./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe012_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/safe012_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 13:07:47,191 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:07:47,259 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:07:47,262 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:07:47,263 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:07:47,279 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:07:47,280 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:07:47,280 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:07:47,281 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:07:47,281 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:07:47,281 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:07:47,282 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:07:47,282 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:07:47,283 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:07:47,283 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:07:47,283 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:07:47,284 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:07:47,284 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:07:47,284 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:07:47,285 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:07:47,285 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:07:47,285 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:07:47,286 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:07:47,286 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:07:47,286 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:07:47,286 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:07:47,287 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:07:47,287 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:07:47,287 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:07:47,287 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:07:47,288 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:07:47,288 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:07:47,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:07:47,288 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:07:47,289 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:07:47,289 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:07:47,289 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:07:47,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:07:47,289 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:07:47,290 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:07:47,290 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:07:47,290 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:07:47,290 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:07:47,291 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:07:47,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:07:47,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:07:47,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:07:47,582 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:07:47,583 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:07:47,584 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe012_rmo.oepc.yml/witness.yml [2024-06-14 13:07:47,837 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:07:47,837 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:07:47,838 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i [2024-06-14 13:07:48,984 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:07:49,221 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:07:49,221 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i [2024-06-14 13:07:49,239 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c731f26d8/929867e9ba4c499c9ae2fdcda6cc2ef4/FLAGe000a5a0b [2024-06-14 13:07:49,263 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c731f26d8/929867e9ba4c499c9ae2fdcda6cc2ef4 [2024-06-14 13:07:49,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:07:49,264 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:07:49,267 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:07:49,267 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:07:49,271 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:07:49,272 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:07:47" (1/2) ... [2024-06-14 13:07:49,273 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bd696ec and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:07:49, skipping insertion in model container [2024-06-14 13:07:49,273 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:07:47" (1/2) ... [2024-06-14 13:07:49,276 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1e26627f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:07:49, skipping insertion in model container [2024-06-14 13:07:49,276 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:07:49" (2/2) ... [2024-06-14 13:07:49,276 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bd696ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:07:49, skipping insertion in model container [2024-06-14 13:07:49,277 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:07:49" (2/2) ... [2024-06-14 13:07:49,277 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:07:49,427 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:07:49,429 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & z) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 13:07:49,429 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & z) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 13:07:49,429 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & z) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 13:07:49,429 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:07:49,429 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-14 13:07:49,474 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:07:49,889 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:07:49,902 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:07:50,029 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:07:50,065 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:07:50,065 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:07:50 WrapperNode [2024-06-14 13:07:50,066 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:07:50,067 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:07:50,067 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:07:50,067 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:07:50,074 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:07:50" (1/1) ... [2024-06-14 13:07:50,109 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:07:50" (1/1) ... [2024-06-14 13:07:50,154 INFO L138 Inliner]: procedures = 175, calls = 80, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 209 [2024-06-14 13:07:50,156 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:07:50,157 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:07:50,157 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:07:50,157 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:07:50,168 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:07:50" (1/1) ... [2024-06-14 13:07:50,169 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:07:50" (1/1) ... [2024-06-14 13:07:50,188 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:07:50" (1/1) ... [2024-06-14 13:07:50,217 INFO L175 MemorySlicer]: Split 39 memory accesses to 2 slices as follows [2, 37]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-14 13:07:50,223 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:07:50" (1/1) ... [2024-06-14 13:07:50,224 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:07:50" (1/1) ... [2024-06-14 13:07:50,233 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:07:50" (1/1) ... [2024-06-14 13:07:50,250 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:07:50" (1/1) ... [2024-06-14 13:07:50,252 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:07:50" (1/1) ... [2024-06-14 13:07:50,254 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:07:50" (1/1) ... [2024-06-14 13:07:50,258 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:07:50,259 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:07:50,259 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:07:50,259 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:07:50,260 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:07:50" (1/1) ... [2024-06-14 13:07:50,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:07:50,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:07:50,322 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 13:07:50,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 13:07:50,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:07:50,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:07:50,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:07:50,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:07:50,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:07:50,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:07:50,379 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:07:50,379 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:07:50,379 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:07:50,379 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:07:50,379 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:07:50,379 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:07:50,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:07:50,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:07:50,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:07:50,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:07:50,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:07:50,382 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:07:50,510 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:07:50,512 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:07:51,005 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:07:51,006 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:07:51,477 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:07:51,477 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:07:51,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:07:51 BoogieIcfgContainer [2024-06-14 13:07:51,478 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:07:51,480 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:07:51,480 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:07:51,483 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:07:51,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:07:47" (1/4) ... [2024-06-14 13:07:51,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dcee381 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:07:51, skipping insertion in model container [2024-06-14 13:07:51,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:07:49" (2/4) ... [2024-06-14 13:07:51,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dcee381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:07:51, skipping insertion in model container [2024-06-14 13:07:51,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:07:50" (3/4) ... [2024-06-14 13:07:51,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dcee381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:07:51, skipping insertion in model container [2024-06-14 13:07:51,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:07:51" (4/4) ... [2024-06-14 13:07:51,486 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_rmo.oepc.i [2024-06-14 13:07:51,505 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:07:51,505 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:07:51,505 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:07:51,569 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:07:51,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 13:07:51,646 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 13:07:51,646 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:07:51,649 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 56 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. [2024-06-14 13:07:51,649 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 13:07:51,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 13:07:51,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:07:51,678 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;@6f762359, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:07:51,678 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:07:51,685 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:07:51,685 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:07:51,685 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:07:51,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:51,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:07:51,687 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:51,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:51,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1665062108, now seen corresponding path program 1 times [2024-06-14 13:07:51,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:51,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954029289] [2024-06-14 13:07:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:51,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:54,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:54,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954029289] [2024-06-14 13:07:54,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954029289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:54,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:54,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:07:54,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494767165] [2024-06-14 13:07:54,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:54,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:07:54,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:54,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:07:54,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:07:54,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 13:07:54,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:54,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:54,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 13:07:54,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:54,908 INFO L124 PetriNetUnfolderBase]: 770/1240 cut-off events. [2024-06-14 13:07:54,908 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-14 13:07:54,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2485 conditions, 1240 events. 770/1240 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5943 event pairs, 479 based on Foata normal form. 1/1208 useless extension candidates. Maximal degree in co-relation 2470. Up to 1178 conditions per place. [2024-06-14 13:07:54,923 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-14 13:07:54,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 185 flow [2024-06-14 13:07:54,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:07:54,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:07:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-14 13:07:54,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-14 13:07:54,936 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 72 transitions. [2024-06-14 13:07:54,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 185 flow [2024-06-14 13:07:54,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 180 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:07:54,940 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 13:07:54,942 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} [2024-06-14 13:07:54,945 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 13:07:54,945 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 13:07:54,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:54,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:54,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:54,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:07:54,946 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:54,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:54,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1898142179, now seen corresponding path program 1 times [2024-06-14 13:07:54,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:54,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950629157] [2024-06-14 13:07:54,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:54,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:57,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:57,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950629157] [2024-06-14 13:07:57,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950629157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:57,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:57,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:07:57,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779851565] [2024-06-14 13:07:57,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:57,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:07:57,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:57,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:07:57,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:07:57,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 13:07:57,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:57,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:57,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 13:07:57,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:58,372 INFO L124 PetriNetUnfolderBase]: 764/1232 cut-off events. [2024-06-14 13:07:58,373 INFO L125 PetriNetUnfolderBase]: For 253/261 co-relation queries the response was YES. [2024-06-14 13:07:58,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2840 conditions, 1232 events. 764/1232 cut-off events. For 253/261 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5860 event pairs, 369 based on Foata normal form. 6/1233 useless extension candidates. Maximal degree in co-relation 2825. Up to 1150 conditions per place. [2024-06-14 13:07:58,381 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 44 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-14 13:07:58,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 260 flow [2024-06-14 13:07:58,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:07:58,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:07:58,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-14 13:07:58,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5465116279069767 [2024-06-14 13:07:58,384 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 94 transitions. [2024-06-14 13:07:58,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 260 flow [2024-06-14 13:07:58,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:07:58,405 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 13:07:58,405 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} [2024-06-14 13:07:58,408 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 13:07:58,408 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 13:07:58,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:58,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:58,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:58,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:07:58,414 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:58,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:58,415 INFO L85 PathProgramCache]: Analyzing trace with hash 15121239, now seen corresponding path program 1 times [2024-06-14 13:07:58,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:58,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647511970] [2024-06-14 13:07:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:58,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:01,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:01,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647511970] [2024-06-14 13:08:01,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647511970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:01,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:01,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:08:01,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911345695] [2024-06-14 13:08:01,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:01,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:08:01,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:01,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:08:01,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:08:02,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:08:02,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:02,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:02,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:08:02,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:02,978 INFO L124 PetriNetUnfolderBase]: 969/1527 cut-off events. [2024-06-14 13:08:02,979 INFO L125 PetriNetUnfolderBase]: For 847/863 co-relation queries the response was YES. [2024-06-14 13:08:02,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3918 conditions, 1527 events. 969/1527 cut-off events. For 847/863 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7150 event pairs, 305 based on Foata normal form. 12/1531 useless extension candidates. Maximal degree in co-relation 3901. Up to 1394 conditions per place. [2024-06-14 13:08:02,992 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-14 13:08:02,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 384 flow [2024-06-14 13:08:02,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:08:02,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:08:02,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-14 13:08:02,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-14 13:08:02,998 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 128 transitions. [2024-06-14 13:08:02,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 384 flow [2024-06-14 13:08:03,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 364 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 13:08:03,002 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-14 13:08:03,003 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} [2024-06-14 13:08:03,004 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-14 13:08:03,004 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-14 13:08:03,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:03,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:03,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:03,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:08:03,005 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)] === [2024-06-14 13:08:03,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:03,006 INFO L85 PathProgramCache]: Analyzing trace with hash 84324626, now seen corresponding path program 1 times [2024-06-14 13:08:03,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:03,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164651597] [2024-06-14 13:08:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:03,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:05,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:05,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:05,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164651597] [2024-06-14 13:08:05,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164651597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:05,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:05,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:08:05,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256228989] [2024-06-14 13:08:05,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:05,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:08:05,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:05,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:08:05,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:08:05,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:08:05,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 10.833333333333334) 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) [2024-06-14 13:08:05,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:05,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:08:05,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:06,054 INFO L124 PetriNetUnfolderBase]: 964/1519 cut-off events. [2024-06-14 13:08:06,055 INFO L125 PetriNetUnfolderBase]: For 1574/1586 co-relation queries the response was YES. [2024-06-14 13:08:06,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4300 conditions, 1519 events. 964/1519 cut-off events. For 1574/1586 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7069 event pairs, 382 based on Foata normal form. 8/1524 useless extension candidates. Maximal degree in co-relation 4281. Up to 1452 conditions per place. [2024-06-14 13:08:06,065 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 47 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-14 13:08:06,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 341 flow [2024-06-14 13:08:06,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:08:06,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:08:06,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-14 13:08:06,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-14 13:08:06,067 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 94 transitions. [2024-06-14 13:08:06,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 341 flow [2024-06-14 13:08:06,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 314 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:08:06,073 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 200 flow [2024-06-14 13:08:06,074 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=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-14 13:08:06,075 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-14 13:08:06,075 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 200 flow [2024-06-14 13:08:06,075 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) [2024-06-14 13:08:06,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:06,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:06,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:08:06,077 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:06,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:06,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1692520703, now seen corresponding path program 1 times [2024-06-14 13:08:06,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:06,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156083643] [2024-06-14 13:08:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:06,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:08,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:08,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156083643] [2024-06-14 13:08:08,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156083643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:08,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:08,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:08:08,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548428965] [2024-06-14 13:08:08,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:08,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:08:08,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:08,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:08:08,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:08:08,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:08,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 200 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) [2024-06-14 13:08:08,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:08,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:08,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:09,559 INFO L124 PetriNetUnfolderBase]: 1112/1733 cut-off events. [2024-06-14 13:08:09,559 INFO L125 PetriNetUnfolderBase]: For 2431/2431 co-relation queries the response was YES. [2024-06-14 13:08:09,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5222 conditions, 1733 events. 1112/1733 cut-off events. For 2431/2431 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8117 event pairs, 451 based on Foata normal form. 2/1732 useless extension candidates. Maximal degree in co-relation 5201. Up to 1656 conditions per place. [2024-06-14 13:08:09,573 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-14 13:08:09,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 75 transitions, 428 flow [2024-06-14 13:08:09,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:08:09,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:08:09,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-14 13:08:09,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 13:08:09,579 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 200 flow. Second operand 6 states and 106 transitions. [2024-06-14 13:08:09,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 75 transitions, 428 flow [2024-06-14 13:08:09,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 75 transitions, 401 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 13:08:09,585 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 267 flow [2024-06-14 13:08:09,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-14 13:08:09,588 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-14 13:08:09,588 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 267 flow [2024-06-14 13:08:09,589 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) [2024-06-14 13:08:09,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:09,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:09,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:08:09,589 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:09,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:09,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1029135437, now seen corresponding path program 1 times [2024-06-14 13:08:09,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:09,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927474624] [2024-06-14 13:08:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:09,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:12,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:12,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927474624] [2024-06-14 13:08:12,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927474624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:12,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:12,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:08:12,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031900024] [2024-06-14 13:08:12,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:12,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:08:12,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:12,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:08:12,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:08:12,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:08:12,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:12,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:12,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:08:12,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:14,036 INFO L124 PetriNetUnfolderBase]: 1067/1678 cut-off events. [2024-06-14 13:08:14,036 INFO L125 PetriNetUnfolderBase]: For 3654/3686 co-relation queries the response was YES. [2024-06-14 13:08:14,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5606 conditions, 1678 events. 1067/1678 cut-off events. For 3654/3686 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7947 event pairs, 390 based on Foata normal form. 14/1680 useless extension candidates. Maximal degree in co-relation 5582. Up to 1549 conditions per place. [2024-06-14 13:08:14,049 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 19 changer transitions 0/87 dead transitions. [2024-06-14 13:08:14,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 539 flow [2024-06-14 13:08:14,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:08:14,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:08:14,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-14 13:08:14,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-14 13:08:14,051 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 267 flow. Second operand 6 states and 119 transitions. [2024-06-14 13:08:14,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 539 flow [2024-06-14 13:08:14,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 533 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-14 13:08:14,057 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 349 flow [2024-06-14 13:08:14,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=349, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-14 13:08:14,059 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-14 13:08:14,059 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 349 flow [2024-06-14 13:08:14,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:14,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:14,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:14,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:08:14,060 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:14,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:14,061 INFO L85 PathProgramCache]: Analyzing trace with hash -555653249, now seen corresponding path program 2 times [2024-06-14 13:08:14,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:14,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825965236] [2024-06-14 13:08:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:14,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:16,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:16,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825965236] [2024-06-14 13:08:16,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825965236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:16,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:16,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:08:16,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231296528] [2024-06-14 13:08:16,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:16,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:08:16,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:16,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:08:16,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:08:16,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:08:16,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 349 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:16,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:16,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:08:16,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:17,912 INFO L124 PetriNetUnfolderBase]: 1082/1705 cut-off events. [2024-06-14 13:08:17,912 INFO L125 PetriNetUnfolderBase]: For 5169/5210 co-relation queries the response was YES. [2024-06-14 13:08:17,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6224 conditions, 1705 events. 1082/1705 cut-off events. For 5169/5210 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8137 event pairs, 390 based on Foata normal form. 16/1710 useless extension candidates. Maximal degree in co-relation 6197. Up to 1574 conditions per place. [2024-06-14 13:08:17,924 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 53 selfloop transitions, 19 changer transitions 0/81 dead transitions. [2024-06-14 13:08:17,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 539 flow [2024-06-14 13:08:17,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:08:17,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:08:17,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-14 13:08:17,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437984496124031 [2024-06-14 13:08:17,927 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 349 flow. Second operand 6 states and 113 transitions. [2024-06-14 13:08:17,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 539 flow [2024-06-14 13:08:17,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 506 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 13:08:17,933 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 363 flow [2024-06-14 13:08:17,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=363, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2024-06-14 13:08:17,934 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-14 13:08:17,935 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 363 flow [2024-06-14 13:08:17,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:17,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:17,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:17,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:08:17,935 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:17,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:17,936 INFO L85 PathProgramCache]: Analyzing trace with hash -690705500, now seen corresponding path program 1 times [2024-06-14 13:08:17,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:17,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863836931] [2024-06-14 13:08:17,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:17,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:20,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:20,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863836931] [2024-06-14 13:08:20,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863836931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:20,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:20,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:08:20,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232519627] [2024-06-14 13:08:20,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:20,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:08:20,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:20,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:08:20,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:08:20,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:08:20,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 363 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) [2024-06-14 13:08:20,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:20,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:08:20,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:21,622 INFO L124 PetriNetUnfolderBase]: 1118/1770 cut-off events. [2024-06-14 13:08:21,622 INFO L125 PetriNetUnfolderBase]: For 5990/6030 co-relation queries the response was YES. [2024-06-14 13:08:21,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6522 conditions, 1770 events. 1118/1770 cut-off events. For 5990/6030 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8448 event pairs, 385 based on Foata normal form. 16/1775 useless extension candidates. Maximal degree in co-relation 6493. Up to 1608 conditions per place. [2024-06-14 13:08:21,636 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 76 selfloop transitions, 26 changer transitions 0/111 dead transitions. [2024-06-14 13:08:21,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 111 transitions, 737 flow [2024-06-14 13:08:21,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:21,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 13:08:21,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-14 13:08:21,639 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 363 flow. Second operand 8 states and 155 transitions. [2024-06-14 13:08:21,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 111 transitions, 737 flow [2024-06-14 13:08:21,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 111 transitions, 673 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:21,646 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 470 flow [2024-06-14 13:08:21,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=470, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2024-06-14 13:08:21,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-14 13:08:21,647 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 470 flow [2024-06-14 13:08:21,647 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) [2024-06-14 13:08:21,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:21,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:21,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:08:21,648 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:21,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:21,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1102766534, now seen corresponding path program 2 times [2024-06-14 13:08:21,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:21,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804195752] [2024-06-14 13:08:21,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:21,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:24,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:24,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804195752] [2024-06-14 13:08:24,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804195752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:24,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:24,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:08:24,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894862492] [2024-06-14 13:08:24,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:24,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:08:24,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:24,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:08:24,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:08:24,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:08:24,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 470 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) [2024-06-14 13:08:24,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:24,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:08:24,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:25,967 INFO L124 PetriNetUnfolderBase]: 1131/1795 cut-off events. [2024-06-14 13:08:25,967 INFO L125 PetriNetUnfolderBase]: For 7743/7798 co-relation queries the response was YES. [2024-06-14 13:08:25,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7124 conditions, 1795 events. 1131/1795 cut-off events. For 7743/7798 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8649 event pairs, 370 based on Foata normal form. 28/1812 useless extension candidates. Maximal degree in co-relation 7093. Up to 1610 conditions per place. [2024-06-14 13:08:25,979 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 74 selfloop transitions, 28 changer transitions 0/111 dead transitions. [2024-06-14 13:08:25,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 111 transitions, 798 flow [2024-06-14 13:08:25,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:25,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:25,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 13:08:25,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-14 13:08:25,982 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 470 flow. Second operand 7 states and 136 transitions. [2024-06-14 13:08:25,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 111 transitions, 798 flow [2024-06-14 13:08:25,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 111 transitions, 755 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 13:08:25,989 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 530 flow [2024-06-14 13:08:25,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=530, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2024-06-14 13:08:25,990 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-14 13:08:25,990 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 530 flow [2024-06-14 13:08:25,991 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) [2024-06-14 13:08:25,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:25,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:25,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:08:25,991 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:25,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:25,992 INFO L85 PathProgramCache]: Analyzing trace with hash -252004654, now seen corresponding path program 3 times [2024-06-14 13:08:25,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:25,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179432850] [2024-06-14 13:08:25,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:25,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:29,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:29,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179432850] [2024-06-14 13:08:29,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179432850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:29,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:29,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:08:29,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345562330] [2024-06-14 13:08:29,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:29,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:08:29,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:29,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:08:29,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:08:29,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:08:29,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 530 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) [2024-06-14 13:08:29,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:29,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:08:29,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:30,431 INFO L124 PetriNetUnfolderBase]: 1146/1823 cut-off events. [2024-06-14 13:08:30,431 INFO L125 PetriNetUnfolderBase]: For 10258/10328 co-relation queries the response was YES. [2024-06-14 13:08:30,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7715 conditions, 1823 events. 1146/1823 cut-off events. For 10258/10328 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8822 event pairs, 381 based on Foata normal form. 18/1826 useless extension candidates. Maximal degree in co-relation 7683. Up to 1564 conditions per place. [2024-06-14 13:08:30,445 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 65 selfloop transitions, 40 changer transitions 0/114 dead transitions. [2024-06-14 13:08:30,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 114 transitions, 924 flow [2024-06-14 13:08:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 13:08:30,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-14 13:08:30,448 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 530 flow. Second operand 7 states and 138 transitions. [2024-06-14 13:08:30,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 114 transitions, 924 flow [2024-06-14 13:08:30,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 114 transitions, 835 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:30,459 INFO L231 Difference]: Finished difference. Result has 77 places, 85 transitions, 607 flow [2024-06-14 13:08:30,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=607, PETRI_PLACES=77, PETRI_TRANSITIONS=85} [2024-06-14 13:08:30,460 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-14 13:08:30,460 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 85 transitions, 607 flow [2024-06-14 13:08:30,460 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) [2024-06-14 13:08:30,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:30,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:30,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:08:30,461 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:30,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:30,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1838429152, now seen corresponding path program 1 times [2024-06-14 13:08:30,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:30,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375390058] [2024-06-14 13:08:30,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:30,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:33,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:33,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375390058] [2024-06-14 13:08:33,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375390058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:33,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:33,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:08:33,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587246388] [2024-06-14 13:08:33,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:33,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:08:33,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:33,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:08:33,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:08:33,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:33,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 85 transitions, 607 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) [2024-06-14 13:08:33,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:33,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:33,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:34,698 INFO L124 PetriNetUnfolderBase]: 1249/1961 cut-off events. [2024-06-14 13:08:34,698 INFO L125 PetriNetUnfolderBase]: For 10078/10082 co-relation queries the response was YES. [2024-06-14 13:08:34,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8082 conditions, 1961 events. 1249/1961 cut-off events. For 10078/10082 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9393 event pairs, 407 based on Foata normal form. 6/1961 useless extension candidates. Maximal degree in co-relation 8049. Up to 1774 conditions per place. [2024-06-14 13:08:34,711 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 103 selfloop transitions, 23 changer transitions 0/131 dead transitions. [2024-06-14 13:08:34,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 131 transitions, 1077 flow [2024-06-14 13:08:34,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:34,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 13:08:34,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-14 13:08:34,713 INFO L175 Difference]: Start difference. First operand has 77 places, 85 transitions, 607 flow. Second operand 7 states and 132 transitions. [2024-06-14 13:08:34,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 131 transitions, 1077 flow [2024-06-14 13:08:34,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 131 transitions, 1026 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:08:34,728 INFO L231 Difference]: Finished difference. Result has 83 places, 99 transitions, 729 flow [2024-06-14 13:08:34,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=729, PETRI_PLACES=83, PETRI_TRANSITIONS=99} [2024-06-14 13:08:34,728 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-14 13:08:34,729 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 99 transitions, 729 flow [2024-06-14 13:08:34,729 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) [2024-06-14 13:08:34,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:34,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:34,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:08:34,729 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:34,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:34,730 INFO L85 PathProgramCache]: Analyzing trace with hash -2079204594, now seen corresponding path program 2 times [2024-06-14 13:08:34,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:34,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645240709] [2024-06-14 13:08:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:34,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:37,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:37,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645240709] [2024-06-14 13:08:37,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645240709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:37,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:37,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:08:37,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514685045] [2024-06-14 13:08:37,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:37,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:08:37,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:37,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:08:37,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:08:37,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:37,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 99 transitions, 729 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) [2024-06-14 13:08:37,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:37,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:37,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:38,659 INFO L124 PetriNetUnfolderBase]: 1262/1988 cut-off events. [2024-06-14 13:08:38,660 INFO L125 PetriNetUnfolderBase]: For 12021/12042 co-relation queries the response was YES. [2024-06-14 13:08:38,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8711 conditions, 1988 events. 1262/1988 cut-off events. For 12021/12042 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9548 event pairs, 404 based on Foata normal form. 16/1997 useless extension candidates. Maximal degree in co-relation 8674. Up to 1788 conditions per place. [2024-06-14 13:08:38,674 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 99 selfloop transitions, 29 changer transitions 0/133 dead transitions. [2024-06-14 13:08:38,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 133 transitions, 1151 flow [2024-06-14 13:08:38,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:38,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 13:08:38,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-14 13:08:38,678 INFO L175 Difference]: Start difference. First operand has 83 places, 99 transitions, 729 flow. Second operand 7 states and 127 transitions. [2024-06-14 13:08:38,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 133 transitions, 1151 flow [2024-06-14 13:08:38,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 133 transitions, 1115 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 13:08:38,697 INFO L231 Difference]: Finished difference. Result has 88 places, 105 transitions, 814 flow [2024-06-14 13:08:38,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=814, PETRI_PLACES=88, PETRI_TRANSITIONS=105} [2024-06-14 13:08:38,698 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-14 13:08:38,698 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 105 transitions, 814 flow [2024-06-14 13:08:38,699 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) [2024-06-14 13:08:38,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:38,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:38,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:08:38,699 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)] === [2024-06-14 13:08:38,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:38,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1280018024, now seen corresponding path program 4 times [2024-06-14 13:08:38,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:38,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846252764] [2024-06-14 13:08:38,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:38,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:41,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:41,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846252764] [2024-06-14 13:08:41,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846252764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:41,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:41,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:08:41,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596603159] [2024-06-14 13:08:41,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:41,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:08:41,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:41,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:08:41,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:08:41,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:08:41,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 105 transitions, 814 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) [2024-06-14 13:08:41,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:41,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:08:41,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:42,840 INFO L124 PetriNetUnfolderBase]: 1189/1901 cut-off events. [2024-06-14 13:08:42,840 INFO L125 PetriNetUnfolderBase]: For 14063/14176 co-relation queries the response was YES. [2024-06-14 13:08:42,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8685 conditions, 1901 events. 1189/1901 cut-off events. For 14063/14176 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9310 event pairs, 365 based on Foata normal form. 22/1876 useless extension candidates. Maximal degree in co-relation 8646. Up to 1598 conditions per place. [2024-06-14 13:08:42,855 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 69 selfloop transitions, 45 changer transitions 0/129 dead transitions. [2024-06-14 13:08:42,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 129 transitions, 1110 flow [2024-06-14 13:08:42,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:42,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:42,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 13:08:42,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-14 13:08:42,857 INFO L175 Difference]: Start difference. First operand has 88 places, 105 transitions, 814 flow. Second operand 7 states and 132 transitions. [2024-06-14 13:08:42,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 129 transitions, 1110 flow [2024-06-14 13:08:42,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 129 transitions, 1067 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 13:08:42,872 INFO L231 Difference]: Finished difference. Result has 93 places, 105 transitions, 870 flow [2024-06-14 13:08:42,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=870, PETRI_PLACES=93, PETRI_TRANSITIONS=105} [2024-06-14 13:08:42,873 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-14 13:08:42,873 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 105 transitions, 870 flow [2024-06-14 13:08:42,873 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) [2024-06-14 13:08:42,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:42,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:42,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:08:42,874 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:42,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:42,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1280018210, now seen corresponding path program 3 times [2024-06-14 13:08:42,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:42,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144214327] [2024-06-14 13:08:42,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:42,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:45,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:45,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144214327] [2024-06-14 13:08:45,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144214327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:45,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:45,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:08:45,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056856856] [2024-06-14 13:08:45,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:45,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:08:45,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:45,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:08:45,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:08:45,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:45,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 105 transitions, 870 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) [2024-06-14 13:08:45,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:45,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:45,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:46,808 INFO L124 PetriNetUnfolderBase]: 1249/1970 cut-off events. [2024-06-14 13:08:46,808 INFO L125 PetriNetUnfolderBase]: For 15607/15628 co-relation queries the response was YES. [2024-06-14 13:08:46,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9027 conditions, 1970 events. 1249/1970 cut-off events. For 15607/15628 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9517 event pairs, 403 based on Foata normal form. 16/1979 useless extension candidates. Maximal degree in co-relation 8986. Up to 1772 conditions per place. [2024-06-14 13:08:46,821 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 98 selfloop transitions, 28 changer transitions 0/131 dead transitions. [2024-06-14 13:08:46,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 131 transitions, 1202 flow [2024-06-14 13:08:46,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:46,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:46,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 13:08:46,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:08:46,823 INFO L175 Difference]: Start difference. First operand has 93 places, 105 transitions, 870 flow. Second operand 7 states and 126 transitions. [2024-06-14 13:08:46,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 131 transitions, 1202 flow [2024-06-14 13:08:46,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 131 transitions, 1082 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:46,841 INFO L231 Difference]: Finished difference. Result has 94 places, 105 transitions, 814 flow [2024-06-14 13:08:46,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=814, PETRI_PLACES=94, PETRI_TRANSITIONS=105} [2024-06-14 13:08:46,841 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-14 13:08:46,842 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 105 transitions, 814 flow [2024-06-14 13:08:46,842 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) [2024-06-14 13:08:46,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:46,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:46,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:08:46,842 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:46,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:46,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1280264288, now seen corresponding path program 1 times [2024-06-14 13:08:46,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:46,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184296871] [2024-06-14 13:08:46,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:46,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:49,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:49,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184296871] [2024-06-14 13:08:49,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184296871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:49,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:49,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:08:49,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246063762] [2024-06-14 13:08:49,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:49,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:08:49,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:49,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:08:49,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:08:49,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:49,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 105 transitions, 814 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) [2024-06-14 13:08:49,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:49,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:49,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:50,351 INFO L124 PetriNetUnfolderBase]: 1241/1952 cut-off events. [2024-06-14 13:08:50,351 INFO L125 PetriNetUnfolderBase]: For 16486/16488 co-relation queries the response was YES. [2024-06-14 13:08:50,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8973 conditions, 1952 events. 1241/1952 cut-off events. For 16486/16488 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9370 event pairs, 390 based on Foata normal form. 4/1953 useless extension candidates. Maximal degree in co-relation 8931. Up to 1825 conditions per place. [2024-06-14 13:08:50,363 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 114 selfloop transitions, 13 changer transitions 0/132 dead transitions. [2024-06-14 13:08:50,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 132 transitions, 1150 flow [2024-06-14 13:08:50,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:50,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:08:50,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 13:08:50,365 INFO L175 Difference]: Start difference. First operand has 94 places, 105 transitions, 814 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:08:50,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 132 transitions, 1150 flow [2024-06-14 13:08:50,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 132 transitions, 1094 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:50,385 INFO L231 Difference]: Finished difference. Result has 96 places, 107 transitions, 807 flow [2024-06-14 13:08:50,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=807, PETRI_PLACES=96, PETRI_TRANSITIONS=107} [2024-06-14 13:08:50,386 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-14 13:08:50,386 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 107 transitions, 807 flow [2024-06-14 13:08:50,386 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) [2024-06-14 13:08:50,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:50,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:50,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:08:50,387 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:50,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:50,387 INFO L85 PathProgramCache]: Analyzing trace with hash -173974137, now seen corresponding path program 1 times [2024-06-14 13:08:50,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:50,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015944528] [2024-06-14 13:08:50,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:50,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:53,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:53,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015944528] [2024-06-14 13:08:53,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015944528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:53,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:53,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:53,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402544591] [2024-06-14 13:08:53,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:53,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:53,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:53,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:53,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:53,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:53,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 107 transitions, 807 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) [2024-06-14 13:08:53,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:53,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:53,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:54,757 INFO L124 PetriNetUnfolderBase]: 1254/1979 cut-off events. [2024-06-14 13:08:54,758 INFO L125 PetriNetUnfolderBase]: For 18301/18309 co-relation queries the response was YES. [2024-06-14 13:08:54,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9276 conditions, 1979 events. 1254/1979 cut-off events. For 18301/18309 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9506 event pairs, 374 based on Foata normal form. 10/1986 useless extension candidates. Maximal degree in co-relation 9233. Up to 1776 conditions per place. [2024-06-14 13:08:54,770 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 129 selfloop transitions, 25 changer transitions 0/159 dead transitions. [2024-06-14 13:08:54,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 159 transitions, 1336 flow [2024-06-14 13:08:54,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:54,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:54,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:08:54,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 13:08:54,772 INFO L175 Difference]: Start difference. First operand has 96 places, 107 transitions, 807 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:08:54,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 159 transitions, 1336 flow [2024-06-14 13:08:54,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 159 transitions, 1305 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:54,790 INFO L231 Difference]: Finished difference. Result has 101 places, 122 transitions, 989 flow [2024-06-14 13:08:54,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=989, PETRI_PLACES=101, PETRI_TRANSITIONS=122} [2024-06-14 13:08:54,791 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-14 13:08:54,791 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 122 transitions, 989 flow [2024-06-14 13:08:54,791 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) [2024-06-14 13:08:54,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:54,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:54,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:08:54,792 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:54,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:54,792 INFO L85 PathProgramCache]: Analyzing trace with hash -170249487, now seen corresponding path program 2 times [2024-06-14 13:08:54,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:54,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665459489] [2024-06-14 13:08:54,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:54,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:57,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:57,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665459489] [2024-06-14 13:08:57,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665459489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:57,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:57,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:57,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436652815] [2024-06-14 13:08:57,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:57,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:57,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:57,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:57,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:57,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:57,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 122 transitions, 989 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) [2024-06-14 13:08:57,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:57,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:57,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:59,394 INFO L124 PetriNetUnfolderBase]: 1285/2033 cut-off events. [2024-06-14 13:08:59,395 INFO L125 PetriNetUnfolderBase]: For 21708/21710 co-relation queries the response was YES. [2024-06-14 13:08:59,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10069 conditions, 2033 events. 1285/2033 cut-off events. For 21708/21710 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9832 event pairs, 381 based on Foata normal form. 2/2029 useless extension candidates. Maximal degree in co-relation 10023. Up to 1667 conditions per place. [2024-06-14 13:08:59,406 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 117 selfloop transitions, 50 changer transitions 0/172 dead transitions. [2024-06-14 13:08:59,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 172 transitions, 1647 flow [2024-06-14 13:08:59,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:59,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 13:08:59,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 13:08:59,408 INFO L175 Difference]: Start difference. First operand has 101 places, 122 transitions, 989 flow. Second operand 8 states and 153 transitions. [2024-06-14 13:08:59,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 172 transitions, 1647 flow [2024-06-14 13:08:59,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 172 transitions, 1595 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 13:08:59,430 INFO L231 Difference]: Finished difference. Result has 107 places, 135 transitions, 1195 flow [2024-06-14 13:08:59,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1195, PETRI_PLACES=107, PETRI_TRANSITIONS=135} [2024-06-14 13:08:59,431 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-14 13:08:59,431 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 135 transitions, 1195 flow [2024-06-14 13:08:59,431 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) [2024-06-14 13:08:59,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:59,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:59,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:08:59,432 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:59,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:59,432 INFO L85 PathProgramCache]: Analyzing trace with hash -170255067, now seen corresponding path program 3 times [2024-06-14 13:08:59,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:59,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067328271] [2024-06-14 13:08:59,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:59,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:02,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:02,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067328271] [2024-06-14 13:09:02,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067328271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:02,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:02,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:02,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451778410] [2024-06-14 13:09:02,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:02,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:02,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:02,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:02,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:02,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:02,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 135 transitions, 1195 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) [2024-06-14 13:09:02,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:02,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:02,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:04,043 INFO L124 PetriNetUnfolderBase]: 1280/2026 cut-off events. [2024-06-14 13:09:04,044 INFO L125 PetriNetUnfolderBase]: For 24896/24898 co-relation queries the response was YES. [2024-06-14 13:09:04,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10726 conditions, 2026 events. 1280/2026 cut-off events. For 24896/24898 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9824 event pairs, 381 based on Foata normal form. 2/2022 useless extension candidates. Maximal degree in co-relation 10677. Up to 1662 conditions per place. [2024-06-14 13:09:04,055 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 117 selfloop transitions, 48 changer transitions 0/170 dead transitions. [2024-06-14 13:09:04,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 170 transitions, 1688 flow [2024-06-14 13:09:04,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:04,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:04,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 13:09:04,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 13:09:04,057 INFO L175 Difference]: Start difference. First operand has 107 places, 135 transitions, 1195 flow. Second operand 8 states and 152 transitions. [2024-06-14 13:09:04,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 170 transitions, 1688 flow [2024-06-14 13:09:04,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 170 transitions, 1644 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-14 13:09:04,092 INFO L231 Difference]: Finished difference. Result has 113 places, 135 transitions, 1255 flow [2024-06-14 13:09:04,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1255, PETRI_PLACES=113, PETRI_TRANSITIONS=135} [2024-06-14 13:09:04,093 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-14 13:09:04,093 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 135 transitions, 1255 flow [2024-06-14 13:09:04,094 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) [2024-06-14 13:09:04,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:04,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:04,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:09:04,094 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:04,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:04,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1406774107, now seen corresponding path program 4 times [2024-06-14 13:09:04,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:04,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690846462] [2024-06-14 13:09:04,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:04,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:07,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:07,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:07,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690846462] [2024-06-14 13:09:07,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690846462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:07,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:07,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:07,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848428544] [2024-06-14 13:09:07,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:07,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:07,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:07,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:07,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:07,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:07,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 135 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) [2024-06-14 13:09:07,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:07,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:07,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:08,800 INFO L124 PetriNetUnfolderBase]: 1311/2082 cut-off events. [2024-06-14 13:09:08,800 INFO L125 PetriNetUnfolderBase]: For 28518/28535 co-relation queries the response was YES. [2024-06-14 13:09:08,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11361 conditions, 2082 events. 1311/2082 cut-off events. For 28518/28535 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10164 event pairs, 385 based on Foata normal form. 6/2075 useless extension candidates. Maximal degree in co-relation 11310. Up to 1695 conditions per place. [2024-06-14 13:09:08,815 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 116 selfloop transitions, 54 changer transitions 0/175 dead transitions. [2024-06-14 13:09:08,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 175 transitions, 1908 flow [2024-06-14 13:09:08,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:09:08,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 13:09:08,818 INFO L175 Difference]: Start difference. First operand has 113 places, 135 transitions, 1255 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:09:08,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 175 transitions, 1908 flow [2024-06-14 13:09:08,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 175 transitions, 1785 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:08,842 INFO L231 Difference]: Finished difference. Result has 116 places, 142 transitions, 1348 flow [2024-06-14 13:09:08,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1348, PETRI_PLACES=116, PETRI_TRANSITIONS=142} [2024-06-14 13:09:08,842 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-14 13:09:08,842 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 142 transitions, 1348 flow [2024-06-14 13:09:08,843 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) [2024-06-14 13:09:08,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:08,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:08,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:09:08,843 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:08,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:08,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1025854757, now seen corresponding path program 5 times [2024-06-14 13:09:08,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:08,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839580907] [2024-06-14 13:09:08,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:08,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:11,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:11,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839580907] [2024-06-14 13:09:11,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839580907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:11,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:11,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:11,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872316525] [2024-06-14 13:09:11,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:11,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:11,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:11,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:11,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:11,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:11,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 142 transitions, 1348 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) [2024-06-14 13:09:11,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:11,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:11,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:13,228 INFO L124 PetriNetUnfolderBase]: 1306/2075 cut-off events. [2024-06-14 13:09:13,228 INFO L125 PetriNetUnfolderBase]: For 30607/30624 co-relation queries the response was YES. [2024-06-14 13:09:13,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11455 conditions, 2075 events. 1306/2075 cut-off events. For 30607/30624 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10123 event pairs, 385 based on Foata normal form. 6/2068 useless extension candidates. Maximal degree in co-relation 11402. Up to 1690 conditions per place. [2024-06-14 13:09:13,240 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 113 selfloop transitions, 55 changer transitions 0/173 dead transitions. [2024-06-14 13:09:13,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 173 transitions, 1842 flow [2024-06-14 13:09:13,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:13,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:09:13,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 13:09:13,242 INFO L175 Difference]: Start difference. First operand has 116 places, 142 transitions, 1348 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:09:13,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 173 transitions, 1842 flow [2024-06-14 13:09:13,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 173 transitions, 1675 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:13,268 INFO L231 Difference]: Finished difference. Result has 118 places, 142 transitions, 1299 flow [2024-06-14 13:09:13,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1299, PETRI_PLACES=118, PETRI_TRANSITIONS=142} [2024-06-14 13:09:13,268 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2024-06-14 13:09:13,269 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 142 transitions, 1299 flow [2024-06-14 13:09:13,269 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) [2024-06-14 13:09:13,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:13,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:13,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:09:13,269 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)] === [2024-06-14 13:09:13,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:13,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1026062147, now seen corresponding path program 6 times [2024-06-14 13:09:13,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:13,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144631837] [2024-06-14 13:09:13,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:13,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:16,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:16,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144631837] [2024-06-14 13:09:16,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144631837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:16,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:16,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:16,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675433508] [2024-06-14 13:09:16,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:16,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:16,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:16,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:16,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:16,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:16,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 142 transitions, 1299 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) [2024-06-14 13:09:16,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:16,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:16,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:17,541 INFO L124 PetriNetUnfolderBase]: 1301/2068 cut-off events. [2024-06-14 13:09:17,541 INFO L125 PetriNetUnfolderBase]: For 32075/32092 co-relation queries the response was YES. [2024-06-14 13:09:17,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11359 conditions, 2068 events. 1301/2068 cut-off events. For 32075/32092 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10087 event pairs, 385 based on Foata normal form. 6/2061 useless extension candidates. Maximal degree in co-relation 11306. Up to 1685 conditions per place. [2024-06-14 13:09:17,553 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 108 selfloop transitions, 59 changer transitions 0/172 dead transitions. [2024-06-14 13:09:17,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 172 transitions, 1727 flow [2024-06-14 13:09:17,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:09:17,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:09:17,562 INFO L175 Difference]: Start difference. First operand has 118 places, 142 transitions, 1299 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:09:17,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 172 transitions, 1727 flow [2024-06-14 13:09:17,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 172 transitions, 1599 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:17,604 INFO L231 Difference]: Finished difference. Result has 120 places, 143 transitions, 1309 flow [2024-06-14 13:09:17,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1309, PETRI_PLACES=120, PETRI_TRANSITIONS=143} [2024-06-14 13:09:17,605 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-14 13:09:17,605 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 143 transitions, 1309 flow [2024-06-14 13:09:17,606 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) [2024-06-14 13:09:17,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:17,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:17,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:09:17,606 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:17,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:17,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1788454479, now seen corresponding path program 1 times [2024-06-14 13:09:17,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:17,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124025284] [2024-06-14 13:09:17,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:17,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:20,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:20,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124025284] [2024-06-14 13:09:20,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124025284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:20,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:20,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:20,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133757684] [2024-06-14 13:09:20,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:20,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:20,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:20,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:20,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:20,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:09:20,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 143 transitions, 1309 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-14 13:09:20,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:20,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:09:20,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:22,029 INFO L124 PetriNetUnfolderBase]: 1307/2103 cut-off events. [2024-06-14 13:09:22,029 INFO L125 PetriNetUnfolderBase]: For 39333/39359 co-relation queries the response was YES. [2024-06-14 13:09:22,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11957 conditions, 2103 events. 1307/2103 cut-off events. For 39333/39359 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10648 event pairs, 212 based on Foata normal form. 20/2077 useless extension candidates. Maximal degree in co-relation 11903. Up to 1677 conditions per place. [2024-06-14 13:09:22,042 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 119 selfloop transitions, 48 changer transitions 0/193 dead transitions. [2024-06-14 13:09:22,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 193 transitions, 1907 flow [2024-06-14 13:09:22,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:22,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:22,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 13:09:22,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-14 13:09:22,044 INFO L175 Difference]: Start difference. First operand has 120 places, 143 transitions, 1309 flow. Second operand 9 states and 173 transitions. [2024-06-14 13:09:22,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 193 transitions, 1907 flow [2024-06-14 13:09:22,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 193 transitions, 1814 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:22,066 INFO L231 Difference]: Finished difference. Result has 124 places, 147 transitions, 1375 flow [2024-06-14 13:09:22,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1375, PETRI_PLACES=124, PETRI_TRANSITIONS=147} [2024-06-14 13:09:22,067 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-14 13:09:22,067 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 147 transitions, 1375 flow [2024-06-14 13:09:22,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-14 13:09:22,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:22,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:22,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:09:22,068 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:22,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:22,068 INFO L85 PathProgramCache]: Analyzing trace with hash -987411683, now seen corresponding path program 2 times [2024-06-14 13:09:22,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:22,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969084368] [2024-06-14 13:09:22,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:22,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:25,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:25,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969084368] [2024-06-14 13:09:25,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969084368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:25,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:25,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:25,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192683428] [2024-06-14 13:09:25,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:25,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:25,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:25,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:25,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:25,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:09:25,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 147 transitions, 1375 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-14 13:09:25,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:25,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:09:25,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:26,651 INFO L124 PetriNetUnfolderBase]: 1295/2085 cut-off events. [2024-06-14 13:09:26,651 INFO L125 PetriNetUnfolderBase]: For 42141/42174 co-relation queries the response was YES. [2024-06-14 13:09:26,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12033 conditions, 2085 events. 1295/2085 cut-off events. For 42141/42174 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10529 event pairs, 297 based on Foata normal form. 18/2058 useless extension candidates. Maximal degree in co-relation 11978. Up to 1758 conditions per place. [2024-06-14 13:09:26,666 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 115 selfloop transitions, 44 changer transitions 0/185 dead transitions. [2024-06-14 13:09:26,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 185 transitions, 1805 flow [2024-06-14 13:09:26,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:26,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:26,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 13:09:26,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 13:09:26,667 INFO L175 Difference]: Start difference. First operand has 124 places, 147 transitions, 1375 flow. Second operand 8 states and 153 transitions. [2024-06-14 13:09:26,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 185 transitions, 1805 flow [2024-06-14 13:09:26,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 185 transitions, 1708 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:26,700 INFO L231 Difference]: Finished difference. Result has 127 places, 147 transitions, 1376 flow [2024-06-14 13:09:26,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1376, PETRI_PLACES=127, PETRI_TRANSITIONS=147} [2024-06-14 13:09:26,701 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-14 13:09:26,701 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 147 transitions, 1376 flow [2024-06-14 13:09:26,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-14 13:09:26,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:26,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:26,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:09:26,701 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:26,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:26,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1498726405, now seen corresponding path program 3 times [2024-06-14 13:09:26,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:26,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123354207] [2024-06-14 13:09:26,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:26,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:29,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:29,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123354207] [2024-06-14 13:09:29,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123354207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:29,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:29,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:29,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623008647] [2024-06-14 13:09:29,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:29,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:29,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:29,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:29,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:30,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:09:30,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 147 transitions, 1376 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-14 13:09:30,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:30,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:09:30,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:31,383 INFO L124 PetriNetUnfolderBase]: 1319/2122 cut-off events. [2024-06-14 13:09:31,384 INFO L125 PetriNetUnfolderBase]: For 46123/46142 co-relation queries the response was YES. [2024-06-14 13:09:31,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12367 conditions, 2122 events. 1319/2122 cut-off events. For 46123/46142 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10741 event pairs, 308 based on Foata normal form. 6/2075 useless extension candidates. Maximal degree in co-relation 12310. Up to 1729 conditions per place. [2024-06-14 13:09:31,398 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 95 selfloop transitions, 61 changer transitions 0/182 dead transitions. [2024-06-14 13:09:31,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 182 transitions, 1810 flow [2024-06-14 13:09:31,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:31,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 13:09:31,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 13:09:31,399 INFO L175 Difference]: Start difference. First operand has 127 places, 147 transitions, 1376 flow. Second operand 8 states and 153 transitions. [2024-06-14 13:09:31,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 182 transitions, 1810 flow [2024-06-14 13:09:31,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 182 transitions, 1712 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 13:09:31,439 INFO L231 Difference]: Finished difference. Result has 128 places, 149 transitions, 1442 flow [2024-06-14 13:09:31,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1442, PETRI_PLACES=128, PETRI_TRANSITIONS=149} [2024-06-14 13:09:31,440 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-14 13:09:31,440 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 149 transitions, 1442 flow [2024-06-14 13:09:31,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-14 13:09:31,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:31,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:31,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:09:31,441 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:31,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:31,442 INFO L85 PathProgramCache]: Analyzing trace with hash -982758335, now seen corresponding path program 1 times [2024-06-14 13:09:31,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:31,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465865334] [2024-06-14 13:09:31,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:31,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:34,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:34,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465865334] [2024-06-14 13:09:34,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465865334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:34,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:34,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:34,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201602354] [2024-06-14 13:09:34,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:34,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:34,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:34,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:34,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:34,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:34,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 149 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) [2024-06-14 13:09:34,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:34,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:34,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:35,962 INFO L124 PetriNetUnfolderBase]: 1405/2236 cut-off events. [2024-06-14 13:09:35,963 INFO L125 PetriNetUnfolderBase]: For 46380/46392 co-relation queries the response was YES. [2024-06-14 13:09:35,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12906 conditions, 2236 events. 1405/2236 cut-off events. For 46380/46392 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11165 event pairs, 346 based on Foata normal form. 16/2246 useless extension candidates. Maximal degree in co-relation 12848. Up to 1990 conditions per place. [2024-06-14 13:09:35,978 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 151 selfloop transitions, 30 changer transitions 0/186 dead transitions. [2024-06-14 13:09:35,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 186 transitions, 1922 flow [2024-06-14 13:09:35,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:09:35,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 13:09:35,980 INFO L175 Difference]: Start difference. First operand has 128 places, 149 transitions, 1442 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:09:35,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 186 transitions, 1922 flow [2024-06-14 13:09:36,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 186 transitions, 1778 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:36,041 INFO L231 Difference]: Finished difference. Result has 130 places, 151 transitions, 1383 flow [2024-06-14 13:09:36,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1383, PETRI_PLACES=130, PETRI_TRANSITIONS=151} [2024-06-14 13:09:36,041 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-14 13:09:36,041 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 151 transitions, 1383 flow [2024-06-14 13:09:36,042 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) [2024-06-14 13:09:36,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:36,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:36,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:09:36,042 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:36,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:36,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1917312293, now seen corresponding path program 4 times [2024-06-14 13:09:36,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:36,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598153428] [2024-06-14 13:09:36,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:36,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:39,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:39,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598153428] [2024-06-14 13:09:39,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598153428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:39,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:39,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:39,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583867875] [2024-06-14 13:09:39,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:39,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:39,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:39,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:39,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:39,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:09:39,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 151 transitions, 1383 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-14 13:09:39,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:39,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:09:39,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:40,562 INFO L124 PetriNetUnfolderBase]: 1330/2138 cut-off events. [2024-06-14 13:09:40,562 INFO L125 PetriNetUnfolderBase]: For 51632/51670 co-relation queries the response was YES. [2024-06-14 13:09:40,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12678 conditions, 2138 events. 1330/2138 cut-off events. For 51632/51670 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10802 event pairs, 312 based on Foata normal form. 10/2088 useless extension candidates. Maximal degree in co-relation 12619. Up to 1745 conditions per place. [2024-06-14 13:09:40,611 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 95 selfloop transitions, 61 changer transitions 0/183 dead transitions. [2024-06-14 13:09:40,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 183 transitions, 1813 flow [2024-06-14 13:09:40,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:40,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:40,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:09:40,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 13:09:40,613 INFO L175 Difference]: Start difference. First operand has 130 places, 151 transitions, 1383 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:09:40,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 183 transitions, 1813 flow [2024-06-14 13:09:40,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 183 transitions, 1746 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:40,648 INFO L231 Difference]: Finished difference. Result has 132 places, 153 transitions, 1484 flow [2024-06-14 13:09:40,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1484, PETRI_PLACES=132, PETRI_TRANSITIONS=153} [2024-06-14 13:09:40,648 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2024-06-14 13:09:40,648 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 153 transitions, 1484 flow [2024-06-14 13:09:40,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-14 13:09:40,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:40,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:40,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:09:40,649 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:40,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:40,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1466861573, now seen corresponding path program 2 times [2024-06-14 13:09:40,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:40,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016034539] [2024-06-14 13:09:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:40,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:43,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:43,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016034539] [2024-06-14 13:09:43,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016034539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:43,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:43,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:43,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860230608] [2024-06-14 13:09:43,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:43,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:43,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:43,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:43,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:43,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:43,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 153 transitions, 1484 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) [2024-06-14 13:09:43,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:43,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:43,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:45,065 INFO L124 PetriNetUnfolderBase]: 1412/2251 cut-off events. [2024-06-14 13:09:45,065 INFO L125 PetriNetUnfolderBase]: For 51499/51529 co-relation queries the response was YES. [2024-06-14 13:09:45,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13204 conditions, 2251 events. 1412/2251 cut-off events. For 51499/51529 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 11265 event pairs, 340 based on Foata normal form. 24/2268 useless extension candidates. Maximal degree in co-relation 13144. Up to 2003 conditions per place. [2024-06-14 13:09:45,080 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 152 selfloop transitions, 30 changer transitions 0/187 dead transitions. [2024-06-14 13:09:45,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 187 transitions, 1962 flow [2024-06-14 13:09:45,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:45,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:45,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:09:45,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 13:09:45,082 INFO L175 Difference]: Start difference. First operand has 132 places, 153 transitions, 1484 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:09:45,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 187 transitions, 1962 flow [2024-06-14 13:09:45,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 187 transitions, 1814 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:45,122 INFO L231 Difference]: Finished difference. Result has 134 places, 155 transitions, 1425 flow [2024-06-14 13:09:45,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1425, PETRI_PLACES=134, PETRI_TRANSITIONS=155} [2024-06-14 13:09:45,122 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-14 13:09:45,122 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 155 transitions, 1425 flow [2024-06-14 13:09:45,123 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) [2024-06-14 13:09:45,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:45,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:45,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:09:45,123 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:45,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:45,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1964808991, now seen corresponding path program 3 times [2024-06-14 13:09:45,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:45,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413124914] [2024-06-14 13:09:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:45,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:48,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:48,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413124914] [2024-06-14 13:09:48,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413124914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:48,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:48,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:48,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280400714] [2024-06-14 13:09:48,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:48,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:48,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:48,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:48,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:48,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:48,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 155 transitions, 1425 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) [2024-06-14 13:09:48,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:48,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:48,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:49,442 INFO L124 PetriNetUnfolderBase]: 1432/2283 cut-off events. [2024-06-14 13:09:49,442 INFO L125 PetriNetUnfolderBase]: For 54421/54451 co-relation queries the response was YES. [2024-06-14 13:09:49,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13419 conditions, 2283 events. 1432/2283 cut-off events. For 54421/54451 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11431 event pairs, 346 based on Foata normal form. 24/2300 useless extension candidates. Maximal degree in co-relation 13358. Up to 2035 conditions per place. [2024-06-14 13:09:49,455 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 153 selfloop transitions, 31 changer transitions 0/189 dead transitions. [2024-06-14 13:09:49,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 189 transitions, 1911 flow [2024-06-14 13:09:49,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:49,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:49,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:09:49,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 13:09:49,456 INFO L175 Difference]: Start difference. First operand has 134 places, 155 transitions, 1425 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:09:49,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 189 transitions, 1911 flow [2024-06-14 13:09:49,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 189 transitions, 1840 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:49,494 INFO L231 Difference]: Finished difference. Result has 136 places, 157 transitions, 1449 flow [2024-06-14 13:09:49,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1354, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1449, PETRI_PLACES=136, PETRI_TRANSITIONS=157} [2024-06-14 13:09:49,495 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-14 13:09:49,495 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 157 transitions, 1449 flow [2024-06-14 13:09:49,495 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) [2024-06-14 13:09:49,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:49,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:49,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:09:49,496 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:49,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:49,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1973379871, now seen corresponding path program 4 times [2024-06-14 13:09:49,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:49,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197829982] [2024-06-14 13:09:49,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:49,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:52,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:52,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197829982] [2024-06-14 13:09:52,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197829982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:52,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:52,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:52,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534407773] [2024-06-14 13:09:52,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:52,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:52,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:52,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:52,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:52,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:52,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 157 transitions, 1449 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) [2024-06-14 13:09:52,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:52,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:52,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:53,596 INFO L124 PetriNetUnfolderBase]: 1424/2271 cut-off events. [2024-06-14 13:09:53,597 INFO L125 PetriNetUnfolderBase]: For 56835/56865 co-relation queries the response was YES. [2024-06-14 13:09:53,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13502 conditions, 2271 events. 1424/2271 cut-off events. For 56835/56865 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11396 event pairs, 308 based on Foata normal form. 24/2288 useless extension candidates. Maximal degree in co-relation 13440. Up to 1929 conditions per place. [2024-06-14 13:09:53,611 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 149 selfloop transitions, 38 changer transitions 0/192 dead transitions. [2024-06-14 13:09:53,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 192 transitions, 1947 flow [2024-06-14 13:09:53,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:53,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:53,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:09:53,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 13:09:53,612 INFO L175 Difference]: Start difference. First operand has 136 places, 157 transitions, 1449 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:09:53,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 192 transitions, 1947 flow [2024-06-14 13:09:53,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 192 transitions, 1870 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:53,657 INFO L231 Difference]: Finished difference. Result has 138 places, 159 transitions, 1485 flow [2024-06-14 13:09:53,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1485, PETRI_PLACES=138, PETRI_TRANSITIONS=159} [2024-06-14 13:09:53,658 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-14 13:09:53,658 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 159 transitions, 1485 flow [2024-06-14 13:09:53,659 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) [2024-06-14 13:09:53,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:53,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:53,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:09:53,659 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)] === [2024-06-14 13:09:53,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:53,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1921795946, now seen corresponding path program 1 times [2024-06-14 13:09:53,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:53,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841788376] [2024-06-14 13:09:53,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:53,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:55,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:55,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:55,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841788376] [2024-06-14 13:09:55,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841788376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:55,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:55,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:09:55,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739112650] [2024-06-14 13:09:55,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:55,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:09:55,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:55,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:09:55,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:09:55,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:09:55,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 159 transitions, 1485 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) [2024-06-14 13:09:55,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:55,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:09:55,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:56,381 INFO L124 PetriNetUnfolderBase]: 1320/2152 cut-off events. [2024-06-14 13:09:56,381 INFO L125 PetriNetUnfolderBase]: For 57923/57957 co-relation queries the response was YES. [2024-06-14 13:09:56,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12997 conditions, 2152 events. 1320/2152 cut-off events. For 57923/57957 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11106 event pairs, 343 based on Foata normal form. 34/2181 useless extension candidates. Maximal degree in co-relation 12934. Up to 1925 conditions per place. [2024-06-14 13:09:56,403 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 142 selfloop transitions, 10 changer transitions 0/173 dead transitions. [2024-06-14 13:09:56,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 173 transitions, 1839 flow [2024-06-14 13:09:56,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:09:56,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:09:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-14 13:09:56,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-14 13:09:56,405 INFO L175 Difference]: Start difference. First operand has 138 places, 159 transitions, 1485 flow. Second operand 5 states and 91 transitions. [2024-06-14 13:09:56,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 173 transitions, 1839 flow [2024-06-14 13:09:56,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 173 transitions, 1744 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:56,461 INFO L231 Difference]: Finished difference. Result has 137 places, 162 transitions, 1442 flow [2024-06-14 13:09:56,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1442, PETRI_PLACES=137, PETRI_TRANSITIONS=162} [2024-06-14 13:09:56,462 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-14 13:09:56,462 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 162 transitions, 1442 flow [2024-06-14 13:09:56,462 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) [2024-06-14 13:09:56,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:56,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:56,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:09:56,463 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:56,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:56,463 INFO L85 PathProgramCache]: Analyzing trace with hash -151744758, now seen corresponding path program 1 times [2024-06-14 13:09:56,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:56,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048672032] [2024-06-14 13:09:56,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:56,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:00,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:00,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048672032] [2024-06-14 13:10:00,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048672032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:00,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:00,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:00,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524046684] [2024-06-14 13:10:00,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:00,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:00,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:00,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:00,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:00,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:00,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 162 transitions, 1442 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) [2024-06-14 13:10:00,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:00,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:00,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:02,018 INFO L124 PetriNetUnfolderBase]: 1562/2505 cut-off events. [2024-06-14 13:10:02,018 INFO L125 PetriNetUnfolderBase]: For 73002/73014 co-relation queries the response was YES. [2024-06-14 13:10:02,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15174 conditions, 2505 events. 1562/2505 cut-off events. For 73002/73014 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12953 event pairs, 249 based on Foata normal form. 24/2526 useless extension candidates. Maximal degree in co-relation 15110. Up to 1924 conditions per place. [2024-06-14 13:10:02,037 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 192 selfloop transitions, 28 changer transitions 0/225 dead transitions. [2024-06-14 13:10:02,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 225 transitions, 2244 flow [2024-06-14 13:10:02,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:10:02,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:10:02,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-14 13:10:02,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-14 13:10:02,038 INFO L175 Difference]: Start difference. First operand has 137 places, 162 transitions, 1442 flow. Second operand 10 states and 186 transitions. [2024-06-14 13:10:02,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 225 transitions, 2244 flow [2024-06-14 13:10:02,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 225 transitions, 2214 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 13:10:02,094 INFO L231 Difference]: Finished difference. Result has 146 places, 167 transitions, 1551 flow [2024-06-14 13:10:02,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1551, PETRI_PLACES=146, PETRI_TRANSITIONS=167} [2024-06-14 13:10:02,094 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-14 13:10:02,094 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 167 transitions, 1551 flow [2024-06-14 13:10:02,095 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) [2024-06-14 13:10:02,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:02,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:02,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:10:02,095 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)] === [2024-06-14 13:10:02,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:02,095 INFO L85 PathProgramCache]: Analyzing trace with hash 227791662, now seen corresponding path program 2 times [2024-06-14 13:10:02,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:02,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293909499] [2024-06-14 13:10:02,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:02,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:05,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:05,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293909499] [2024-06-14 13:10:05,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293909499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:05,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:05,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:05,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948162328] [2024-06-14 13:10:05,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:05,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:05,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:05,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:05,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:05,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:05,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 167 transitions, 1551 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) [2024-06-14 13:10:05,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:05,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:05,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:07,392 INFO L124 PetriNetUnfolderBase]: 1602/2589 cut-off events. [2024-06-14 13:10:07,392 INFO L125 PetriNetUnfolderBase]: For 78322/78334 co-relation queries the response was YES. [2024-06-14 13:10:07,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15754 conditions, 2589 events. 1602/2589 cut-off events. For 78322/78334 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13656 event pairs, 372 based on Foata normal form. 28/2614 useless extension candidates. Maximal degree in co-relation 15687. Up to 2238 conditions per place. [2024-06-14 13:10:07,411 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 183 selfloop transitions, 26 changer transitions 0/214 dead transitions. [2024-06-14 13:10:07,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 214 transitions, 2138 flow [2024-06-14 13:10:07,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:07,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:07,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:10:07,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 13:10:07,413 INFO L175 Difference]: Start difference. First operand has 146 places, 167 transitions, 1551 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:10:07,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 214 transitions, 2138 flow [2024-06-14 13:10:07,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 214 transitions, 2084 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:10:07,480 INFO L231 Difference]: Finished difference. Result has 150 places, 168 transitions, 1577 flow [2024-06-14 13:10:07,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1497, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1577, PETRI_PLACES=150, PETRI_TRANSITIONS=168} [2024-06-14 13:10:07,481 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-14 13:10:07,481 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 168 transitions, 1577 flow [2024-06-14 13:10:07,481 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) [2024-06-14 13:10:07,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:07,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:07,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:10:07,482 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:07,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:07,482 INFO L85 PathProgramCache]: Analyzing trace with hash -149870808, now seen corresponding path program 3 times [2024-06-14 13:10:07,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:07,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530395513] [2024-06-14 13:10:07,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:07,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:11,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:11,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530395513] [2024-06-14 13:10:11,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530395513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:11,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:11,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:11,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911115919] [2024-06-14 13:10:11,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:11,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:11,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:11,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:11,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:11,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:11,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 168 transitions, 1577 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) [2024-06-14 13:10:11,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:11,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:11,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:12,621 INFO L124 PetriNetUnfolderBase]: 1582/2557 cut-off events. [2024-06-14 13:10:12,621 INFO L125 PetriNetUnfolderBase]: For 76118/76130 co-relation queries the response was YES. [2024-06-14 13:10:12,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15459 conditions, 2557 events. 1582/2557 cut-off events. For 76118/76130 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13434 event pairs, 338 based on Foata normal form. 24/2578 useless extension candidates. Maximal degree in co-relation 15390. Up to 2094 conditions per place. [2024-06-14 13:10:12,641 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 188 selfloop transitions, 27 changer transitions 0/220 dead transitions. [2024-06-14 13:10:12,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 220 transitions, 2218 flow [2024-06-14 13:10:12,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:12,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:12,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 13:10:12,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 13:10:12,643 INFO L175 Difference]: Start difference. First operand has 150 places, 168 transitions, 1577 flow. Second operand 9 states and 167 transitions. [2024-06-14 13:10:12,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 220 transitions, 2218 flow [2024-06-14 13:10:12,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 220 transitions, 2129 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 13:10:12,709 INFO L231 Difference]: Finished difference. Result has 153 places, 171 transitions, 1606 flow [2024-06-14 13:10:12,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1606, PETRI_PLACES=153, PETRI_TRANSITIONS=171} [2024-06-14 13:10:12,709 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 109 predicate places. [2024-06-14 13:10:12,709 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 171 transitions, 1606 flow [2024-06-14 13:10:12,710 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) [2024-06-14 13:10:12,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:12,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:12,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:10:12,710 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)] === [2024-06-14 13:10:12,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:12,711 INFO L85 PathProgramCache]: Analyzing trace with hash -783972154, now seen corresponding path program 4 times [2024-06-14 13:10:12,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:12,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570188399] [2024-06-14 13:10:12,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:12,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:16,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:16,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570188399] [2024-06-14 13:10:16,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570188399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:16,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:16,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:16,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268450344] [2024-06-14 13:10:16,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:16,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:16,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:16,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:16,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:16,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:16,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 171 transitions, 1606 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) [2024-06-14 13:10:16,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:16,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:16,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:18,288 INFO L124 PetriNetUnfolderBase]: 1650/2682 cut-off events. [2024-06-14 13:10:18,288 INFO L125 PetriNetUnfolderBase]: For 82873/82875 co-relation queries the response was YES. [2024-06-14 13:10:18,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15991 conditions, 2682 events. 1650/2682 cut-off events. For 82873/82875 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14375 event pairs, 394 based on Foata normal form. 16/2692 useless extension candidates. Maximal degree in co-relation 15920. Up to 2162 conditions per place. [2024-06-14 13:10:18,307 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 152 selfloop transitions, 56 changer transitions 0/213 dead transitions. [2024-06-14 13:10:18,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 213 transitions, 2170 flow [2024-06-14 13:10:18,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:18,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:18,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 13:10:18,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 13:10:18,309 INFO L175 Difference]: Start difference. First operand has 153 places, 171 transitions, 1606 flow. Second operand 9 states and 168 transitions. [2024-06-14 13:10:18,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 213 transitions, 2170 flow [2024-06-14 13:10:18,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 213 transitions, 2138 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 13:10:18,375 INFO L231 Difference]: Finished difference. Result has 157 places, 172 transitions, 1713 flow [2024-06-14 13:10:18,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1713, PETRI_PLACES=157, PETRI_TRANSITIONS=172} [2024-06-14 13:10:18,375 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-14 13:10:18,375 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 172 transitions, 1713 flow [2024-06-14 13:10:18,376 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) [2024-06-14 13:10:18,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:18,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:18,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:10:18,376 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:18,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:18,376 INFO L85 PathProgramCache]: Analyzing trace with hash -784120024, now seen corresponding path program 5 times [2024-06-14 13:10:18,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:18,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711783577] [2024-06-14 13:10:18,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:18,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:22,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:22,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711783577] [2024-06-14 13:10:22,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711783577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:22,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:22,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:22,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816518683] [2024-06-14 13:10:22,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:22,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:22,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:22,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:22,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:22,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:22,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 172 transitions, 1713 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) [2024-06-14 13:10:22,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:22,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:22,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:23,594 INFO L124 PetriNetUnfolderBase]: 1794/2938 cut-off events. [2024-06-14 13:10:23,595 INFO L125 PetriNetUnfolderBase]: For 95372/95374 co-relation queries the response was YES. [2024-06-14 13:10:23,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17968 conditions, 2938 events. 1794/2938 cut-off events. For 95372/95374 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16381 event pairs, 420 based on Foata normal form. 12/2944 useless extension candidates. Maximal degree in co-relation 17895. Up to 2152 conditions per place. [2024-06-14 13:10:23,615 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 158 selfloop transitions, 58 changer transitions 0/221 dead transitions. [2024-06-14 13:10:23,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 221 transitions, 2467 flow [2024-06-14 13:10:23,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:23,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:23,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 13:10:23,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 13:10:23,617 INFO L175 Difference]: Start difference. First operand has 157 places, 172 transitions, 1713 flow. Second operand 9 states and 172 transitions. [2024-06-14 13:10:23,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 221 transitions, 2467 flow [2024-06-14 13:10:23,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 221 transitions, 2346 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 13:10:23,703 INFO L231 Difference]: Finished difference. Result has 160 places, 175 transitions, 1770 flow [2024-06-14 13:10:23,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1770, PETRI_PLACES=160, PETRI_TRANSITIONS=175} [2024-06-14 13:10:23,703 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-14 13:10:23,704 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 175 transitions, 1770 flow [2024-06-14 13:10:23,704 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) [2024-06-14 13:10:23,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:23,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:23,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:10:23,704 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:23,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:23,704 INFO L85 PathProgramCache]: Analyzing trace with hash -400951024, now seen corresponding path program 6 times [2024-06-14 13:10:23,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:23,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600841795] [2024-06-14 13:10:23,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:23,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:27,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:27,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600841795] [2024-06-14 13:10:27,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600841795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:27,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:27,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:27,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590107883] [2024-06-14 13:10:27,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:27,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:27,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:27,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:27,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:27,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:27,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 175 transitions, 1770 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) [2024-06-14 13:10:27,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:27,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:27,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:29,097 INFO L124 PetriNetUnfolderBase]: 1766/2894 cut-off events. [2024-06-14 13:10:29,097 INFO L125 PetriNetUnfolderBase]: For 93944/93946 co-relation queries the response was YES. [2024-06-14 13:10:29,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17429 conditions, 2894 events. 1766/2894 cut-off events. For 93944/93946 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16079 event pairs, 424 based on Foata normal form. 16/2904 useless extension candidates. Maximal degree in co-relation 17354. Up to 2362 conditions per place. [2024-06-14 13:10:29,119 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 154 selfloop transitions, 58 changer transitions 0/217 dead transitions. [2024-06-14 13:10:29,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 217 transitions, 2347 flow [2024-06-14 13:10:29,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:29,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:29,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 13:10:29,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 13:10:29,121 INFO L175 Difference]: Start difference. First operand has 160 places, 175 transitions, 1770 flow. Second operand 9 states and 167 transitions. [2024-06-14 13:10:29,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 217 transitions, 2347 flow [2024-06-14 13:10:29,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 217 transitions, 2244 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 13:10:29,223 INFO L231 Difference]: Finished difference. Result has 164 places, 176 transitions, 1815 flow [2024-06-14 13:10:29,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1815, PETRI_PLACES=164, PETRI_TRANSITIONS=176} [2024-06-14 13:10:29,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-14 13:10:29,224 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 176 transitions, 1815 flow [2024-06-14 13:10:29,224 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) [2024-06-14 13:10:29,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:29,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:29,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:10:29,224 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:29,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:29,225 INFO L85 PathProgramCache]: Analyzing trace with hash -400735822, now seen corresponding path program 1 times [2024-06-14 13:10:29,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:29,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819363888] [2024-06-14 13:10:29,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:29,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:32,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:32,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819363888] [2024-06-14 13:10:32,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819363888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:32,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:32,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:32,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682589323] [2024-06-14 13:10:32,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:32,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:32,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:32,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:32,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:32,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:32,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 176 transitions, 1815 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) [2024-06-14 13:10:32,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:32,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:32,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:34,340 INFO L124 PetriNetUnfolderBase]: 1814/2978 cut-off events. [2024-06-14 13:10:34,340 INFO L125 PetriNetUnfolderBase]: For 96117/96119 co-relation queries the response was YES. [2024-06-14 13:10:34,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17968 conditions, 2978 events. 1814/2978 cut-off events. For 96117/96119 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16691 event pairs, 414 based on Foata normal form. 12/2984 useless extension candidates. Maximal degree in co-relation 17891. Up to 2116 conditions per place. [2024-06-14 13:10:34,362 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 154 selfloop transitions, 62 changer transitions 0/221 dead transitions. [2024-06-14 13:10:34,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 221 transitions, 2415 flow [2024-06-14 13:10:34,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:34,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:34,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 13:10:34,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 13:10:34,364 INFO L175 Difference]: Start difference. First operand has 164 places, 176 transitions, 1815 flow. Second operand 9 states and 169 transitions. [2024-06-14 13:10:34,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 221 transitions, 2415 flow [2024-06-14 13:10:34,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 221 transitions, 2300 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 13:10:34,462 INFO L231 Difference]: Finished difference. Result has 166 places, 177 transitions, 1854 flow [2024-06-14 13:10:34,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1854, PETRI_PLACES=166, PETRI_TRANSITIONS=177} [2024-06-14 13:10:34,462 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-14 13:10:34,462 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 177 transitions, 1854 flow [2024-06-14 13:10:34,463 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) [2024-06-14 13:10:34,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:34,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:34,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:10:34,463 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:34,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:34,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2082619220, now seen corresponding path program 7 times [2024-06-14 13:10:34,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:34,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501385136] [2024-06-14 13:10:34,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:34,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:37,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:37,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501385136] [2024-06-14 13:10:37,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501385136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:37,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:37,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:37,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557327024] [2024-06-14 13:10:37,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:37,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:37,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:37,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:37,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:37,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:37,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 177 transitions, 1854 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) [2024-06-14 13:10:37,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:37,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:37,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:39,587 INFO L124 PetriNetUnfolderBase]: 1882/3093 cut-off events. [2024-06-14 13:10:39,587 INFO L125 PetriNetUnfolderBase]: For 105179/105196 co-relation queries the response was YES. [2024-06-14 13:10:39,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18727 conditions, 3093 events. 1882/3093 cut-off events. For 105179/105196 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17585 event pairs, 452 based on Foata normal form. 20/3100 useless extension candidates. Maximal degree in co-relation 18649. Up to 2562 conditions per place. [2024-06-14 13:10:39,608 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 151 selfloop transitions, 60 changer transitions 0/216 dead transitions. [2024-06-14 13:10:39,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 216 transitions, 2422 flow [2024-06-14 13:10:39,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:39,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:10:39,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:10:39,610 INFO L175 Difference]: Start difference. First operand has 166 places, 177 transitions, 1854 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:10:39,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 216 transitions, 2422 flow [2024-06-14 13:10:39,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 216 transitions, 2282 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:10:39,694 INFO L231 Difference]: Finished difference. Result has 168 places, 178 transitions, 1867 flow [2024-06-14 13:10:39,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1714, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1867, PETRI_PLACES=168, PETRI_TRANSITIONS=178} [2024-06-14 13:10:39,695 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-14 13:10:39,695 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 178 transitions, 1867 flow [2024-06-14 13:10:39,695 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) [2024-06-14 13:10:39,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:39,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:39,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:10:39,695 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:39,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:39,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1990645488, now seen corresponding path program 8 times [2024-06-14 13:10:39,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:39,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995196736] [2024-06-14 13:10:39,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:39,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:43,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:43,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995196736] [2024-06-14 13:10:43,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995196736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:43,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:43,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:43,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902920745] [2024-06-14 13:10:43,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:43,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:43,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:43,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:43,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:43,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:43,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 178 transitions, 1867 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) [2024-06-14 13:10:43,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:43,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:43,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:44,855 INFO L124 PetriNetUnfolderBase]: 1950/3221 cut-off events. [2024-06-14 13:10:44,855 INFO L125 PetriNetUnfolderBase]: For 111164/111181 co-relation queries the response was YES. [2024-06-14 13:10:44,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19327 conditions, 3221 events. 1950/3221 cut-off events. For 111164/111181 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18639 event pairs, 470 based on Foata normal form. 20/3228 useless extension candidates. Maximal degree in co-relation 19248. Up to 2678 conditions per place. [2024-06-14 13:10:44,877 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 156 selfloop transitions, 56 changer transitions 0/217 dead transitions. [2024-06-14 13:10:44,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 217 transitions, 2439 flow [2024-06-14 13:10:44,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:44,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:44,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:10:44,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 13:10:44,878 INFO L175 Difference]: Start difference. First operand has 168 places, 178 transitions, 1867 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:10:44,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 217 transitions, 2439 flow [2024-06-14 13:10:44,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 217 transitions, 2304 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:10:44,980 INFO L231 Difference]: Finished difference. Result has 170 places, 179 transitions, 1879 flow [2024-06-14 13:10:44,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1732, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1879, PETRI_PLACES=170, PETRI_TRANSITIONS=179} [2024-06-14 13:10:44,981 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-14 13:10:44,981 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 179 transitions, 1879 flow [2024-06-14 13:10:44,981 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) [2024-06-14 13:10:44,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:44,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:44,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:10:44,982 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:44,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:44,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1996007868, now seen corresponding path program 9 times [2024-06-14 13:10:44,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:44,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390668680] [2024-06-14 13:10:44,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:44,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:48,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:48,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390668680] [2024-06-14 13:10:48,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390668680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:48,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:48,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:48,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045769154] [2024-06-14 13:10:48,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:48,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:48,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:48,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:48,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:48,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:48,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 179 transitions, 1879 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) [2024-06-14 13:10:48,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:48,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:48,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:50,320 INFO L124 PetriNetUnfolderBase]: 2018/3349 cut-off events. [2024-06-14 13:10:50,321 INFO L125 PetriNetUnfolderBase]: For 117767/117784 co-relation queries the response was YES. [2024-06-14 13:10:50,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19929 conditions, 3349 events. 2018/3349 cut-off events. For 117767/117784 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19675 event pairs, 488 based on Foata normal form. 20/3356 useless extension candidates. Maximal degree in co-relation 19849. Up to 2794 conditions per place. [2024-06-14 13:10:50,350 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 156 selfloop transitions, 57 changer transitions 0/218 dead transitions. [2024-06-14 13:10:50,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 218 transitions, 2455 flow [2024-06-14 13:10:50,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:50,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:10:50,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 13:10:50,351 INFO L175 Difference]: Start difference. First operand has 170 places, 179 transitions, 1879 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:10:50,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 218 transitions, 2455 flow [2024-06-14 13:10:50,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 218 transitions, 2326 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 13:10:50,465 INFO L231 Difference]: Finished difference. Result has 172 places, 180 transitions, 1901 flow [2024-06-14 13:10:50,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1901, PETRI_PLACES=172, PETRI_TRANSITIONS=180} [2024-06-14 13:10:50,466 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-14 13:10:50,466 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 180 transitions, 1901 flow [2024-06-14 13:10:50,466 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) [2024-06-14 13:10:50,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:50,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:50,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:10:50,467 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:50,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:50,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1996155738, now seen corresponding path program 10 times [2024-06-14 13:10:50,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:50,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861350027] [2024-06-14 13:10:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:50,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:53,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:53,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861350027] [2024-06-14 13:10:53,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861350027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:53,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:53,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:53,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448382021] [2024-06-14 13:10:53,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:53,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:53,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:53,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:53,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:53,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:53,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 180 transitions, 1901 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) [2024-06-14 13:10:53,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:53,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:53,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:55,542 INFO L124 PetriNetUnfolderBase]: 2038/3389 cut-off events. [2024-06-14 13:10:55,543 INFO L125 PetriNetUnfolderBase]: For 117021/117038 co-relation queries the response was YES. [2024-06-14 13:10:55,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19967 conditions, 3389 events. 2038/3389 cut-off events. For 117021/117038 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19955 event pairs, 478 based on Foata normal form. 16/3392 useless extension candidates. Maximal degree in co-relation 19886. Up to 2504 conditions per place. [2024-06-14 13:10:55,571 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 158 selfloop transitions, 61 changer transitions 0/224 dead transitions. [2024-06-14 13:10:55,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 224 transitions, 2539 flow [2024-06-14 13:10:55,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:55,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:55,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:10:55,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 13:10:55,572 INFO L175 Difference]: Start difference. First operand has 172 places, 180 transitions, 1901 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:10:55,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 224 transitions, 2539 flow [2024-06-14 13:10:55,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 224 transitions, 2406 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:10:55,691 INFO L231 Difference]: Finished difference. Result has 175 places, 183 transitions, 1976 flow [2024-06-14 13:10:55,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1768, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1976, PETRI_PLACES=175, PETRI_TRANSITIONS=183} [2024-06-14 13:10:55,691 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-14 13:10:55,691 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 183 transitions, 1976 flow [2024-06-14 13:10:55,692 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) [2024-06-14 13:10:55,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:55,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:55,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:10:55,692 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)] === [2024-06-14 13:10:55,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:55,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1990430286, now seen corresponding path program 2 times [2024-06-14 13:10:55,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:55,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164393442] [2024-06-14 13:10:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:55,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:59,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:59,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164393442] [2024-06-14 13:10:59,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164393442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:59,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:59,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:59,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883076755] [2024-06-14 13:10:59,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:59,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:59,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:59,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:59,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:59,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:59,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 183 transitions, 1976 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) [2024-06-14 13:10:59,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:59,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:59,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:00,849 INFO L124 PetriNetUnfolderBase]: 2086/3485 cut-off events. [2024-06-14 13:11:00,849 INFO L125 PetriNetUnfolderBase]: For 123026/123043 co-relation queries the response was YES. [2024-06-14 13:11:00,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20520 conditions, 3485 events. 2086/3485 cut-off events. For 123026/123043 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20759 event pairs, 498 based on Foata normal form. 16/3488 useless extension candidates. Maximal degree in co-relation 20437. Up to 2700 conditions per place. [2024-06-14 13:11:00,878 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 161 selfloop transitions, 59 changer transitions 0/225 dead transitions. [2024-06-14 13:11:00,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 225 transitions, 2586 flow [2024-06-14 13:11:00,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:11:00,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:11:00,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 13:11:00,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 13:11:00,880 INFO L175 Difference]: Start difference. First operand has 175 places, 183 transitions, 1976 flow. Second operand 9 states and 166 transitions. [2024-06-14 13:11:00,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 225 transitions, 2586 flow [2024-06-14 13:11:01,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 225 transitions, 2477 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:11:01,005 INFO L231 Difference]: Finished difference. Result has 179 places, 184 transitions, 2025 flow [2024-06-14 13:11:01,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2025, PETRI_PLACES=179, PETRI_TRANSITIONS=184} [2024-06-14 13:11:01,006 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-14 13:11:01,006 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 184 transitions, 2025 flow [2024-06-14 13:11:01,006 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) [2024-06-14 13:11:01,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:01,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:01,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:11:01,006 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)] === [2024-06-14 13:11:01,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:01,007 INFO L85 PathProgramCache]: Analyzing trace with hash 246934042, now seen corresponding path program 3 times [2024-06-14 13:11:01,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:01,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137647815] [2024-06-14 13:11:01,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:01,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:04,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:04,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137647815] [2024-06-14 13:11:04,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137647815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:04,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:04,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:04,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915526370] [2024-06-14 13:11:04,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:04,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:04,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:04,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:04,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:04,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:04,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 184 transitions, 2025 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) [2024-06-14 13:11:04,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:04,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:04,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:05,827 INFO L124 PetriNetUnfolderBase]: 2134/3581 cut-off events. [2024-06-14 13:11:05,828 INFO L125 PetriNetUnfolderBase]: For 129071/129088 co-relation queries the response was YES. [2024-06-14 13:11:05,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21193 conditions, 3581 events. 2134/3581 cut-off events. For 129071/129088 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 21637 event pairs, 516 based on Foata normal form. 16/3584 useless extension candidates. Maximal degree in co-relation 21108. Up to 2896 conditions per place. [2024-06-14 13:11:05,853 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 159 selfloop transitions, 62 changer transitions 0/226 dead transitions. [2024-06-14 13:11:05,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 226 transitions, 2639 flow [2024-06-14 13:11:05,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:11:05,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:11:05,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:11:05,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 13:11:05,855 INFO L175 Difference]: Start difference. First operand has 179 places, 184 transitions, 2025 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:11:05,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 226 transitions, 2639 flow [2024-06-14 13:11:05,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 226 transitions, 2495 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 13:11:05,985 INFO L231 Difference]: Finished difference. Result has 181 places, 185 transitions, 2047 flow [2024-06-14 13:11:05,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1881, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2047, PETRI_PLACES=181, PETRI_TRANSITIONS=185} [2024-06-14 13:11:05,986 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-14 13:11:05,986 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 185 transitions, 2047 flow [2024-06-14 13:11:05,986 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) [2024-06-14 13:11:05,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:05,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:05,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:11:05,987 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:05,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:05,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1045235348, now seen corresponding path program 4 times [2024-06-14 13:11:05,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:05,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336003260] [2024-06-14 13:11:05,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:05,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:06,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:09,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:09,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336003260] [2024-06-14 13:11:09,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336003260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:09,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:09,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:09,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474498331] [2024-06-14 13:11:09,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:09,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:09,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:09,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:09,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:09,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:09,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 185 transitions, 2047 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) [2024-06-14 13:11:09,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:09,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:09,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:10,843 INFO L124 PetriNetUnfolderBase]: 2114/3549 cut-off events. [2024-06-14 13:11:10,843 INFO L125 PetriNetUnfolderBase]: For 123461/123478 co-relation queries the response was YES. [2024-06-14 13:11:10,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20517 conditions, 3549 events. 2114/3549 cut-off events. For 123461/123478 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21288 event pairs, 451 based on Foata normal form. 16/3552 useless extension candidates. Maximal degree in co-relation 20431. Up to 1958 conditions per place. [2024-06-14 13:11:10,869 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 147 selfloop transitions, 74 changer transitions 0/226 dead transitions. [2024-06-14 13:11:10,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 226 transitions, 2545 flow [2024-06-14 13:11:10,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:11:10,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:11:10,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:11:10,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 13:11:10,870 INFO L175 Difference]: Start difference. First operand has 181 places, 185 transitions, 2047 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:11:10,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 226 transitions, 2545 flow [2024-06-14 13:11:10,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 226 transitions, 2393 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:11:10,999 INFO L231 Difference]: Finished difference. Result has 182 places, 184 transitions, 1963 flow [2024-06-14 13:11:10,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1811, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1963, PETRI_PLACES=182, PETRI_TRANSITIONS=184} [2024-06-14 13:11:11,000 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-14 13:11:11,000 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 184 transitions, 1963 flow [2024-06-14 13:11:11,000 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) [2024-06-14 13:11:11,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:11,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:11,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:11:11,000 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:11,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:11,001 INFO L85 PathProgramCache]: Analyzing trace with hash -594408107, now seen corresponding path program 1 times [2024-06-14 13:11:11,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:11,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605591830] [2024-06-14 13:11:11,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:11,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:13,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:13,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605591830] [2024-06-14 13:11:13,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605591830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:13,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:13,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:11:13,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705414198] [2024-06-14 13:11:13,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:13,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:11:13,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:13,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:11:13,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:11:13,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:11:13,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 184 transitions, 1963 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:11:13,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:13,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:11:13,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:15,132 INFO L124 PetriNetUnfolderBase]: 2022/3443 cut-off events. [2024-06-14 13:11:15,132 INFO L125 PetriNetUnfolderBase]: For 123753/123787 co-relation queries the response was YES. [2024-06-14 13:11:15,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20336 conditions, 3443 events. 2022/3443 cut-off events. For 123753/123787 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 21185 event pairs, 481 based on Foata normal form. 36/3450 useless extension candidates. Maximal degree in co-relation 20249. Up to 3049 conditions per place. [2024-06-14 13:11:15,163 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 156 selfloop transitions, 41 changer transitions 0/218 dead transitions. [2024-06-14 13:11:15,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 218 transitions, 2604 flow [2024-06-14 13:11:15,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:15,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:15,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:11:15,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:11:15,165 INFO L175 Difference]: Start difference. First operand has 182 places, 184 transitions, 1963 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:11:15,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 218 transitions, 2604 flow [2024-06-14 13:11:15,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 218 transitions, 2328 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-14 13:11:15,301 INFO L231 Difference]: Finished difference. Result has 180 places, 195 transitions, 1886 flow [2024-06-14 13:11:15,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1886, PETRI_PLACES=180, PETRI_TRANSITIONS=195} [2024-06-14 13:11:15,302 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-14 13:11:15,302 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 195 transitions, 1886 flow [2024-06-14 13:11:15,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:11:15,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:15,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:15,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:11:15,303 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:15,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:15,303 INFO L85 PathProgramCache]: Analyzing trace with hash 116662023, now seen corresponding path program 2 times [2024-06-14 13:11:15,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:15,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540322518] [2024-06-14 13:11:15,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:15,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:17,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:17,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540322518] [2024-06-14 13:11:17,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540322518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:17,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:17,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:11:17,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715500004] [2024-06-14 13:11:17,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:17,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:11:17,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:17,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:11:17,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:11:17,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:11:17,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 195 transitions, 1886 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:11:17,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:17,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:11:17,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:19,126 INFO L124 PetriNetUnfolderBase]: 2008/3413 cut-off events. [2024-06-14 13:11:19,126 INFO L125 PetriNetUnfolderBase]: For 123603/123625 co-relation queries the response was YES. [2024-06-14 13:11:19,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19471 conditions, 3413 events. 2008/3413 cut-off events. For 123603/123625 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20979 event pairs, 488 based on Foata normal form. 22/3390 useless extension candidates. Maximal degree in co-relation 19386. Up to 3021 conditions per place. [2024-06-14 13:11:19,155 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 148 selfloop transitions, 43 changer transitions 0/212 dead transitions. [2024-06-14 13:11:19,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 212 transitions, 2424 flow [2024-06-14 13:11:19,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:11:19,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:11:19,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:11:19,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 13:11:19,156 INFO L175 Difference]: Start difference. First operand has 180 places, 195 transitions, 1886 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:11:19,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 212 transitions, 2424 flow [2024-06-14 13:11:19,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 212 transitions, 2380 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 13:11:19,302 INFO L231 Difference]: Finished difference. Result has 184 places, 198 transitions, 1972 flow [2024-06-14 13:11:19,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1842, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1972, PETRI_PLACES=184, PETRI_TRANSITIONS=198} [2024-06-14 13:11:19,302 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-14 13:11:19,302 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 198 transitions, 1972 flow [2024-06-14 13:11:19,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:11:19,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:19,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:19,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:11:19,302 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:19,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:19,303 INFO L85 PathProgramCache]: Analyzing trace with hash 116246313, now seen corresponding path program 3 times [2024-06-14 13:11:19,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:19,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926306733] [2024-06-14 13:11:19,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:19,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:21,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:21,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926306733] [2024-06-14 13:11:21,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926306733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:21,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:21,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:11:21,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29660638] [2024-06-14 13:11:21,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:21,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:11:21,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:21,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:11:21,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:11:22,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:11:22,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 198 transitions, 1972 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:11:22,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:22,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:11:22,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:23,033 INFO L124 PetriNetUnfolderBase]: 1997/3410 cut-off events. [2024-06-14 13:11:23,033 INFO L125 PetriNetUnfolderBase]: For 125514/125525 co-relation queries the response was YES. [2024-06-14 13:11:23,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19766 conditions, 3410 events. 1997/3410 cut-off events. For 125514/125525 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21029 event pairs, 478 based on Foata normal form. 13/3394 useless extension candidates. Maximal degree in co-relation 19679. Up to 3027 conditions per place. [2024-06-14 13:11:23,061 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 157 selfloop transitions, 39 changer transitions 0/217 dead transitions. [2024-06-14 13:11:23,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 217 transitions, 2416 flow [2024-06-14 13:11:23,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:11:23,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:11:23,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-14 13:11:23,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 13:11:23,062 INFO L175 Difference]: Start difference. First operand has 184 places, 198 transitions, 1972 flow. Second operand 6 states and 112 transitions. [2024-06-14 13:11:23,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 217 transitions, 2416 flow [2024-06-14 13:11:23,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 217 transitions, 2292 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 13:11:23,208 INFO L231 Difference]: Finished difference. Result has 186 places, 198 transitions, 1941 flow [2024-06-14 13:11:23,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1941, PETRI_PLACES=186, PETRI_TRANSITIONS=198} [2024-06-14 13:11:23,209 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-14 13:11:23,209 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 198 transitions, 1941 flow [2024-06-14 13:11:23,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:11:23,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:23,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:23,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:11:23,209 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:23,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:23,210 INFO L85 PathProgramCache]: Analyzing trace with hash 560516193, now seen corresponding path program 1 times [2024-06-14 13:11:23,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:23,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909212840] [2024-06-14 13:11:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:23,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:25,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:25,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909212840] [2024-06-14 13:11:25,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909212840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:25,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:25,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:11:25,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486072009] [2024-06-14 13:11:25,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:25,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:11:25,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:25,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:11:25,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:11:25,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:25,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 198 transitions, 1941 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) [2024-06-14 13:11:25,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:25,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:25,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:27,118 INFO L124 PetriNetUnfolderBase]: 2157/3620 cut-off events. [2024-06-14 13:11:27,118 INFO L125 PetriNetUnfolderBase]: For 128279/128281 co-relation queries the response was YES. [2024-06-14 13:11:27,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20735 conditions, 3620 events. 2157/3620 cut-off events. For 128279/128281 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21919 event pairs, 514 based on Foata normal form. 1/3618 useless extension candidates. Maximal degree in co-relation 20647. Up to 3378 conditions per place. [2024-06-14 13:11:27,152 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 199 selfloop transitions, 21 changer transitions 0/225 dead transitions. [2024-06-14 13:11:27,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 225 transitions, 2619 flow [2024-06-14 13:11:27,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:11:27,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:11:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 13:11:27,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-14 13:11:27,154 INFO L175 Difference]: Start difference. First operand has 186 places, 198 transitions, 1941 flow. Second operand 7 states and 120 transitions. [2024-06-14 13:11:27,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 225 transitions, 2619 flow [2024-06-14 13:11:27,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 225 transitions, 2529 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:11:27,326 INFO L231 Difference]: Finished difference. Result has 187 places, 204 transitions, 1995 flow [2024-06-14 13:11:27,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1995, PETRI_PLACES=187, PETRI_TRANSITIONS=204} [2024-06-14 13:11:27,326 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-14 13:11:27,326 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 204 transitions, 1995 flow [2024-06-14 13:11:27,327 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) [2024-06-14 13:11:27,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:27,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:27,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:11:27,327 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:27,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:27,327 INFO L85 PathProgramCache]: Analyzing trace with hash -167360693, now seen corresponding path program 1 times [2024-06-14 13:11:27,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:27,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232612389] [2024-06-14 13:11:27,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:27,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:29,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:29,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232612389] [2024-06-14 13:11:29,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232612389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:29,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:29,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:11:29,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698552343] [2024-06-14 13:11:29,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:29,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:11:29,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:29,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:11:29,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:11:29,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:29,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 204 transitions, 1995 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) [2024-06-14 13:11:29,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:29,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:29,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:30,984 INFO L124 PetriNetUnfolderBase]: 2172/3641 cut-off events. [2024-06-14 13:11:30,984 INFO L125 PetriNetUnfolderBase]: For 130337/130339 co-relation queries the response was YES. [2024-06-14 13:11:31,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21068 conditions, 3641 events. 2172/3641 cut-off events. For 130337/130339 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22040 event pairs, 511 based on Foata normal form. 2/3640 useless extension candidates. Maximal degree in co-relation 20980. Up to 3391 conditions per place. [2024-06-14 13:11:31,011 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 205 selfloop transitions, 23 changer transitions 0/233 dead transitions. [2024-06-14 13:11:31,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 233 transitions, 2699 flow [2024-06-14 13:11:31,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:11:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:11:31,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 13:11:31,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-14 13:11:31,013 INFO L175 Difference]: Start difference. First operand has 187 places, 204 transitions, 1995 flow. Second operand 7 states and 120 transitions. [2024-06-14 13:11:31,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 233 transitions, 2699 flow [2024-06-14 13:11:31,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 233 transitions, 2637 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 13:11:31,162 INFO L231 Difference]: Finished difference. Result has 192 places, 213 transitions, 2101 flow [2024-06-14 13:11:31,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1936, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2101, PETRI_PLACES=192, PETRI_TRANSITIONS=213} [2024-06-14 13:11:31,162 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-14 13:11:31,163 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 213 transitions, 2101 flow [2024-06-14 13:11:31,163 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) [2024-06-14 13:11:31,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:31,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:31,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:11:31,163 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:31,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:31,163 INFO L85 PathProgramCache]: Analyzing trace with hash -167360879, now seen corresponding path program 2 times [2024-06-14 13:11:31,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:31,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089936208] [2024-06-14 13:11:31,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:31,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:33,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:33,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089936208] [2024-06-14 13:11:33,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089936208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:33,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:33,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:11:33,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574731870] [2024-06-14 13:11:33,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:33,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:11:33,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:33,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:11:33,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:11:33,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:33,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 213 transitions, 2101 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) [2024-06-14 13:11:33,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:33,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:33,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:34,844 INFO L124 PetriNetUnfolderBase]: 2177/3650 cut-off events. [2024-06-14 13:11:34,845 INFO L125 PetriNetUnfolderBase]: For 135168/135170 co-relation queries the response was YES. [2024-06-14 13:11:34,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21447 conditions, 3650 events. 2177/3650 cut-off events. For 135168/135170 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22080 event pairs, 515 based on Foata normal form. 1/3648 useless extension candidates. Maximal degree in co-relation 21356. Up to 3420 conditions per place. [2024-06-14 13:11:34,877 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 208 selfloop transitions, 19 changer transitions 0/232 dead transitions. [2024-06-14 13:11:34,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 232 transitions, 2643 flow [2024-06-14 13:11:34,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:11:34,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:11:34,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 13:11:34,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787375415282392 [2024-06-14 13:11:34,879 INFO L175 Difference]: Start difference. First operand has 192 places, 213 transitions, 2101 flow. Second operand 7 states and 114 transitions. [2024-06-14 13:11:34,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 232 transitions, 2643 flow [2024-06-14 13:11:35,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 232 transitions, 2593 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-14 13:11:35,044 INFO L231 Difference]: Finished difference. Result has 197 places, 216 transitions, 2145 flow [2024-06-14 13:11:35,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2051, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2145, PETRI_PLACES=197, PETRI_TRANSITIONS=216} [2024-06-14 13:11:35,044 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-14 13:11:35,044 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 216 transitions, 2145 flow [2024-06-14 13:11:35,044 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) [2024-06-14 13:11:35,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:35,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:35,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:11:35,045 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:35,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:35,045 INFO L85 PathProgramCache]: Analyzing trace with hash 116667975, now seen corresponding path program 2 times [2024-06-14 13:11:35,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:35,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667702837] [2024-06-14 13:11:35,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:35,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:37,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:37,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667702837] [2024-06-14 13:11:37,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667702837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:37,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:37,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:11:37,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561791870] [2024-06-14 13:11:37,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:37,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:11:37,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:37,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:11:37,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:11:37,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:37,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 216 transitions, 2145 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) [2024-06-14 13:11:37,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:37,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:37,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:38,716 INFO L124 PetriNetUnfolderBase]: 2187/3665 cut-off events. [2024-06-14 13:11:38,717 INFO L125 PetriNetUnfolderBase]: For 141889/141894 co-relation queries the response was YES. [2024-06-14 13:11:38,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21647 conditions, 3665 events. 2187/3665 cut-off events. For 141889/141894 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22239 event pairs, 516 based on Foata normal form. 4/3665 useless extension candidates. Maximal degree in co-relation 21554. Up to 3408 conditions per place. [2024-06-14 13:11:38,757 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 203 selfloop transitions, 25 changer transitions 0/233 dead transitions. [2024-06-14 13:11:38,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 233 transitions, 2773 flow [2024-06-14 13:11:38,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:11:38,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:11:38,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 13:11:38,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:11:38,763 INFO L175 Difference]: Start difference. First operand has 197 places, 216 transitions, 2145 flow. Second operand 6 states and 102 transitions. [2024-06-14 13:11:38,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 233 transitions, 2773 flow [2024-06-14 13:11:38,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 233 transitions, 2699 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:11:38,951 INFO L231 Difference]: Finished difference. Result has 197 places, 219 transitions, 2167 flow [2024-06-14 13:11:38,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2071, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2167, PETRI_PLACES=197, PETRI_TRANSITIONS=219} [2024-06-14 13:11:38,951 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-14 13:11:38,951 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 219 transitions, 2167 flow [2024-06-14 13:11:38,951 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) [2024-06-14 13:11:38,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:38,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:38,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:11:38,952 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:38,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:38,952 INFO L85 PathProgramCache]: Analyzing trace with hash 116430639, now seen corresponding path program 3 times [2024-06-14 13:11:38,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:38,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410331018] [2024-06-14 13:11:38,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:38,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:41,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:41,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410331018] [2024-06-14 13:11:41,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410331018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:41,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:41,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:11:41,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267286800] [2024-06-14 13:11:41,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:41,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:11:41,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:41,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:11:41,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:11:41,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:41,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 219 transitions, 2167 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) [2024-06-14 13:11:41,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:41,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:41,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:42,508 INFO L124 PetriNetUnfolderBase]: 2184/3660 cut-off events. [2024-06-14 13:11:42,508 INFO L125 PetriNetUnfolderBase]: For 144460/144462 co-relation queries the response was YES. [2024-06-14 13:11:42,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21677 conditions, 3660 events. 2184/3660 cut-off events. For 144460/144462 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22179 event pairs, 515 based on Foata normal form. 1/3658 useless extension candidates. Maximal degree in co-relation 21584. Up to 3416 conditions per place. [2024-06-14 13:11:42,538 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 209 selfloop transitions, 24 changer transitions 0/238 dead transitions. [2024-06-14 13:11:42,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 238 transitions, 2687 flow [2024-06-14 13:11:42,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:11:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:11:42,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:11:42,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 13:11:42,540 INFO L175 Difference]: Start difference. First operand has 197 places, 219 transitions, 2167 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:11:42,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 238 transitions, 2687 flow [2024-06-14 13:11:42,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 238 transitions, 2595 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-14 13:11:42,685 INFO L231 Difference]: Finished difference. Result has 200 places, 219 transitions, 2137 flow [2024-06-14 13:11:42,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2075, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2137, PETRI_PLACES=200, PETRI_TRANSITIONS=219} [2024-06-14 13:11:42,686 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-14 13:11:42,686 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 219 transitions, 2137 flow [2024-06-14 13:11:42,686 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) [2024-06-14 13:11:42,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:42,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:42,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:11:42,687 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:42,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:42,687 INFO L85 PathProgramCache]: Analyzing trace with hash 116430825, now seen corresponding path program 3 times [2024-06-14 13:11:42,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:42,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727712403] [2024-06-14 13:11:42,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:42,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:44,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:44,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727712403] [2024-06-14 13:11:44,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727712403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:44,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:44,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:11:44,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370789980] [2024-06-14 13:11:44,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:44,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:11:44,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:44,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:11:44,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:11:44,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:44,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 219 transitions, 2137 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) [2024-06-14 13:11:44,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:44,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:44,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:46,202 INFO L124 PetriNetUnfolderBase]: 2178/3652 cut-off events. [2024-06-14 13:11:46,202 INFO L125 PetriNetUnfolderBase]: For 148264/148266 co-relation queries the response was YES. [2024-06-14 13:11:46,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21576 conditions, 3652 events. 2178/3652 cut-off events. For 148264/148266 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22131 event pairs, 510 based on Foata normal form. 2/3651 useless extension candidates. Maximal degree in co-relation 21482. Up to 3399 conditions per place. [2024-06-14 13:11:46,237 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 206 selfloop transitions, 26 changer transitions 0/237 dead transitions. [2024-06-14 13:11:46,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 237 transitions, 2649 flow [2024-06-14 13:11:46,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:11:46,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:11:46,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:11:46,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 13:11:46,239 INFO L175 Difference]: Start difference. First operand has 200 places, 219 transitions, 2137 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:11:46,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 237 transitions, 2649 flow [2024-06-14 13:11:46,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 237 transitions, 2577 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:11:46,437 INFO L231 Difference]: Finished difference. Result has 201 places, 219 transitions, 2127 flow [2024-06-14 13:11:46,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2127, PETRI_PLACES=201, PETRI_TRANSITIONS=219} [2024-06-14 13:11:46,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-14 13:11:46,438 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 219 transitions, 2127 flow [2024-06-14 13:11:46,438 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) [2024-06-14 13:11:46,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:46,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:46,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:11:46,438 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)] === [2024-06-14 13:11:46,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:46,438 INFO L85 PathProgramCache]: Analyzing trace with hash 116676903, now seen corresponding path program 1 times [2024-06-14 13:11:46,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:46,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86663506] [2024-06-14 13:11:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:46,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:49,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:49,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86663506] [2024-06-14 13:11:49,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86663506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:49,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:49,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:49,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054760672] [2024-06-14 13:11:49,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:49,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:49,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:49,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:49,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:49,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:11:49,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 219 transitions, 2127 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) [2024-06-14 13:11:49,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:49,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:11:49,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:50,603 INFO L124 PetriNetUnfolderBase]: 2018/3445 cut-off events. [2024-06-14 13:11:50,603 INFO L125 PetriNetUnfolderBase]: For 144642/144653 co-relation queries the response was YES. [2024-06-14 13:11:50,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20557 conditions, 3445 events. 2018/3445 cut-off events. For 144642/144653 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 21252 event pairs, 477 based on Foata normal form. 11/3427 useless extension candidates. Maximal degree in co-relation 20462. Up to 3128 conditions per place. [2024-06-14 13:11:50,635 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 201 selfloop transitions, 12 changer transitions 0/234 dead transitions. [2024-06-14 13:11:50,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 234 transitions, 2617 flow [2024-06-14 13:11:50,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:11:50,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:11:50,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 13:11:50,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992248062015504 [2024-06-14 13:11:50,637 INFO L175 Difference]: Start difference. First operand has 201 places, 219 transitions, 2127 flow. Second operand 6 states and 103 transitions. [2024-06-14 13:11:50,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 234 transitions, 2617 flow [2024-06-14 13:11:50,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 234 transitions, 2555 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 13:11:50,881 INFO L231 Difference]: Finished difference. Result has 201 places, 221 transitions, 2128 flow [2024-06-14 13:11:50,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2128, PETRI_PLACES=201, PETRI_TRANSITIONS=221} [2024-06-14 13:11:50,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-14 13:11:50,882 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 221 transitions, 2128 flow [2024-06-14 13:11:50,882 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) [2024-06-14 13:11:50,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:50,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:50,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:11:50,883 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)] === [2024-06-14 13:11:50,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:50,883 INFO L85 PathProgramCache]: Analyzing trace with hash 196134332, now seen corresponding path program 1 times [2024-06-14 13:11:50,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:50,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223750004] [2024-06-14 13:11:50,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:50,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:53,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:53,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223750004] [2024-06-14 13:11:53,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223750004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:53,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:53,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:53,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370078251] [2024-06-14 13:11:53,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:53,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:53,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:53,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:53,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:53,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:53,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 221 transitions, 2128 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) [2024-06-14 13:11:53,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:53,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:53,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:55,336 INFO L124 PetriNetUnfolderBase]: 2183/3659 cut-off events. [2024-06-14 13:11:55,336 INFO L125 PetriNetUnfolderBase]: For 145827/145829 co-relation queries the response was YES. [2024-06-14 13:11:55,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21553 conditions, 3659 events. 2183/3659 cut-off events. For 145827/145829 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22086 event pairs, 508 based on Foata normal form. 2/3658 useless extension candidates. Maximal degree in co-relation 21458. Up to 3357 conditions per place. [2024-06-14 13:11:55,367 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 208 selfloop transitions, 40 changer transitions 0/253 dead transitions. [2024-06-14 13:11:55,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 253 transitions, 2872 flow [2024-06-14 13:11:55,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:55,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:11:55,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-14 13:11:55,368 INFO L175 Difference]: Start difference. First operand has 201 places, 221 transitions, 2128 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:11:55,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 253 transitions, 2872 flow [2024-06-14 13:11:55,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 253 transitions, 2825 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 13:11:55,565 INFO L231 Difference]: Finished difference. Result has 205 places, 227 transitions, 2253 flow [2024-06-14 13:11:55,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2081, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2253, PETRI_PLACES=205, PETRI_TRANSITIONS=227} [2024-06-14 13:11:55,566 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-14 13:11:55,566 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 227 transitions, 2253 flow [2024-06-14 13:11:55,566 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) [2024-06-14 13:11:55,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:55,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:55,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:11:55,567 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)] === [2024-06-14 13:11:55,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:55,567 INFO L85 PathProgramCache]: Analyzing trace with hash 199853402, now seen corresponding path program 2 times [2024-06-14 13:11:55,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:55,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831786190] [2024-06-14 13:11:55,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:55,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:58,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:58,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831786190] [2024-06-14 13:11:58,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831786190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:58,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:58,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:58,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15290444] [2024-06-14 13:11:58,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:58,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:58,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:58,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:58,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:58,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:58,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 227 transitions, 2253 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) [2024-06-14 13:11:58,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:58,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:58,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:59,557 INFO L124 PetriNetUnfolderBase]: 2209/3703 cut-off events. [2024-06-14 13:11:59,557 INFO L125 PetriNetUnfolderBase]: For 155376/155378 co-relation queries the response was YES. [2024-06-14 13:11:59,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22356 conditions, 3703 events. 2209/3703 cut-off events. For 155376/155378 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22422 event pairs, 507 based on Foata normal form. 2/3702 useless extension candidates. Maximal degree in co-relation 22260. Up to 3422 conditions per place. [2024-06-14 13:11:59,586 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 217 selfloop transitions, 34 changer transitions 0/256 dead transitions. [2024-06-14 13:11:59,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 256 transitions, 3007 flow [2024-06-14 13:11:59,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:59,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:11:59,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:11:59,588 INFO L175 Difference]: Start difference. First operand has 205 places, 227 transitions, 2253 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:11:59,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 256 transitions, 3007 flow [2024-06-14 13:11:59,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 256 transitions, 2923 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 13:11:59,793 INFO L231 Difference]: Finished difference. Result has 209 places, 233 transitions, 2341 flow [2024-06-14 13:11:59,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2181, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2341, PETRI_PLACES=209, PETRI_TRANSITIONS=233} [2024-06-14 13:11:59,793 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-14 13:11:59,793 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 233 transitions, 2341 flow [2024-06-14 13:11:59,793 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) [2024-06-14 13:11:59,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:59,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:59,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:11:59,794 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)] === [2024-06-14 13:11:59,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:59,794 INFO L85 PathProgramCache]: Analyzing trace with hash -893212840, now seen corresponding path program 3 times [2024-06-14 13:11:59,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:59,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025620331] [2024-06-14 13:11:59,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:59,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:02,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:02,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025620331] [2024-06-14 13:12:02,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025620331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:02,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:02,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:02,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724386875] [2024-06-14 13:12:02,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:02,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:02,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:02,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:02,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:02,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:02,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 233 transitions, 2341 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) [2024-06-14 13:12:02,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:02,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:02,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:03,919 INFO L124 PetriNetUnfolderBase]: 2203/3695 cut-off events. [2024-06-14 13:12:03,919 INFO L125 PetriNetUnfolderBase]: For 158029/158031 co-relation queries the response was YES. [2024-06-14 13:12:03,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22340 conditions, 3695 events. 2203/3695 cut-off events. For 158029/158031 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22387 event pairs, 507 based on Foata normal form. 2/3694 useless extension candidates. Maximal degree in co-relation 22242. Up to 3417 conditions per place. [2024-06-14 13:12:03,954 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 217 selfloop transitions, 35 changer transitions 0/257 dead transitions. [2024-06-14 13:12:03,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 257 transitions, 2905 flow [2024-06-14 13:12:03,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:12:03,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:12:03,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-14 13:12:03,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36511627906976746 [2024-06-14 13:12:03,955 INFO L175 Difference]: Start difference. First operand has 209 places, 233 transitions, 2341 flow. Second operand 10 states and 157 transitions. [2024-06-14 13:12:03,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 257 transitions, 2905 flow [2024-06-14 13:12:04,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 257 transitions, 2823 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 13:12:04,176 INFO L231 Difference]: Finished difference. Result has 215 places, 233 transitions, 2335 flow [2024-06-14 13:12:04,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2259, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2335, PETRI_PLACES=215, PETRI_TRANSITIONS=233} [2024-06-14 13:12:04,177 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-14 13:12:04,177 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 233 transitions, 2335 flow [2024-06-14 13:12:04,178 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) [2024-06-14 13:12:04,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:04,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:04,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:12:04,178 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:04,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:04,179 INFO L85 PathProgramCache]: Analyzing trace with hash -678258724, now seen corresponding path program 4 times [2024-06-14 13:12:04,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:04,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525402267] [2024-06-14 13:12:04,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:04,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:06,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:06,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525402267] [2024-06-14 13:12:06,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525402267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:06,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:06,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:06,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223946875] [2024-06-14 13:12:06,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:06,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:06,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:06,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:06,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:06,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:06,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 233 transitions, 2335 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) [2024-06-14 13:12:06,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:06,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:06,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:08,275 INFO L124 PetriNetUnfolderBase]: 2213/3712 cut-off events. [2024-06-14 13:12:08,275 INFO L125 PetriNetUnfolderBase]: For 163706/163711 co-relation queries the response was YES. [2024-06-14 13:12:08,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22559 conditions, 3712 events. 2213/3712 cut-off events. For 163706/163711 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22508 event pairs, 512 based on Foata normal form. 4/3712 useless extension candidates. Maximal degree in co-relation 22459. Up to 3396 conditions per place. [2024-06-14 13:12:08,309 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 208 selfloop transitions, 46 changer transitions 0/259 dead transitions. [2024-06-14 13:12:08,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 259 transitions, 3053 flow [2024-06-14 13:12:08,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:08,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:08,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 13:12:08,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37467700258397935 [2024-06-14 13:12:08,311 INFO L175 Difference]: Start difference. First operand has 215 places, 233 transitions, 2335 flow. Second operand 9 states and 145 transitions. [2024-06-14 13:12:08,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 259 transitions, 3053 flow [2024-06-14 13:12:08,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 259 transitions, 2975 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 13:12:08,583 INFO L231 Difference]: Finished difference. Result has 215 places, 236 transitions, 2401 flow [2024-06-14 13:12:08,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2257, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2401, PETRI_PLACES=215, PETRI_TRANSITIONS=236} [2024-06-14 13:12:08,583 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-14 13:12:08,583 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 236 transitions, 2401 flow [2024-06-14 13:12:08,583 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) [2024-06-14 13:12:08,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:08,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:08,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:12:08,584 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)] === [2024-06-14 13:12:08,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:08,584 INFO L85 PathProgramCache]: Analyzing trace with hash -685615954, now seen corresponding path program 5 times [2024-06-14 13:12:08,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:08,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685013961] [2024-06-14 13:12:08,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:08,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:11,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:11,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685013961] [2024-06-14 13:12:11,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685013961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:11,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:11,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:11,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490967360] [2024-06-14 13:12:11,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:11,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:11,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:11,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:11,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:11,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:11,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 236 transitions, 2401 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) [2024-06-14 13:12:11,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:11,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:11,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:12,628 INFO L124 PetriNetUnfolderBase]: 2223/3727 cut-off events. [2024-06-14 13:12:12,629 INFO L125 PetriNetUnfolderBase]: For 169374/169376 co-relation queries the response was YES. [2024-06-14 13:12:12,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22814 conditions, 3727 events. 2223/3727 cut-off events. For 169374/169376 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22589 event pairs, 507 based on Foata normal form. 2/3726 useless extension candidates. Maximal degree in co-relation 22713. Up to 3406 conditions per place. [2024-06-14 13:12:12,658 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 211 selfloop transitions, 48 changer transitions 0/264 dead transitions. [2024-06-14 13:12:12,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 264 transitions, 3145 flow [2024-06-14 13:12:12,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:12:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:12:12,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 13:12:12,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-14 13:12:12,659 INFO L175 Difference]: Start difference. First operand has 215 places, 236 transitions, 2401 flow. Second operand 7 states and 127 transitions. [2024-06-14 13:12:12,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 264 transitions, 3145 flow [2024-06-14 13:12:12,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 264 transitions, 2989 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 13:12:12,924 INFO L231 Difference]: Finished difference. Result has 215 places, 239 transitions, 2403 flow [2024-06-14 13:12:12,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2259, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2403, PETRI_PLACES=215, PETRI_TRANSITIONS=239} [2024-06-14 13:12:12,925 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-14 13:12:12,925 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 239 transitions, 2403 flow [2024-06-14 13:12:12,925 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) [2024-06-14 13:12:12,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:12,925 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] [2024-06-14 13:12:12,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:12:12,925 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)] === [2024-06-14 13:12:12,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:12,925 INFO L85 PathProgramCache]: Analyzing trace with hash -685610374, now seen corresponding path program 6 times [2024-06-14 13:12:12,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:12,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455709716] [2024-06-14 13:12:12,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:12,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:15,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:15,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:15,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455709716] [2024-06-14 13:12:15,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455709716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:15,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:15,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:15,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062755900] [2024-06-14 13:12:15,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:15,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:15,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:15,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:15,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:15,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 239 transitions, 2403 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) [2024-06-14 13:12:15,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:15,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:15,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:17,137 INFO L124 PetriNetUnfolderBase]: 2217/3719 cut-off events. [2024-06-14 13:12:17,137 INFO L125 PetriNetUnfolderBase]: For 171430/171432 co-relation queries the response was YES. [2024-06-14 13:12:17,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22674 conditions, 3719 events. 2217/3719 cut-off events. For 171430/171432 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22554 event pairs, 507 based on Foata normal form. 2/3718 useless extension candidates. Maximal degree in co-relation 22572. Up to 3401 conditions per place. [2024-06-14 13:12:17,190 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 212 selfloop transitions, 50 changer transitions 0/267 dead transitions. [2024-06-14 13:12:17,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 267 transitions, 2999 flow [2024-06-14 13:12:17,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:17,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:17,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 13:12:17,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 13:12:17,192 INFO L175 Difference]: Start difference. First operand has 215 places, 239 transitions, 2403 flow. Second operand 9 states and 152 transitions. [2024-06-14 13:12:17,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 267 transitions, 2999 flow [2024-06-14 13:12:17,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 267 transitions, 2889 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:12:17,509 INFO L231 Difference]: Finished difference. Result has 219 places, 239 transitions, 2403 flow [2024-06-14 13:12:17,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2293, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2403, PETRI_PLACES=219, PETRI_TRANSITIONS=239} [2024-06-14 13:12:17,510 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-14 13:12:17,510 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 239 transitions, 2403 flow [2024-06-14 13:12:17,510 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) [2024-06-14 13:12:17,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:17,510 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] [2024-06-14 13:12:17,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:12:17,511 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)] === [2024-06-14 13:12:17,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:17,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1196505274, now seen corresponding path program 1 times [2024-06-14 13:12:17,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:17,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295524754] [2024-06-14 13:12:17,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:17,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:20,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:20,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295524754] [2024-06-14 13:12:20,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295524754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:20,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:20,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:20,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546302244] [2024-06-14 13:12:20,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:20,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:20,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:20,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:20,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:20,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:20,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 239 transitions, 2403 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) [2024-06-14 13:12:20,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:20,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:20,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:22,639 INFO L124 PetriNetUnfolderBase]: 2230/3741 cut-off events. [2024-06-14 13:12:22,639 INFO L125 PetriNetUnfolderBase]: For 171802/171808 co-relation queries the response was YES. [2024-06-14 13:12:22,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22852 conditions, 3741 events. 2230/3741 cut-off events. For 171802/171808 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 22741 event pairs, 519 based on Foata normal form. 7/3742 useless extension candidates. Maximal degree in co-relation 22750. Up to 3345 conditions per place. [2024-06-14 13:12:22,675 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 218 selfloop transitions, 57 changer transitions 0/280 dead transitions. [2024-06-14 13:12:22,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 280 transitions, 3423 flow [2024-06-14 13:12:22,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:22,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:22,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:12:22,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 13:12:22,677 INFO L175 Difference]: Start difference. First operand has 219 places, 239 transitions, 2403 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:12:22,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 280 transitions, 3423 flow [2024-06-14 13:12:22,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 280 transitions, 3281 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 13:12:22,979 INFO L231 Difference]: Finished difference. Result has 217 places, 248 transitions, 2547 flow [2024-06-14 13:12:22,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2265, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2547, PETRI_PLACES=217, PETRI_TRANSITIONS=248} [2024-06-14 13:12:22,980 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-14 13:12:22,980 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 248 transitions, 2547 flow [2024-06-14 13:12:22,980 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) [2024-06-14 13:12:22,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:22,981 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, 1] [2024-06-14 13:12:22,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:12:22,981 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)] === [2024-06-14 13:12:22,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:22,981 INFO L85 PathProgramCache]: Analyzing trace with hash -699178638, now seen corresponding path program 2 times [2024-06-14 13:12:22,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:22,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762047018] [2024-06-14 13:12:22,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:22,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:26,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:26,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762047018] [2024-06-14 13:12:26,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762047018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:26,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:26,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:26,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313846538] [2024-06-14 13:12:26,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:26,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:26,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:26,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:26,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:26,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:26,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 248 transitions, 2547 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) [2024-06-14 13:12:26,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:26,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:26,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:28,213 INFO L124 PetriNetUnfolderBase]: 2240/3758 cut-off events. [2024-06-14 13:12:28,213 INFO L125 PetriNetUnfolderBase]: For 173660/173669 co-relation queries the response was YES. [2024-06-14 13:12:28,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23263 conditions, 3758 events. 2240/3758 cut-off events. For 173660/173669 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22894 event pairs, 511 based on Foata normal form. 9/3763 useless extension candidates. Maximal degree in co-relation 23161. Up to 3429 conditions per place. [2024-06-14 13:12:28,252 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 233 selfloop transitions, 42 changer transitions 0/280 dead transitions. [2024-06-14 13:12:28,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 280 transitions, 3262 flow [2024-06-14 13:12:28,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:28,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:12:28,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 13:12:28,254 INFO L175 Difference]: Start difference. First operand has 217 places, 248 transitions, 2547 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:12:28,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 280 transitions, 3262 flow [2024-06-14 13:12:28,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 280 transitions, 3147 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-14 13:12:28,542 INFO L231 Difference]: Finished difference. Result has 222 places, 254 transitions, 2615 flow [2024-06-14 13:12:28,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2449, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2615, PETRI_PLACES=222, PETRI_TRANSITIONS=254} [2024-06-14 13:12:28,543 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-14 13:12:28,543 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 254 transitions, 2615 flow [2024-06-14 13:12:28,543 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) [2024-06-14 13:12:28,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:28,543 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] [2024-06-14 13:12:28,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:12:28,544 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)] === [2024-06-14 13:12:28,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:28,544 INFO L85 PathProgramCache]: Analyzing trace with hash 209876214, now seen corresponding path program 1 times [2024-06-14 13:12:28,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:28,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473681654] [2024-06-14 13:12:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:28,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:31,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:31,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473681654] [2024-06-14 13:12:31,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473681654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:31,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:31,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:31,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104255532] [2024-06-14 13:12:31,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:31,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:31,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:31,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:31,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:31,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:31,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 254 transitions, 2615 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) [2024-06-14 13:12:31,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:31,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:31,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:33,401 INFO L124 PetriNetUnfolderBase]: 2282/3816 cut-off events. [2024-06-14 13:12:33,401 INFO L125 PetriNetUnfolderBase]: For 187942/187951 co-relation queries the response was YES. [2024-06-14 13:12:33,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24031 conditions, 3816 events. 2282/3816 cut-off events. For 187942/187951 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23147 event pairs, 513 based on Foata normal form. 10/3822 useless extension candidates. Maximal degree in co-relation 23927. Up to 3444 conditions per place. [2024-06-14 13:12:33,440 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 243 selfloop transitions, 52 changer transitions 0/300 dead transitions. [2024-06-14 13:12:33,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 300 transitions, 3679 flow [2024-06-14 13:12:33,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:12:33,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:12:33,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-14 13:12:33,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3883720930232558 [2024-06-14 13:12:33,442 INFO L175 Difference]: Start difference. First operand has 222 places, 254 transitions, 2615 flow. Second operand 10 states and 167 transitions. [2024-06-14 13:12:33,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 300 transitions, 3679 flow [2024-06-14 13:12:33,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 300 transitions, 3565 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 13:12:33,833 INFO L231 Difference]: Finished difference. Result has 228 places, 267 transitions, 2794 flow [2024-06-14 13:12:33,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2501, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2794, PETRI_PLACES=228, PETRI_TRANSITIONS=267} [2024-06-14 13:12:33,833 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-14 13:12:33,833 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 267 transitions, 2794 flow [2024-06-14 13:12:33,834 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) [2024-06-14 13:12:33,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:33,834 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] [2024-06-14 13:12:33,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:12:33,834 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)] === [2024-06-14 13:12:33,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:33,835 INFO L85 PathProgramCache]: Analyzing trace with hash -521809782, now seen corresponding path program 2 times [2024-06-14 13:12:33,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:33,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685698415] [2024-06-14 13:12:33,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:33,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:36,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:36,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685698415] [2024-06-14 13:12:36,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685698415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:36,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:37,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:37,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228210685] [2024-06-14 13:12:37,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:37,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:37,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:37,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:37,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:37,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:37,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 267 transitions, 2794 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) [2024-06-14 13:12:37,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:37,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:37,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:38,551 INFO L124 PetriNetUnfolderBase]: 2334/3890 cut-off events. [2024-06-14 13:12:38,551 INFO L125 PetriNetUnfolderBase]: For 202279/202288 co-relation queries the response was YES. [2024-06-14 13:12:38,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25172 conditions, 3890 events. 2334/3890 cut-off events. For 202279/202288 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23585 event pairs, 517 based on Foata normal form. 10/3896 useless extension candidates. Maximal degree in co-relation 25066. Up to 3492 conditions per place. [2024-06-14 13:12:38,589 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 242 selfloop transitions, 64 changer transitions 0/311 dead transitions. [2024-06-14 13:12:38,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 311 transitions, 3950 flow [2024-06-14 13:12:38,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:38,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 13:12:38,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 13:12:38,590 INFO L175 Difference]: Start difference. First operand has 228 places, 267 transitions, 2794 flow. Second operand 9 states and 152 transitions. [2024-06-14 13:12:38,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 311 transitions, 3950 flow [2024-06-14 13:12:38,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 311 transitions, 3756 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-14 13:12:38,945 INFO L231 Difference]: Finished difference. Result has 232 places, 283 transitions, 2972 flow [2024-06-14 13:12:38,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2665, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2972, PETRI_PLACES=232, PETRI_TRANSITIONS=283} [2024-06-14 13:12:38,946 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-14 13:12:38,946 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 283 transitions, 2972 flow [2024-06-14 13:12:38,946 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) [2024-06-14 13:12:38,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:38,946 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] [2024-06-14 13:12:38,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:12:38,947 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:38,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:38,947 INFO L85 PathProgramCache]: Analyzing trace with hash -522047118, now seen corresponding path program 3 times [2024-06-14 13:12:38,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:38,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465856400] [2024-06-14 13:12:38,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:38,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:42,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:42,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465856400] [2024-06-14 13:12:42,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465856400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:42,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:42,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:42,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864405511] [2024-06-14 13:12:42,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:42,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:42,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:42,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:42,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:42,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:42,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 283 transitions, 2972 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) [2024-06-14 13:12:42,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:42,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:42,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:44,478 INFO L124 PetriNetUnfolderBase]: 2347/3910 cut-off events. [2024-06-14 13:12:44,478 INFO L125 PetriNetUnfolderBase]: For 207975/207984 co-relation queries the response was YES. [2024-06-14 13:12:44,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25362 conditions, 3910 events. 2347/3910 cut-off events. For 207975/207984 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 23740 event pairs, 517 based on Foata normal form. 9/3915 useless extension candidates. Maximal degree in co-relation 25254. Up to 3568 conditions per place. [2024-06-14 13:12:44,522 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 254 selfloop transitions, 54 changer transitions 0/313 dead transitions. [2024-06-14 13:12:44,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 313 transitions, 3876 flow [2024-06-14 13:12:44,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:44,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:44,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:12:44,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-14 13:12:44,524 INFO L175 Difference]: Start difference. First operand has 232 places, 283 transitions, 2972 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:12:44,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 313 transitions, 3876 flow [2024-06-14 13:12:44,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 313 transitions, 3790 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 13:12:44,886 INFO L231 Difference]: Finished difference. Result has 239 places, 289 transitions, 3122 flow [2024-06-14 13:12:44,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3122, PETRI_PLACES=239, PETRI_TRANSITIONS=289} [2024-06-14 13:12:44,887 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-14 13:12:44,887 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 289 transitions, 3122 flow [2024-06-14 13:12:44,887 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) [2024-06-14 13:12:44,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:44,888 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] [2024-06-14 13:12:44,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:12:44,888 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:44,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:44,888 INFO L85 PathProgramCache]: Analyzing trace with hash -522046932, now seen corresponding path program 3 times [2024-06-14 13:12:44,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:44,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034957569] [2024-06-14 13:12:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:44,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:48,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:48,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034957569] [2024-06-14 13:12:48,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034957569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:48,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:48,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:48,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621696632] [2024-06-14 13:12:48,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:48,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:48,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:48,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:48,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:48,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:48,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 289 transitions, 3122 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) [2024-06-14 13:12:48,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:48,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:48,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:49,808 INFO L124 PetriNetUnfolderBase]: 2341/3902 cut-off events. [2024-06-14 13:12:49,808 INFO L125 PetriNetUnfolderBase]: For 212945/212954 co-relation queries the response was YES. [2024-06-14 13:12:49,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25295 conditions, 3902 events. 2341/3902 cut-off events. For 212945/212954 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 23697 event pairs, 514 based on Foata normal form. 10/3908 useless extension candidates. Maximal degree in co-relation 25185. Up to 3505 conditions per place. [2024-06-14 13:12:49,847 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 249 selfloop transitions, 66 changer transitions 0/320 dead transitions. [2024-06-14 13:12:49,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 320 transitions, 4072 flow [2024-06-14 13:12:49,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:12:49,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:12:49,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-14 13:12:49,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37420718816067655 [2024-06-14 13:12:49,849 INFO L175 Difference]: Start difference. First operand has 239 places, 289 transitions, 3122 flow. Second operand 11 states and 177 transitions. [2024-06-14 13:12:49,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 320 transitions, 4072 flow [2024-06-14 13:12:50,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 320 transitions, 3918 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 13:12:50,193 INFO L231 Difference]: Finished difference. Result has 245 places, 289 transitions, 3106 flow [2024-06-14 13:12:50,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2968, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3106, PETRI_PLACES=245, PETRI_TRANSITIONS=289} [2024-06-14 13:12:50,194 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-14 13:12:50,194 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 289 transitions, 3106 flow [2024-06-14 13:12:50,194 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) [2024-06-14 13:12:50,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:50,194 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] [2024-06-14 13:12:50,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:12:50,194 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:50,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:50,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1019007520, now seen corresponding path program 1 times [2024-06-14 13:12:50,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:50,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450754695] [2024-06-14 13:12:50,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:50,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:53,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:53,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450754695] [2024-06-14 13:12:53,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450754695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:53,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:53,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:53,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524367911] [2024-06-14 13:12:53,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:53,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:53,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:53,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:53,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:54,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:12:54,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 289 transitions, 3106 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:54,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:54,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:12:54,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:55,425 INFO L124 PetriNetUnfolderBase]: 2232/3768 cut-off events. [2024-06-14 13:12:55,426 INFO L125 PetriNetUnfolderBase]: For 237003/237014 co-relation queries the response was YES. [2024-06-14 13:12:55,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24850 conditions, 3768 events. 2232/3768 cut-off events. For 237003/237014 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 23306 event pairs, 484 based on Foata normal form. 21/3758 useless extension candidates. Maximal degree in co-relation 24739. Up to 3259 conditions per place. [2024-06-14 13:12:55,469 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 235 selfloop transitions, 46 changer transitions 0/318 dead transitions. [2024-06-14 13:12:55,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 318 transitions, 3780 flow [2024-06-14 13:12:55,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:55,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:55,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:12:55,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-14 13:12:55,470 INFO L175 Difference]: Start difference. First operand has 245 places, 289 transitions, 3106 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:12:55,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 318 transitions, 3780 flow [2024-06-14 13:12:55,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 318 transitions, 3628 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 13:12:55,931 INFO L231 Difference]: Finished difference. Result has 245 places, 290 transitions, 3070 flow [2024-06-14 13:12:55,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2954, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3070, PETRI_PLACES=245, PETRI_TRANSITIONS=290} [2024-06-14 13:12:55,931 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-14 13:12:55,932 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 290 transitions, 3070 flow [2024-06-14 13:12:55,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:55,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:55,932 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] [2024-06-14 13:12:55,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:12:55,932 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:55,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:55,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1545855682, now seen corresponding path program 4 times [2024-06-14 13:12:55,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:55,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429326624] [2024-06-14 13:12:55,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:55,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:59,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:59,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429326624] [2024-06-14 13:12:59,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429326624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:59,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:59,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:59,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076782893] [2024-06-14 13:12:59,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:59,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:59,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:59,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:59,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:59,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:59,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 290 transitions, 3070 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) [2024-06-14 13:12:59,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:59,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:59,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:01,009 INFO L124 PetriNetUnfolderBase]: 2398/3995 cut-off events. [2024-06-14 13:13:01,009 INFO L125 PetriNetUnfolderBase]: For 227891/227912 co-relation queries the response was YES. [2024-06-14 13:13:01,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26139 conditions, 3995 events. 2398/3995 cut-off events. For 227891/227912 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24324 event pairs, 537 based on Foata normal form. 15/4003 useless extension candidates. Maximal degree in co-relation 26027. Up to 3569 conditions per place. [2024-06-14 13:13:01,053 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 241 selfloop transitions, 80 changer transitions 0/326 dead transitions. [2024-06-14 13:13:01,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 326 transitions, 4282 flow [2024-06-14 13:13:01,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:01,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:01,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:13:01,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 13:13:01,055 INFO L175 Difference]: Start difference. First operand has 245 places, 290 transitions, 3070 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:13:01,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 326 transitions, 4282 flow [2024-06-14 13:13:01,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 326 transitions, 4188 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 13:13:01,438 INFO L231 Difference]: Finished difference. Result has 246 places, 296 transitions, 3258 flow [2024-06-14 13:13:01,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2976, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3258, PETRI_PLACES=246, PETRI_TRANSITIONS=296} [2024-06-14 13:13:01,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-14 13:13:01,438 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 296 transitions, 3258 flow [2024-06-14 13:13:01,439 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) [2024-06-14 13:13:01,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:01,439 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] [2024-06-14 13:13:01,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:13:01,439 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:01,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:01,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1773756832, now seen corresponding path program 5 times [2024-06-14 13:13:01,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:01,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274724439] [2024-06-14 13:13:01,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:01,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:04,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:04,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274724439] [2024-06-14 13:13:04,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274724439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:04,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:04,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:04,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114504724] [2024-06-14 13:13:04,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:04,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:04,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:04,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:04,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:04,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:04,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 296 transitions, 3258 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) [2024-06-14 13:13:04,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:04,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:04,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:06,445 INFO L124 PetriNetUnfolderBase]: 2403/4002 cut-off events. [2024-06-14 13:13:06,445 INFO L125 PetriNetUnfolderBase]: For 234557/234578 co-relation queries the response was YES. [2024-06-14 13:13:06,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26327 conditions, 4002 events. 2403/4002 cut-off events. For 234557/234578 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24370 event pairs, 535 based on Foata normal form. 15/4010 useless extension candidates. Maximal degree in co-relation 26214. Up to 3575 conditions per place. [2024-06-14 13:13:06,492 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 236 selfloop transitions, 87 changer transitions 0/328 dead transitions. [2024-06-14 13:13:06,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 328 transitions, 4302 flow [2024-06-14 13:13:06,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:06,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:13:06,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 13:13:06,493 INFO L175 Difference]: Start difference. First operand has 246 places, 296 transitions, 3258 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:13:06,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 328 transitions, 4302 flow [2024-06-14 13:13:06,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 328 transitions, 4059 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 13:13:06,826 INFO L231 Difference]: Finished difference. Result has 249 places, 299 transitions, 3259 flow [2024-06-14 13:13:06,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3029, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3259, PETRI_PLACES=249, PETRI_TRANSITIONS=299} [2024-06-14 13:13:06,826 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-14 13:13:06,826 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 299 transitions, 3259 flow [2024-06-14 13:13:06,826 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) [2024-06-14 13:13:06,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:06,826 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] [2024-06-14 13:13:06,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:13:06,827 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)] === [2024-06-14 13:13:06,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:06,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2035270738, now seen corresponding path program 6 times [2024-06-14 13:13:06,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:06,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408290187] [2024-06-14 13:13:06,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:06,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:09,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:09,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408290187] [2024-06-14 13:13:09,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408290187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:09,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:09,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:09,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265147443] [2024-06-14 13:13:09,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:09,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:09,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:09,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:09,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:09,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:09,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 299 transitions, 3259 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) [2024-06-14 13:13:09,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:09,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:09,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:11,426 INFO L124 PetriNetUnfolderBase]: 2408/4009 cut-off events. [2024-06-14 13:13:11,426 INFO L125 PetriNetUnfolderBase]: For 240668/240689 co-relation queries the response was YES. [2024-06-14 13:13:11,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26443 conditions, 4009 events. 2408/4009 cut-off events. For 240668/240689 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24404 event pairs, 537 based on Foata normal form. 15/4017 useless extension candidates. Maximal degree in co-relation 26329. Up to 3581 conditions per place. [2024-06-14 13:13:11,471 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 231 selfloop transitions, 90 changer transitions 0/326 dead transitions. [2024-06-14 13:13:11,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 326 transitions, 4155 flow [2024-06-14 13:13:11,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:11,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:13:11,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:13:11,472 INFO L175 Difference]: Start difference. First operand has 249 places, 299 transitions, 3259 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:13:11,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 326 transitions, 4155 flow [2024-06-14 13:13:11,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 326 transitions, 3916 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 13:13:11,953 INFO L231 Difference]: Finished difference. Result has 251 places, 302 transitions, 3262 flow [2024-06-14 13:13:11,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3032, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3262, PETRI_PLACES=251, PETRI_TRANSITIONS=302} [2024-06-14 13:13:11,953 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-14 13:13:11,953 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 302 transitions, 3262 flow [2024-06-14 13:13:11,953 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) [2024-06-14 13:13:11,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:11,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:11,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:13:11,954 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)] === [2024-06-14 13:13:11,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:11,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1545975652, now seen corresponding path program 7 times [2024-06-14 13:13:11,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:11,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084198655] [2024-06-14 13:13:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:11,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:15,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:15,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084198655] [2024-06-14 13:13:15,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084198655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:15,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:15,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:15,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455190580] [2024-06-14 13:13:15,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:15,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:15,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:15,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:15,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:15,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 302 transitions, 3262 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) [2024-06-14 13:13:15,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:15,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:15,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:17,153 INFO L124 PetriNetUnfolderBase]: 2405/4001 cut-off events. [2024-06-14 13:13:17,154 INFO L125 PetriNetUnfolderBase]: For 245409/245430 co-relation queries the response was YES. [2024-06-14 13:13:17,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26398 conditions, 4001 events. 2405/4001 cut-off events. For 245409/245430 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 24275 event pairs, 529 based on Foata normal form. 15/4009 useless extension candidates. Maximal degree in co-relation 26283. Up to 3663 conditions per place. [2024-06-14 13:13:17,197 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 271 selfloop transitions, 49 changer transitions 0/325 dead transitions. [2024-06-14 13:13:17,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 325 transitions, 3972 flow [2024-06-14 13:13:17,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:17,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:13:17,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 13:13:17,198 INFO L175 Difference]: Start difference. First operand has 251 places, 302 transitions, 3262 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:13:17,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 325 transitions, 3972 flow [2024-06-14 13:13:17,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 325 transitions, 3781 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 13:13:17,639 INFO L231 Difference]: Finished difference. Result has 254 places, 302 transitions, 3175 flow [2024-06-14 13:13:17,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3071, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3175, PETRI_PLACES=254, PETRI_TRANSITIONS=302} [2024-06-14 13:13:17,639 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-14 13:13:17,639 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 302 transitions, 3175 flow [2024-06-14 13:13:17,639 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) [2024-06-14 13:13:17,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:17,640 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] [2024-06-14 13:13:17,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:13:17,640 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)] === [2024-06-14 13:13:17,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:17,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1545975838, now seen corresponding path program 4 times [2024-06-14 13:13:17,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:17,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149487594] [2024-06-14 13:13:17,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:17,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:20,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:20,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:20,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149487594] [2024-06-14 13:13:20,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149487594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:20,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:20,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:20,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214138435] [2024-06-14 13:13:20,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:20,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:20,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:20,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:20,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:20,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:20,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 302 transitions, 3175 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) [2024-06-14 13:13:20,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:20,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:20,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:22,448 INFO L124 PetriNetUnfolderBase]: 2399/3993 cut-off events. [2024-06-14 13:13:22,448 INFO L125 PetriNetUnfolderBase]: For 250127/250148 co-relation queries the response was YES. [2024-06-14 13:13:22,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26201 conditions, 3993 events. 2399/3993 cut-off events. For 250127/250148 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 24297 event pairs, 528 based on Foata normal form. 16/4002 useless extension candidates. Maximal degree in co-relation 26085. Up to 3643 conditions per place. [2024-06-14 13:13:22,491 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 274 selfloop transitions, 52 changer transitions 0/331 dead transitions. [2024-06-14 13:13:22,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 331 transitions, 4063 flow [2024-06-14 13:13:22,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:22,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:22,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:13:22,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-14 13:13:22,493 INFO L175 Difference]: Start difference. First operand has 254 places, 302 transitions, 3175 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:13:22,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 331 transitions, 4063 flow [2024-06-14 13:13:22,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 331 transitions, 3935 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 13:13:22,960 INFO L231 Difference]: Finished difference. Result has 258 places, 304 transitions, 3193 flow [2024-06-14 13:13:22,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3055, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3193, PETRI_PLACES=258, PETRI_TRANSITIONS=304} [2024-06-14 13:13:22,961 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-14 13:13:22,961 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 304 transitions, 3193 flow [2024-06-14 13:13:22,961 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) [2024-06-14 13:13:22,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:22,961 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] [2024-06-14 13:13:22,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:13:22,962 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)] === [2024-06-14 13:13:22,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:22,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1919800822, now seen corresponding path program 5 times [2024-06-14 13:13:22,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:22,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936104339] [2024-06-14 13:13:22,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:22,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:25,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:25,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936104339] [2024-06-14 13:13:25,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936104339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:25,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:25,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:25,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200892218] [2024-06-14 13:13:25,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:25,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:25,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:25,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:25,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:25,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:25,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 304 transitions, 3193 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) [2024-06-14 13:13:25,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:25,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:25,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:27,709 INFO L124 PetriNetUnfolderBase]: 2430/4038 cut-off events. [2024-06-14 13:13:27,710 INFO L125 PetriNetUnfolderBase]: For 261957/261978 co-relation queries the response was YES. [2024-06-14 13:13:27,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26772 conditions, 4038 events. 2430/4038 cut-off events. For 261957/261978 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 24538 event pairs, 519 based on Foata normal form. 16/4047 useless extension candidates. Maximal degree in co-relation 26654. Up to 3568 conditions per place. [2024-06-14 13:13:27,754 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 254 selfloop transitions, 85 changer transitions 0/344 dead transitions. [2024-06-14 13:13:27,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 344 transitions, 4426 flow [2024-06-14 13:13:27,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:27,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:27,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:13:27,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 13:13:27,755 INFO L175 Difference]: Start difference. First operand has 258 places, 304 transitions, 3193 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:13:27,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 344 transitions, 4426 flow [2024-06-14 13:13:28,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 344 transitions, 4316 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:13:28,266 INFO L231 Difference]: Finished difference. Result has 262 places, 319 transitions, 3530 flow [2024-06-14 13:13:28,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3093, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3530, PETRI_PLACES=262, PETRI_TRANSITIONS=319} [2024-06-14 13:13:28,267 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-14 13:13:28,267 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 319 transitions, 3530 flow [2024-06-14 13:13:28,267 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) [2024-06-14 13:13:28,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:28,267 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] [2024-06-14 13:13:28,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:13:28,267 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:28,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:28,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1919979568, now seen corresponding path program 8 times [2024-06-14 13:13:28,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:28,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475434351] [2024-06-14 13:13:28,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:28,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:31,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:31,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:31,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475434351] [2024-06-14 13:13:31,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475434351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:31,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:31,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:31,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397225812] [2024-06-14 13:13:31,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:31,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:31,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:31,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:31,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:31,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:31,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 319 transitions, 3530 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) [2024-06-14 13:13:31,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:31,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:31,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:32,749 INFO L124 PetriNetUnfolderBase]: 2443/4056 cut-off events. [2024-06-14 13:13:32,749 INFO L125 PetriNetUnfolderBase]: For 270954/270975 co-relation queries the response was YES. [2024-06-14 13:13:32,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27489 conditions, 4056 events. 2443/4056 cut-off events. For 270954/270975 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 24647 event pairs, 531 based on Foata normal form. 15/4064 useless extension candidates. Maximal degree in co-relation 27368. Up to 3702 conditions per place. [2024-06-14 13:13:32,788 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 277 selfloop transitions, 63 changer transitions 0/345 dead transitions. [2024-06-14 13:13:32,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 345 transitions, 4504 flow [2024-06-14 13:13:32,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:32,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:13:32,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 13:13:32,790 INFO L175 Difference]: Start difference. First operand has 262 places, 319 transitions, 3530 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:13:32,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 345 transitions, 4504 flow [2024-06-14 13:13:33,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 345 transitions, 4414 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-14 13:13:33,266 INFO L231 Difference]: Finished difference. Result has 269 places, 325 transitions, 3700 flow [2024-06-14 13:13:33,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3440, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3700, PETRI_PLACES=269, PETRI_TRANSITIONS=325} [2024-06-14 13:13:33,267 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-14 13:13:33,267 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 325 transitions, 3700 flow [2024-06-14 13:13:33,267 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) [2024-06-14 13:13:33,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:33,267 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] [2024-06-14 13:13:33,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:13:33,267 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:33,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:33,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1920216532, now seen corresponding path program 6 times [2024-06-14 13:13:33,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:33,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315233408] [2024-06-14 13:13:33,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:33,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:36,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:36,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315233408] [2024-06-14 13:13:36,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315233408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:36,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:36,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:36,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279625420] [2024-06-14 13:13:36,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:36,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:36,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:36,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:36,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:36,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:36,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 325 transitions, 3700 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) [2024-06-14 13:13:36,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:36,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:36,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:37,961 INFO L124 PetriNetUnfolderBase]: 2437/4052 cut-off events. [2024-06-14 13:13:37,961 INFO L125 PetriNetUnfolderBase]: For 275143/275164 co-relation queries the response was YES. [2024-06-14 13:13:37,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27314 conditions, 4052 events. 2437/4052 cut-off events. For 275143/275164 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 24714 event pairs, 532 based on Foata normal form. 16/4061 useless extension candidates. Maximal degree in co-relation 27190. Up to 3704 conditions per place. [2024-06-14 13:13:38,002 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 288 selfloop transitions, 52 changer transitions 0/345 dead transitions. [2024-06-14 13:13:38,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 345 transitions, 4440 flow [2024-06-14 13:13:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:38,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:38,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 13:13:38,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 13:13:38,003 INFO L175 Difference]: Start difference. First operand has 269 places, 325 transitions, 3700 flow. Second operand 8 states and 130 transitions. [2024-06-14 13:13:38,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 345 transitions, 4440 flow [2024-06-14 13:13:38,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 345 transitions, 4280 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 13:13:38,560 INFO L231 Difference]: Finished difference. Result has 272 places, 325 transitions, 3650 flow [2024-06-14 13:13:38,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3540, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3650, PETRI_PLACES=272, PETRI_TRANSITIONS=325} [2024-06-14 13:13:38,560 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 228 predicate places. [2024-06-14 13:13:38,560 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 325 transitions, 3650 flow [2024-06-14 13:13:38,561 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) [2024-06-14 13:13:38,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:38,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:38,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:13:38,561 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)] === [2024-06-14 13:13:38,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:38,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1900238692, now seen corresponding path program 9 times [2024-06-14 13:13:38,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:38,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997997896] [2024-06-14 13:13:38,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:38,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:41,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:41,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997997896] [2024-06-14 13:13:41,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997997896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:41,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:41,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:41,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615146188] [2024-06-14 13:13:41,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:41,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:41,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:41,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:41,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:41,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:41,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 325 transitions, 3650 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) [2024-06-14 13:13:41,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:41,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:41,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:43,590 INFO L124 PetriNetUnfolderBase]: 2434/4044 cut-off events. [2024-06-14 13:13:43,590 INFO L125 PetriNetUnfolderBase]: For 277707/277728 co-relation queries the response was YES. [2024-06-14 13:13:43,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27235 conditions, 4044 events. 2434/4044 cut-off events. For 277707/277728 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 24600 event pairs, 528 based on Foata normal form. 15/4052 useless extension candidates. Maximal degree in co-relation 27111. Up to 3691 conditions per place. [2024-06-14 13:13:43,628 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 277 selfloop transitions, 64 changer transitions 0/346 dead transitions. [2024-06-14 13:13:43,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 346 transitions, 4394 flow [2024-06-14 13:13:43,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:13:43,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:13:43,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-14 13:13:43,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3581395348837209 [2024-06-14 13:13:43,630 INFO L175 Difference]: Start difference. First operand has 272 places, 325 transitions, 3650 flow. Second operand 10 states and 154 transitions. [2024-06-14 13:13:43,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 346 transitions, 4394 flow [2024-06-14 13:13:44,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 346 transitions, 4242 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 13:13:44,183 INFO L231 Difference]: Finished difference. Result has 275 places, 325 transitions, 3632 flow [2024-06-14 13:13:44,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3498, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3632, PETRI_PLACES=275, PETRI_TRANSITIONS=325} [2024-06-14 13:13:44,184 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-14 13:13:44,184 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 325 transitions, 3632 flow [2024-06-14 13:13:44,184 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) [2024-06-14 13:13:44,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:44,184 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] [2024-06-14 13:13:44,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:13:44,184 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)] === [2024-06-14 13:13:44,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:44,184 INFO L85 PathProgramCache]: Analyzing trace with hash 220908328, now seen corresponding path program 7 times [2024-06-14 13:13:44,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:44,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476511068] [2024-06-14 13:13:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:44,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:47,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:47,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476511068] [2024-06-14 13:13:47,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476511068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:47,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:47,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:47,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46135825] [2024-06-14 13:13:47,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:47,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:47,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:47,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:47,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:47,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:47,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 325 transitions, 3632 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) [2024-06-14 13:13:47,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:47,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:47,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:48,869 INFO L124 PetriNetUnfolderBase]: 2460/4084 cut-off events. [2024-06-14 13:13:48,869 INFO L125 PetriNetUnfolderBase]: For 292662/292683 co-relation queries the response was YES. [2024-06-14 13:13:48,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27718 conditions, 4084 events. 2460/4084 cut-off events. For 292662/292683 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24897 event pairs, 519 based on Foata normal form. 16/4093 useless extension candidates. Maximal degree in co-relation 27593. Up to 3602 conditions per place. [2024-06-14 13:13:48,916 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 257 selfloop transitions, 93 changer transitions 0/355 dead transitions. [2024-06-14 13:13:48,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 355 transitions, 4775 flow [2024-06-14 13:13:48,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:13:48,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:13:48,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 13:13:48,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-14 13:13:48,918 INFO L175 Difference]: Start difference. First operand has 275 places, 325 transitions, 3632 flow. Second operand 7 states and 125 transitions. [2024-06-14 13:13:48,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 355 transitions, 4775 flow [2024-06-14 13:13:49,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 355 transitions, 4621 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 13:13:49,578 INFO L231 Difference]: Finished difference. Result has 272 places, 331 transitions, 3769 flow [2024-06-14 13:13:49,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3478, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3769, PETRI_PLACES=272, PETRI_TRANSITIONS=331} [2024-06-14 13:13:49,579 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 228 predicate places. [2024-06-14 13:13:49,579 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 331 transitions, 3769 flow [2024-06-14 13:13:49,579 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) [2024-06-14 13:13:49,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:49,579 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] [2024-06-14 13:13:49,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:13:49,580 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)] === [2024-06-14 13:13:49,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:49,580 INFO L85 PathProgramCache]: Analyzing trace with hash 220729582, now seen corresponding path program 10 times [2024-06-14 13:13:49,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:49,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016050799] [2024-06-14 13:13:49,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:49,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:52,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:52,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016050799] [2024-06-14 13:13:52,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016050799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:52,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:52,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:52,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127191163] [2024-06-14 13:13:52,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:52,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:52,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:52,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:52,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:52,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:52,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 331 transitions, 3769 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) [2024-06-14 13:13:52,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:52,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:52,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:54,037 INFO L124 PetriNetUnfolderBase]: 2457/4080 cut-off events. [2024-06-14 13:13:54,037 INFO L125 PetriNetUnfolderBase]: For 295839/295860 co-relation queries the response was YES. [2024-06-14 13:13:54,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27869 conditions, 4080 events. 2457/4080 cut-off events. For 295839/295860 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24790 event pairs, 535 based on Foata normal form. 15/4088 useless extension candidates. Maximal degree in co-relation 27744. Up to 3662 conditions per place. [2024-06-14 13:13:54,088 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 266 selfloop transitions, 87 changer transitions 0/358 dead transitions. [2024-06-14 13:13:54,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 358 transitions, 4699 flow [2024-06-14 13:13:54,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:13:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:13:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 13:13:54,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-14 13:13:54,090 INFO L175 Difference]: Start difference. First operand has 272 places, 331 transitions, 3769 flow. Second operand 7 states and 128 transitions. [2024-06-14 13:13:54,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 358 transitions, 4699 flow [2024-06-14 13:13:54,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 358 transitions, 4526 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 13:13:54,743 INFO L231 Difference]: Finished difference. Result has 275 places, 331 transitions, 3786 flow [2024-06-14 13:13:54,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3598, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3786, PETRI_PLACES=275, PETRI_TRANSITIONS=331} [2024-06-14 13:13:54,743 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-14 13:13:54,743 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 331 transitions, 3786 flow [2024-06-14 13:13:54,743 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) [2024-06-14 13:13:54,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:54,744 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] [2024-06-14 13:13:54,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:13:54,744 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)] === [2024-06-14 13:13:54,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:54,744 INFO L85 PathProgramCache]: Analyzing trace with hash 226957048, now seen corresponding path program 8 times [2024-06-14 13:13:54,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:54,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243412202] [2024-06-14 13:13:54,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:54,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:57,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:57,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243412202] [2024-06-14 13:13:57,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243412202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:57,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:57,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:57,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733978868] [2024-06-14 13:13:57,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:57,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:57,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:57,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:57,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:57,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:57,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 331 transitions, 3786 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) [2024-06-14 13:13:57,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:57,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:57,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:59,485 INFO L124 PetriNetUnfolderBase]: 2467/4097 cut-off events. [2024-06-14 13:13:59,485 INFO L125 PetriNetUnfolderBase]: For 300064/300104 co-relation queries the response was YES. [2024-06-14 13:13:59,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27904 conditions, 4097 events. 2467/4097 cut-off events. For 300064/300104 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24971 event pairs, 539 based on Foata normal form. 24/4111 useless extension candidates. Maximal degree in co-relation 27779. Up to 3608 conditions per place. [2024-06-14 13:13:59,526 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 256 selfloop transitions, 92 changer transitions 0/353 dead transitions. [2024-06-14 13:13:59,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 353 transitions, 4877 flow [2024-06-14 13:13:59,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:13:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:13:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:13:59,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:13:59,527 INFO L175 Difference]: Start difference. First operand has 275 places, 331 transitions, 3786 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:13:59,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 353 transitions, 4877 flow [2024-06-14 13:14:00,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 353 transitions, 4633 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 13:14:00,206 INFO L231 Difference]: Finished difference. Result has 274 places, 334 transitions, 3797 flow [2024-06-14 13:14:00,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3550, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3797, PETRI_PLACES=274, PETRI_TRANSITIONS=334} [2024-06-14 13:14:00,207 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-14 13:14:00,207 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 334 transitions, 3797 flow [2024-06-14 13:14:00,207 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) [2024-06-14 13:14:00,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:00,207 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] [2024-06-14 13:14:00,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:14:00,207 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)] === [2024-06-14 13:14:00,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:00,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1500824504, now seen corresponding path program 11 times [2024-06-14 13:14:00,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:00,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722645162] [2024-06-14 13:14:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:00,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:03,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:03,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722645162] [2024-06-14 13:14:03,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722645162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:03,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:03,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:03,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794305624] [2024-06-14 13:14:03,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:03,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:03,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:03,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:03,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:03,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:03,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 334 transitions, 3797 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) [2024-06-14 13:14:03,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:03,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:03,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:05,431 INFO L124 PetriNetUnfolderBase]: 2464/4090 cut-off events. [2024-06-14 13:14:05,431 INFO L125 PetriNetUnfolderBase]: For 286039/286060 co-relation queries the response was YES. [2024-06-14 13:14:05,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27702 conditions, 4090 events. 2464/4090 cut-off events. For 286039/286060 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24922 event pairs, 537 based on Foata normal form. 15/4098 useless extension candidates. Maximal degree in co-relation 27577. Up to 3673 conditions per place. [2024-06-14 13:14:05,481 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 276 selfloop transitions, 90 changer transitions 0/371 dead transitions. [2024-06-14 13:14:05,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 371 transitions, 4779 flow [2024-06-14 13:14:05,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:14:05,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:14:05,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:14:05,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:14:05,482 INFO L175 Difference]: Start difference. First operand has 274 places, 334 transitions, 3797 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:14:05,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 371 transitions, 4779 flow [2024-06-14 13:14:06,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 371 transitions, 4461 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-14 13:14:06,073 INFO L231 Difference]: Finished difference. Result has 278 places, 334 transitions, 3677 flow [2024-06-14 13:14:06,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3479, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3677, PETRI_PLACES=278, PETRI_TRANSITIONS=334} [2024-06-14 13:14:06,073 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-14 13:14:06,073 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 334 transitions, 3677 flow [2024-06-14 13:14:06,073 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) [2024-06-14 13:14:06,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:06,073 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] [2024-06-14 13:14:06,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:14:06,074 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:06,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:06,074 INFO L85 PathProgramCache]: Analyzing trace with hash 43360912, now seen corresponding path program 12 times [2024-06-14 13:14:06,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:06,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065535196] [2024-06-14 13:14:06,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:06,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:09,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:09,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065535196] [2024-06-14 13:14:09,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065535196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:09,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:09,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:09,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635542835] [2024-06-14 13:14:09,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:09,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:09,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:09,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:09,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:09,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:09,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 334 transitions, 3677 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) [2024-06-14 13:14:09,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:09,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:09,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:11,493 INFO L124 PetriNetUnfolderBase]: 2461/4081 cut-off events. [2024-06-14 13:14:11,493 INFO L125 PetriNetUnfolderBase]: For 290243/290252 co-relation queries the response was YES. [2024-06-14 13:14:11,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27339 conditions, 4081 events. 2461/4081 cut-off events. For 290243/290252 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24797 event pairs, 533 based on Foata normal form. 9/4086 useless extension candidates. Maximal degree in co-relation 27214. Up to 3670 conditions per place. [2024-06-14 13:14:11,531 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 278 selfloop transitions, 90 changer transitions 0/373 dead transitions. [2024-06-14 13:14:11,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 373 transitions, 4529 flow [2024-06-14 13:14:11,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:14:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:14:11,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:14:11,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 13:14:11,532 INFO L175 Difference]: Start difference. First operand has 278 places, 334 transitions, 3677 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:14:11,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 373 transitions, 4529 flow [2024-06-14 13:14:12,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 373 transitions, 4305 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-14 13:14:12,250 INFO L231 Difference]: Finished difference. Result has 276 places, 334 transitions, 3651 flow [2024-06-14 13:14:12,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3453, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3651, PETRI_PLACES=276, PETRI_TRANSITIONS=334} [2024-06-14 13:14:12,251 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-14 13:14:12,251 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 334 transitions, 3651 flow [2024-06-14 13:14:12,251 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) [2024-06-14 13:14:12,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:12,251 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] [2024-06-14 13:14:12,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:14:12,251 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:12,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:12,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1500824318, now seen corresponding path program 9 times [2024-06-14 13:14:12,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:12,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618887230] [2024-06-14 13:14:12,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:12,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:15,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:15,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618887230] [2024-06-14 13:14:15,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618887230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:15,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:15,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:15,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651170248] [2024-06-14 13:14:15,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:15,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:15,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:15,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:15,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:15,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:15,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 334 transitions, 3651 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) [2024-06-14 13:14:15,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:15,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:15,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:16,665 INFO L124 PetriNetUnfolderBase]: 2455/4074 cut-off events. [2024-06-14 13:14:16,665 INFO L125 PetriNetUnfolderBase]: For 272631/272652 co-relation queries the response was YES. [2024-06-14 13:14:16,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26926 conditions, 4074 events. 2455/4074 cut-off events. For 272631/272652 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24803 event pairs, 534 based on Foata normal form. 16/4083 useless extension candidates. Maximal degree in co-relation 26803. Up to 3718 conditions per place. [2024-06-14 13:14:16,710 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 295 selfloop transitions, 57 changer transitions 0/357 dead transitions. [2024-06-14 13:14:16,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 357 transitions, 4425 flow [2024-06-14 13:14:16,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:16,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:16,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:14:16,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 13:14:16,711 INFO L175 Difference]: Start difference. First operand has 276 places, 334 transitions, 3651 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:14:16,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 357 transitions, 4425 flow [2024-06-14 13:14:17,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 357 transitions, 4215 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-14 13:14:17,204 INFO L231 Difference]: Finished difference. Result has 274 places, 334 transitions, 3569 flow [2024-06-14 13:14:17,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3441, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3569, PETRI_PLACES=274, PETRI_TRANSITIONS=334} [2024-06-14 13:14:17,205 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-14 13:14:17,205 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 334 transitions, 3569 flow [2024-06-14 13:14:17,205 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) [2024-06-14 13:14:17,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:17,205 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] [2024-06-14 13:14:17,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:14:17,205 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:17,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:17,205 INFO L85 PathProgramCache]: Analyzing trace with hash 448809478, now seen corresponding path program 10 times [2024-06-14 13:14:17,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:17,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037404574] [2024-06-14 13:14:17,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:17,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:20,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:20,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037404574] [2024-06-14 13:14:20,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037404574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:20,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:20,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:20,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484985759] [2024-06-14 13:14:20,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:20,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:20,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:20,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:20,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:20,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:20,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 334 transitions, 3569 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) [2024-06-14 13:14:20,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:20,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:20,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:21,735 INFO L124 PetriNetUnfolderBase]: 2449/4071 cut-off events. [2024-06-14 13:14:21,735 INFO L125 PetriNetUnfolderBase]: For 254933/254973 co-relation queries the response was YES. [2024-06-14 13:14:21,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26438 conditions, 4071 events. 2449/4071 cut-off events. For 254933/254973 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24870 event pairs, 537 based on Foata normal form. 24/4085 useless extension candidates. Maximal degree in co-relation 26315. Up to 3590 conditions per place. [2024-06-14 13:14:21,784 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 256 selfloop transitions, 92 changer transitions 0/353 dead transitions. [2024-06-14 13:14:21,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 353 transitions, 4587 flow [2024-06-14 13:14:21,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:21,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:21,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:14:21,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:14:21,786 INFO L175 Difference]: Start difference. First operand has 274 places, 334 transitions, 3569 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:14:21,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 353 transitions, 4587 flow [2024-06-14 13:14:22,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 353 transitions, 4435 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 13:14:22,331 INFO L231 Difference]: Finished difference. Result has 273 places, 334 transitions, 3615 flow [2024-06-14 13:14:22,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3425, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3615, PETRI_PLACES=273, PETRI_TRANSITIONS=334} [2024-06-14 13:14:22,331 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-14 13:14:22,331 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 334 transitions, 3615 flow [2024-06-14 13:14:22,331 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) [2024-06-14 13:14:22,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:22,332 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] [2024-06-14 13:14:22,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:14:22,332 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:22,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:22,332 INFO L85 PathProgramCache]: Analyzing trace with hash 43361098, now seen corresponding path program 11 times [2024-06-14 13:14:22,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:22,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275462848] [2024-06-14 13:14:22,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:22,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:25,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:25,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275462848] [2024-06-14 13:14:25,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275462848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:25,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:25,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:25,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310389888] [2024-06-14 13:14:25,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:25,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:25,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:25,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:25,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:25,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:25,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 334 transitions, 3615 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) [2024-06-14 13:14:25,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:25,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:25,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:26,944 INFO L124 PetriNetUnfolderBase]: 2443/4057 cut-off events. [2024-06-14 13:14:26,944 INFO L125 PetriNetUnfolderBase]: For 242511/242520 co-relation queries the response was YES. [2024-06-14 13:14:26,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26230 conditions, 4057 events. 2443/4057 cut-off events. For 242511/242520 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24696 event pairs, 525 based on Foata normal form. 10/4063 useless extension candidates. Maximal degree in co-relation 26108. Up to 3651 conditions per place. [2024-06-14 13:14:26,993 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 282 selfloop transitions, 78 changer transitions 0/365 dead transitions. [2024-06-14 13:14:26,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 365 transitions, 4555 flow [2024-06-14 13:14:26,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:14:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:14:26,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:14:26,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-14 13:14:26,995 INFO L175 Difference]: Start difference. First operand has 273 places, 334 transitions, 3615 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:14:26,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 365 transitions, 4555 flow [2024-06-14 13:14:27,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 365 transitions, 4368 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 13:14:27,507 INFO L231 Difference]: Finished difference. Result has 278 places, 334 transitions, 3598 flow [2024-06-14 13:14:27,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3428, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3598, PETRI_PLACES=278, PETRI_TRANSITIONS=334} [2024-06-14 13:14:27,508 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-14 13:14:27,508 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 334 transitions, 3598 flow [2024-06-14 13:14:27,508 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) [2024-06-14 13:14:27,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:27,508 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] [2024-06-14 13:14:27,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:14:27,509 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:27,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:27,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1758968724, now seen corresponding path program 12 times [2024-06-14 13:14:27,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:27,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502021199] [2024-06-14 13:14:27,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:27,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:30,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:30,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502021199] [2024-06-14 13:14:30,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502021199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:30,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:30,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:30,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856649972] [2024-06-14 13:14:30,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:30,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:30,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:30,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:30,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:30,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:30,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 334 transitions, 3598 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) [2024-06-14 13:14:30,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:30,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:30,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:31,882 INFO L124 PetriNetUnfolderBase]: 2437/4051 cut-off events. [2024-06-14 13:14:31,882 INFO L125 PetriNetUnfolderBase]: For 244472/244481 co-relation queries the response was YES. [2024-06-14 13:14:31,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26112 conditions, 4051 events. 2437/4051 cut-off events. For 244472/244481 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24720 event pairs, 525 based on Foata normal form. 10/4057 useless extension candidates. Maximal degree in co-relation 25989. Up to 3646 conditions per place. [2024-06-14 13:14:31,930 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 279 selfloop transitions, 73 changer transitions 0/357 dead transitions. [2024-06-14 13:14:31,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 357 transitions, 4370 flow [2024-06-14 13:14:31,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:31,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:31,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:14:31,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-14 13:14:31,931 INFO L175 Difference]: Start difference. First operand has 278 places, 334 transitions, 3598 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:14:31,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 357 transitions, 4370 flow [2024-06-14 13:14:32,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 357 transitions, 4154 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-14 13:14:32,394 INFO L231 Difference]: Finished difference. Result has 275 places, 334 transitions, 3538 flow [2024-06-14 13:14:32,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3382, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3538, PETRI_PLACES=275, PETRI_TRANSITIONS=334} [2024-06-14 13:14:32,395 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-14 13:14:32,395 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 334 transitions, 3538 flow [2024-06-14 13:14:32,396 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) [2024-06-14 13:14:32,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:32,396 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] [2024-06-14 13:14:32,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:14:32,396 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:32,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:32,397 INFO L85 PathProgramCache]: Analyzing trace with hash 456914056, now seen corresponding path program 2 times [2024-06-14 13:14:32,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:32,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555419943] [2024-06-14 13:14:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:32,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:32,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:35,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:35,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555419943] [2024-06-14 13:14:35,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555419943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:35,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:35,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:35,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316409431] [2024-06-14 13:14:35,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:35,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:35,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:35,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:35,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:36,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:14:36,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 334 transitions, 3538 flow. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:36,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:36,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:14:36,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:37,427 INFO L124 PetriNetUnfolderBase]: 2330/3903 cut-off events. [2024-06-14 13:14:37,427 INFO L125 PetriNetUnfolderBase]: For 259237/259261 co-relation queries the response was YES. [2024-06-14 13:14:37,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25287 conditions, 3903 events. 2330/3903 cut-off events. For 259237/259261 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24060 event pairs, 493 based on Foata normal form. 30/3884 useless extension candidates. Maximal degree in co-relation 25165. Up to 3367 conditions per place. [2024-06-14 13:14:37,470 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 251 selfloop transitions, 50 changer transitions 0/354 dead transitions. [2024-06-14 13:14:37,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 354 transitions, 4230 flow [2024-06-14 13:14:37,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:37,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:14:37,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 13:14:37,472 INFO L175 Difference]: Start difference. First operand has 275 places, 334 transitions, 3538 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:14:37,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 354 transitions, 4230 flow [2024-06-14 13:14:37,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 354 transitions, 4078 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 13:14:37,959 INFO L231 Difference]: Finished difference. Result has 275 places, 335 transitions, 3512 flow [2024-06-14 13:14:37,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3512, PETRI_PLACES=275, PETRI_TRANSITIONS=335} [2024-06-14 13:14:37,960 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-14 13:14:37,960 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 335 transitions, 3512 flow [2024-06-14 13:14:37,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:37,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:37,960 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] [2024-06-14 13:14:37,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:14:37,960 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:37,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:37,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1758977652, now seen corresponding path program 3 times [2024-06-14 13:14:37,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:37,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428763866] [2024-06-14 13:14:37,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:37,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:41,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:41,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428763866] [2024-06-14 13:14:41,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428763866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:41,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:41,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:41,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866661562] [2024-06-14 13:14:41,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:41,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:41,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:41,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:41,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:41,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:14:41,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 335 transitions, 3512 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:41,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:41,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:14:41,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:43,161 INFO L124 PetriNetUnfolderBase]: 2362/3974 cut-off events. [2024-06-14 13:14:43,161 INFO L125 PetriNetUnfolderBase]: For 260328/260341 co-relation queries the response was YES. [2024-06-14 13:14:43,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25750 conditions, 3974 events. 2362/3974 cut-off events. For 260328/260341 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24733 event pairs, 505 based on Foata normal form. 21/3959 useless extension candidates. Maximal degree in co-relation 25628. Up to 3388 conditions per place. [2024-06-14 13:14:43,208 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 263 selfloop transitions, 45 changer transitions 0/361 dead transitions. [2024-06-14 13:14:43,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 361 transitions, 4238 flow [2024-06-14 13:14:43,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:43,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:43,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 13:14:43,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-14 13:14:43,210 INFO L175 Difference]: Start difference. First operand has 275 places, 335 transitions, 3512 flow. Second operand 7 states and 128 transitions. [2024-06-14 13:14:43,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 361 transitions, 4238 flow [2024-06-14 13:14:43,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 361 transitions, 4134 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:14:43,820 INFO L231 Difference]: Finished difference. Result has 277 places, 336 transitions, 3530 flow [2024-06-14 13:14:43,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3408, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3530, PETRI_PLACES=277, PETRI_TRANSITIONS=336} [2024-06-14 13:14:43,820 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-14 13:14:43,820 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 336 transitions, 3530 flow [2024-06-14 13:14:43,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:43,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:43,821 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] [2024-06-14 13:14:43,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:14:43,821 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:43,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:43,822 INFO L85 PathProgramCache]: Analyzing trace with hash 457389286, now seen corresponding path program 4 times [2024-06-14 13:14:43,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:43,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495571174] [2024-06-14 13:14:43,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:43,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:47,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:47,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495571174] [2024-06-14 13:14:47,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495571174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:47,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:47,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:47,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620285448] [2024-06-14 13:14:47,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:47,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:47,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:47,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:47,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:47,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:14:47,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 336 transitions, 3530 flow. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:47,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:47,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:14:47,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:49,095 INFO L124 PetriNetUnfolderBase]: 2368/3973 cut-off events. [2024-06-14 13:14:49,095 INFO L125 PetriNetUnfolderBase]: For 249897/249921 co-relation queries the response was YES. [2024-06-14 13:14:49,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25566 conditions, 3973 events. 2368/3973 cut-off events. For 249897/249921 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24620 event pairs, 497 based on Foata normal form. 26/3950 useless extension candidates. Maximal degree in co-relation 25443. Up to 3305 conditions per place. [2024-06-14 13:14:49,142 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 251 selfloop transitions, 54 changer transitions 0/358 dead transitions. [2024-06-14 13:14:49,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 358 transitions, 4252 flow [2024-06-14 13:14:49,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:49,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:49,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:14:49,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-14 13:14:49,144 INFO L175 Difference]: Start difference. First operand has 277 places, 336 transitions, 3530 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:14:49,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 358 transitions, 4252 flow [2024-06-14 13:14:49,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 358 transitions, 4156 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:14:49,658 INFO L231 Difference]: Finished difference. Result has 279 places, 337 transitions, 3570 flow [2024-06-14 13:14:49,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3436, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3570, PETRI_PLACES=279, PETRI_TRANSITIONS=337} [2024-06-14 13:14:49,658 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-14 13:14:49,658 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 337 transitions, 3570 flow [2024-06-14 13:14:49,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:49,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:49,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:49,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:14:49,659 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:49,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:49,659 INFO L85 PathProgramCache]: Analyzing trace with hash -2038118770, now seen corresponding path program 1 times [2024-06-14 13:14:49,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:49,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571822910] [2024-06-14 13:14:49,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:49,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:52,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:52,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571822910] [2024-06-14 13:14:52,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571822910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:52,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:52,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:52,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999997438] [2024-06-14 13:14:52,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:52,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:52,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:52,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:52,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:52,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:52,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 337 transitions, 3570 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) [2024-06-14 13:14:52,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:52,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:52,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:53,879 INFO L124 PetriNetUnfolderBase]: 2535/4208 cut-off events. [2024-06-14 13:14:53,879 INFO L125 PetriNetUnfolderBase]: For 238323/238325 co-relation queries the response was YES. [2024-06-14 13:14:53,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26744 conditions, 4208 events. 2535/4208 cut-off events. For 238323/238325 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25790 event pairs, 518 based on Foata normal form. 2/4207 useless extension candidates. Maximal degree in co-relation 26620. Up to 3886 conditions per place. [2024-06-14 13:14:53,924 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 332 selfloop transitions, 32 changer transitions 0/369 dead transitions. [2024-06-14 13:14:53,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 369 transitions, 4600 flow [2024-06-14 13:14:53,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:53,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:53,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:14:53,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 13:14:53,926 INFO L175 Difference]: Start difference. First operand has 279 places, 337 transitions, 3570 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:14:53,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 369 transitions, 4600 flow [2024-06-14 13:14:54,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 369 transitions, 4482 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:14:54,372 INFO L231 Difference]: Finished difference. Result has 282 places, 341 transitions, 3617 flow [2024-06-14 13:14:54,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3452, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3617, PETRI_PLACES=282, PETRI_TRANSITIONS=341} [2024-06-14 13:14:54,372 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-14 13:14:54,372 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 341 transitions, 3617 flow [2024-06-14 13:14:54,372 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) [2024-06-14 13:14:54,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:54,373 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] [2024-06-14 13:14:54,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:14:54,373 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:54,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:54,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2035261810, now seen corresponding path program 2 times [2024-06-14 13:14:54,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:54,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718720798] [2024-06-14 13:14:54,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:54,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:56,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:56,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718720798] [2024-06-14 13:14:56,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718720798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:56,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:56,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:56,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700823660] [2024-06-14 13:14:56,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:56,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:56,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:56,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:56,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:57,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:57,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 341 transitions, 3617 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) [2024-06-14 13:14:57,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:57,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:57,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:58,792 INFO L124 PetriNetUnfolderBase]: 2543/4220 cut-off events. [2024-06-14 13:14:58,792 INFO L125 PetriNetUnfolderBase]: For 244313/244315 co-relation queries the response was YES. [2024-06-14 13:14:58,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26801 conditions, 4220 events. 2543/4220 cut-off events. For 244313/244315 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 25863 event pairs, 556 based on Foata normal form. 2/4219 useless extension candidates. Maximal degree in co-relation 26676. Up to 3935 conditions per place. [2024-06-14 13:14:58,834 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 331 selfloop transitions, 29 changer transitions 0/365 dead transitions. [2024-06-14 13:14:58,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 365 transitions, 4447 flow [2024-06-14 13:14:58,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:58,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:58,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:14:58,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 13:14:58,835 INFO L175 Difference]: Start difference. First operand has 282 places, 341 transitions, 3617 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:14:58,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 365 transitions, 4447 flow [2024-06-14 13:14:59,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 365 transitions, 4341 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 13:14:59,347 INFO L231 Difference]: Finished difference. Result has 286 places, 343 transitions, 3628 flow [2024-06-14 13:14:59,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3527, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3628, PETRI_PLACES=286, PETRI_TRANSITIONS=343} [2024-06-14 13:14:59,348 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-14 13:14:59,348 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 343 transitions, 3628 flow [2024-06-14 13:14:59,348 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) [2024-06-14 13:14:59,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:59,348 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] [2024-06-14 13:14:59,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:14:59,348 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:59,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:59,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1919970640, now seen corresponding path program 3 times [2024-06-14 13:14:59,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:59,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884975314] [2024-06-14 13:14:59,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:59,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:02,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:02,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884975314] [2024-06-14 13:15:02,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884975314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:02,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:02,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:15:02,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18310777] [2024-06-14 13:15:02,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:02,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:15:02,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:02,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:15:02,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:15:02,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:02,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 343 transitions, 3628 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) [2024-06-14 13:15:02,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:02,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:02,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:03,690 INFO L124 PetriNetUnfolderBase]: 2551/4232 cut-off events. [2024-06-14 13:15:03,690 INFO L125 PetriNetUnfolderBase]: For 251229/251231 co-relation queries the response was YES. [2024-06-14 13:15:03,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26914 conditions, 4232 events. 2551/4232 cut-off events. For 251229/251231 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 25925 event pairs, 556 based on Foata normal form. 2/4231 useless extension candidates. Maximal degree in co-relation 26787. Up to 3964 conditions per place. [2024-06-14 13:15:03,740 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 337 selfloop transitions, 21 changer transitions 0/363 dead transitions. [2024-06-14 13:15:03,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 363 transitions, 4430 flow [2024-06-14 13:15:03,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:03,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:03,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 13:15:03,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-14 13:15:03,741 INFO L175 Difference]: Start difference. First operand has 286 places, 343 transitions, 3628 flow. Second operand 8 states and 126 transitions. [2024-06-14 13:15:03,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 363 transitions, 4430 flow [2024-06-14 13:15:04,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 363 transitions, 4349 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:04,265 INFO L231 Difference]: Finished difference. Result has 288 places, 345 transitions, 3636 flow [2024-06-14 13:15:04,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3547, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3636, PETRI_PLACES=288, PETRI_TRANSITIONS=345} [2024-06-14 13:15:04,265 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-14 13:15:04,266 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 345 transitions, 3636 flow [2024-06-14 13:15:04,266 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) [2024-06-14 13:15:04,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:04,266 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] [2024-06-14 13:15:04,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:15:04,266 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:04,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:04,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1919785942, now seen corresponding path program 1 times [2024-06-14 13:15:04,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:04,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826447712] [2024-06-14 13:15:04,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:04,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:07,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:07,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826447712] [2024-06-14 13:15:07,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826447712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:07,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:07,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:07,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054266008] [2024-06-14 13:15:07,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:07,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:07,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:07,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:07,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:07,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:07,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 345 transitions, 3636 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) [2024-06-14 13:15:07,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:07,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:07,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:09,324 INFO L124 PetriNetUnfolderBase]: 2559/4240 cut-off events. [2024-06-14 13:15:09,324 INFO L125 PetriNetUnfolderBase]: For 258127/258129 co-relation queries the response was YES. [2024-06-14 13:15:09,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27052 conditions, 4240 events. 2559/4240 cut-off events. For 258127/258129 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 25936 event pairs, 534 based on Foata normal form. 2/4239 useless extension candidates. Maximal degree in co-relation 26924. Up to 3953 conditions per place. [2024-06-14 13:15:09,373 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 335 selfloop transitions, 28 changer transitions 0/368 dead transitions. [2024-06-14 13:15:09,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 368 transitions, 4458 flow [2024-06-14 13:15:09,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:09,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:15:09,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 13:15:09,375 INFO L175 Difference]: Start difference. First operand has 288 places, 345 transitions, 3636 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:15:09,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 368 transitions, 4458 flow [2024-06-14 13:15:09,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 368 transitions, 4389 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:09,904 INFO L231 Difference]: Finished difference. Result has 290 places, 347 transitions, 3674 flow [2024-06-14 13:15:09,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3567, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3674, PETRI_PLACES=290, PETRI_TRANSITIONS=347} [2024-06-14 13:15:09,905 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-14 13:15:09,905 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 347 transitions, 3674 flow [2024-06-14 13:15:09,905 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) [2024-06-14 13:15:09,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:09,905 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] [2024-06-14 13:15:09,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:15:09,905 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:09,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:09,906 INFO L85 PathProgramCache]: Analyzing trace with hash 220738510, now seen corresponding path program 4 times [2024-06-14 13:15:09,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:09,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147335577] [2024-06-14 13:15:09,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:09,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:12,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:12,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147335577] [2024-06-14 13:15:12,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147335577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:12,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:12,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:15:12,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743430443] [2024-06-14 13:15:12,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:12,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:15:12,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:12,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:15:12,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:15:12,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:12,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 347 transitions, 3674 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) [2024-06-14 13:15:12,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:12,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:12,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:14,156 INFO L124 PetriNetUnfolderBase]: 2554/4237 cut-off events. [2024-06-14 13:15:14,156 INFO L125 PetriNetUnfolderBase]: For 260154/260156 co-relation queries the response was YES. [2024-06-14 13:15:14,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27022 conditions, 4237 events. 2554/4237 cut-off events. For 260154/260156 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 25936 event pairs, 517 based on Foata normal form. 2/4236 useless extension candidates. Maximal degree in co-relation 26893. Up to 3927 conditions per place. [2024-06-14 13:15:14,200 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 337 selfloop transitions, 30 changer transitions 0/372 dead transitions. [2024-06-14 13:15:14,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 372 transitions, 4478 flow [2024-06-14 13:15:14,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:15:14,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:15:14,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:15:14,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 13:15:14,202 INFO L175 Difference]: Start difference. First operand has 290 places, 347 transitions, 3674 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:15:14,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 372 transitions, 4478 flow [2024-06-14 13:15:14,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 372 transitions, 4363 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:14,690 INFO L231 Difference]: Finished difference. Result has 291 places, 347 transitions, 3630 flow [2024-06-14 13:15:14,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3559, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3630, PETRI_PLACES=291, PETRI_TRANSITIONS=347} [2024-06-14 13:15:14,691 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-14 13:15:14,691 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 347 transitions, 3630 flow [2024-06-14 13:15:14,691 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) [2024-06-14 13:15:14,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:14,692 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] [2024-06-14 13:15:14,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:15:14,692 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:14,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:14,692 INFO L85 PathProgramCache]: Analyzing trace with hash 457098568, now seen corresponding path program 2 times [2024-06-14 13:15:14,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:14,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697012597] [2024-06-14 13:15:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:14,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:18,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:18,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697012597] [2024-06-14 13:15:18,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697012597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:18,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:18,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:18,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026972555] [2024-06-14 13:15:18,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:18,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:18,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:18,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:18,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:18,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:18,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 347 transitions, 3630 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) [2024-06-14 13:15:18,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:18,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:18,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:19,672 INFO L124 PetriNetUnfolderBase]: 2562/4250 cut-off events. [2024-06-14 13:15:19,673 INFO L125 PetriNetUnfolderBase]: For 267280/267285 co-relation queries the response was YES. [2024-06-14 13:15:19,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27147 conditions, 4250 events. 2562/4250 cut-off events. For 267280/267285 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 26031 event pairs, 540 based on Foata normal form. 4/4250 useless extension candidates. Maximal degree in co-relation 27017. Up to 3958 conditions per place. [2024-06-14 13:15:19,714 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 332 selfloop transitions, 27 changer transitions 0/364 dead transitions. [2024-06-14 13:15:19,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 364 transitions, 4432 flow [2024-06-14 13:15:19,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:15:19,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:15:19,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 13:15:19,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-14 13:15:19,715 INFO L175 Difference]: Start difference. First operand has 291 places, 347 transitions, 3630 flow. Second operand 7 states and 113 transitions. [2024-06-14 13:15:19,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 364 transitions, 4432 flow [2024-06-14 13:15:20,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 364 transitions, 4363 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:20,310 INFO L231 Difference]: Finished difference. Result has 292 places, 349 transitions, 3670 flow [2024-06-14 13:15:20,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3561, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3670, PETRI_PLACES=292, PETRI_TRANSITIONS=349} [2024-06-14 13:15:20,310 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-14 13:15:20,311 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 349 transitions, 3670 flow [2024-06-14 13:15:20,311 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) [2024-06-14 13:15:20,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:20,311 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] [2024-06-14 13:15:20,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:15:20,311 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:20,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:20,311 INFO L85 PathProgramCache]: Analyzing trace with hash 457395238, now seen corresponding path program 3 times [2024-06-14 13:15:20,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:20,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52483829] [2024-06-14 13:15:20,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:20,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:23,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:23,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52483829] [2024-06-14 13:15:23,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52483829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:23,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:23,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:23,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720810092] [2024-06-14 13:15:23,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:23,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:23,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:23,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:23,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:23,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:23,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 349 transitions, 3670 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) [2024-06-14 13:15:23,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:23,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:23,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:25,111 INFO L124 PetriNetUnfolderBase]: 2570/4262 cut-off events. [2024-06-14 13:15:25,111 INFO L125 PetriNetUnfolderBase]: For 268270/268275 co-relation queries the response was YES. [2024-06-14 13:15:25,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27328 conditions, 4262 events. 2570/4262 cut-off events. For 268270/268275 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 26133 event pairs, 532 based on Foata normal form. 4/4262 useless extension candidates. Maximal degree in co-relation 27197. Up to 3941 conditions per place. [2024-06-14 13:15:25,163 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 330 selfloop transitions, 34 changer transitions 0/369 dead transitions. [2024-06-14 13:15:25,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 369 transitions, 4682 flow [2024-06-14 13:15:25,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:15:25,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:15:25,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 13:15:25,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787375415282392 [2024-06-14 13:15:25,164 INFO L175 Difference]: Start difference. First operand has 292 places, 349 transitions, 3670 flow. Second operand 7 states and 114 transitions. [2024-06-14 13:15:25,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 369 transitions, 4682 flow [2024-06-14 13:15:25,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 369 transitions, 4589 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:15:25,744 INFO L231 Difference]: Finished difference. Result has 294 places, 353 transitions, 3754 flow [2024-06-14 13:15:25,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3577, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3754, PETRI_PLACES=294, PETRI_TRANSITIONS=353} [2024-06-14 13:15:25,744 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-14 13:15:25,744 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 353 transitions, 3754 flow [2024-06-14 13:15:25,744 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) [2024-06-14 13:15:25,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:25,745 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] [2024-06-14 13:15:25,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:15:25,745 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:25,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:25,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1500393728, now seen corresponding path program 4 times [2024-06-14 13:15:25,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:25,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122858795] [2024-06-14 13:15:25,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:25,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:29,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:29,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122858795] [2024-06-14 13:15:29,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122858795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:29,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:29,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:29,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911023553] [2024-06-14 13:15:29,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:29,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:29,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:29,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:29,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:29,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:29,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 353 transitions, 3754 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) [2024-06-14 13:15:29,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:29,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:29,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:30,634 INFO L124 PetriNetUnfolderBase]: 2565/4250 cut-off events. [2024-06-14 13:15:30,635 INFO L125 PetriNetUnfolderBase]: For 269908/269910 co-relation queries the response was YES. [2024-06-14 13:15:30,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27237 conditions, 4250 events. 2565/4250 cut-off events. For 269908/269910 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 25952 event pairs, 534 based on Foata normal form. 2/4249 useless extension candidates. Maximal degree in co-relation 27105. Up to 3957 conditions per place. [2024-06-14 13:15:30,686 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 338 selfloop transitions, 30 changer transitions 0/373 dead transitions. [2024-06-14 13:15:30,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 373 transitions, 4542 flow [2024-06-14 13:15:30,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:15:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:15:30,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:15:30,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:15:30,688 INFO L175 Difference]: Start difference. First operand has 294 places, 353 transitions, 3754 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:15:30,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 373 transitions, 4542 flow [2024-06-14 13:15:31,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 373 transitions, 4432 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-14 13:15:31,245 INFO L231 Difference]: Finished difference. Result has 298 places, 353 transitions, 3712 flow [2024-06-14 13:15:31,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3644, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3712, PETRI_PLACES=298, PETRI_TRANSITIONS=353} [2024-06-14 13:15:31,246 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-14 13:15:31,246 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 353 transitions, 3712 flow [2024-06-14 13:15:31,246 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) [2024-06-14 13:15:31,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:31,246 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] [2024-06-14 13:15:31,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:15:31,246 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:31,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:31,246 INFO L85 PathProgramCache]: Analyzing trace with hash -2105181709, now seen corresponding path program 1 times [2024-06-14 13:15:31,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:31,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935887626] [2024-06-14 13:15:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:31,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:34,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:34,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935887626] [2024-06-14 13:15:34,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935887626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:34,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:34,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:34,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992241615] [2024-06-14 13:15:34,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:34,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:34,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:34,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:34,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:34,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:34,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 353 transitions, 3712 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) [2024-06-14 13:15:34,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:34,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:34,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:36,661 INFO L124 PetriNetUnfolderBase]: 2641/4384 cut-off events. [2024-06-14 13:15:36,661 INFO L125 PetriNetUnfolderBase]: For 292981/292987 co-relation queries the response was YES. [2024-06-14 13:15:36,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27934 conditions, 4384 events. 2641/4384 cut-off events. For 292981/292987 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 26907 event pairs, 457 based on Foata normal form. 14/4395 useless extension candidates. Maximal degree in co-relation 27800. Up to 3762 conditions per place. [2024-06-14 13:15:36,715 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 343 selfloop transitions, 59 changer transitions 0/407 dead transitions. [2024-06-14 13:15:36,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 407 transitions, 4895 flow [2024-06-14 13:15:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:15:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:15:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-14 13:15:36,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39957716701902746 [2024-06-14 13:15:36,716 INFO L175 Difference]: Start difference. First operand has 298 places, 353 transitions, 3712 flow. Second operand 11 states and 189 transitions. [2024-06-14 13:15:36,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 407 transitions, 4895 flow [2024-06-14 13:15:37,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 407 transitions, 4823 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:37,314 INFO L231 Difference]: Finished difference. Result has 305 places, 358 transitions, 3851 flow [2024-06-14 13:15:37,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3640, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3851, PETRI_PLACES=305, PETRI_TRANSITIONS=358} [2024-06-14 13:15:37,315 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-14 13:15:37,315 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 358 transitions, 3851 flow [2024-06-14 13:15:37,315 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) [2024-06-14 13:15:37,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:37,315 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] [2024-06-14 13:15:37,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:15:37,315 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:37,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:37,315 INFO L85 PathProgramCache]: Analyzing trace with hash 689020329, now seen corresponding path program 2 times [2024-06-14 13:15:37,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:37,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293755637] [2024-06-14 13:15:37,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:37,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:41,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:41,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293755637] [2024-06-14 13:15:41,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293755637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:41,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:41,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:41,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287241456] [2024-06-14 13:15:41,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:41,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:41,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:41,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:41,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:41,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:41,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 358 transitions, 3851 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) [2024-06-14 13:15:41,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:41,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:41,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:43,011 INFO L124 PetriNetUnfolderBase]: 2733/4528 cut-off events. [2024-06-14 13:15:43,011 INFO L125 PetriNetUnfolderBase]: For 302474/302480 co-relation queries the response was YES. [2024-06-14 13:15:43,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29198 conditions, 4528 events. 2733/4528 cut-off events. For 302474/302480 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27960 event pairs, 557 based on Foata normal form. 14/4539 useless extension candidates. Maximal degree in co-relation 29061. Up to 4048 conditions per place. [2024-06-14 13:15:43,070 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 347 selfloop transitions, 64 changer transitions 0/416 dead transitions. [2024-06-14 13:15:43,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 416 transitions, 5001 flow [2024-06-14 13:15:43,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:15:43,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:15:43,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 196 transitions. [2024-06-14 13:15:43,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 13:15:43,072 INFO L175 Difference]: Start difference. First operand has 305 places, 358 transitions, 3851 flow. Second operand 12 states and 196 transitions. [2024-06-14 13:15:43,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 416 transitions, 5001 flow [2024-06-14 13:15:43,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 416 transitions, 4825 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 13:15:43,788 INFO L231 Difference]: Finished difference. Result has 310 places, 371 transitions, 3995 flow [2024-06-14 13:15:43,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3691, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3995, PETRI_PLACES=310, PETRI_TRANSITIONS=371} [2024-06-14 13:15:43,788 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-14 13:15:43,788 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 371 transitions, 3995 flow [2024-06-14 13:15:43,789 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) [2024-06-14 13:15:43,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:43,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:43,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:15:43,789 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:43,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:43,790 INFO L85 PathProgramCache]: Analyzing trace with hash 511860909, now seen corresponding path program 1 times [2024-06-14 13:15:43,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:43,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729333609] [2024-06-14 13:15:43,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:43,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:47,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:47,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729333609] [2024-06-14 13:15:47,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729333609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:47,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:47,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:47,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37195954] [2024-06-14 13:15:47,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:47,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:47,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:47,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:47,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:47,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:47,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 371 transitions, 3995 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) [2024-06-14 13:15:47,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:47,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:47,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:48,943 INFO L124 PetriNetUnfolderBase]: 2746/4548 cut-off events. [2024-06-14 13:15:48,943 INFO L125 PetriNetUnfolderBase]: For 292808/292814 co-relation queries the response was YES. [2024-06-14 13:15:48,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29328 conditions, 4548 events. 2746/4548 cut-off events. For 292808/292814 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 28050 event pairs, 579 based on Foata normal form. 7/4552 useless extension candidates. Maximal degree in co-relation 29191. Up to 4124 conditions per place. [2024-06-14 13:15:48,997 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 348 selfloop transitions, 63 changer transitions 0/416 dead transitions. [2024-06-14 13:15:48,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 416 transitions, 5203 flow [2024-06-14 13:15:48,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:15:48,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:15:48,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:15:48,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:15:48,998 INFO L175 Difference]: Start difference. First operand has 310 places, 371 transitions, 3995 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:15:48,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 416 transitions, 5203 flow [2024-06-14 13:15:49,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 416 transitions, 5069 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:15:49,859 INFO L231 Difference]: Finished difference. Result has 312 places, 377 transitions, 4119 flow [2024-06-14 13:15:49,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3861, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4119, PETRI_PLACES=312, PETRI_TRANSITIONS=377} [2024-06-14 13:15:49,859 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-14 13:15:49,859 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 377 transitions, 4119 flow [2024-06-14 13:15:49,860 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) [2024-06-14 13:15:49,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:49,860 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] [2024-06-14 13:15:49,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:15:49,860 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:49,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:49,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1372095361, now seen corresponding path program 1 times [2024-06-14 13:15:49,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:49,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477920930] [2024-06-14 13:15:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:49,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:53,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:53,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477920930] [2024-06-14 13:15:53,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477920930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:53,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:53,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:53,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496352935] [2024-06-14 13:15:53,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:53,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:53,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:53,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:53,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:53,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:53,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 377 transitions, 4119 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) [2024-06-14 13:15:53,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:53,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:53,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:55,444 INFO L124 PetriNetUnfolderBase]: 2782/4598 cut-off events. [2024-06-14 13:15:55,444 INFO L125 PetriNetUnfolderBase]: For 311809/311815 co-relation queries the response was YES. [2024-06-14 13:15:55,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30267 conditions, 4598 events. 2782/4598 cut-off events. For 311809/311815 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 28403 event pairs, 567 based on Foata normal form. 8/4603 useless extension candidates. Maximal degree in co-relation 30129. Up to 4121 conditions per place. [2024-06-14 13:15:55,495 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 345 selfloop transitions, 80 changer transitions 0/430 dead transitions. [2024-06-14 13:15:55,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 430 transitions, 5423 flow [2024-06-14 13:15:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:15:55,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:15:55,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-14 13:15:55,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39323467230443976 [2024-06-14 13:15:55,497 INFO L175 Difference]: Start difference. First operand has 312 places, 377 transitions, 4119 flow. Second operand 11 states and 186 transitions. [2024-06-14 13:15:55,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 430 transitions, 5423 flow [2024-06-14 13:15:56,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 430 transitions, 5268 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-14 13:15:56,317 INFO L231 Difference]: Finished difference. Result has 319 places, 389 transitions, 4334 flow [2024-06-14 13:15:56,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3970, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4334, PETRI_PLACES=319, PETRI_TRANSITIONS=389} [2024-06-14 13:15:56,317 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 275 predicate places. [2024-06-14 13:15:56,317 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 389 transitions, 4334 flow [2024-06-14 13:15:56,317 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) [2024-06-14 13:15:56,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:56,318 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] [2024-06-14 13:15:56,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:15:56,318 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:56,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:56,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1372095547, now seen corresponding path program 2 times [2024-06-14 13:15:56,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:56,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052055255] [2024-06-14 13:15:56,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:56,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:00,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:00,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052055255] [2024-06-14 13:16:00,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052055255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:00,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:00,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:00,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305734052] [2024-06-14 13:16:00,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:00,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:00,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:00,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:00,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:00,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:00,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 389 transitions, 4334 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) [2024-06-14 13:16:00,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:00,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:00,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:02,438 INFO L124 PetriNetUnfolderBase]: 2787/4611 cut-off events. [2024-06-14 13:16:02,438 INFO L125 PetriNetUnfolderBase]: For 318728/318734 co-relation queries the response was YES. [2024-06-14 13:16:02,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30891 conditions, 4611 events. 2787/4611 cut-off events. For 318728/318734 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 28551 event pairs, 583 based on Foata normal form. 7/4615 useless extension candidates. Maximal degree in co-relation 30750. Up to 4200 conditions per place. [2024-06-14 13:16:02,499 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 357 selfloop transitions, 64 changer transitions 0/426 dead transitions. [2024-06-14 13:16:02,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 426 transitions, 5318 flow [2024-06-14 13:16:02,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:16:02,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:16:02,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 13:16:02,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 13:16:02,501 INFO L175 Difference]: Start difference. First operand has 319 places, 389 transitions, 4334 flow. Second operand 9 states and 156 transitions. [2024-06-14 13:16:02,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 426 transitions, 5318 flow [2024-06-14 13:16:03,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 426 transitions, 5162 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 13:16:03,401 INFO L231 Difference]: Finished difference. Result has 322 places, 392 transitions, 4361 flow [2024-06-14 13:16:03,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4178, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4361, PETRI_PLACES=322, PETRI_TRANSITIONS=392} [2024-06-14 13:16:03,401 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-14 13:16:03,401 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 392 transitions, 4361 flow [2024-06-14 13:16:03,401 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) [2024-06-14 13:16:03,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:03,402 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] [2024-06-14 13:16:03,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:16:03,402 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:03,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:03,402 INFO L85 PathProgramCache]: Analyzing trace with hash 689349735, now seen corresponding path program 2 times [2024-06-14 13:16:03,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:03,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394077681] [2024-06-14 13:16:03,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:03,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:07,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:07,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394077681] [2024-06-14 13:16:07,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394077681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:07,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:07,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:07,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816870837] [2024-06-14 13:16:07,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:07,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:07,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:07,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:07,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:07,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:07,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 392 transitions, 4361 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) [2024-06-14 13:16:07,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:07,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:07,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:09,531 INFO L124 PetriNetUnfolderBase]: 2823/4653 cut-off events. [2024-06-14 13:16:09,531 INFO L125 PetriNetUnfolderBase]: For 335568/335574 co-relation queries the response was YES. [2024-06-14 13:16:09,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31533 conditions, 4653 events. 2823/4653 cut-off events. For 335568/335574 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 28736 event pairs, 567 based on Foata normal form. 8/4658 useless extension candidates. Maximal degree in co-relation 31390. Up to 4161 conditions per place. [2024-06-14 13:16:09,582 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 353 selfloop transitions, 93 changer transitions 0/451 dead transitions. [2024-06-14 13:16:09,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 451 transitions, 5875 flow [2024-06-14 13:16:09,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:16:09,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:16:09,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 225 transitions. [2024-06-14 13:16:09,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37375415282392027 [2024-06-14 13:16:09,584 INFO L175 Difference]: Start difference. First operand has 322 places, 392 transitions, 4361 flow. Second operand 14 states and 225 transitions. [2024-06-14 13:16:09,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 451 transitions, 5875 flow [2024-06-14 13:16:10,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 451 transitions, 5690 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 13:16:10,534 INFO L231 Difference]: Finished difference. Result has 329 places, 404 transitions, 4568 flow [2024-06-14 13:16:10,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4192, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4568, PETRI_PLACES=329, PETRI_TRANSITIONS=404} [2024-06-14 13:16:10,534 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-14 13:16:10,535 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 404 transitions, 4568 flow [2024-06-14 13:16:10,535 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) [2024-06-14 13:16:10,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:10,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:10,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:16:10,535 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:10,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:10,536 INFO L85 PathProgramCache]: Analyzing trace with hash -342846481, now seen corresponding path program 3 times [2024-06-14 13:16:10,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:10,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588255292] [2024-06-14 13:16:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:10,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:14,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:14,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588255292] [2024-06-14 13:16:14,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588255292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:14,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:14,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:14,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48474349] [2024-06-14 13:16:14,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:14,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:14,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:14,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:14,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:14,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:14,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 404 transitions, 4568 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) [2024-06-14 13:16:14,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:14,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:14,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:16,893 INFO L124 PetriNetUnfolderBase]: 2817/4653 cut-off events. [2024-06-14 13:16:16,893 INFO L125 PetriNetUnfolderBase]: For 336934/336940 co-relation queries the response was YES. [2024-06-14 13:16:16,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31508 conditions, 4653 events. 2817/4653 cut-off events. For 336934/336940 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 28796 event pairs, 565 based on Foata normal form. 8/4658 useless extension candidates. Maximal degree in co-relation 31364. Up to 4156 conditions per place. [2024-06-14 13:16:16,951 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 355 selfloop transitions, 91 changer transitions 0/451 dead transitions. [2024-06-14 13:16:16,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 451 transitions, 5746 flow [2024-06-14 13:16:16,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:16:16,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:16:16,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 227 transitions. [2024-06-14 13:16:16,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3770764119601329 [2024-06-14 13:16:16,953 INFO L175 Difference]: Start difference. First operand has 329 places, 404 transitions, 4568 flow. Second operand 14 states and 227 transitions. [2024-06-14 13:16:16,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 451 transitions, 5746 flow [2024-06-14 13:16:17,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 451 transitions, 5534 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-14 13:16:17,939 INFO L231 Difference]: Finished difference. Result has 334 places, 404 transitions, 4545 flow [2024-06-14 13:16:17,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4356, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4545, PETRI_PLACES=334, PETRI_TRANSITIONS=404} [2024-06-14 13:16:17,940 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-14 13:16:17,940 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 404 transitions, 4545 flow [2024-06-14 13:16:17,940 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) [2024-06-14 13:16:17,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:17,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:17,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:16:17,940 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:17,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:17,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1139833995, now seen corresponding path program 3 times [2024-06-14 13:16:17,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:17,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580650168] [2024-06-14 13:16:17,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:17,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:21,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:21,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580650168] [2024-06-14 13:16:21,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580650168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:21,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:21,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:21,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526293254] [2024-06-14 13:16:21,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:21,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:21,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:21,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:21,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:21,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:21,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 404 transitions, 4545 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) [2024-06-14 13:16:21,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:21,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:21,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:24,383 INFO L124 PetriNetUnfolderBase]: 2822/4654 cut-off events. [2024-06-14 13:16:24,383 INFO L125 PetriNetUnfolderBase]: For 341030/341036 co-relation queries the response was YES. [2024-06-14 13:16:24,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31577 conditions, 4654 events. 2822/4654 cut-off events. For 341030/341036 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 28743 event pairs, 578 based on Foata normal form. 7/4658 useless extension candidates. Maximal degree in co-relation 31432. Up to 4242 conditions per place. [2024-06-14 13:16:24,436 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 365 selfloop transitions, 74 changer transitions 0/444 dead transitions. [2024-06-14 13:16:24,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 444 transitions, 5577 flow [2024-06-14 13:16:24,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:16:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:16:24,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-14 13:16:24,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:16:24,437 INFO L175 Difference]: Start difference. First operand has 334 places, 404 transitions, 4545 flow. Second operand 12 states and 192 transitions. [2024-06-14 13:16:24,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 444 transitions, 5577 flow [2024-06-14 13:16:25,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 444 transitions, 5369 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-14 13:16:25,494 INFO L231 Difference]: Finished difference. Result has 333 places, 407 transitions, 4546 flow [2024-06-14 13:16:25,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4337, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4546, PETRI_PLACES=333, PETRI_TRANSITIONS=407} [2024-06-14 13:16:25,495 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-14 13:16:25,495 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 407 transitions, 4546 flow [2024-06-14 13:16:25,495 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) [2024-06-14 13:16:25,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:25,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:25,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:16:25,496 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:25,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:25,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1535911791, now seen corresponding path program 3 times [2024-06-14 13:16:25,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:25,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343307380] [2024-06-14 13:16:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:25,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:29,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:29,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343307380] [2024-06-14 13:16:29,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343307380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:29,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:29,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:29,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183496624] [2024-06-14 13:16:29,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:29,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:29,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:29,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:29,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:29,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:29,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 407 transitions, 4546 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) [2024-06-14 13:16:29,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:29,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:29,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:31,563 INFO L124 PetriNetUnfolderBase]: 2858/4711 cut-off events. [2024-06-14 13:16:31,564 INFO L125 PetriNetUnfolderBase]: For 373230/373232 co-relation queries the response was YES. [2024-06-14 13:16:31,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31945 conditions, 4711 events. 2858/4711 cut-off events. For 373230/373232 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 29106 event pairs, 569 based on Foata normal form. 8/4716 useless extension candidates. Maximal degree in co-relation 31799. Up to 4230 conditions per place. [2024-06-14 13:16:31,624 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 380 selfloop transitions, 61 changer transitions 0/446 dead transitions. [2024-06-14 13:16:31,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 446 transitions, 5607 flow [2024-06-14 13:16:31,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:16:31,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:16:31,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-14 13:16:31,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3701550387596899 [2024-06-14 13:16:31,625 INFO L175 Difference]: Start difference. First operand has 333 places, 407 transitions, 4546 flow. Second operand 12 states and 191 transitions. [2024-06-14 13:16:31,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 446 transitions, 5607 flow [2024-06-14 13:16:32,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 446 transitions, 5379 flow, removed 20 selfloop flow, removed 12 redundant places. [2024-06-14 13:16:32,745 INFO L231 Difference]: Finished difference. Result has 334 places, 410 transitions, 4504 flow [2024-06-14 13:16:32,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4318, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4504, PETRI_PLACES=334, PETRI_TRANSITIONS=410} [2024-06-14 13:16:32,745 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-14 13:16:32,745 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 410 transitions, 4504 flow [2024-06-14 13:16:32,746 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) [2024-06-14 13:16:32,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:32,746 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] [2024-06-14 13:16:32,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:16:32,746 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:32,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:32,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1278962925, now seen corresponding path program 4 times [2024-06-14 13:16:32,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:32,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589256419] [2024-06-14 13:16:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:32,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:36,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:36,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589256419] [2024-06-14 13:16:36,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589256419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:36,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:36,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:36,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257861183] [2024-06-14 13:16:36,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:36,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:36,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:36,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:36,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:36,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:36,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 410 transitions, 4504 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) [2024-06-14 13:16:36,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:36,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:36,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:38,834 INFO L124 PetriNetUnfolderBase]: 2879/4742 cut-off events. [2024-06-14 13:16:38,834 INFO L125 PetriNetUnfolderBase]: For 366338/366340 co-relation queries the response was YES. [2024-06-14 13:16:38,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32508 conditions, 4742 events. 2879/4742 cut-off events. For 366338/366340 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 29358 event pairs, 614 based on Foata normal form. 1/4737 useless extension candidates. Maximal degree in co-relation 32361. Up to 4007 conditions per place. [2024-06-14 13:16:38,891 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 291 selfloop transitions, 162 changer transitions 0/458 dead transitions. [2024-06-14 13:16:38,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 458 transitions, 6278 flow [2024-06-14 13:16:38,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:16:38,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:16:38,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 13:16:38,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 13:16:38,892 INFO L175 Difference]: Start difference. First operand has 334 places, 410 transitions, 4504 flow. Second operand 9 states and 167 transitions. [2024-06-14 13:16:38,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 458 transitions, 6278 flow [2024-06-14 13:16:40,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 458 transitions, 6145 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 13:16:40,045 INFO L231 Difference]: Finished difference. Result has 336 places, 422 transitions, 4979 flow [2024-06-14 13:16:40,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4371, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4979, PETRI_PLACES=336, PETRI_TRANSITIONS=422} [2024-06-14 13:16:40,045 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-14 13:16:40,045 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 422 transitions, 4979 flow [2024-06-14 13:16:40,045 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) [2024-06-14 13:16:40,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:40,045 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] [2024-06-14 13:16:40,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:16:40,045 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:40,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:40,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2087495633, now seen corresponding path program 5 times [2024-06-14 13:16:40,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:40,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651322138] [2024-06-14 13:16:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:40,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:43,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:43,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651322138] [2024-06-14 13:16:43,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651322138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:43,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:43,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:43,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390888549] [2024-06-14 13:16:43,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:43,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:43,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:43,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:43,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:43,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:43,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 422 transitions, 4979 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) [2024-06-14 13:16:43,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:43,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:43,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:45,874 INFO L124 PetriNetUnfolderBase]: 2892/4760 cut-off events. [2024-06-14 13:16:45,875 INFO L125 PetriNetUnfolderBase]: For 381239/381241 co-relation queries the response was YES. [2024-06-14 13:16:45,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33429 conditions, 4760 events. 2892/4760 cut-off events. For 381239/381241 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 29467 event pairs, 610 based on Foata normal form. 1/4755 useless extension candidates. Maximal degree in co-relation 33281. Up to 4022 conditions per place. [2024-06-14 13:16:45,936 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 288 selfloop transitions, 167 changer transitions 0/460 dead transitions. [2024-06-14 13:16:45,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 460 transitions, 6627 flow [2024-06-14 13:16:45,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:16:45,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:16:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:16:45,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 13:16:45,938 INFO L175 Difference]: Start difference. First operand has 336 places, 422 transitions, 4979 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:16:45,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 460 transitions, 6627 flow [2024-06-14 13:16:47,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 460 transitions, 6383 flow, removed 87 selfloop flow, removed 3 redundant places. [2024-06-14 13:16:47,214 INFO L231 Difference]: Finished difference. Result has 342 places, 428 transitions, 5223 flow [2024-06-14 13:16:47,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4787, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5223, PETRI_PLACES=342, PETRI_TRANSITIONS=428} [2024-06-14 13:16:47,214 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-14 13:16:47,214 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 428 transitions, 5223 flow [2024-06-14 13:16:47,214 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) [2024-06-14 13:16:47,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:47,214 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] [2024-06-14 13:16:47,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:16:47,215 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:47,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:47,215 INFO L85 PathProgramCache]: Analyzing trace with hash -203418835, now seen corresponding path program 1 times [2024-06-14 13:16:47,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:47,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169679618] [2024-06-14 13:16:47,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:47,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:50,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:50,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169679618] [2024-06-14 13:16:50,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169679618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:50,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:50,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:50,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647346646] [2024-06-14 13:16:50,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:50,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:50,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:50,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:50,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:50,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:50,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 428 transitions, 5223 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) [2024-06-14 13:16:50,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:50,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:50,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:52,905 INFO L124 PetriNetUnfolderBase]: 2934/4821 cut-off events. [2024-06-14 13:16:52,905 INFO L125 PetriNetUnfolderBase]: For 408283/408289 co-relation queries the response was YES. [2024-06-14 13:16:52,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34556 conditions, 4821 events. 2934/4821 cut-off events. For 408283/408289 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 29827 event pairs, 603 based on Foata normal form. 8/4823 useless extension candidates. Maximal degree in co-relation 34406. Up to 4228 conditions per place. [2024-06-14 13:16:52,969 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 341 selfloop transitions, 131 changer transitions 0/477 dead transitions. [2024-06-14 13:16:52,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 477 transitions, 6779 flow [2024-06-14 13:16:52,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:16:52,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:16:52,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-14 13:16:52,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 13:16:52,971 INFO L175 Difference]: Start difference. First operand has 342 places, 428 transitions, 5223 flow. Second operand 12 states and 200 transitions. [2024-06-14 13:16:52,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 477 transitions, 6779 flow [2024-06-14 13:16:54,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 477 transitions, 6475 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 13:16:54,244 INFO L231 Difference]: Finished difference. Result has 349 places, 437 transitions, 5355 flow [2024-06-14 13:16:54,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4919, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5355, PETRI_PLACES=349, PETRI_TRANSITIONS=437} [2024-06-14 13:16:54,245 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-14 13:16:54,245 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 437 transitions, 5355 flow [2024-06-14 13:16:54,245 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) [2024-06-14 13:16:54,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:54,247 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, 1, 1] [2024-06-14 13:16:54,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:16:54,247 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:54,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:54,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2093156543, now seen corresponding path program 6 times [2024-06-14 13:16:54,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:54,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508549961] [2024-06-14 13:16:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:54,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:57,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:57,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508549961] [2024-06-14 13:16:57,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508549961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:57,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:57,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:57,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464419318] [2024-06-14 13:16:57,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:57,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:57,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:57,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:57,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:57,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:57,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 437 transitions, 5355 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) [2024-06-14 13:16:57,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:57,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:57,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:00,146 INFO L124 PetriNetUnfolderBase]: 2931/4814 cut-off events. [2024-06-14 13:17:00,146 INFO L125 PetriNetUnfolderBase]: For 411760/411762 co-relation queries the response was YES. [2024-06-14 13:17:00,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34789 conditions, 4814 events. 2931/4814 cut-off events. For 411760/411762 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 29742 event pairs, 613 based on Foata normal form. 1/4809 useless extension candidates. Maximal degree in co-relation 34638. Up to 4077 conditions per place. [2024-06-14 13:17:00,210 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 309 selfloop transitions, 160 changer transitions 0/474 dead transitions. [2024-06-14 13:17:00,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 474 transitions, 7081 flow [2024-06-14 13:17:00,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:17:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:17:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 13:17:00,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 13:17:00,212 INFO L175 Difference]: Start difference. First operand has 349 places, 437 transitions, 5355 flow. Second operand 9 states and 169 transitions. [2024-06-14 13:17:00,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 474 transitions, 7081 flow [2024-06-14 13:17:01,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 474 transitions, 6816 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-14 13:17:01,601 INFO L231 Difference]: Finished difference. Result has 351 places, 437 transitions, 5416 flow [2024-06-14 13:17:01,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5090, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5416, PETRI_PLACES=351, PETRI_TRANSITIONS=437} [2024-06-14 13:17:01,601 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-14 13:17:01,602 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 437 transitions, 5416 flow [2024-06-14 13:17:01,602 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) [2024-06-14 13:17:01,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:01,602 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] [2024-06-14 13:17:01,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:17:01,602 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)] === [2024-06-14 13:17:01,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:01,603 INFO L85 PathProgramCache]: Analyzing trace with hash -208960147, now seen corresponding path program 7 times [2024-06-14 13:17:01,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:01,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143363023] [2024-06-14 13:17:01,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:01,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:05,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:05,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143363023] [2024-06-14 13:17:05,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143363023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:05,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:05,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:05,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145201447] [2024-06-14 13:17:05,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:05,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:05,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:05,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:05,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:05,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:05,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 437 transitions, 5416 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) [2024-06-14 13:17:05,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:05,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:05,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:07,857 INFO L124 PetriNetUnfolderBase]: 2941/4833 cut-off events. [2024-06-14 13:17:07,857 INFO L125 PetriNetUnfolderBase]: For 420599/420604 co-relation queries the response was YES. [2024-06-14 13:17:07,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35157 conditions, 4833 events. 2941/4833 cut-off events. For 420599/420604 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29934 event pairs, 607 based on Foata normal form. 3/4832 useless extension candidates. Maximal degree in co-relation 35004. Up to 4314 conditions per place. [2024-06-14 13:17:07,923 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 365 selfloop transitions, 102 changer transitions 0/472 dead transitions. [2024-06-14 13:17:07,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 472 transitions, 6524 flow [2024-06-14 13:17:07,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:17:07,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:17:07,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 13:17:07,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 13:17:07,925 INFO L175 Difference]: Start difference. First operand has 351 places, 437 transitions, 5416 flow. Second operand 9 states and 156 transitions. [2024-06-14 13:17:07,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 472 transitions, 6524 flow [2024-06-14 13:17:09,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 472 transitions, 6104 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 13:17:09,291 INFO L231 Difference]: Finished difference. Result has 352 places, 443 transitions, 5306 flow [2024-06-14 13:17:09,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5020, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5306, PETRI_PLACES=352, PETRI_TRANSITIONS=443} [2024-06-14 13:17:09,292 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-14 13:17:09,292 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 443 transitions, 5306 flow [2024-06-14 13:17:09,292 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) [2024-06-14 13:17:09,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:09,292 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] [2024-06-14 13:17:09,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:17:09,292 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:09,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:09,293 INFO L85 PathProgramCache]: Analyzing trace with hash -2093036387, now seen corresponding path program 4 times [2024-06-14 13:17:09,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:09,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714005059] [2024-06-14 13:17:09,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:09,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:12,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:12,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714005059] [2024-06-14 13:17:12,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714005059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:12,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:12,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:12,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699365988] [2024-06-14 13:17:12,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:12,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:12,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:12,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:12,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:12,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:12,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 443 transitions, 5306 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) [2024-06-14 13:17:12,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:12,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:12,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:15,268 INFO L124 PetriNetUnfolderBase]: 2983/4899 cut-off events. [2024-06-14 13:17:15,269 INFO L125 PetriNetUnfolderBase]: For 449446/449451 co-relation queries the response was YES. [2024-06-14 13:17:15,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35911 conditions, 4899 events. 2983/4899 cut-off events. For 449446/449451 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 30410 event pairs, 595 based on Foata normal form. 4/4899 useless extension candidates. Maximal degree in co-relation 35757. Up to 4178 conditions per place. [2024-06-14 13:17:15,325 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 332 selfloop transitions, 154 changer transitions 0/491 dead transitions. [2024-06-14 13:17:15,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 491 transitions, 7110 flow [2024-06-14 13:17:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:17:15,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:17:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 202 transitions. [2024-06-14 13:17:15,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39147286821705424 [2024-06-14 13:17:15,326 INFO L175 Difference]: Start difference. First operand has 352 places, 443 transitions, 5306 flow. Second operand 12 states and 202 transitions. [2024-06-14 13:17:15,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 491 transitions, 7110 flow [2024-06-14 13:17:16,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 491 transitions, 6878 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:17:16,746 INFO L231 Difference]: Finished difference. Result has 358 places, 452 transitions, 5598 flow [2024-06-14 13:17:16,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5074, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5598, PETRI_PLACES=358, PETRI_TRANSITIONS=452} [2024-06-14 13:17:16,746 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 314 predicate places. [2024-06-14 13:17:16,746 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 452 transitions, 5598 flow [2024-06-14 13:17:16,747 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) [2024-06-14 13:17:16,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:16,747 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] [2024-06-14 13:17:16,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:17:16,747 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:16,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:16,747 INFO L85 PathProgramCache]: Analyzing trace with hash -2083776563, now seen corresponding path program 8 times [2024-06-14 13:17:16,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:16,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583843510] [2024-06-14 13:17:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:16,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:20,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:20,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583843510] [2024-06-14 13:17:20,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583843510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:20,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:20,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:20,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873288521] [2024-06-14 13:17:20,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:20,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:20,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:20,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:20,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:20,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:20,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 452 transitions, 5598 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) [2024-06-14 13:17:20,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:20,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:20,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:22,451 INFO L124 PetriNetUnfolderBase]: 3001/4926 cut-off events. [2024-06-14 13:17:22,451 INFO L125 PetriNetUnfolderBase]: For 462566/462571 co-relation queries the response was YES. [2024-06-14 13:17:22,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36786 conditions, 4926 events. 3001/4926 cut-off events. For 462566/462571 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 30586 event pairs, 609 based on Foata normal form. 3/4925 useless extension candidates. Maximal degree in co-relation 36631. Up to 4381 conditions per place. [2024-06-14 13:17:22,513 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 367 selfloop transitions, 115 changer transitions 0/487 dead transitions. [2024-06-14 13:17:22,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 487 transitions, 6937 flow [2024-06-14 13:17:22,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:17:22,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:17:22,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:17:22,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-14 13:17:22,515 INFO L175 Difference]: Start difference. First operand has 358 places, 452 transitions, 5598 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:17:22,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 487 transitions, 6937 flow [2024-06-14 13:17:24,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 487 transitions, 6678 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-14 13:17:24,050 INFO L231 Difference]: Finished difference. Result has 362 places, 461 transitions, 5731 flow [2024-06-14 13:17:24,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5342, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5731, PETRI_PLACES=362, PETRI_TRANSITIONS=461} [2024-06-14 13:17:24,050 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-14 13:17:24,050 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 461 transitions, 5731 flow [2024-06-14 13:17:24,050 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) [2024-06-14 13:17:24,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:24,050 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] [2024-06-14 13:17:24,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:17:24,050 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:24,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:24,051 INFO L85 PathProgramCache]: Analyzing trace with hash 899459979, now seen corresponding path program 2 times [2024-06-14 13:17:24,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:24,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105253206] [2024-06-14 13:17:24,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:24,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:27,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:27,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105253206] [2024-06-14 13:17:27,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105253206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:27,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:27,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:27,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648738204] [2024-06-14 13:17:27,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:27,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:27,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:27,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:27,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:27,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:27,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 461 transitions, 5731 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) [2024-06-14 13:17:27,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:27,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:27,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:29,849 INFO L124 PetriNetUnfolderBase]: 3027/4971 cut-off events. [2024-06-14 13:17:29,849 INFO L125 PetriNetUnfolderBase]: For 482360/482369 co-relation queries the response was YES. [2024-06-14 13:17:29,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37250 conditions, 4971 events. 3027/4971 cut-off events. For 482360/482369 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 30957 event pairs, 597 based on Foata normal form. 10/4977 useless extension candidates. Maximal degree in co-relation 37092. Up to 4500 conditions per place. [2024-06-14 13:17:29,920 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 410 selfloop transitions, 88 changer transitions 0/503 dead transitions. [2024-06-14 13:17:29,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 503 transitions, 7061 flow [2024-06-14 13:17:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:17:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:17:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 193 transitions. [2024-06-14 13:17:29,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.374031007751938 [2024-06-14 13:17:29,922 INFO L175 Difference]: Start difference. First operand has 362 places, 461 transitions, 5731 flow. Second operand 12 states and 193 transitions. [2024-06-14 13:17:29,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 503 transitions, 7061 flow [2024-06-14 13:17:31,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 503 transitions, 6868 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 13:17:31,721 INFO L231 Difference]: Finished difference. Result has 370 places, 467 transitions, 5782 flow [2024-06-14 13:17:31,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5538, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5782, PETRI_PLACES=370, PETRI_TRANSITIONS=467} [2024-06-14 13:17:31,722 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 326 predicate places. [2024-06-14 13:17:31,722 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 467 transitions, 5782 flow [2024-06-14 13:17:31,722 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) [2024-06-14 13:17:31,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:31,722 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] [2024-06-14 13:17:31,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:17:31,723 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:31,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:31,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1566756821, now seen corresponding path program 9 times [2024-06-14 13:17:31,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:31,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665503555] [2024-06-14 13:17:31,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:31,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:35,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:35,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665503555] [2024-06-14 13:17:35,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665503555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:35,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:35,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:35,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92642562] [2024-06-14 13:17:35,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:35,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:35,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:35,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:35,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:35,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:35,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 467 transitions, 5782 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) [2024-06-14 13:17:35,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:35,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:35,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:37,568 INFO L124 PetriNetUnfolderBase]: 3024/4974 cut-off events. [2024-06-14 13:17:37,568 INFO L125 PetriNetUnfolderBase]: For 479585/479590 co-relation queries the response was YES. [2024-06-14 13:17:37,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36837 conditions, 4974 events. 3024/4974 cut-off events. For 479585/479590 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 30976 event pairs, 620 based on Foata normal form. 3/4973 useless extension candidates. Maximal degree in co-relation 36678. Up to 4414 conditions per place. [2024-06-14 13:17:37,639 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 373 selfloop transitions, 116 changer transitions 0/494 dead transitions. [2024-06-14 13:17:37,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 494 transitions, 6832 flow [2024-06-14 13:17:37,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:17:37,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:17:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-14 13:17:37,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37420718816067655 [2024-06-14 13:17:37,640 INFO L175 Difference]: Start difference. First operand has 370 places, 467 transitions, 5782 flow. Second operand 11 states and 177 transitions. [2024-06-14 13:17:37,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 494 transitions, 6832 flow [2024-06-14 13:17:39,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 494 transitions, 6688 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-14 13:17:39,526 INFO L231 Difference]: Finished difference. Result has 373 places, 467 transitions, 5876 flow [2024-06-14 13:17:39,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5638, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5876, PETRI_PLACES=373, PETRI_TRANSITIONS=467} [2024-06-14 13:17:39,526 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-14 13:17:39,526 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 467 transitions, 5876 flow [2024-06-14 13:17:39,526 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) [2024-06-14 13:17:39,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:39,527 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] [2024-06-14 13:17:39,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:17:39,527 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:39,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:39,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1282975131, now seen corresponding path program 5 times [2024-06-14 13:17:39,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:39,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395507061] [2024-06-14 13:17:39,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:39,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:43,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:43,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395507061] [2024-06-14 13:17:43,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395507061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:43,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:43,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:43,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654988860] [2024-06-14 13:17:43,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:43,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:43,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:43,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:43,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:43,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:43,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 467 transitions, 5876 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) [2024-06-14 13:17:43,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:43,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:43,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:45,759 INFO L124 PetriNetUnfolderBase]: 3050/5006 cut-off events. [2024-06-14 13:17:45,759 INFO L125 PetriNetUnfolderBase]: For 502852/502857 co-relation queries the response was YES. [2024-06-14 13:17:45,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37542 conditions, 5006 events. 3050/5006 cut-off events. For 502852/502857 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 31234 event pairs, 597 based on Foata normal form. 4/5006 useless extension candidates. Maximal degree in co-relation 37381. Up to 4257 conditions per place. [2024-06-14 13:17:45,835 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 347 selfloop transitions, 158 changer transitions 0/510 dead transitions. [2024-06-14 13:17:45,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 510 transitions, 7602 flow [2024-06-14 13:17:45,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:17:45,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:17:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 212 transitions. [2024-06-14 13:17:45,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37924865831842575 [2024-06-14 13:17:45,837 INFO L175 Difference]: Start difference. First operand has 373 places, 467 transitions, 5876 flow. Second operand 13 states and 212 transitions. [2024-06-14 13:17:45,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 510 transitions, 7602 flow [2024-06-14 13:17:47,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 510 transitions, 7338 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 13:17:47,462 INFO L231 Difference]: Finished difference. Result has 376 places, 473 transitions, 6006 flow [2024-06-14 13:17:47,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5612, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6006, PETRI_PLACES=376, PETRI_TRANSITIONS=473} [2024-06-14 13:17:47,463 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-14 13:17:47,463 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 473 transitions, 6006 flow [2024-06-14 13:17:47,463 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) [2024-06-14 13:17:47,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:47,464 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] [2024-06-14 13:17:47,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:17:47,464 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:47,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:47,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1566768167, now seen corresponding path program 6 times [2024-06-14 13:17:47,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:47,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209774825] [2024-06-14 13:17:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:47,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:51,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:51,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209774825] [2024-06-14 13:17:51,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209774825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:51,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:51,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:51,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641383078] [2024-06-14 13:17:51,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:51,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:51,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:51,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:51,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:51,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:51,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 473 transitions, 6006 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) [2024-06-14 13:17:51,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:51,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:51,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:53,278 INFO L124 PetriNetUnfolderBase]: 3044/4992 cut-off events. [2024-06-14 13:17:53,278 INFO L125 PetriNetUnfolderBase]: For 504891/504896 co-relation queries the response was YES. [2024-06-14 13:17:53,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37575 conditions, 4992 events. 3044/4992 cut-off events. For 504891/504896 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 31070 event pairs, 598 based on Foata normal form. 4/4992 useless extension candidates. Maximal degree in co-relation 37413. Up to 4252 conditions per place. [2024-06-14 13:17:53,337 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 344 selfloop transitions, 157 changer transitions 0/506 dead transitions. [2024-06-14 13:17:53,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 506 transitions, 7464 flow [2024-06-14 13:17:53,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:17:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:17:53,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-14 13:17:53,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39323467230443976 [2024-06-14 13:17:53,339 INFO L175 Difference]: Start difference. First operand has 376 places, 473 transitions, 6006 flow. Second operand 11 states and 186 transitions. [2024-06-14 13:17:53,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 506 transitions, 7464 flow [2024-06-14 13:17:54,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 506 transitions, 7140 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-14 13:17:54,987 INFO L231 Difference]: Finished difference. Result has 378 places, 473 transitions, 6002 flow [2024-06-14 13:17:54,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5682, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6002, PETRI_PLACES=378, PETRI_TRANSITIONS=473} [2024-06-14 13:17:54,987 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-14 13:17:54,988 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 473 transitions, 6002 flow [2024-06-14 13:17:54,988 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) [2024-06-14 13:17:54,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:54,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:54,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:17:54,988 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:54,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:54,988 INFO L85 PathProgramCache]: Analyzing trace with hash -199694185, now seen corresponding path program 3 times [2024-06-14 13:17:54,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:54,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563272453] [2024-06-14 13:17:54,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:54,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:58,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:58,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563272453] [2024-06-14 13:17:58,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563272453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:58,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:58,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:58,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684792391] [2024-06-14 13:17:58,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:58,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:58,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:58,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:58,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:58,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:58,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 473 transitions, 6002 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) [2024-06-14 13:17:58,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:58,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:58,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:01,018 INFO L124 PetriNetUnfolderBase]: 3038/4987 cut-off events. [2024-06-14 13:18:01,018 INFO L125 PetriNetUnfolderBase]: For 505434/505443 co-relation queries the response was YES. [2024-06-14 13:18:01,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37417 conditions, 4987 events. 3038/4987 cut-off events. For 505434/505443 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 31034 event pairs, 599 based on Foata normal form. 10/4993 useless extension candidates. Maximal degree in co-relation 37254. Up to 4519 conditions per place. [2024-06-14 13:18:01,087 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 416 selfloop transitions, 88 changer transitions 0/509 dead transitions. [2024-06-14 13:18:01,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 509 transitions, 7108 flow [2024-06-14 13:18:01,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:18:01,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:18:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 203 transitions. [2024-06-14 13:18:01,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3631484794275492 [2024-06-14 13:18:01,088 INFO L175 Difference]: Start difference. First operand has 378 places, 473 transitions, 6002 flow. Second operand 13 states and 203 transitions. [2024-06-14 13:18:01,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 509 transitions, 7108 flow [2024-06-14 13:18:03,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 509 transitions, 6778 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-14 13:18:03,177 INFO L231 Difference]: Finished difference. Result has 381 places, 473 transitions, 5854 flow [2024-06-14 13:18:03,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5672, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5854, PETRI_PLACES=381, PETRI_TRANSITIONS=473} [2024-06-14 13:18:03,178 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-14 13:18:03,178 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 473 transitions, 5854 flow [2024-06-14 13:18:03,178 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) [2024-06-14 13:18:03,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:03,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:03,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:18:03,179 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:03,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:03,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1535582385, now seen corresponding path program 7 times [2024-06-14 13:18:03,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:03,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583789828] [2024-06-14 13:18:03,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:03,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:07,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:07,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583789828] [2024-06-14 13:18:07,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583789828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:07,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:07,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:07,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98871879] [2024-06-14 13:18:07,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:07,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:07,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:07,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:07,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:07,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:07,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 473 transitions, 5854 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) [2024-06-14 13:18:07,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:07,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:07,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:09,789 INFO L124 PetriNetUnfolderBase]: 3095/5068 cut-off events. [2024-06-14 13:18:09,789 INFO L125 PetriNetUnfolderBase]: For 533197/533199 co-relation queries the response was YES. [2024-06-14 13:18:09,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38201 conditions, 5068 events. 3095/5068 cut-off events. For 533197/533199 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 31513 event pairs, 591 based on Foata normal form. 2/5067 useless extension candidates. Maximal degree in co-relation 38037. Up to 4601 conditions per place. [2024-06-14 13:18:09,853 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 443 selfloop transitions, 75 changer transitions 0/523 dead transitions. [2024-06-14 13:18:09,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 523 transitions, 7579 flow [2024-06-14 13:18:09,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:18:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:18:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 216 transitions. [2024-06-14 13:18:09,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588039867109635 [2024-06-14 13:18:09,855 INFO L175 Difference]: Start difference. First operand has 381 places, 473 transitions, 5854 flow. Second operand 14 states and 216 transitions. [2024-06-14 13:18:09,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 523 transitions, 7579 flow [2024-06-14 13:18:11,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 523 transitions, 7399 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-14 13:18:11,406 INFO L231 Difference]: Finished difference. Result has 384 places, 488 transitions, 6079 flow [2024-06-14 13:18:11,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5674, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6079, PETRI_PLACES=384, PETRI_TRANSITIONS=488} [2024-06-14 13:18:11,406 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-14 13:18:11,406 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 488 transitions, 6079 flow [2024-06-14 13:18:11,406 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) [2024-06-14 13:18:11,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:11,406 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] [2024-06-14 13:18:11,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:18:11,407 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:11,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:11,407 INFO L85 PathProgramCache]: Analyzing trace with hash -55959337, now seen corresponding path program 10 times [2024-06-14 13:18:11,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:11,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902105832] [2024-06-14 13:18:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:11,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:15,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:15,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902105832] [2024-06-14 13:18:15,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902105832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:15,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:15,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:15,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362619294] [2024-06-14 13:18:15,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:15,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:15,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:15,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:15,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:15,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:15,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 488 transitions, 6079 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) [2024-06-14 13:18:15,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:15,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:15,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:17,426 INFO L124 PetriNetUnfolderBase]: 3100/5085 cut-off events. [2024-06-14 13:18:17,426 INFO L125 PetriNetUnfolderBase]: For 539090/539092 co-relation queries the response was YES. [2024-06-14 13:18:17,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38419 conditions, 5085 events. 3100/5085 cut-off events. For 539090/539092 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 31768 event pairs, 614 based on Foata normal form. 1/5083 useless extension candidates. Maximal degree in co-relation 38253. Up to 4683 conditions per place. [2024-06-14 13:18:17,502 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 455 selfloop transitions, 52 changer transitions 0/512 dead transitions. [2024-06-14 13:18:17,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 512 transitions, 7209 flow [2024-06-14 13:18:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:18:17,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:18:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 13:18:17,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:18:17,504 INFO L175 Difference]: Start difference. First operand has 384 places, 488 transitions, 6079 flow. Second operand 9 states and 144 transitions. [2024-06-14 13:18:17,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 512 transitions, 7209 flow [2024-06-14 13:18:19,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 512 transitions, 7100 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 13:18:19,729 INFO L231 Difference]: Finished difference. Result has 385 places, 491 transitions, 6147 flow [2024-06-14 13:18:19,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5970, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6147, PETRI_PLACES=385, PETRI_TRANSITIONS=491} [2024-06-14 13:18:19,729 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-14 13:18:19,729 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 491 transitions, 6147 flow [2024-06-14 13:18:19,730 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) [2024-06-14 13:18:19,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:19,730 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] [2024-06-14 13:18:19,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:18:19,730 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:19,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:19,731 INFO L85 PathProgramCache]: Analyzing trace with hash 996415639, now seen corresponding path program 4 times [2024-06-14 13:18:19,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:19,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20033362] [2024-06-14 13:18:19,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:19,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:23,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:23,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20033362] [2024-06-14 13:18:23,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20033362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:23,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:23,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:23,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649626930] [2024-06-14 13:18:23,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:23,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:23,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:23,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:23,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:23,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:23,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 491 transitions, 6147 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) [2024-06-14 13:18:23,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:23,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:23,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:26,755 INFO L124 PetriNetUnfolderBase]: 3158/5171 cut-off events. [2024-06-14 13:18:26,755 INFO L125 PetriNetUnfolderBase]: For 583046/583055 co-relation queries the response was YES. [2024-06-14 13:18:26,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39614 conditions, 5171 events. 3158/5171 cut-off events. For 583046/583055 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 32340 event pairs, 605 based on Foata normal form. 10/5177 useless extension candidates. Maximal degree in co-relation 39446. Up to 4638 conditions per place. [2024-06-14 13:18:26,820 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 436 selfloop transitions, 102 changer transitions 0/543 dead transitions. [2024-06-14 13:18:26,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 543 transitions, 8045 flow [2024-06-14 13:18:26,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 13:18:26,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 13:18:26,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 232 transitions. [2024-06-14 13:18:26,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35968992248062015 [2024-06-14 13:18:26,822 INFO L175 Difference]: Start difference. First operand has 385 places, 491 transitions, 6147 flow. Second operand 15 states and 232 transitions. [2024-06-14 13:18:26,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 543 transitions, 8045 flow [2024-06-14 13:18:28,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 543 transitions, 7912 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 13:18:28,800 INFO L231 Difference]: Finished difference. Result has 395 places, 503 transitions, 6391 flow [2024-06-14 13:18:28,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6014, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6391, PETRI_PLACES=395, PETRI_TRANSITIONS=503} [2024-06-14 13:18:28,801 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-14 13:18:28,801 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 503 transitions, 6391 flow [2024-06-14 13:18:28,801 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) [2024-06-14 13:18:28,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:28,801 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] [2024-06-14 13:18:28,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:18:28,801 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:28,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:28,802 INFO L85 PathProgramCache]: Analyzing trace with hash -55803841, now seen corresponding path program 8 times [2024-06-14 13:18:28,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:28,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536562536] [2024-06-14 13:18:28,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:28,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:32,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:32,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536562536] [2024-06-14 13:18:32,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536562536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:32,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:32,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:32,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759998761] [2024-06-14 13:18:32,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:32,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:32,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:32,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:32,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:32,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:32,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 503 transitions, 6391 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) [2024-06-14 13:18:32,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:32,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:32,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:34,825 INFO L124 PetriNetUnfolderBase]: 3226/5281 cut-off events. [2024-06-14 13:18:34,825 INFO L125 PetriNetUnfolderBase]: For 624495/624500 co-relation queries the response was YES. [2024-06-14 13:18:34,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41133 conditions, 5281 events. 3226/5281 cut-off events. For 624495/624500 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 33194 event pairs, 617 based on Foata normal form. 4/5281 useless extension candidates. Maximal degree in co-relation 40963. Up to 4444 conditions per place. [2024-06-14 13:18:34,908 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 364 selfloop transitions, 185 changer transitions 0/554 dead transitions. [2024-06-14 13:18:34,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 554 transitions, 8582 flow [2024-06-14 13:18:34,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:18:34,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:18:34,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 199 transitions. [2024-06-14 13:18:34,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3856589147286822 [2024-06-14 13:18:34,910 INFO L175 Difference]: Start difference. First operand has 395 places, 503 transitions, 6391 flow. Second operand 12 states and 199 transitions. [2024-06-14 13:18:34,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 554 transitions, 8582 flow [2024-06-14 13:18:37,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 554 transitions, 8374 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-14 13:18:37,307 INFO L231 Difference]: Finished difference. Result has 397 places, 521 transitions, 6788 flow [2024-06-14 13:18:37,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6183, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6788, PETRI_PLACES=397, PETRI_TRANSITIONS=521} [2024-06-14 13:18:37,308 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-14 13:18:37,308 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 521 transitions, 6788 flow [2024-06-14 13:18:37,308 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) [2024-06-14 13:18:37,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:37,308 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, 1, 1] [2024-06-14 13:18:37,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:18:37,308 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:37,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:37,308 INFO L85 PathProgramCache]: Analyzing trace with hash 996410059, now seen corresponding path program 5 times [2024-06-14 13:18:37,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:37,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774619038] [2024-06-14 13:18:37,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:37,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:41,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:41,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774619038] [2024-06-14 13:18:41,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774619038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:41,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:41,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:41,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591125993] [2024-06-14 13:18:41,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:41,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:41,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:41,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:41,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:41,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:41,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 521 transitions, 6788 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) [2024-06-14 13:18:41,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:41,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:41,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:43,620 INFO L124 PetriNetUnfolderBase]: 3220/5267 cut-off events. [2024-06-14 13:18:43,620 INFO L125 PetriNetUnfolderBase]: For 627394/627403 co-relation queries the response was YES. [2024-06-14 13:18:43,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41256 conditions, 5267 events. 3220/5267 cut-off events. For 627394/627403 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 33060 event pairs, 609 based on Foata normal form. 10/5273 useless extension candidates. Maximal degree in co-relation 41085. Up to 4727 conditions per place. [2024-06-14 13:18:43,699 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 449 selfloop transitions, 102 changer transitions 0/556 dead transitions. [2024-06-14 13:18:43,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 556 transitions, 8378 flow [2024-06-14 13:18:43,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:18:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:18:43,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 205 transitions. [2024-06-14 13:18:43,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3667262969588551 [2024-06-14 13:18:43,701 INFO L175 Difference]: Start difference. First operand has 397 places, 521 transitions, 6788 flow. Second operand 13 states and 205 transitions. [2024-06-14 13:18:43,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 556 transitions, 8378 flow [2024-06-14 13:18:45,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 556 transitions, 8166 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 13:18:45,953 INFO L231 Difference]: Finished difference. Result has 406 places, 521 transitions, 6786 flow [2024-06-14 13:18:45,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6576, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6786, PETRI_PLACES=406, PETRI_TRANSITIONS=521} [2024-06-14 13:18:45,954 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-14 13:18:45,954 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 521 transitions, 6786 flow [2024-06-14 13:18:45,954 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) [2024-06-14 13:18:45,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:45,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:45,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:18:45,954 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:45,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:45,955 INFO L85 PathProgramCache]: Analyzing trace with hash 992685223, now seen corresponding path program 9 times [2024-06-14 13:18:45,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:45,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654077948] [2024-06-14 13:18:45,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:45,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:49,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:49,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654077948] [2024-06-14 13:18:49,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654077948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:49,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:49,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:49,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593586006] [2024-06-14 13:18:49,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:49,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:49,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:49,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:49,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:49,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:49,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 521 transitions, 6786 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) [2024-06-14 13:18:49,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:49,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:49,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:52,084 INFO L124 PetriNetUnfolderBase]: 3214/5267 cut-off events. [2024-06-14 13:18:52,084 INFO L125 PetriNetUnfolderBase]: For 629405/629407 co-relation queries the response was YES. [2024-06-14 13:18:52,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40892 conditions, 5267 events. 3214/5267 cut-off events. For 629405/629407 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 33100 event pairs, 609 based on Foata normal form. 2/5266 useless extension candidates. Maximal degree in co-relation 40721. Up to 4769 conditions per place. [2024-06-14 13:18:52,165 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 471 selfloop transitions, 75 changer transitions 0/551 dead transitions. [2024-06-14 13:18:52,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 551 transitions, 8152 flow [2024-06-14 13:18:52,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:18:52,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:18:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-14 13:18:52,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-14 13:18:52,166 INFO L175 Difference]: Start difference. First operand has 406 places, 521 transitions, 6786 flow. Second operand 12 states and 189 transitions. [2024-06-14 13:18:52,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 551 transitions, 8152 flow [2024-06-14 13:18:54,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 551 transitions, 7924 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-06-14 13:18:54,455 INFO L231 Difference]: Finished difference. Result has 406 places, 521 transitions, 6715 flow [2024-06-14 13:18:54,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6558, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6715, PETRI_PLACES=406, PETRI_TRANSITIONS=521} [2024-06-14 13:18:54,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-14 13:18:54,456 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 521 transitions, 6715 flow [2024-06-14 13:18:54,456 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) [2024-06-14 13:18:54,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:54,456 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] [2024-06-14 13:18:54,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:18:54,456 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:54,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:54,456 INFO L85 PathProgramCache]: Analyzing trace with hash 996409687, now seen corresponding path program 11 times [2024-06-14 13:18:54,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:54,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782901046] [2024-06-14 13:18:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:54,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:58,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:58,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782901046] [2024-06-14 13:18:58,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782901046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:58,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:58,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:58,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471495190] [2024-06-14 13:18:58,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:58,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:58,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:58,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:58,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:58,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:58,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 521 transitions, 6715 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) [2024-06-14 13:18:58,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:58,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:58,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:00,467 INFO L124 PetriNetUnfolderBase]: 3235/5300 cut-off events. [2024-06-14 13:19:00,467 INFO L125 PetriNetUnfolderBase]: For 647130/647135 co-relation queries the response was YES. [2024-06-14 13:19:00,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41366 conditions, 5300 events. 3235/5300 cut-off events. For 647130/647135 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 33333 event pairs, 637 based on Foata normal form. 3/5299 useless extension candidates. Maximal degree in co-relation 41194. Up to 4675 conditions per place. [2024-06-14 13:19:00,538 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 409 selfloop transitions, 140 changer transitions 0/554 dead transitions. [2024-06-14 13:19:00,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 554 transitions, 8453 flow [2024-06-14 13:19:00,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:19:00,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:19:00,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-14 13:19:00,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813953488372093 [2024-06-14 13:19:00,540 INFO L175 Difference]: Start difference. First operand has 406 places, 521 transitions, 6715 flow. Second operand 10 states and 164 transitions. [2024-06-14 13:19:00,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 554 transitions, 8453 flow [2024-06-14 13:19:03,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 554 transitions, 8303 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 13:19:03,236 INFO L231 Difference]: Finished difference. Result has 407 places, 530 transitions, 7087 flow [2024-06-14 13:19:03,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6565, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7087, PETRI_PLACES=407, PETRI_TRANSITIONS=530} [2024-06-14 13:19:03,237 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-14 13:19:03,237 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 530 transitions, 7087 flow [2024-06-14 13:19:03,237 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) [2024-06-14 13:19:03,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:03,237 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] [2024-06-14 13:19:03,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:19:03,237 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)] === [2024-06-14 13:19:03,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:03,237 INFO L85 PathProgramCache]: Analyzing trace with hash 996404293, now seen corresponding path program 10 times [2024-06-14 13:19:03,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:03,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752604020] [2024-06-14 13:19:03,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:03,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:06,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:06,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752604020] [2024-06-14 13:19:06,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752604020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:06,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:06,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:19:06,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256310608] [2024-06-14 13:19:06,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:06,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:19:06,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:06,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:19:06,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:19:06,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:06,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 530 transitions, 7087 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) [2024-06-14 13:19:06,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:06,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:06,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:09,333 INFO L124 PetriNetUnfolderBase]: 3229/5294 cut-off events. [2024-06-14 13:19:09,333 INFO L125 PetriNetUnfolderBase]: For 654603/654608 co-relation queries the response was YES. [2024-06-14 13:19:09,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41466 conditions, 5294 events. 3229/5294 cut-off events. For 654603/654608 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 33358 event pairs, 614 based on Foata normal form. 4/5294 useless extension candidates. Maximal degree in co-relation 41291. Up to 4455 conditions per place. [2024-06-14 13:19:09,425 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 372 selfloop transitions, 187 changer transitions 0/564 dead transitions. [2024-06-14 13:19:09,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 564 transitions, 9103 flow [2024-06-14 13:19:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:19:09,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:19:09,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 210 transitions. [2024-06-14 13:19:09,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3756708407871199 [2024-06-14 13:19:09,426 INFO L175 Difference]: Start difference. First operand has 407 places, 530 transitions, 7087 flow. Second operand 13 states and 210 transitions. [2024-06-14 13:19:09,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 564 transitions, 9103 flow [2024-06-14 13:19:12,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 564 transitions, 8783 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 13:19:12,249 INFO L231 Difference]: Finished difference. Result has 414 places, 530 transitions, 7147 flow [2024-06-14 13:19:12,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6767, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7147, PETRI_PLACES=414, PETRI_TRANSITIONS=530} [2024-06-14 13:19:12,250 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 370 predicate places. [2024-06-14 13:19:12,250 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 530 transitions, 7147 flow [2024-06-14 13:19:12,250 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) [2024-06-14 13:19:12,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:12,250 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] [2024-06-14 13:19:12,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:19:12,251 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)] === [2024-06-14 13:19:12,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:12,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1003647133, now seen corresponding path program 11 times [2024-06-14 13:19:12,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:12,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915272753] [2024-06-14 13:19:12,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:12,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:15,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:15,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915272753] [2024-06-14 13:19:15,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915272753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:15,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:15,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:19:15,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437878647] [2024-06-14 13:19:15,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:15,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:19:15,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:15,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:19:15,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:19:15,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:15,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 530 transitions, 7147 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) [2024-06-14 13:19:15,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:15,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:15,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:18,254 INFO L124 PetriNetUnfolderBase]: 3223/5286 cut-off events. [2024-06-14 13:19:18,255 INFO L125 PetriNetUnfolderBase]: For 655806/655808 co-relation queries the response was YES. [2024-06-14 13:19:18,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41453 conditions, 5286 events. 3223/5286 cut-off events. For 655806/655808 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 33240 event pairs, 608 based on Foata normal form. 2/5285 useless extension candidates. Maximal degree in co-relation 41277. Up to 4807 conditions per place. [2024-06-14 13:19:18,323 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 490 selfloop transitions, 61 changer transitions 0/556 dead transitions. [2024-06-14 13:19:18,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 556 transitions, 8315 flow [2024-06-14 13:19:18,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:19:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:19:18,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-14 13:19:18,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767441860465116 [2024-06-14 13:19:18,324 INFO L175 Difference]: Start difference. First operand has 414 places, 530 transitions, 7147 flow. Second operand 10 states and 162 transitions. [2024-06-14 13:19:18,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 556 transitions, 8315 flow [2024-06-14 13:19:21,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 556 transitions, 7921 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-14 13:19:21,017 INFO L231 Difference]: Finished difference. Result has 414 places, 530 transitions, 6881 flow [2024-06-14 13:19:21,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6753, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6881, PETRI_PLACES=414, PETRI_TRANSITIONS=530} [2024-06-14 13:19:21,018 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 370 predicate places. [2024-06-14 13:19:21,018 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 530 transitions, 6881 flow [2024-06-14 13:19:21,018 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) [2024-06-14 13:19:21,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:21,018 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] [2024-06-14 13:19:21,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:19:21,018 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)] === [2024-06-14 13:19:21,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:21,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1003767289, now seen corresponding path program 6 times [2024-06-14 13:19:21,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:21,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921259273] [2024-06-14 13:19:21,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:21,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:24,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:24,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921259273] [2024-06-14 13:19:24,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921259273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:24,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:24,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:19:24,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711610145] [2024-06-14 13:19:24,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:24,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:19:24,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:24,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:19:24,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:19:24,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:24,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 530 transitions, 6881 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) [2024-06-14 13:19:24,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:24,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:24,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:27,111 INFO L124 PetriNetUnfolderBase]: 3217/5272 cut-off events. [2024-06-14 13:19:27,111 INFO L125 PetriNetUnfolderBase]: For 656300/656309 co-relation queries the response was YES. [2024-06-14 13:19:27,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40915 conditions, 5272 events. 3217/5272 cut-off events. For 656300/656309 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 33163 event pairs, 604 based on Foata normal form. 10/5278 useless extension candidates. Maximal degree in co-relation 40738. Up to 4727 conditions per place. [2024-06-14 13:19:27,194 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 455 selfloop transitions, 102 changer transitions 0/562 dead transitions. [2024-06-14 13:19:27,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 562 transitions, 8289 flow [2024-06-14 13:19:27,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:19:27,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:19:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-14 13:19:27,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-14 13:19:27,195 INFO L175 Difference]: Start difference. First operand has 414 places, 530 transitions, 6881 flow. Second operand 12 states and 189 transitions. [2024-06-14 13:19:27,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 562 transitions, 8289 flow [2024-06-14 13:19:30,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 562 transitions, 8113 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-14 13:19:30,034 INFO L231 Difference]: Finished difference. Result has 416 places, 530 transitions, 6915 flow [2024-06-14 13:19:30,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6705, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6915, PETRI_PLACES=416, PETRI_TRANSITIONS=530} [2024-06-14 13:19:30,035 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-14 13:19:30,035 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 530 transitions, 6915 flow [2024-06-14 13:19:30,035 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) [2024-06-14 13:19:30,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:30,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:30,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:19:30,035 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)] === [2024-06-14 13:19:30,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:30,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1524737655, now seen corresponding path program 12 times [2024-06-14 13:19:30,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:30,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655513717] [2024-06-14 13:19:30,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:30,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:33,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:33,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655513717] [2024-06-14 13:19:33,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655513717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:33,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:33,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:19:33,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782002080] [2024-06-14 13:19:33,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:33,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:19:33,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:33,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:19:33,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:19:33,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:33,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 530 transitions, 6915 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) [2024-06-14 13:19:33,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:33,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:33,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:35,518 INFO L124 PetriNetUnfolderBase]: 3211/5262 cut-off events. [2024-06-14 13:19:35,518 INFO L125 PetriNetUnfolderBase]: For 657148/657153 co-relation queries the response was YES. [2024-06-14 13:19:35,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40838 conditions, 5262 events. 3211/5262 cut-off events. For 657148/657153 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 33076 event pairs, 609 based on Foata normal form. 4/5262 useless extension candidates. Maximal degree in co-relation 40660. Up to 4437 conditions per place. [2024-06-14 13:19:35,779 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 375 selfloop transitions, 178 changer transitions 0/558 dead transitions. [2024-06-14 13:19:35,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 558 transitions, 8511 flow [2024-06-14 13:19:35,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:19:35,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:19:35,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-14 13:19:35,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:19:35,783 INFO L175 Difference]: Start difference. First operand has 416 places, 530 transitions, 6915 flow. Second operand 10 states and 170 transitions. [2024-06-14 13:19:35,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 558 transitions, 8511 flow [2024-06-14 13:19:38,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 558 transitions, 8300 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-14 13:19:38,545 INFO L231 Difference]: Finished difference. Result has 416 places, 530 transitions, 7066 flow [2024-06-14 13:19:38,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6704, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7066, PETRI_PLACES=416, PETRI_TRANSITIONS=530} [2024-06-14 13:19:38,546 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-14 13:19:38,546 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 530 transitions, 7066 flow [2024-06-14 13:19:38,546 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) [2024-06-14 13:19:38,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:38,547 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] [2024-06-14 13:19:38,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:19:38,547 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:38,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:38,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1710647351, now seen corresponding path program 12 times [2024-06-14 13:19:38,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:38,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506735792] [2024-06-14 13:19:38,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:38,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:42,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:42,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506735792] [2024-06-14 13:19:42,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506735792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:42,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:42,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:19:42,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113268501] [2024-06-14 13:19:42,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:42,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:19:42,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:42,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:19:42,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:19:42,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:42,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 530 transitions, 7066 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) [2024-06-14 13:19:42,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:42,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:42,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:44,624 INFO L124 PetriNetUnfolderBase]: 3208/5276 cut-off events. [2024-06-14 13:19:44,624 INFO L125 PetriNetUnfolderBase]: For 658027/658032 co-relation queries the response was YES. [2024-06-14 13:19:44,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41052 conditions, 5276 events. 3208/5276 cut-off events. For 658027/658032 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 33338 event pairs, 641 based on Foata normal form. 3/5275 useless extension candidates. Maximal degree in co-relation 40873. Up to 4640 conditions per place. [2024-06-14 13:19:44,706 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 409 selfloop transitions, 141 changer transitions 0/555 dead transitions. [2024-06-14 13:19:44,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 555 transitions, 8442 flow [2024-06-14 13:19:44,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:19:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:19:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 187 transitions. [2024-06-14 13:19:44,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3624031007751938 [2024-06-14 13:19:44,708 INFO L175 Difference]: Start difference. First operand has 416 places, 530 transitions, 7066 flow. Second operand 12 states and 187 transitions. [2024-06-14 13:19:44,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 555 transitions, 8442 flow [2024-06-14 13:19:47,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 555 transitions, 8032 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-14 13:19:47,466 INFO L231 Difference]: Finished difference. Result has 418 places, 530 transitions, 6944 flow [2024-06-14 13:19:47,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6656, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6944, PETRI_PLACES=418, PETRI_TRANSITIONS=530} [2024-06-14 13:19:47,466 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-14 13:19:47,466 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 530 transitions, 6944 flow [2024-06-14 13:19:47,466 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) [2024-06-14 13:19:47,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:47,467 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] [2024-06-14 13:19:47,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:19:47,467 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:47,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:47,467 INFO L85 PathProgramCache]: Analyzing trace with hash 420129553, now seen corresponding path program 4 times [2024-06-14 13:19:47,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:47,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936601854] [2024-06-14 13:19:47,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:47,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:51,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:51,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936601854] [2024-06-14 13:19:51,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936601854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:51,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:51,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:19:51,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075726158] [2024-06-14 13:19:51,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:51,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:19:51,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:51,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:19:51,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:19:51,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:51,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 530 transitions, 6944 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) [2024-06-14 13:19:51,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:51,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:51,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:53,068 INFO L124 PetriNetUnfolderBase]: 3190/5243 cut-off events. [2024-06-14 13:19:53,069 INFO L125 PetriNetUnfolderBase]: For 662550/662556 co-relation queries the response was YES. [2024-06-14 13:19:53,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39890 conditions, 5243 events. 3190/5243 cut-off events. For 662550/662556 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 32990 event pairs, 471 based on Foata normal form. 14/5254 useless extension candidates. Maximal degree in co-relation 39710. Up to 4423 conditions per place. [2024-06-14 13:19:53,151 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 493 selfloop transitions, 78 changer transitions 0/576 dead transitions. [2024-06-14 13:19:53,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 576 transitions, 8266 flow [2024-06-14 13:19:53,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:19:53,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:19:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 13:19:53,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-14 13:19:53,152 INFO L175 Difference]: Start difference. First operand has 418 places, 530 transitions, 6944 flow. Second operand 10 states and 176 transitions. [2024-06-14 13:19:53,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 576 transitions, 8266 flow [2024-06-14 13:19:56,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 576 transitions, 7986 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-14 13:19:56,104 INFO L231 Difference]: Finished difference. Result has 418 places, 530 transitions, 6830 flow [2024-06-14 13:19:56,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6664, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6830, PETRI_PLACES=418, PETRI_TRANSITIONS=530} [2024-06-14 13:19:56,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-14 13:19:56,105 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 530 transitions, 6830 flow [2024-06-14 13:19:56,105 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) [2024-06-14 13:19:56,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:56,105 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] [2024-06-14 13:19:56,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:19:56,105 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:56,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:56,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1793412201, now seen corresponding path program 13 times [2024-06-14 13:19:56,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:56,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641828109] [2024-06-14 13:19:56,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:56,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:59,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:59,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641828109] [2024-06-14 13:19:59,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641828109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:59,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:59,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:19:59,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593258594] [2024-06-14 13:19:59,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:59,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:19:59,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:59,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:19:59,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:19:59,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:59,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 530 transitions, 6830 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) [2024-06-14 13:19:59,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:59,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:59,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:02,197 INFO L124 PetriNetUnfolderBase]: 3219/5287 cut-off events. [2024-06-14 13:20:02,197 INFO L125 PetriNetUnfolderBase]: For 653031/653039 co-relation queries the response was YES. [2024-06-14 13:20:02,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40749 conditions, 5287 events. 3219/5287 cut-off events. For 653031/653039 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 33370 event pairs, 639 based on Foata normal form. 2/5276 useless extension candidates. Maximal degree in co-relation 40568. Up to 4447 conditions per place. [2024-06-14 13:20:02,283 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 367 selfloop transitions, 204 changer transitions 0/576 dead transitions. [2024-06-14 13:20:02,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 576 transitions, 9201 flow [2024-06-14 13:20:02,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:20:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:20:02,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:20:02,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 13:20:02,285 INFO L175 Difference]: Start difference. First operand has 418 places, 530 transitions, 6830 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:20:02,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 576 transitions, 9201 flow [2024-06-14 13:20:05,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 576 transitions, 9044 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-14 13:20:05,686 INFO L231 Difference]: Finished difference. Result has 419 places, 542 transitions, 7384 flow [2024-06-14 13:20:05,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6697, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7384, PETRI_PLACES=419, PETRI_TRANSITIONS=542} [2024-06-14 13:20:05,687 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 375 predicate places. [2024-06-14 13:20:05,687 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 542 transitions, 7384 flow [2024-06-14 13:20:05,687 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) [2024-06-14 13:20:05,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:05,687 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] [2024-06-14 13:20:05,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:20:05,688 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:05,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:05,688 INFO L85 PathProgramCache]: Analyzing trace with hash 676887419, now seen corresponding path program 7 times [2024-06-14 13:20:05,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:05,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000237294] [2024-06-14 13:20:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:05,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:09,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:09,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000237294] [2024-06-14 13:20:09,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000237294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:09,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:09,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:09,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031635374] [2024-06-14 13:20:09,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:09,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:09,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:09,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:09,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:09,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:20:09,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 542 transitions, 7384 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) [2024-06-14 13:20:09,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:09,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:20:09,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:11,513 INFO L124 PetriNetUnfolderBase]: 3245/5323 cut-off events. [2024-06-14 13:20:11,513 INFO L125 PetriNetUnfolderBase]: For 648437/648458 co-relation queries the response was YES. [2024-06-14 13:20:11,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41184 conditions, 5323 events. 3245/5323 cut-off events. For 648437/648458 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 33600 event pairs, 620 based on Foata normal form. 16/5332 useless extension candidates. Maximal degree in co-relation 41003. Up to 4729 conditions per place. [2024-06-14 13:20:11,600 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 462 selfloop transitions, 116 changer transitions 0/583 dead transitions. [2024-06-14 13:20:11,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 583 transitions, 9146 flow [2024-06-14 13:20:11,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:20:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:20:11,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-14 13:20:11,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38477801268498946 [2024-06-14 13:20:11,601 INFO L175 Difference]: Start difference. First operand has 419 places, 542 transitions, 7384 flow. Second operand 11 states and 182 transitions. [2024-06-14 13:20:11,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 583 transitions, 9146 flow [2024-06-14 13:20:14,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 583 transitions, 8534 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-14 13:20:14,809 INFO L231 Difference]: Finished difference. Result has 424 places, 548 transitions, 7094 flow [2024-06-14 13:20:14,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6772, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7094, PETRI_PLACES=424, PETRI_TRANSITIONS=548} [2024-06-14 13:20:14,810 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 380 predicate places. [2024-06-14 13:20:14,810 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 548 transitions, 7094 flow [2024-06-14 13:20:14,810 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) [2024-06-14 13:20:14,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:14,810 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] [2024-06-14 13:20:14,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:20:14,810 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:14,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:14,811 INFO L85 PathProgramCache]: Analyzing trace with hash 976556153, now seen corresponding path program 14 times [2024-06-14 13:20:14,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:14,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253027508] [2024-06-14 13:20:14,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:14,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:18,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:18,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253027508] [2024-06-14 13:20:18,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253027508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:18,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:18,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:18,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857700615] [2024-06-14 13:20:18,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:18,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:18,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:18,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:18,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:18,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:20:18,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 548 transitions, 7094 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) [2024-06-14 13:20:18,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:18,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:20:18,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:20,839 INFO L124 PetriNetUnfolderBase]: 3250/5324 cut-off events. [2024-06-14 13:20:20,840 INFO L125 PetriNetUnfolderBase]: For 651290/651298 co-relation queries the response was YES. [2024-06-14 13:20:20,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40812 conditions, 5324 events. 3250/5324 cut-off events. For 651290/651298 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 33565 event pairs, 638 based on Foata normal form. 2/5313 useless extension candidates. Maximal degree in co-relation 40631. Up to 4489 conditions per place. [2024-06-14 13:20:20,928 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 353 selfloop transitions, 225 changer transitions 0/583 dead transitions. [2024-06-14 13:20:20,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 583 transitions, 8820 flow [2024-06-14 13:20:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:20:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:20:20,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 13:20:20,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-14 13:20:20,929 INFO L175 Difference]: Start difference. First operand has 424 places, 548 transitions, 7094 flow. Second operand 9 states and 161 transitions. [2024-06-14 13:20:20,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 583 transitions, 8820 flow [2024-06-14 13:20:23,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 583 transitions, 8537 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-14 13:20:23,928 INFO L231 Difference]: Finished difference. Result has 425 places, 551 transitions, 7321 flow [2024-06-14 13:20:23,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6811, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7321, PETRI_PLACES=425, PETRI_TRANSITIONS=551} [2024-06-14 13:20:23,929 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 381 predicate places. [2024-06-14 13:20:23,929 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 551 transitions, 7321 flow [2024-06-14 13:20:23,929 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) [2024-06-14 13:20:23,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:23,929 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] [2024-06-14 13:20:23,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:20:23,929 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:23,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:23,929 INFO L85 PathProgramCache]: Analyzing trace with hash 976855055, now seen corresponding path program 8 times [2024-06-14 13:20:23,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:23,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890277975] [2024-06-14 13:20:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:23,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:27,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:27,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:27,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890277975] [2024-06-14 13:20:27,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890277975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:27,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:27,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:27,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323619600] [2024-06-14 13:20:27,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:27,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:27,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:27,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:27,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:27,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:20:27,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 551 transitions, 7321 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) [2024-06-14 13:20:27,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:27,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:20:27,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:29,531 INFO L124 PetriNetUnfolderBase]: 3260/5340 cut-off events. [2024-06-14 13:20:29,531 INFO L125 PetriNetUnfolderBase]: For 669256/669277 co-relation queries the response was YES. [2024-06-14 13:20:29,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41206 conditions, 5340 events. 3260/5340 cut-off events. For 669256/669277 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 33636 event pairs, 618 based on Foata normal form. 16/5349 useless extension candidates. Maximal degree in co-relation 41024. Up to 4802 conditions per place. [2024-06-14 13:20:29,618 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 476 selfloop transitions, 105 changer transitions 0/586 dead transitions. [2024-06-14 13:20:29,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 586 transitions, 8823 flow [2024-06-14 13:20:29,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:20:29,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:20:29,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-14 13:20:29,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386046511627907 [2024-06-14 13:20:29,619 INFO L175 Difference]: Start difference. First operand has 425 places, 551 transitions, 7321 flow. Second operand 10 states and 166 transitions. [2024-06-14 13:20:29,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 586 transitions, 8823 flow [2024-06-14 13:20:32,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 586 transitions, 8289 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-14 13:20:32,918 INFO L231 Difference]: Finished difference. Result has 428 places, 554 transitions, 7035 flow [2024-06-14 13:20:32,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6787, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7035, PETRI_PLACES=428, PETRI_TRANSITIONS=554} [2024-06-14 13:20:32,919 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 384 predicate places. [2024-06-14 13:20:32,919 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 554 transitions, 7035 flow [2024-06-14 13:20:32,919 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) [2024-06-14 13:20:32,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:32,919 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] [2024-06-14 13:20:32,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:20:32,919 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:32,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:32,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1798774581, now seen corresponding path program 15 times [2024-06-14 13:20:32,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:32,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395207651] [2024-06-14 13:20:32,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:32,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:36,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:36,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395207651] [2024-06-14 13:20:36,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395207651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:36,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:36,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:36,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866801101] [2024-06-14 13:20:36,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:36,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:36,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:36,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:36,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:36,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:20:36,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 554 transitions, 7035 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) [2024-06-14 13:20:36,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:36,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:20:36,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:39,049 INFO L124 PetriNetUnfolderBase]: 3265/5363 cut-off events. [2024-06-14 13:20:39,049 INFO L125 PetriNetUnfolderBase]: For 670318/670326 co-relation queries the response was YES. [2024-06-14 13:20:39,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40675 conditions, 5363 events. 3265/5363 cut-off events. For 670318/670326 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 33934 event pairs, 646 based on Foata normal form. 2/5352 useless extension candidates. Maximal degree in co-relation 40492. Up to 4509 conditions per place. [2024-06-14 13:20:39,128 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 370 selfloop transitions, 215 changer transitions 0/590 dead transitions. [2024-06-14 13:20:39,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 590 transitions, 9003 flow [2024-06-14 13:20:39,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:20:39,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:20:39,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:20:39,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 13:20:39,130 INFO L175 Difference]: Start difference. First operand has 428 places, 554 transitions, 7035 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:20:39,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 590 transitions, 9003 flow [2024-06-14 13:20:42,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 590 transitions, 8757 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 13:20:42,550 INFO L231 Difference]: Finished difference. Result has 429 places, 557 transitions, 7279 flow [2024-06-14 13:20:42,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6789, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7279, PETRI_PLACES=429, PETRI_TRANSITIONS=557} [2024-06-14 13:20:42,551 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-14 13:20:42,551 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 557 transitions, 7279 flow [2024-06-14 13:20:42,551 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) [2024-06-14 13:20:42,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:42,551 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] [2024-06-14 13:20:42,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:20:42,551 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:42,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:42,552 INFO L85 PathProgramCache]: Analyzing trace with hash -848111895, now seen corresponding path program 16 times [2024-06-14 13:20:42,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:42,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223626257] [2024-06-14 13:20:42,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:42,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:46,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:46,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223626257] [2024-06-14 13:20:46,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223626257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:46,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:46,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:46,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855230709] [2024-06-14 13:20:46,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:46,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:46,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:46,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:46,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:46,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:20:46,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 557 transitions, 7279 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) [2024-06-14 13:20:46,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:46,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:20:46,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:48,561 INFO L124 PetriNetUnfolderBase]: 3270/5352 cut-off events. [2024-06-14 13:20:48,561 INFO L125 PetriNetUnfolderBase]: For 683857/683865 co-relation queries the response was YES. [2024-06-14 13:20:48,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41078 conditions, 5352 events. 3270/5352 cut-off events. For 683857/683865 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 33729 event pairs, 634 based on Foata normal form. 2/5341 useless extension candidates. Maximal degree in co-relation 40894. Up to 4515 conditions per place. [2024-06-14 13:20:48,643 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 355 selfloop transitions, 228 changer transitions 0/588 dead transitions. [2024-06-14 13:20:48,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 588 transitions, 9009 flow [2024-06-14 13:20:48,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:20:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:20:48,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:20:48,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-14 13:20:48,645 INFO L175 Difference]: Start difference. First operand has 429 places, 557 transitions, 7279 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:20:48,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 588 transitions, 9009 flow [2024-06-14 13:20:52,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 588 transitions, 8505 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 13:20:52,232 INFO L231 Difference]: Finished difference. Result has 431 places, 560 transitions, 7285 flow [2024-06-14 13:20:52,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6781, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7285, PETRI_PLACES=431, PETRI_TRANSITIONS=560} [2024-06-14 13:20:52,233 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-14 13:20:52,233 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 560 transitions, 7285 flow [2024-06-14 13:20:52,233 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) [2024-06-14 13:20:52,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:52,233 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, 1] [2024-06-14 13:20:52,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:20:52,233 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:52,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:52,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1588996899, now seen corresponding path program 9 times [2024-06-14 13:20:52,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:52,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079392258] [2024-06-14 13:20:52,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:52,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:55,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:55,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079392258] [2024-06-14 13:20:55,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079392258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:55,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:55,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:55,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787379488] [2024-06-14 13:20:55,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:55,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:55,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:55,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:55,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:55,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:20:55,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 560 transitions, 7285 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) [2024-06-14 13:20:55,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:55,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:20:55,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:58,270 INFO L124 PetriNetUnfolderBase]: 3280/5380 cut-off events. [2024-06-14 13:20:58,270 INFO L125 PetriNetUnfolderBase]: For 700919/700940 co-relation queries the response was YES. [2024-06-14 13:20:58,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41232 conditions, 5380 events. 3280/5380 cut-off events. For 700919/700940 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 34013 event pairs, 622 based on Foata normal form. 16/5389 useless extension candidates. Maximal degree in co-relation 41047. Up to 4843 conditions per place. [2024-06-14 13:20:58,349 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 481 selfloop transitions, 102 changer transitions 0/588 dead transitions. [2024-06-14 13:20:58,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 588 transitions, 8553 flow [2024-06-14 13:20:58,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:20:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:20:58,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:20:58,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-14 13:20:58,350 INFO L175 Difference]: Start difference. First operand has 431 places, 560 transitions, 7285 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:20:58,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 588 transitions, 8553 flow Killed by 15