-06-21 18:02:23,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5994, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6070, PETRI_PLACES=378, PETRI_TRANSITIONS=467} [2024-06-21 18:02:23,509 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-21 18:02:23,509 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 467 transitions, 6070 flow [2024-06-21 18:02:23,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:23,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:23,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:23,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 18:02:23,509 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:23,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:23,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1031158343, now seen corresponding path program 1 times [2024-06-21 18:02:23,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:23,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945886219] [2024-06-21 18:02:23,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:23,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:27,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:27,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945886219] [2024-06-21 18:02:27,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945886219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:27,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:27,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:02:27,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140300384] [2024-06-21 18:02:27,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:27,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:02:27,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:27,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:02:27,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:02:27,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:02:27,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 467 transitions, 6070 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:27,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:27,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:02:27,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:29,998 INFO L124 PetriNetUnfolderBase]: 3855/6099 cut-off events. [2024-06-21 18:02:29,998 INFO L125 PetriNetUnfolderBase]: For 965780/965780 co-relation queries the response was YES. [2024-06-21 18:02:30,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43993 conditions, 6099 events. 3855/6099 cut-off events. For 965780/965780 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 37116 event pairs, 771 based on Foata normal form. 8/6107 useless extension candidates. Maximal degree in co-relation 43818. Up to 5449 conditions per place. [2024-06-21 18:02:30,067 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 461 selfloop transitions, 53 changer transitions 0/519 dead transitions. [2024-06-21 18:02:30,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 519 transitions, 7570 flow [2024-06-21 18:02:30,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:02:30,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:02:30,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 18:02:30,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-21 18:02:30,068 INFO L175 Difference]: Start difference. First operand has 378 places, 467 transitions, 6070 flow. Second operand 9 states and 169 transitions. [2024-06-21 18:02:30,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 519 transitions, 7570 flow [2024-06-21 18:02:34,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 519 transitions, 7477 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 18:02:34,508 INFO L231 Difference]: Finished difference. Result has 380 places, 471 transitions, 6174 flow [2024-06-21 18:02:34,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5977, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6174, PETRI_PLACES=380, PETRI_TRANSITIONS=471} [2024-06-21 18:02:34,508 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-21 18:02:34,508 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 471 transitions, 6174 flow [2024-06-21 18:02:34,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:34,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:34,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:34,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 18:02:34,509 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:34,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:34,509 INFO L85 PathProgramCache]: Analyzing trace with hash -765461063, now seen corresponding path program 2 times [2024-06-21 18:02:34,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:34,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272559834] [2024-06-21 18:02:34,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:34,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:37,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:37,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272559834] [2024-06-21 18:02:37,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272559834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:37,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:37,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:02:37,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408468973] [2024-06-21 18:02:37,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:37,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:02:37,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:37,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:02:37,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:02:38,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:02:38,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 471 transitions, 6174 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:38,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:38,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:02:38,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:40,315 INFO L124 PetriNetUnfolderBase]: 3929/6217 cut-off events. [2024-06-21 18:02:40,316 INFO L125 PetriNetUnfolderBase]: For 983141/983141 co-relation queries the response was YES. [2024-06-21 18:02:40,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44814 conditions, 6217 events. 3929/6217 cut-off events. For 983141/983141 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 38076 event pairs, 870 based on Foata normal form. 8/6225 useless extension candidates. Maximal degree in co-relation 44638. Up to 5759 conditions per place. [2024-06-21 18:02:40,387 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 465 selfloop transitions, 49 changer transitions 0/519 dead transitions. [2024-06-21 18:02:40,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 519 transitions, 7429 flow [2024-06-21 18:02:40,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:02:40,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:02:40,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 18:02:40,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-21 18:02:40,389 INFO L175 Difference]: Start difference. First operand has 380 places, 471 transitions, 6174 flow. Second operand 9 states and 165 transitions. [2024-06-21 18:02:40,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 519 transitions, 7429 flow [2024-06-21 18:02:44,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 519 transitions, 7044 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 18:02:44,163 INFO L231 Difference]: Finished difference. Result has 381 places, 476 transitions, 5982 flow [2024-06-21 18:02:44,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5796, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5982, PETRI_PLACES=381, PETRI_TRANSITIONS=476} [2024-06-21 18:02:44,163 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-21 18:02:44,164 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 476 transitions, 5982 flow [2024-06-21 18:02:44,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:44,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:44,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:44,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 18:02:44,164 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:44,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:44,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2135512319, now seen corresponding path program 1 times [2024-06-21 18:02:44,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:44,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361979200] [2024-06-21 18:02:44,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:44,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:46,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:46,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361979200] [2024-06-21 18:02:46,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361979200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:46,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:46,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:46,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410951872] [2024-06-21 18:02:46,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:46,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:46,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:46,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:46,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:46,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:02:46,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 476 transitions, 5982 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:46,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:46,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:02:46,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:49,277 INFO L124 PetriNetUnfolderBase]: 3939/6219 cut-off events. [2024-06-21 18:02:49,277 INFO L125 PetriNetUnfolderBase]: For 946846/946846 co-relation queries the response was YES. [2024-06-21 18:02:49,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44439 conditions, 6219 events. 3939/6219 cut-off events. For 946846/946846 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 37996 event pairs, 933 based on Foata normal form. 2/6221 useless extension candidates. Maximal degree in co-relation 44265. Up to 5840 conditions per place. [2024-06-21 18:02:49,342 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 462 selfloop transitions, 53 changer transitions 0/520 dead transitions. [2024-06-21 18:02:49,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 520 transitions, 7426 flow [2024-06-21 18:02:49,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:02:49,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:02:49,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 18:02:49,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-21 18:02:49,343 INFO L175 Difference]: Start difference. First operand has 381 places, 476 transitions, 5982 flow. Second operand 9 states and 164 transitions. [2024-06-21 18:02:49,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 520 transitions, 7426 flow [2024-06-21 18:02:53,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 520 transitions, 7318 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 18:02:53,533 INFO L231 Difference]: Finished difference. Result has 385 places, 479 transitions, 6030 flow [2024-06-21 18:02:53,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5874, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6030, PETRI_PLACES=385, PETRI_TRANSITIONS=479} [2024-06-21 18:02:53,533 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-21 18:02:53,533 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 479 transitions, 6030 flow [2024-06-21 18:02:53,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:53,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:53,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:02:53,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 18:02:53,534 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:53,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:53,534 INFO L85 PathProgramCache]: Analyzing trace with hash -942500513, now seen corresponding path program 2 times [2024-06-21 18:02:53,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:53,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061130118] [2024-06-21 18:02:53,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:53,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:56,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:56,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061130118] [2024-06-21 18:02:56,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061130118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:56,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:56,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:02:56,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902650775] [2024-06-21 18:02:56,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:56,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:02:56,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:56,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:02:56,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:02:56,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:02:56,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 479 transitions, 6030 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:56,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:56,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:02:56,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:59,621 INFO L124 PetriNetUnfolderBase]: 3933/6215 cut-off events. [2024-06-21 18:02:59,621 INFO L125 PetriNetUnfolderBase]: For 943137/943137 co-relation queries the response was YES. [2024-06-21 18:02:59,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44087 conditions, 6215 events. 3933/6215 cut-off events. For 943137/943137 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 38037 event pairs, 934 based on Foata normal form. 2/6217 useless extension candidates. Maximal degree in co-relation 43912. Up to 5835 conditions per place. [2024-06-21 18:02:59,687 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 462 selfloop transitions, 53 changer transitions 0/520 dead transitions. [2024-06-21 18:02:59,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 520 transitions, 7176 flow [2024-06-21 18:02:59,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:02:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:02:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 18:02:59,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-21 18:02:59,688 INFO L175 Difference]: Start difference. First operand has 385 places, 479 transitions, 6030 flow. Second operand 10 states and 175 transitions. [2024-06-21 18:02:59,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 520 transitions, 7176 flow [2024-06-21 18:03:03,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 520 transitions, 7056 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 18:03:03,099 INFO L231 Difference]: Finished difference. Result has 388 places, 479 transitions, 6022 flow [2024-06-21 18:03:03,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5910, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6022, PETRI_PLACES=388, PETRI_TRANSITIONS=479} [2024-06-21 18:03:03,099 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-21 18:03:03,099 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 479 transitions, 6022 flow [2024-06-21 18:03:03,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:03,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:03,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:03,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 18:03:03,100 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:03,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:03,100 INFO L85 PathProgramCache]: Analyzing trace with hash -942500327, now seen corresponding path program 1 times [2024-06-21 18:03:03,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:03,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097992822] [2024-06-21 18:03:03,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:03,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:06,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:06,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:06,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097992822] [2024-06-21 18:03:06,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097992822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:06,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:06,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:03:06,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94324901] [2024-06-21 18:03:06,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:06,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:03:06,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:06,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:03:06,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:03:06,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:03:06,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 479 transitions, 6022 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:06,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:06,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:03:06,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:08,726 INFO L124 PetriNetUnfolderBase]: 3975/6281 cut-off events. [2024-06-21 18:03:08,726 INFO L125 PetriNetUnfolderBase]: For 992877/992877 co-relation queries the response was YES. [2024-06-21 18:03:08,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45108 conditions, 6281 events. 3975/6281 cut-off events. For 992877/992877 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 38473 event pairs, 884 based on Foata normal form. 2/6283 useless extension candidates. Maximal degree in co-relation 44932. Up to 5654 conditions per place. [2024-06-21 18:03:08,812 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 428 selfloop transitions, 100 changer transitions 0/533 dead transitions. [2024-06-21 18:03:08,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 533 transitions, 7848 flow [2024-06-21 18:03:08,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:03:08,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:03:08,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-21 18:03:08,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-21 18:03:08,814 INFO L175 Difference]: Start difference. First operand has 388 places, 479 transitions, 6022 flow. Second operand 10 states and 187 transitions. [2024-06-21 18:03:08,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 533 transitions, 7848 flow [2024-06-21 18:03:13,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 533 transitions, 7748 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 18:03:13,377 INFO L231 Difference]: Finished difference. Result has 392 places, 485 transitions, 6298 flow [2024-06-21 18:03:13,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5922, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6298, PETRI_PLACES=392, PETRI_TRANSITIONS=485} [2024-06-21 18:03:13,377 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 348 predicate places. [2024-06-21 18:03:13,377 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 485 transitions, 6298 flow [2024-06-21 18:03:13,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:13,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:13,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:13,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 18:03:13,378 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:13,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:13,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1728318511, now seen corresponding path program 3 times [2024-06-21 18:03:13,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:13,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999531712] [2024-06-21 18:03:13,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:13,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:16,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:16,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999531712] [2024-06-21 18:03:16,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999531712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:16,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:16,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:03:16,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877430819] [2024-06-21 18:03:16,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:16,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:03:16,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:16,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:03:16,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:03:16,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:03:16,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 485 transitions, 6298 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:16,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:16,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:03:16,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:19,206 INFO L124 PetriNetUnfolderBase]: 4003/6325 cut-off events. [2024-06-21 18:03:19,207 INFO L125 PetriNetUnfolderBase]: For 1063698/1063698 co-relation queries the response was YES. [2024-06-21 18:03:19,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46450 conditions, 6325 events. 4003/6325 cut-off events. For 1063698/1063698 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 38694 event pairs, 886 based on Foata normal form. 8/6333 useless extension candidates. Maximal degree in co-relation 46272. Up to 5867 conditions per place. [2024-06-21 18:03:19,303 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 471 selfloop transitions, 47 changer transitions 0/523 dead transitions. [2024-06-21 18:03:19,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 523 transitions, 7511 flow [2024-06-21 18:03:19,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:03:19,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:03:19,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 18:03:19,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-21 18:03:19,305 INFO L175 Difference]: Start difference. First operand has 392 places, 485 transitions, 6298 flow. Second operand 9 states and 158 transitions. [2024-06-21 18:03:19,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 523 transitions, 7511 flow [2024-06-21 18:03:23,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 523 transitions, 7311 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-21 18:03:23,008 INFO L231 Difference]: Finished difference. Result has 397 places, 487 transitions, 6258 flow [2024-06-21 18:03:23,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6100, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6258, PETRI_PLACES=397, PETRI_TRANSITIONS=487} [2024-06-21 18:03:23,009 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-21 18:03:23,009 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 487 transitions, 6258 flow [2024-06-21 18:03:23,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:23,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:23,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:23,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 18:03:23,009 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:23,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:23,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1702792937, now seen corresponding path program 3 times [2024-06-21 18:03:23,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:23,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335169244] [2024-06-21 18:03:23,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:23,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:26,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:26,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335169244] [2024-06-21 18:03:26,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335169244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:26,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:26,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:03:26,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067824202] [2024-06-21 18:03:26,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:26,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:03:26,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:26,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:03:26,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:03:26,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:03:26,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 487 transitions, 6258 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:26,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:26,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:03:26,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:28,747 INFO L124 PetriNetUnfolderBase]: 4061/6418 cut-off events. [2024-06-21 18:03:28,747 INFO L125 PetriNetUnfolderBase]: For 1079539/1079541 co-relation queries the response was YES. [2024-06-21 18:03:28,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47924 conditions, 6418 events. 4061/6418 cut-off events. For 1079539/1079541 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 39273 event pairs, 798 based on Foata normal form. 4/6422 useless extension candidates. Maximal degree in co-relation 47743. Up to 5412 conditions per place. [2024-06-21 18:03:28,831 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 379 selfloop transitions, 156 changer transitions 0/540 dead transitions. [2024-06-21 18:03:28,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 540 transitions, 8196 flow [2024-06-21 18:03:28,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:03:28,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:03:28,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 18:03:28,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-21 18:03:28,833 INFO L175 Difference]: Start difference. First operand has 397 places, 487 transitions, 6258 flow. Second operand 9 states and 169 transitions. [2024-06-21 18:03:28,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 540 transitions, 8196 flow [2024-06-21 18:03:32,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 540 transitions, 8065 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 18:03:32,670 INFO L231 Difference]: Finished difference. Result has 400 places, 499 transitions, 6675 flow [2024-06-21 18:03:32,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6127, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6675, PETRI_PLACES=400, PETRI_TRANSITIONS=499} [2024-06-21 18:03:32,671 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-21 18:03:32,671 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 499 transitions, 6675 flow [2024-06-21 18:03:32,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:32,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:32,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:32,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 18:03:32,671 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:32,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:32,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1906181093, now seen corresponding path program 2 times [2024-06-21 18:03:32,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:32,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948640612] [2024-06-21 18:03:32,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:32,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:35,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:35,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948640612] [2024-06-21 18:03:35,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948640612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:35,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:35,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:03:35,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797294830] [2024-06-21 18:03:35,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:35,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:03:35,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:35,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:03:35,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:03:35,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:03:35,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 499 transitions, 6675 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:35,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:35,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:03:35,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:38,425 INFO L124 PetriNetUnfolderBase]: 4087/6458 cut-off events. [2024-06-21 18:03:38,425 INFO L125 PetriNetUnfolderBase]: For 1115619/1115621 co-relation queries the response was YES. [2024-06-21 18:03:38,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48841 conditions, 6458 events. 4087/6458 cut-off events. For 1115619/1115621 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 39574 event pairs, 786 based on Foata normal form. 4/6462 useless extension candidates. Maximal degree in co-relation 48661. Up to 4295 conditions per place. [2024-06-21 18:03:38,513 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 283 selfloop transitions, 262 changer transitions 0/550 dead transitions. [2024-06-21 18:03:38,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 550 transitions, 8949 flow [2024-06-21 18:03:38,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:03:38,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:03:38,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 18:03:38,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 18:03:38,515 INFO L175 Difference]: Start difference. First operand has 400 places, 499 transitions, 6675 flow. Second operand 9 states and 172 transitions. [2024-06-21 18:03:38,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 550 transitions, 8949 flow [2024-06-21 18:03:41,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 550 transitions, 8533 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-21 18:03:41,578 INFO L231 Difference]: Finished difference. Result has 405 places, 508 transitions, 7244 flow [2024-06-21 18:03:41,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6259, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7244, PETRI_PLACES=405, PETRI_TRANSITIONS=508} [2024-06-21 18:03:41,578 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-21 18:03:41,578 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 508 transitions, 7244 flow [2024-06-21 18:03:41,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:41,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:41,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:41,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 18:03:41,578 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:41,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:41,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1817305697, now seen corresponding path program 4 times [2024-06-21 18:03:41,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:41,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955901365] [2024-06-21 18:03:41,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:41,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:44,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:44,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955901365] [2024-06-21 18:03:44,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955901365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:44,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:44,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:03:44,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602687295] [2024-06-21 18:03:44,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:44,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:03:44,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:44,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:03:44,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:03:44,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:03:44,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 508 transitions, 7244 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:44,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:44,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:03:44,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:47,375 INFO L124 PetriNetUnfolderBase]: 4161/6567 cut-off events. [2024-06-21 18:03:47,376 INFO L125 PetriNetUnfolderBase]: For 1210475/1210481 co-relation queries the response was YES. [2024-06-21 18:03:47,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52475 conditions, 6567 events. 4161/6567 cut-off events. For 1210475/1210481 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 40268 event pairs, 790 based on Foata normal form. 8/6575 useless extension candidates. Maximal degree in co-relation 52292. Up to 5518 conditions per place. [2024-06-21 18:03:47,464 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 378 selfloop transitions, 178 changer transitions 0/561 dead transitions. [2024-06-21 18:03:47,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 561 transitions, 9583 flow [2024-06-21 18:03:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:03:47,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:03:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 18:03:47,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 18:03:47,466 INFO L175 Difference]: Start difference. First operand has 405 places, 508 transitions, 7244 flow. Second operand 8 states and 154 transitions. [2024-06-21 18:03:47,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 561 transitions, 9583 flow [2024-06-21 18:03:52,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 561 transitions, 9350 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-21 18:03:52,284 INFO L231 Difference]: Finished difference. Result has 409 places, 523 transitions, 7698 flow [2024-06-21 18:03:52,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7011, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7698, PETRI_PLACES=409, PETRI_TRANSITIONS=523} [2024-06-21 18:03:52,284 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-21 18:03:52,284 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 523 transitions, 7698 flow [2024-06-21 18:03:52,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:52,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:52,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:52,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 18:03:52,285 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:52,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:52,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1144184421, now seen corresponding path program 5 times [2024-06-21 18:03:52,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:52,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702686722] [2024-06-21 18:03:52,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:52,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:55,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:55,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702686722] [2024-06-21 18:03:55,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702686722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:55,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:55,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:03:55,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762778152] [2024-06-21 18:03:55,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:55,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:03:55,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:55,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:03:55,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:03:55,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:03:55,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 523 transitions, 7698 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:55,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:55,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:03:55,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:58,262 INFO L124 PetriNetUnfolderBase]: 4171/6580 cut-off events. [2024-06-21 18:03:58,262 INFO L125 PetriNetUnfolderBase]: For 1223793/1223795 co-relation queries the response was YES. [2024-06-21 18:03:58,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52387 conditions, 6580 events. 4171/6580 cut-off events. For 1223793/1223795 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 40349 event pairs, 812 based on Foata normal form. 4/6584 useless extension candidates. Maximal degree in co-relation 52202. Up to 5528 conditions per place. [2024-06-21 18:03:58,345 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 382 selfloop transitions, 174 changer transitions 0/561 dead transitions. [2024-06-21 18:03:58,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 561 transitions, 9227 flow [2024-06-21 18:03:58,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:03:58,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:03:58,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 18:03:58,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 18:03:58,346 INFO L175 Difference]: Start difference. First operand has 409 places, 523 transitions, 7698 flow. Second operand 9 states and 162 transitions. [2024-06-21 18:03:58,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 561 transitions, 9227 flow [2024-06-21 18:04:02,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 561 transitions, 8944 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-21 18:04:02,838 INFO L231 Difference]: Finished difference. Result has 415 places, 526 transitions, 7820 flow [2024-06-21 18:04:02,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7418, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7820, PETRI_PLACES=415, PETRI_TRANSITIONS=526} [2024-06-21 18:04:02,838 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-21 18:04:02,838 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 526 transitions, 7820 flow [2024-06-21 18:04:02,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:02,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:02,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:04:02,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 18:04:02,839 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:02,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:02,840 INFO L85 PathProgramCache]: Analyzing trace with hash -934527081, now seen corresponding path program 6 times [2024-06-21 18:04:02,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:02,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116830877] [2024-06-21 18:04:02,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:02,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:04:06,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:06,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116830877] [2024-06-21 18:04:06,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116830877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:06,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:06,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:04:06,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331125143] [2024-06-21 18:04:06,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:06,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:04:06,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:06,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:04:06,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:04:06,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:04:06,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 526 transitions, 7820 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:06,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:06,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:04:06,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:08,810 INFO L124 PetriNetUnfolderBase]: 4197/6615 cut-off events. [2024-06-21 18:04:08,810 INFO L125 PetriNetUnfolderBase]: For 1262331/1262337 co-relation queries the response was YES. [2024-06-21 18:04:08,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52975 conditions, 6615 events. 4197/6615 cut-off events. For 1262331/1262337 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 40562 event pairs, 797 based on Foata normal form. 8/6623 useless extension candidates. Maximal degree in co-relation 52789. Up to 5553 conditions per place. [2024-06-21 18:04:08,896 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 376 selfloop transitions, 185 changer transitions 0/566 dead transitions. [2024-06-21 18:04:08,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 566 transitions, 9970 flow [2024-06-21 18:04:08,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:04:08,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:04:08,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 18:04:08,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 18:04:08,898 INFO L175 Difference]: Start difference. First operand has 415 places, 526 transitions, 7820 flow. Second operand 8 states and 150 transitions. [2024-06-21 18:04:08,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 566 transitions, 9970 flow [2024-06-21 18:04:12,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 566 transitions, 9735 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 18:04:12,281 INFO L231 Difference]: Finished difference. Result has 417 places, 532 transitions, 8087 flow [2024-06-21 18:04:12,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7591, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8087, PETRI_PLACES=417, PETRI_TRANSITIONS=532} [2024-06-21 18:04:12,281 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-21 18:04:12,281 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 532 transitions, 8087 flow [2024-06-21 18:04:12,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:12,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:12,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:04:12,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 18:04:12,282 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:12,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:12,282 INFO L85 PathProgramCache]: Analyzing trace with hash -498854561, now seen corresponding path program 7 times [2024-06-21 18:04:12,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:12,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250763466] [2024-06-21 18:04:12,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:12,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:04:15,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:15,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250763466] [2024-06-21 18:04:15,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250763466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:15,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:15,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:04:15,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967903793] [2024-06-21 18:04:15,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:15,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:04:15,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:15,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:04:15,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:04:15,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:04:15,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 532 transitions, 8087 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:15,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:15,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:04:15,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:18,171 INFO L124 PetriNetUnfolderBase]: 4191/6612 cut-off events. [2024-06-21 18:04:18,171 INFO L125 PetriNetUnfolderBase]: For 1264624/1264626 co-relation queries the response was YES. [2024-06-21 18:04:18,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52866 conditions, 6612 events. 4191/6612 cut-off events. For 1264624/1264626 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 40566 event pairs, 814 based on Foata normal form. 4/6616 useless extension candidates. Maximal degree in co-relation 52679. Up to 5548 conditions per place. [2024-06-21 18:04:18,257 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 379 selfloop transitions, 179 changer transitions 0/563 dead transitions. [2024-06-21 18:04:18,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 563 transitions, 9561 flow [2024-06-21 18:04:18,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:18,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 18:04:18,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-21 18:04:18,258 INFO L175 Difference]: Start difference. First operand has 417 places, 532 transitions, 8087 flow. Second operand 9 states and 158 transitions. [2024-06-21 18:04:18,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 563 transitions, 9561 flow [2024-06-21 18:04:21,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 563 transitions, 9263 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 18:04:21,885 INFO L231 Difference]: Finished difference. Result has 422 places, 532 transitions, 8153 flow [2024-06-21 18:04:21,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8153, PETRI_PLACES=422, PETRI_TRANSITIONS=532} [2024-06-21 18:04:21,885 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 378 predicate places. [2024-06-21 18:04:21,885 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 532 transitions, 8153 flow [2024-06-21 18:04:21,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:21,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:21,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:04:21,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 18:04:21,886 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:21,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:21,886 INFO L85 PathProgramCache]: Analyzing trace with hash -498647171, now seen corresponding path program 8 times [2024-06-21 18:04:21,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:21,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607181061] [2024-06-21 18:04:21,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:21,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:04:24,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:24,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607181061] [2024-06-21 18:04:24,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607181061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:24,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:24,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:04:24,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362661245] [2024-06-21 18:04:24,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:24,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:04:24,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:24,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:04:24,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:04:24,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:04:24,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 532 transitions, 8153 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:24,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:24,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:04:24,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:27,620 INFO L124 PetriNetUnfolderBase]: 4201/6630 cut-off events. [2024-06-21 18:04:27,621 INFO L125 PetriNetUnfolderBase]: For 1284424/1284426 co-relation queries the response was YES. [2024-06-21 18:04:27,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53111 conditions, 6630 events. 4201/6630 cut-off events. For 1284424/1284426 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 40711 event pairs, 816 based on Foata normal form. 4/6634 useless extension candidates. Maximal degree in co-relation 52923. Up to 5558 conditions per place. [2024-06-21 18:04:27,695 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 380 selfloop transitions, 182 changer transitions 0/567 dead transitions. [2024-06-21 18:04:27,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 567 transitions, 9699 flow [2024-06-21 18:04:27,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:27,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 18:04:27,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-21 18:04:27,697 INFO L175 Difference]: Start difference. First operand has 422 places, 532 transitions, 8153 flow. Second operand 9 states and 160 transitions. [2024-06-21 18:04:27,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 567 transitions, 9699 flow [2024-06-21 18:04:32,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 567 transitions, 9179 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 18:04:32,537 INFO L231 Difference]: Finished difference. Result has 423 places, 535 transitions, 8063 flow [2024-06-21 18:04:32,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7642, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8063, PETRI_PLACES=423, PETRI_TRANSITIONS=535} [2024-06-21 18:04:32,538 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-21 18:04:32,538 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 535 transitions, 8063 flow [2024-06-21 18:04:32,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:32,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:32,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:04:32,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 18:04:32,538 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:32,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:32,538 INFO L85 PathProgramCache]: Analyzing trace with hash -498468425, now seen corresponding path program 3 times [2024-06-21 18:04:32,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:32,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826457201] [2024-06-21 18:04:32,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:32,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:04:35,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:35,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826457201] [2024-06-21 18:04:35,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826457201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:35,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:35,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:04:35,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122837356] [2024-06-21 18:04:35,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:35,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:04:35,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:35,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:04:35,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:04:35,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:04:35,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 535 transitions, 8063 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:35,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:35,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:04:35,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:38,201 INFO L124 PetriNetUnfolderBase]: 4227/6668 cut-off events. [2024-06-21 18:04:38,201 INFO L125 PetriNetUnfolderBase]: For 1320469/1320471 co-relation queries the response was YES. [2024-06-21 18:04:38,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53821 conditions, 6668 events. 4227/6668 cut-off events. For 1320469/1320471 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 40965 event pairs, 792 based on Foata normal form. 4/6672 useless extension candidates. Maximal degree in co-relation 53632. Up to 4376 conditions per place. [2024-06-21 18:04:38,287 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 292 selfloop transitions, 282 changer transitions 0/579 dead transitions. [2024-06-21 18:04:38,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 579 transitions, 10347 flow [2024-06-21 18:04:38,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:38,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:38,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 18:04:38,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 18:04:38,289 INFO L175 Difference]: Start difference. First operand has 423 places, 535 transitions, 8063 flow. Second operand 9 states and 168 transitions. [2024-06-21 18:04:38,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 579 transitions, 10347 flow [2024-06-21 18:04:43,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 579 transitions, 10097 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 18:04:43,444 INFO L231 Difference]: Finished difference. Result has 426 places, 541 transitions, 8531 flow [2024-06-21 18:04:43,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7813, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8531, PETRI_PLACES=426, PETRI_TRANSITIONS=541} [2024-06-21 18:04:43,444 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 382 predicate places. [2024-06-21 18:04:43,444 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 541 transitions, 8531 flow [2024-06-21 18:04:43,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:43,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:43,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:04:43,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 18:04:43,445 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:43,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:43,445 INFO L85 PathProgramCache]: Analyzing trace with hash -498854375, now seen corresponding path program 4 times [2024-06-21 18:04:43,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:43,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148615684] [2024-06-21 18:04:43,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:43,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:46,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:04:46,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:46,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148615684] [2024-06-21 18:04:46,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148615684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:46,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:46,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:04:46,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800611375] [2024-06-21 18:04:46,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:46,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:04:46,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:46,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:04:46,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:04:46,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 18:04:46,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 541 transitions, 8531 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:46,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:46,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 18:04:46,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:49,489 INFO L124 PetriNetUnfolderBase]: 4221/6658 cut-off events. [2024-06-21 18:04:49,489 INFO L125 PetriNetUnfolderBase]: For 1324427/1324429 co-relation queries the response was YES. [2024-06-21 18:04:49,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54102 conditions, 6658 events. 4221/6658 cut-off events. For 1324427/1324429 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 40974 event pairs, 791 based on Foata normal form. 4/6662 useless extension candidates. Maximal degree in co-relation 53912. Up to 4373 conditions per place. [2024-06-21 18:04:49,591 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 294 selfloop transitions, 280 changer transitions 0/579 dead transitions. [2024-06-21 18:04:49,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 579 transitions, 10395 flow [2024-06-21 18:04:49,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:49,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:49,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 18:04:49,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-21 18:04:49,592 INFO L175 Difference]: Start difference. First operand has 426 places, 541 transitions, 8531 flow. Second operand 9 states and 169 transitions. [2024-06-21 18:04:49,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 579 transitions, 10395 flow Killed by 15