./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix026_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix026_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix026_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix026_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:12:38,567 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:12:38,639 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:12:38,643 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:12:38,644 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:12:38,672 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:12:38,672 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:12:38,672 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:12:38,673 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:12:38,676 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:12:38,676 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:12:38,676 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:12:38,677 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:12:38,678 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:12:38,678 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:12:38,678 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:12:38,678 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:12:38,679 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:12:38,679 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:12:38,679 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:12:38,679 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:12:38,679 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:12:38,680 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:12:38,680 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:12:38,680 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:12:38,680 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:12:38,680 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:12:38,681 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:12:38,681 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:12:38,681 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:12:38,682 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:12:38,682 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:12:38,682 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:12:38,682 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:12:38,683 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:12:38,683 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:12:38,683 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:12:38,683 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:12:38,683 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:12:38,683 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:12:38,684 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:12:38,684 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:12:38,684 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:12:38,684 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:12:38,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:12:38,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:12:38,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:12:38,889 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:12:38,890 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:12:38,890 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix026_pso.opt_rmo.opt.i [2024-06-14 12:12:39,874 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:12:40,023 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:12:40,024 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix026_pso.opt_rmo.opt.i [2024-06-14 12:12:40,043 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49b4d7146/0a503c09e9864c9991729742cc5a8468/FLAG9a03e3e85 [2024-06-14 12:12:40,053 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49b4d7146/0a503c09e9864c9991729742cc5a8468 [2024-06-14 12:12:40,055 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:12:40,056 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:12:40,056 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix026_pso.opt_rmo.opt.yml/witness.yml [2024-06-14 12:12:40,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:12:40,227 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:12:40,228 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:12:40,228 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:12:40,232 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:12:40,233 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:12:40" (1/2) ... [2024-06-14 12:12:40,233 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69fe501c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:12:40, skipping insertion in model container [2024-06-14 12:12:40,233 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:12:40" (1/2) ... [2024-06-14 12:12:40,254 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@357c13c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:12:40, skipping insertion in model container [2024-06-14 12:12:40,255 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:12:40" (2/2) ... [2024-06-14 12:12:40,255 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69fe501c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:12:40, skipping insertion in model container [2024-06-14 12:12:40,255 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:12:40" (2/2) ... [2024-06-14 12:12:40,255 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:12:40,351 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:12:40,352 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-14 12:12:40,353 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] ((((((((((((((((((((((! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-14 12:12:40,353 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-14 12:12:40,353 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] ((((((((((((((((((((((! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-14 12:12:40,354 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:12:40,354 INFO L106 edCorrectnessWitness]: ghost_update [L857-L857] multithreaded = 1; [2024-06-14 12:12:40,388 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:12:40,645 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:12:40,658 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:12:40,761 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:12:40,799 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:12:40,799 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:12:40 WrapperNode [2024-06-14 12:12:40,799 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:12:40,800 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:12:40,800 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:12:40,800 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:12:40,805 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:12:40" (1/1) ... [2024-06-14 12:12:40,816 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:12:40" (1/1) ... [2024-06-14 12:12:40,844 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 139 [2024-06-14 12:12:40,844 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:12:40,845 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:12:40,845 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:12:40,845 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:12:40,853 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:12:40" (1/1) ... [2024-06-14 12:12:40,853 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:12:40" (1/1) ... [2024-06-14 12:12:40,856 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:12:40" (1/1) ... [2024-06-14 12:12:40,880 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 12:12:40,881 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:12:40" (1/1) ... [2024-06-14 12:12:40,881 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:12:40" (1/1) ... [2024-06-14 12:12:40,892 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:12:40" (1/1) ... [2024-06-14 12:12:40,894 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:12:40" (1/1) ... [2024-06-14 12:12:40,895 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:12:40" (1/1) ... [2024-06-14 12:12:40,896 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:12:40" (1/1) ... [2024-06-14 12:12:40,899 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:12:40,900 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:12:40,900 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:12:40,900 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:12:40,901 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:12:40" (1/1) ... [2024-06-14 12:12:40,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:12:40,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:12:40,945 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 12:12:40,958 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 12:12:40,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:12:40,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:12:40,999 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:12:40,999 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:12:40,999 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:12:40,999 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:12:40,999 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:12:41,000 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:12:41,000 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 12:12:41,000 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 12:12:41,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:12:41,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:12:41,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:12:41,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:12:41,013 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 12:12:41,146 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:12:41,148 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:12:41,508 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:12:41,509 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:12:41,658 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:12:41,659 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:12:41,659 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:12:41 BoogieIcfgContainer [2024-06-14 12:12:41,659 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:12:41,661 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:12:41,661 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:12:41,663 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:12:41,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:12:40" (1/4) ... [2024-06-14 12:12:41,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@516927d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:12:41, skipping insertion in model container [2024-06-14 12:12:41,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:12:40" (2/4) ... [2024-06-14 12:12:41,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@516927d2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:12:41, skipping insertion in model container [2024-06-14 12:12:41,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:12:40" (3/4) ... [2024-06-14 12:12:41,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@516927d2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:12:41, skipping insertion in model container [2024-06-14 12:12:41,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:12:41" (4/4) ... [2024-06-14 12:12:41,665 INFO L112 eAbstractionObserver]: Analyzing ICFG mix026_pso.opt_rmo.opt.i [2024-06-14 12:12:41,679 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:12:41,679 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 12:12:41,679 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:12:41,717 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:12:41,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 12:12:41,774 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-14 12:12:41,774 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:12:41,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:12:41,776 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 12:12:41,778 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-14 12:12:41,789 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:12:41,794 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;@1194fce1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:12:41,794 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 12:12:41,797 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:12:41,797 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:12:41,797 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:12:41,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:41,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:12:41,797 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:12:41,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:41,829 INFO L85 PathProgramCache]: Analyzing trace with hash -784119696, now seen corresponding path program 1 times [2024-06-14 12:12:41,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:41,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196770031] [2024-06-14 12:12:41,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:41,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:42,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:42,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196770031] [2024-06-14 12:12:42,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196770031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:42,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:42,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:12:42,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934238463] [2024-06-14 12:12:42,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:42,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:12:42,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:42,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:12:42,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:12:42,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-14 12:12:42,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:42,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:42,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-14 12:12:42,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:44,128 INFO L124 PetriNetUnfolderBase]: 6401/9226 cut-off events. [2024-06-14 12:12:44,128 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2024-06-14 12:12:44,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18298 conditions, 9226 events. 6401/9226 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 53320 event pairs, 4681 based on Foata normal form. 1/8909 useless extension candidates. Maximal degree in co-relation 18282. Up to 8763 conditions per place. [2024-06-14 12:12:44,183 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 43 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-14 12:12:44,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 231 flow [2024-06-14 12:12:44,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:12:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:12:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-06-14 12:12:44,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6289308176100629 [2024-06-14 12:12:44,195 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 100 transitions. [2024-06-14 12:12:44,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 231 flow [2024-06-14 12:12:44,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 224 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:12:44,204 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-14 12:12:44,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-14 12:12:44,208 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-14 12:12:44,208 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-14 12:12:44,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:44,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:44,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:44,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:12:44,210 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:12:44,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:44,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1919730545, now seen corresponding path program 1 times [2024-06-14 12:12:44,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:44,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904410263] [2024-06-14 12:12:44,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:44,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:44,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:44,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904410263] [2024-06-14 12:12:44,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904410263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:44,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:44,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:12:44,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940178637] [2024-06-14 12:12:44,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:44,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:12:44,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:44,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:12:44,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:12:44,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-14 12:12:44,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:44,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:44,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-14 12:12:44,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:45,979 INFO L124 PetriNetUnfolderBase]: 7489/10480 cut-off events. [2024-06-14 12:12:45,979 INFO L125 PetriNetUnfolderBase]: For 2089/2089 co-relation queries the response was YES. [2024-06-14 12:12:45,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23889 conditions, 10480 events. 7489/10480 cut-off events. For 2089/2089 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 58664 event pairs, 4729 based on Foata normal form. 4/10440 useless extension candidates. Maximal degree in co-relation 23874. Up to 10186 conditions per place. [2024-06-14 12:12:46,034 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 54 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-14 12:12:46,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 325 flow [2024-06-14 12:12:46,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:12:46,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:12:46,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-14 12:12:46,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990566037735849 [2024-06-14 12:12:46,039 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 127 transitions. [2024-06-14 12:12:46,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 325 flow [2024-06-14 12:12:46,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:12:46,047 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-14 12:12:46,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-14 12:12:46,048 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-14 12:12:46,048 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-14 12:12:46,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:46,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:46,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:46,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:12:46,049 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:12:46,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:46,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1092545550, now seen corresponding path program 1 times [2024-06-14 12:12:46,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:46,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037649562] [2024-06-14 12:12:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:46,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:46,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:46,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037649562] [2024-06-14 12:12:46,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037649562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:46,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:46,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:12:46,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088720636] [2024-06-14 12:12:46,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:46,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:12:46,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:46,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:12:46,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:12:47,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:12:47,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:47,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:47,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:12:47,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:48,277 INFO L124 PetriNetUnfolderBase]: 9511/13195 cut-off events. [2024-06-14 12:12:48,277 INFO L125 PetriNetUnfolderBase]: For 7070/7070 co-relation queries the response was YES. [2024-06-14 12:12:48,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33310 conditions, 13195 events. 9511/13195 cut-off events. For 7070/7070 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 72140 event pairs, 4705 based on Foata normal form. 8/13152 useless extension candidates. Maximal degree in co-relation 33293. Up to 12817 conditions per place. [2024-06-14 12:12:48,335 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 72 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-14 12:12:48,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 490 flow [2024-06-14 12:12:48,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:12:48,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:12:48,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-14 12:12:48,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534591194968553 [2024-06-14 12:12:48,337 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 176 transitions. [2024-06-14 12:12:48,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 490 flow [2024-06-14 12:12:48,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 462 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 12:12:48,340 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 243 flow [2024-06-14 12:12:48,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-14 12:12:48,341 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-14 12:12:48,341 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 243 flow [2024-06-14 12:12:48,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:48,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:48,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:48,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:12:48,342 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:12:48,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:48,343 INFO L85 PathProgramCache]: Analyzing trace with hash 920881242, now seen corresponding path program 1 times [2024-06-14 12:12:48,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:48,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965406035] [2024-06-14 12:12:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:48,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:49,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:49,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965406035] [2024-06-14 12:12:49,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965406035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:49,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:49,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:12:49,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29023606] [2024-06-14 12:12:49,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:49,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:12:49,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:49,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:12:49,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:12:49,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:12:49,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:49,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:49,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:12:49,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:50,345 INFO L124 PetriNetUnfolderBase]: 8098/11568 cut-off events. [2024-06-14 12:12:50,345 INFO L125 PetriNetUnfolderBase]: For 11519/11519 co-relation queries the response was YES. [2024-06-14 12:12:50,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31941 conditions, 11568 events. 8098/11568 cut-off events. For 11519/11519 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 65544 event pairs, 4248 based on Foata normal form. 6/11382 useless extension candidates. Maximal degree in co-relation 31922. Up to 11002 conditions per place. [2024-06-14 12:12:50,397 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 61 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-14 12:12:50,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 453 flow [2024-06-14 12:12:50,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:12:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:12:50,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-14 12:12:50,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018867924528302 [2024-06-14 12:12:50,399 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 243 flow. Second operand 5 states and 133 transitions. [2024-06-14 12:12:50,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 453 flow [2024-06-14 12:12:50,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 79 transitions, 415 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 12:12:50,402 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 266 flow [2024-06-14 12:12:50,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-14 12:12:50,403 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-14 12:12:50,403 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 266 flow [2024-06-14 12:12:50,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:50,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:50,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:50,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:12:50,404 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:12:50,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:50,404 INFO L85 PathProgramCache]: Analyzing trace with hash -134540783, now seen corresponding path program 1 times [2024-06-14 12:12:50,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:50,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126427630] [2024-06-14 12:12:50,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:50,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:51,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:51,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126427630] [2024-06-14 12:12:51,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126427630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:51,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:51,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:12:51,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613800719] [2024-06-14 12:12:51,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:51,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:12:51,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:51,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:12:51,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:12:51,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:12:51,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 266 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:51,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:51,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:12:51,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:52,795 INFO L124 PetriNetUnfolderBase]: 9537/13238 cut-off events. [2024-06-14 12:12:52,796 INFO L125 PetriNetUnfolderBase]: For 21090/21090 co-relation queries the response was YES. [2024-06-14 12:12:52,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40077 conditions, 13238 events. 9537/13238 cut-off events. For 21090/21090 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 72171 event pairs, 4804 based on Foata normal form. 6/13194 useless extension candidates. Maximal degree in co-relation 40056. Up to 12809 conditions per place. [2024-06-14 12:12:52,861 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 74 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-14 12:12:52,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 102 transitions, 618 flow [2024-06-14 12:12:52,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:12:52,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:12:52,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-14 12:12:52,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125786163522013 [2024-06-14 12:12:52,863 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 266 flow. Second operand 6 states and 163 transitions. [2024-06-14 12:12:52,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 102 transitions, 618 flow [2024-06-14 12:12:52,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 102 transitions, 589 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:12:52,868 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 354 flow [2024-06-14 12:12:52,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-14 12:12:52,873 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-06-14 12:12:52,874 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 354 flow [2024-06-14 12:12:52,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:52,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:52,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:52,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:12:52,874 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:12:52,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:52,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1978376717, now seen corresponding path program 2 times [2024-06-14 12:12:52,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:52,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262973687] [2024-06-14 12:12:52,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:52,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:53,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:53,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262973687] [2024-06-14 12:12:53,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262973687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:53,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:53,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:12:53,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959491049] [2024-06-14 12:12:53,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:53,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:12:53,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:53,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:12:53,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:12:53,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:12:53,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 354 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:53,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:53,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:12:53,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:55,393 INFO L124 PetriNetUnfolderBase]: 9519/13218 cut-off events. [2024-06-14 12:12:55,394 INFO L125 PetriNetUnfolderBase]: For 31027/31034 co-relation queries the response was YES. [2024-06-14 12:12:55,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43322 conditions, 13218 events. 9519/13218 cut-off events. For 31027/31034 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 71994 event pairs, 4800 based on Foata normal form. 12/13181 useless extension candidates. Maximal degree in co-relation 43300. Up to 12794 conditions per place. [2024-06-14 12:12:55,451 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 67 selfloop transitions, 21 changer transitions 0/95 dead transitions. [2024-06-14 12:12:55,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 596 flow [2024-06-14 12:12:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:12:55,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:12:55,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 12:12:55,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-14 12:12:55,452 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 354 flow. Second operand 6 states and 156 transitions. [2024-06-14 12:12:55,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 596 flow [2024-06-14 12:12:55,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 95 transitions, 550 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 12:12:55,464 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 361 flow [2024-06-14 12:12:55,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-06-14 12:12:55,465 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-14 12:12:55,465 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 361 flow [2024-06-14 12:12:55,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:55,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:55,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:55,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:12:55,466 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:12:55,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:55,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1144579671, now seen corresponding path program 1 times [2024-06-14 12:12:55,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:55,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975894027] [2024-06-14 12:12:55,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:55,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:56,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:56,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975894027] [2024-06-14 12:12:56,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975894027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:56,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:56,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:12:56,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453052703] [2024-06-14 12:12:56,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:56,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:12:56,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:56,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:12:56,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:12:56,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:12:56,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:56,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:56,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:12:56,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:57,966 INFO L124 PetriNetUnfolderBase]: 9632/13394 cut-off events. [2024-06-14 12:12:57,967 INFO L125 PetriNetUnfolderBase]: For 35905/35909 co-relation queries the response was YES. [2024-06-14 12:12:57,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44410 conditions, 13394 events. 9632/13394 cut-off events. For 35905/35909 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 73067 event pairs, 5048 based on Foata normal form. 10/13356 useless extension candidates. Maximal degree in co-relation 44386. Up to 12964 conditions per place. [2024-06-14 12:12:58,082 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 90 selfloop transitions, 32 changer transitions 0/129 dead transitions. [2024-06-14 12:12:58,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 129 transitions, 828 flow [2024-06-14 12:12:58,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:12:58,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:12:58,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 12:12:58,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-14 12:12:58,094 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 361 flow. Second operand 8 states and 208 transitions. [2024-06-14 12:12:58,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 129 transitions, 828 flow [2024-06-14 12:12:58,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 129 transitions, 754 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:12:58,108 INFO L231 Difference]: Finished difference. Result has 75 places, 88 transitions, 513 flow [2024-06-14 12:12:58,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=513, PETRI_PLACES=75, PETRI_TRANSITIONS=88} [2024-06-14 12:12:58,110 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-06-14 12:12:58,110 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 88 transitions, 513 flow [2024-06-14 12:12:58,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:58,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:58,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:58,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:12:58,111 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:12:58,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:58,111 INFO L85 PathProgramCache]: Analyzing trace with hash 294901805, now seen corresponding path program 2 times [2024-06-14 12:12:58,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:58,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906991853] [2024-06-14 12:12:58,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:58,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:58,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:58,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906991853] [2024-06-14 12:12:58,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906991853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:58,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:58,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:12:58,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32623266] [2024-06-14 12:12:58,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:58,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:12:58,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:58,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:12:58,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:12:59,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:12:59,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 88 transitions, 513 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:59,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:59,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:12:59,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:00,618 INFO L124 PetriNetUnfolderBase]: 9676/13489 cut-off events. [2024-06-14 12:13:00,619 INFO L125 PetriNetUnfolderBase]: For 48832/48840 co-relation queries the response was YES. [2024-06-14 12:13:00,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48249 conditions, 13489 events. 9676/13489 cut-off events. For 48832/48840 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 74056 event pairs, 4960 based on Foata normal form. 14/13449 useless extension candidates. Maximal degree in co-relation 48223. Up to 12986 conditions per place. [2024-06-14 12:13:00,691 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 90 selfloop transitions, 34 changer transitions 0/131 dead transitions. [2024-06-14 12:13:00,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 131 transitions, 933 flow [2024-06-14 12:13:00,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:13:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:13:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 12:13:00,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-14 12:13:00,693 INFO L175 Difference]: Start difference. First operand has 75 places, 88 transitions, 513 flow. Second operand 7 states and 183 transitions. [2024-06-14 12:13:00,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 131 transitions, 933 flow [2024-06-14 12:13:00,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 131 transitions, 875 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 12:13:00,711 INFO L231 Difference]: Finished difference. Result has 79 places, 92 transitions, 590 flow [2024-06-14 12:13:00,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=590, PETRI_PLACES=79, PETRI_TRANSITIONS=92} [2024-06-14 12:13:00,712 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-06-14 12:13:00,712 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 92 transitions, 590 flow [2024-06-14 12:13:00,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:00,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:00,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:00,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:13:00,713 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:00,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:00,713 INFO L85 PathProgramCache]: Analyzing trace with hash 124204025, now seen corresponding path program 3 times [2024-06-14 12:13:00,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:00,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611645723] [2024-06-14 12:13:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:00,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:01,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:01,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:01,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611645723] [2024-06-14 12:13:01,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611645723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:01,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:01,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:13:01,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794346437] [2024-06-14 12:13:01,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:01,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:13:01,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:01,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:13:01,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:13:01,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:13:01,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 92 transitions, 590 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:01,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:01,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:13:01,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:03,233 INFO L124 PetriNetUnfolderBase]: 9720/13562 cut-off events. [2024-06-14 12:13:03,233 INFO L125 PetriNetUnfolderBase]: For 63927/63929 co-relation queries the response was YES. [2024-06-14 12:13:03,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51909 conditions, 13562 events. 9720/13562 cut-off events. For 63927/63929 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 74347 event pairs, 4518 based on Foata normal form. 6/13514 useless extension candidates. Maximal degree in co-relation 51882. Up to 12855 conditions per place. [2024-06-14 12:13:03,321 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 83 selfloop transitions, 50 changer transitions 0/140 dead transitions. [2024-06-14 12:13:03,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 140 transitions, 1122 flow [2024-06-14 12:13:03,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:13:03,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:13:03,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-14 12:13:03,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121293800539084 [2024-06-14 12:13:03,323 INFO L175 Difference]: Start difference. First operand has 79 places, 92 transitions, 590 flow. Second operand 7 states and 190 transitions. [2024-06-14 12:13:03,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 140 transitions, 1122 flow [2024-06-14 12:13:03,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 140 transitions, 1003 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 12:13:03,353 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 696 flow [2024-06-14 12:13:03,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=696, PETRI_PLACES=81, PETRI_TRANSITIONS=100} [2024-06-14 12:13:03,353 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-14 12:13:03,353 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 696 flow [2024-06-14 12:13:03,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:03,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:03,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:03,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:13:03,354 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:03,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:03,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1916898793, now seen corresponding path program 4 times [2024-06-14 12:13:03,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:03,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819100496] [2024-06-14 12:13:03,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:03,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:04,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:04,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819100496] [2024-06-14 12:13:04,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819100496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:04,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:04,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:13:04,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669382119] [2024-06-14 12:13:04,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:04,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:13:04,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:04,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:13:04,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:13:04,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:13:04,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 100 transitions, 696 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:04,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:04,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:13:04,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:06,110 INFO L124 PetriNetUnfolderBase]: 9702/13540 cut-off events. [2024-06-14 12:13:06,111 INFO L125 PetriNetUnfolderBase]: For 65001/65006 co-relation queries the response was YES. [2024-06-14 12:13:06,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51774 conditions, 13540 events. 9702/13540 cut-off events. For 65001/65006 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 74266 event pairs, 4526 based on Foata normal form. 6/13490 useless extension candidates. Maximal degree in co-relation 51746. Up to 12840 conditions per place. [2024-06-14 12:13:06,186 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 77 selfloop transitions, 50 changer transitions 0/134 dead transitions. [2024-06-14 12:13:06,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 134 transitions, 1054 flow [2024-06-14 12:13:06,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:13:06,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:13:06,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 12:13:06,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-14 12:13:06,188 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 696 flow. Second operand 7 states and 183 transitions. [2024-06-14 12:13:06,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 134 transitions, 1054 flow [2024-06-14 12:13:06,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 134 transitions, 971 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 12:13:06,214 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 724 flow [2024-06-14 12:13:06,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=724, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-14 12:13:06,214 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-06-14 12:13:06,215 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 724 flow [2024-06-14 12:13:06,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:06,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:06,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:06,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:13:06,215 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:06,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:06,216 INFO L85 PathProgramCache]: Analyzing trace with hash 301581809, now seen corresponding path program 1 times [2024-06-14 12:13:06,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:06,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014235514] [2024-06-14 12:13:06,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:06,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:07,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:07,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:07,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014235514] [2024-06-14 12:13:07,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014235514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:07,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:07,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:13:07,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524205030] [2024-06-14 12:13:07,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:07,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:13:07,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:07,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:13:07,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:13:07,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:13:07,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 724 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:07,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:07,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:13:07,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:09,156 INFO L124 PetriNetUnfolderBase]: 8292/11735 cut-off events. [2024-06-14 12:13:09,156 INFO L125 PetriNetUnfolderBase]: For 63026/63028 co-relation queries the response was YES. [2024-06-14 12:13:09,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46133 conditions, 11735 events. 8292/11735 cut-off events. For 63026/63028 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 65245 event pairs, 3860 based on Foata normal form. 6/11599 useless extension candidates. Maximal degree in co-relation 46103. Up to 11239 conditions per place. [2024-06-14 12:13:09,235 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 114 selfloop transitions, 17 changer transitions 0/139 dead transitions. [2024-06-14 12:13:09,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 139 transitions, 1151 flow [2024-06-14 12:13:09,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:13:09,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:13:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 12:13:09,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-14 12:13:09,236 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 724 flow. Second operand 7 states and 182 transitions. [2024-06-14 12:13:09,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 139 transitions, 1151 flow [2024-06-14 12:13:09,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 139 transitions, 1010 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:13:09,278 INFO L231 Difference]: Finished difference. Result has 87 places, 107 transitions, 705 flow [2024-06-14 12:13:09,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=705, PETRI_PLACES=87, PETRI_TRANSITIONS=107} [2024-06-14 12:13:09,278 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-14 12:13:09,279 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 107 transitions, 705 flow [2024-06-14 12:13:09,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:09,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:09,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:09,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:13:09,279 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:09,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:09,280 INFO L85 PathProgramCache]: Analyzing trace with hash -336329912, now seen corresponding path program 1 times [2024-06-14 12:13:09,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:09,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116214194] [2024-06-14 12:13:09,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:09,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:10,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:10,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116214194] [2024-06-14 12:13:10,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116214194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:10,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:10,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:13:10,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112255584] [2024-06-14 12:13:10,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:10,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:13:10,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:10,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:13:10,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:13:10,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-14 12:13:10,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 705 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:10,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:10,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-14 12:13:10,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:11,449 INFO L124 PetriNetUnfolderBase]: 7764/11464 cut-off events. [2024-06-14 12:13:11,450 INFO L125 PetriNetUnfolderBase]: For 71777/71794 co-relation queries the response was YES. [2024-06-14 12:13:11,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47127 conditions, 11464 events. 7764/11464 cut-off events. For 71777/71794 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 68153 event pairs, 3930 based on Foata normal form. 17/11311 useless extension candidates. Maximal degree in co-relation 47095. Up to 10613 conditions per place. [2024-06-14 12:13:11,524 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 102 selfloop transitions, 10 changer transitions 0/125 dead transitions. [2024-06-14 12:13:11,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 125 transitions, 1009 flow [2024-06-14 12:13:11,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:13:11,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:13:11,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-14 12:13:11,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981132075471698 [2024-06-14 12:13:11,525 INFO L175 Difference]: Start difference. First operand has 87 places, 107 transitions, 705 flow. Second operand 5 states and 132 transitions. [2024-06-14 12:13:11,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 125 transitions, 1009 flow [2024-06-14 12:13:11,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 125 transitions, 949 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 12:13:11,570 INFO L231 Difference]: Finished difference. Result has 88 places, 111 transitions, 718 flow [2024-06-14 12:13:11,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=718, PETRI_PLACES=88, PETRI_TRANSITIONS=111} [2024-06-14 12:13:11,571 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-06-14 12:13:11,571 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 111 transitions, 718 flow [2024-06-14 12:13:11,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:11,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:11,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:11,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:13:11,572 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:11,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:11,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1836290886, now seen corresponding path program 1 times [2024-06-14 12:13:11,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:11,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307523671] [2024-06-14 12:13:11,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:11,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:12,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:12,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307523671] [2024-06-14 12:13:12,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307523671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:12,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:12,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:13:12,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523074117] [2024-06-14 12:13:12,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:12,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:13:12,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:12,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:13:12,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:13:12,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:13:12,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 111 transitions, 718 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:12,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:12,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:13:12,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:13,907 INFO L124 PetriNetUnfolderBase]: 9072/12924 cut-off events. [2024-06-14 12:13:13,908 INFO L125 PetriNetUnfolderBase]: For 98332/98349 co-relation queries the response was YES. [2024-06-14 12:13:13,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56737 conditions, 12924 events. 9072/12924 cut-off events. For 98332/98349 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 73551 event pairs, 4678 based on Foata normal form. 18/12922 useless extension candidates. Maximal degree in co-relation 56704. Up to 12344 conditions per place. [2024-06-14 12:13:13,982 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 111 selfloop transitions, 22 changer transitions 0/145 dead transitions. [2024-06-14 12:13:13,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 145 transitions, 1200 flow [2024-06-14 12:13:13,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:13:13,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:13:13,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 12:13:13,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-14 12:13:13,984 INFO L175 Difference]: Start difference. First operand has 88 places, 111 transitions, 718 flow. Second operand 6 states and 156 transitions. [2024-06-14 12:13:13,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 145 transitions, 1200 flow [2024-06-14 12:13:14,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 145 transitions, 1157 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 12:13:14,025 INFO L231 Difference]: Finished difference. Result has 93 places, 125 transitions, 875 flow [2024-06-14 12:13:14,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=875, PETRI_PLACES=93, PETRI_TRANSITIONS=125} [2024-06-14 12:13:14,026 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 37 predicate places. [2024-06-14 12:13:14,026 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 125 transitions, 875 flow [2024-06-14 12:13:14,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:14,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:14,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:14,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:13:14,027 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:14,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:14,027 INFO L85 PathProgramCache]: Analyzing trace with hash 2042536922, now seen corresponding path program 1 times [2024-06-14 12:13:14,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:14,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935172717] [2024-06-14 12:13:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:14,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:15,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:15,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935172717] [2024-06-14 12:13:15,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935172717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:15,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:15,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:15,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803011617] [2024-06-14 12:13:15,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:15,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:15,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:15,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:15,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:15,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:13:15,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 125 transitions, 875 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:15,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:15,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:13:15,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:17,314 INFO L124 PetriNetUnfolderBase]: 10624/14865 cut-off events. [2024-06-14 12:13:17,315 INFO L125 PetriNetUnfolderBase]: For 142571/142677 co-relation queries the response was YES. [2024-06-14 12:13:17,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69955 conditions, 14865 events. 10624/14865 cut-off events. For 142571/142677 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 82861 event pairs, 4133 based on Foata normal form. 32/14812 useless extension candidates. Maximal degree in co-relation 69919. Up to 13725 conditions per place. [2024-06-14 12:13:17,402 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 143 selfloop transitions, 41 changer transitions 0/194 dead transitions. [2024-06-14 12:13:17,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 194 transitions, 1621 flow [2024-06-14 12:13:17,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:13:17,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:13:17,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-14 12:13:17,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2024-06-14 12:13:17,412 INFO L175 Difference]: Start difference. First operand has 93 places, 125 transitions, 875 flow. Second operand 9 states and 240 transitions. [2024-06-14 12:13:17,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 194 transitions, 1621 flow [2024-06-14 12:13:17,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 194 transitions, 1585 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-14 12:13:17,478 INFO L231 Difference]: Finished difference. Result has 101 places, 129 transitions, 1018 flow [2024-06-14 12:13:17,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1018, PETRI_PLACES=101, PETRI_TRANSITIONS=129} [2024-06-14 12:13:17,479 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-06-14 12:13:17,479 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 129 transitions, 1018 flow [2024-06-14 12:13:17,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:17,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:17,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:17,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:13:17,479 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:17,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:17,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1017070856, now seen corresponding path program 2 times [2024-06-14 12:13:17,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:17,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909939782] [2024-06-14 12:13:17,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:17,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:18,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:18,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909939782] [2024-06-14 12:13:18,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909939782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:18,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:18,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:18,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100549720] [2024-06-14 12:13:18,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:18,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:18,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:18,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:18,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:18,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:13:18,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 129 transitions, 1018 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:18,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:18,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:13:18,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:20,620 INFO L124 PetriNetUnfolderBase]: 10555/14760 cut-off events. [2024-06-14 12:13:20,620 INFO L125 PetriNetUnfolderBase]: For 160127/160233 co-relation queries the response was YES. [2024-06-14 12:13:20,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71404 conditions, 14760 events. 10555/14760 cut-off events. For 160127/160233 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 81940 event pairs, 4857 based on Foata normal form. 38/14711 useless extension candidates. Maximal degree in co-relation 71365. Up to 13907 conditions per place. [2024-06-14 12:13:20,711 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 134 selfloop transitions, 36 changer transitions 0/180 dead transitions. [2024-06-14 12:13:20,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 180 transitions, 1538 flow [2024-06-14 12:13:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:20,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:20,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-14 12:13:20,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49528301886792453 [2024-06-14 12:13:20,713 INFO L175 Difference]: Start difference. First operand has 101 places, 129 transitions, 1018 flow. Second operand 8 states and 210 transitions. [2024-06-14 12:13:20,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 180 transitions, 1538 flow [2024-06-14 12:13:20,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 180 transitions, 1461 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 12:13:20,831 INFO L231 Difference]: Finished difference. Result has 104 places, 129 transitions, 1025 flow [2024-06-14 12:13:20,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1025, PETRI_PLACES=104, PETRI_TRANSITIONS=129} [2024-06-14 12:13:20,833 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2024-06-14 12:13:20,833 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 129 transitions, 1025 flow [2024-06-14 12:13:20,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:20,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:20,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:20,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:13:20,834 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:20,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:20,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2134282244, now seen corresponding path program 3 times [2024-06-14 12:13:20,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:20,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180204204] [2024-06-14 12:13:20,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:20,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:21,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:21,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180204204] [2024-06-14 12:13:21,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180204204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:21,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:21,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:21,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319456761] [2024-06-14 12:13:21,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:21,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:21,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:21,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:21,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:21,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:13:21,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 129 transitions, 1025 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:21,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:21,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:13:21,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:24,141 INFO L124 PetriNetUnfolderBase]: 10729/15003 cut-off events. [2024-06-14 12:13:24,141 INFO L125 PetriNetUnfolderBase]: For 176134/176236 co-relation queries the response was YES. [2024-06-14 12:13:24,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73664 conditions, 15003 events. 10729/15003 cut-off events. For 176134/176236 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 83478 event pairs, 4525 based on Foata normal form. 30/14932 useless extension candidates. Maximal degree in co-relation 73623. Up to 14007 conditions per place. [2024-06-14 12:13:24,263 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 114 selfloop transitions, 55 changer transitions 0/179 dead transitions. [2024-06-14 12:13:24,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 179 transitions, 1573 flow [2024-06-14 12:13:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:24,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:24,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-14 12:13:24,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-14 12:13:24,266 INFO L175 Difference]: Start difference. First operand has 104 places, 129 transitions, 1025 flow. Second operand 8 states and 214 transitions. [2024-06-14 12:13:24,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 179 transitions, 1573 flow [2024-06-14 12:13:24,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 179 transitions, 1491 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:13:24,384 INFO L231 Difference]: Finished difference. Result has 105 places, 131 transitions, 1113 flow [2024-06-14 12:13:24,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1113, PETRI_PLACES=105, PETRI_TRANSITIONS=131} [2024-06-14 12:13:24,385 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-06-14 12:13:24,385 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 131 transitions, 1113 flow [2024-06-14 12:13:24,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:24,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:24,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:24,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:13:24,386 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:24,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:24,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2134097546, now seen corresponding path program 1 times [2024-06-14 12:13:24,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:24,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60999040] [2024-06-14 12:13:24,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:24,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:25,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:25,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60999040] [2024-06-14 12:13:25,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60999040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:25,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:25,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:25,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293860661] [2024-06-14 12:13:25,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:25,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:25,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:25,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:25,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:25,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:13:25,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 131 transitions, 1113 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:25,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:25,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:13:25,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:27,885 INFO L124 PetriNetUnfolderBase]: 10906/15247 cut-off events. [2024-06-14 12:13:27,885 INFO L125 PetriNetUnfolderBase]: For 199461/199569 co-relation queries the response was YES. [2024-06-14 12:13:27,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76792 conditions, 15247 events. 10906/15247 cut-off events. For 199461/199569 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 85049 event pairs, 4669 based on Foata normal form. 14/15145 useless extension candidates. Maximal degree in co-relation 76750. Up to 14606 conditions per place. [2024-06-14 12:13:27,976 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 138 selfloop transitions, 35 changer transitions 0/183 dead transitions. [2024-06-14 12:13:27,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 183 transitions, 1692 flow [2024-06-14 12:13:27,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:27,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:27,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 12:13:27,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-14 12:13:27,978 INFO L175 Difference]: Start difference. First operand has 105 places, 131 transitions, 1113 flow. Second operand 8 states and 207 transitions. [2024-06-14 12:13:27,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 183 transitions, 1692 flow [2024-06-14 12:13:28,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 183 transitions, 1558 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 12:13:28,099 INFO L231 Difference]: Finished difference. Result has 108 places, 138 transitions, 1156 flow [2024-06-14 12:13:28,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1156, PETRI_PLACES=108, PETRI_TRANSITIONS=138} [2024-06-14 12:13:28,100 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-14 12:13:28,100 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 138 transitions, 1156 flow [2024-06-14 12:13:28,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:28,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:28,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:28,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:13:28,101 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:28,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:28,101 INFO L85 PathProgramCache]: Analyzing trace with hash -342788621, now seen corresponding path program 1 times [2024-06-14 12:13:28,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:28,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072473286] [2024-06-14 12:13:28,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:28,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:28,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:28,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072473286] [2024-06-14 12:13:28,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072473286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:28,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:28,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:13:28,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629073705] [2024-06-14 12:13:28,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:28,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:13:28,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:28,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:13:28,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:13:28,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:13:28,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 138 transitions, 1156 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:28,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:28,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:13:28,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:30,605 INFO L124 PetriNetUnfolderBase]: 10311/14649 cut-off events. [2024-06-14 12:13:30,606 INFO L125 PetriNetUnfolderBase]: For 219786/219917 co-relation queries the response was YES. [2024-06-14 12:13:30,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77221 conditions, 14649 events. 10311/14649 cut-off events. For 219786/219917 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 84297 event pairs, 4608 based on Foata normal form. 19/14529 useless extension candidates. Maximal degree in co-relation 77177. Up to 13853 conditions per place. [2024-06-14 12:13:30,722 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 120 selfloop transitions, 28 changer transitions 0/165 dead transitions. [2024-06-14 12:13:30,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 165 transitions, 1578 flow [2024-06-14 12:13:30,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:13:30,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:13:30,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 12:13:30,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-14 12:13:30,723 INFO L175 Difference]: Start difference. First operand has 108 places, 138 transitions, 1156 flow. Second operand 6 states and 156 transitions. [2024-06-14 12:13:30,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 165 transitions, 1578 flow [2024-06-14 12:13:30,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 165 transitions, 1464 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 12:13:30,846 INFO L231 Difference]: Finished difference. Result has 109 places, 142 transitions, 1173 flow [2024-06-14 12:13:30,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1173, PETRI_PLACES=109, PETRI_TRANSITIONS=142} [2024-06-14 12:13:30,847 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 53 predicate places. [2024-06-14 12:13:30,847 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 142 transitions, 1173 flow [2024-06-14 12:13:30,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:30,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:30,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:30,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:13:30,848 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:30,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:30,848 INFO L85 PathProgramCache]: Analyzing trace with hash -2127788912, now seen corresponding path program 4 times [2024-06-14 12:13:30,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:30,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350105442] [2024-06-14 12:13:30,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:30,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:31,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:31,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350105442] [2024-06-14 12:13:31,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350105442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:31,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:31,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:31,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529482250] [2024-06-14 12:13:31,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:31,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:31,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:31,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:31,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:31,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:13:31,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 142 transitions, 1173 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:31,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:31,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:13:31,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:33,861 INFO L124 PetriNetUnfolderBase]: 11000/15384 cut-off events. [2024-06-14 12:13:33,861 INFO L125 PetriNetUnfolderBase]: For 250441/250578 co-relation queries the response was YES. [2024-06-14 12:13:33,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83612 conditions, 15384 events. 11000/15384 cut-off events. For 250441/250578 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 85600 event pairs, 4509 based on Foata normal form. 30/15292 useless extension candidates. Maximal degree in co-relation 83567. Up to 14388 conditions per place. [2024-06-14 12:13:33,999 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 123 selfloop transitions, 57 changer transitions 0/190 dead transitions. [2024-06-14 12:13:33,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 190 transitions, 1757 flow [2024-06-14 12:13:34,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:34,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:34,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-14 12:13:34,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49528301886792453 [2024-06-14 12:13:34,001 INFO L175 Difference]: Start difference. First operand has 109 places, 142 transitions, 1173 flow. Second operand 8 states and 210 transitions. [2024-06-14 12:13:34,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 190 transitions, 1757 flow [2024-06-14 12:13:34,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 190 transitions, 1668 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 12:13:34,192 INFO L231 Difference]: Finished difference. Result has 113 places, 144 transitions, 1268 flow [2024-06-14 12:13:34,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1268, PETRI_PLACES=113, PETRI_TRANSITIONS=144} [2024-06-14 12:13:34,193 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-14 12:13:34,193 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 144 transitions, 1268 flow [2024-06-14 12:13:34,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:34,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:34,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:34,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:13:34,194 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:34,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:34,194 INFO L85 PathProgramCache]: Analyzing trace with hash 2048768848, now seen corresponding path program 2 times [2024-06-14 12:13:34,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:34,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530957533] [2024-06-14 12:13:34,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:34,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:35,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:35,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530957533] [2024-06-14 12:13:35,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530957533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:35,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:35,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:35,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561018849] [2024-06-14 12:13:35,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:35,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:35,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:35,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:35,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:35,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:13:35,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 144 transitions, 1268 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:35,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:35,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:13:35,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:37,440 INFO L124 PetriNetUnfolderBase]: 11058/15495 cut-off events. [2024-06-14 12:13:37,440 INFO L125 PetriNetUnfolderBase]: For 275644/275791 co-relation queries the response was YES. [2024-06-14 12:13:37,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86300 conditions, 15495 events. 11058/15495 cut-off events. For 275644/275791 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 86558 event pairs, 4661 based on Foata normal form. 20/15395 useless extension candidates. Maximal degree in co-relation 86254. Up to 14821 conditions per place. [2024-06-14 12:13:37,579 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 144 selfloop transitions, 43 changer transitions 0/197 dead transitions. [2024-06-14 12:13:37,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 197 transitions, 1912 flow [2024-06-14 12:13:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 12:13:37,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47877358490566035 [2024-06-14 12:13:37,581 INFO L175 Difference]: Start difference. First operand has 113 places, 144 transitions, 1268 flow. Second operand 8 states and 203 transitions. [2024-06-14 12:13:37,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 197 transitions, 1912 flow [2024-06-14 12:13:37,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 197 transitions, 1758 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:13:37,762 INFO L231 Difference]: Finished difference. Result has 116 places, 155 transitions, 1362 flow [2024-06-14 12:13:37,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1128, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1362, PETRI_PLACES=116, PETRI_TRANSITIONS=155} [2024-06-14 12:13:37,763 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 60 predicate places. [2024-06-14 12:13:37,763 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 155 transitions, 1362 flow [2024-06-14 12:13:37,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:37,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:37,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:37,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:13:37,764 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:37,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:37,765 INFO L85 PathProgramCache]: Analyzing trace with hash -288218036, now seen corresponding path program 3 times [2024-06-14 12:13:37,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:37,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183349238] [2024-06-14 12:13:37,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:37,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:38,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:38,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:38,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183349238] [2024-06-14 12:13:38,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183349238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:38,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:38,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:38,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680350507] [2024-06-14 12:13:38,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:38,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:38,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:38,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:38,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:39,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:13:39,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 155 transitions, 1362 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:39,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:39,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:13:39,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:40,984 INFO L124 PetriNetUnfolderBase]: 11094/15547 cut-off events. [2024-06-14 12:13:40,985 INFO L125 PetriNetUnfolderBase]: For 303174/303321 co-relation queries the response was YES. [2024-06-14 12:13:41,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89409 conditions, 15547 events. 11094/15547 cut-off events. For 303174/303321 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 86982 event pairs, 4334 based on Foata normal form. 20/15447 useless extension candidates. Maximal degree in co-relation 89361. Up to 14736 conditions per place. [2024-06-14 12:13:41,134 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 143 selfloop transitions, 54 changer transitions 0/207 dead transitions. [2024-06-14 12:13:41,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 207 transitions, 2156 flow [2024-06-14 12:13:41,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:41,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:41,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 12:13:41,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-14 12:13:41,136 INFO L175 Difference]: Start difference. First operand has 116 places, 155 transitions, 1362 flow. Second operand 8 states and 207 transitions. [2024-06-14 12:13:41,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 207 transitions, 2156 flow [2024-06-14 12:13:41,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 207 transitions, 2044 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-14 12:13:41,338 INFO L231 Difference]: Finished difference. Result has 121 places, 161 transitions, 1518 flow [2024-06-14 12:13:41,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1518, PETRI_PLACES=121, PETRI_TRANSITIONS=161} [2024-06-14 12:13:41,338 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 65 predicate places. [2024-06-14 12:13:41,339 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 161 transitions, 1518 flow [2024-06-14 12:13:41,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:41,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:41,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:41,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:13:41,339 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:41,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:41,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1968458412, now seen corresponding path program 4 times [2024-06-14 12:13:41,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:41,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131873196] [2024-06-14 12:13:41,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:41,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:42,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:42,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131873196] [2024-06-14 12:13:42,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131873196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:42,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:42,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:42,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611938137] [2024-06-14 12:13:42,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:42,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:42,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:42,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:42,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:42,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:13:42,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 161 transitions, 1518 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:42,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:42,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:13:42,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:44,460 INFO L124 PetriNetUnfolderBase]: 11079/15542 cut-off events. [2024-06-14 12:13:44,460 INFO L125 PetriNetUnfolderBase]: For 329556/329703 co-relation queries the response was YES. [2024-06-14 12:13:44,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90204 conditions, 15542 events. 11079/15542 cut-off events. For 329556/329703 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 86958 event pairs, 4658 based on Foata normal form. 20/15442 useless extension candidates. Maximal degree in co-relation 90155. Up to 14852 conditions per place. [2024-06-14 12:13:44,590 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 151 selfloop transitions, 42 changer transitions 0/203 dead transitions. [2024-06-14 12:13:44,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 203 transitions, 2044 flow [2024-06-14 12:13:44,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:44,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:44,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 12:13:44,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-14 12:13:44,592 INFO L175 Difference]: Start difference. First operand has 121 places, 161 transitions, 1518 flow. Second operand 8 states and 204 transitions. [2024-06-14 12:13:44,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 203 transitions, 2044 flow [2024-06-14 12:13:44,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 203 transitions, 1882 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-14 12:13:44,876 INFO L231 Difference]: Finished difference. Result has 125 places, 161 transitions, 1450 flow [2024-06-14 12:13:44,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1450, PETRI_PLACES=125, PETRI_TRANSITIONS=161} [2024-06-14 12:13:44,876 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-14 12:13:44,876 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 161 transitions, 1450 flow [2024-06-14 12:13:44,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:44,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:44,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:44,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:13:44,877 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:44,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:44,877 INFO L85 PathProgramCache]: Analyzing trace with hash -342402671, now seen corresponding path program 2 times [2024-06-14 12:13:44,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:44,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726667843] [2024-06-14 12:13:44,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:44,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:45,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:45,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726667843] [2024-06-14 12:13:45,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726667843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:45,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:45,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:13:45,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792746823] [2024-06-14 12:13:45,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:45,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:13:45,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:45,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:13:45,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:13:45,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:13:45,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 161 transitions, 1450 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:45,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:45,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:13:45,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:47,495 INFO L124 PetriNetUnfolderBase]: 10441/14858 cut-off events. [2024-06-14 12:13:47,496 INFO L125 PetriNetUnfolderBase]: For 344316/344463 co-relation queries the response was YES. [2024-06-14 12:13:47,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87289 conditions, 14858 events. 10441/14858 cut-off events. For 344316/344463 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 85708 event pairs, 4612 based on Foata normal form. 17/14723 useless extension candidates. Maximal degree in co-relation 87238. Up to 14015 conditions per place. [2024-06-14 12:13:47,627 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 126 selfloop transitions, 35 changer transitions 0/183 dead transitions. [2024-06-14 12:13:47,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 183 transitions, 1896 flow [2024-06-14 12:13:47,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:13:47,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:13:47,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 12:13:47,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2024-06-14 12:13:47,628 INFO L175 Difference]: Start difference. First operand has 125 places, 161 transitions, 1450 flow. Second operand 6 states and 152 transitions. [2024-06-14 12:13:47,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 183 transitions, 1896 flow [2024-06-14 12:13:47,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 183 transitions, 1756 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 12:13:47,842 INFO L231 Difference]: Finished difference. Result has 122 places, 165 transitions, 1465 flow [2024-06-14 12:13:47,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1465, PETRI_PLACES=122, PETRI_TRANSITIONS=165} [2024-06-14 12:13:47,843 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-06-14 12:13:47,843 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 165 transitions, 1465 flow [2024-06-14 12:13:47,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:47,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:47,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:47,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:13:47,844 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:47,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:47,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1096162649, now seen corresponding path program 1 times [2024-06-14 12:13:47,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:47,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640546219] [2024-06-14 12:13:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:47,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:48,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:48,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640546219] [2024-06-14 12:13:48,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640546219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:48,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:48,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:13:48,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481659099] [2024-06-14 12:13:48,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:48,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:13:48,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:48,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:13:48,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:13:48,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:13:48,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 165 transitions, 1465 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:48,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:48,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:13:48,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:50,348 INFO L124 PetriNetUnfolderBase]: 9705/13999 cut-off events. [2024-06-14 12:13:50,349 INFO L125 PetriNetUnfolderBase]: For 323630/323790 co-relation queries the response was YES. [2024-06-14 12:13:50,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83803 conditions, 13999 events. 9705/13999 cut-off events. For 323630/323790 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 81595 event pairs, 3906 based on Foata normal form. 4/13822 useless extension candidates. Maximal degree in co-relation 83753. Up to 13174 conditions per place. [2024-06-14 12:13:50,466 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 166 selfloop transitions, 14 changer transitions 0/191 dead transitions. [2024-06-14 12:13:50,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 191 transitions, 1965 flow [2024-06-14 12:13:50,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:13:50,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:13:50,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 12:13:50,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-14 12:13:50,467 INFO L175 Difference]: Start difference. First operand has 122 places, 165 transitions, 1465 flow. Second operand 6 states and 154 transitions. [2024-06-14 12:13:50,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 191 transitions, 1965 flow [2024-06-14 12:13:50,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 191 transitions, 1848 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 12:13:50,667 INFO L231 Difference]: Finished difference. Result has 124 places, 169 transitions, 1463 flow [2024-06-14 12:13:50,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1463, PETRI_PLACES=124, PETRI_TRANSITIONS=169} [2024-06-14 12:13:50,668 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 68 predicate places. [2024-06-14 12:13:50,668 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 169 transitions, 1463 flow [2024-06-14 12:13:50,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:50,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:50,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:50,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:13:50,668 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:50,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:50,669 INFO L85 PathProgramCache]: Analyzing trace with hash -342396719, now seen corresponding path program 2 times [2024-06-14 12:13:50,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:50,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686663172] [2024-06-14 12:13:50,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:50,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:51,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:51,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:51,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686663172] [2024-06-14 12:13:51,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686663172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:51,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:51,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:13:51,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665978171] [2024-06-14 12:13:51,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:51,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:13:51,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:51,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:13:51,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:13:51,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:13:51,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 169 transitions, 1463 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:51,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:51,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:13:51,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:53,295 INFO L124 PetriNetUnfolderBase]: 9714/14018 cut-off events. [2024-06-14 12:13:53,296 INFO L125 PetriNetUnfolderBase]: For 350551/350731 co-relation queries the response was YES. [2024-06-14 12:13:53,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86637 conditions, 14018 events. 9714/14018 cut-off events. For 350551/350731 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 81804 event pairs, 3913 based on Foata normal form. 8/13845 useless extension candidates. Maximal degree in co-relation 86586. Up to 13159 conditions per place. [2024-06-14 12:13:53,402 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 161 selfloop transitions, 21 changer transitions 0/193 dead transitions. [2024-06-14 12:13:53,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 193 transitions, 1969 flow [2024-06-14 12:13:53,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:13:53,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:13:53,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 12:13:53,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-14 12:13:53,403 INFO L175 Difference]: Start difference. First operand has 124 places, 169 transitions, 1463 flow. Second operand 6 states and 154 transitions. [2024-06-14 12:13:53,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 193 transitions, 1969 flow [2024-06-14 12:13:53,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 193 transitions, 1884 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 12:13:53,597 INFO L231 Difference]: Finished difference. Result has 126 places, 173 transitions, 1515 flow [2024-06-14 12:13:53,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1515, PETRI_PLACES=126, PETRI_TRANSITIONS=173} [2024-06-14 12:13:53,598 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 70 predicate places. [2024-06-14 12:13:53,598 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 173 transitions, 1515 flow [2024-06-14 12:13:53,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:53,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:53,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:53,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:13:53,599 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:53,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:53,599 INFO L85 PathProgramCache]: Analyzing trace with hash -342388783, now seen corresponding path program 1 times [2024-06-14 12:13:53,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:53,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182757781] [2024-06-14 12:13:53,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:53,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:54,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:54,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182757781] [2024-06-14 12:13:54,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182757781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:54,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:54,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:13:54,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450871873] [2024-06-14 12:13:54,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:54,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:13:54,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:54,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:13:54,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:13:54,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:13:54,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 173 transitions, 1515 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:54,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:54,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:13:54,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:56,607 INFO L124 PetriNetUnfolderBase]: 9828/14140 cut-off events. [2024-06-14 12:13:56,608 INFO L125 PetriNetUnfolderBase]: For 419142/419159 co-relation queries the response was YES. [2024-06-14 12:13:56,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92109 conditions, 14140 events. 9828/14140 cut-off events. For 419142/419159 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 82332 event pairs, 4354 based on Foata normal form. 18/14135 useless extension candidates. Maximal degree in co-relation 92057. Up to 13290 conditions per place. [2024-06-14 12:13:56,715 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 156 selfloop transitions, 27 changer transitions 0/202 dead transitions. [2024-06-14 12:13:56,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 202 transitions, 2129 flow [2024-06-14 12:13:56,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:13:56,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:13:56,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 12:13:56,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48247978436657685 [2024-06-14 12:13:56,716 INFO L175 Difference]: Start difference. First operand has 126 places, 173 transitions, 1515 flow. Second operand 7 states and 179 transitions. [2024-06-14 12:13:56,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 202 transitions, 2129 flow [2024-06-14 12:13:56,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 202 transitions, 2022 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-14 12:13:56,897 INFO L231 Difference]: Finished difference. Result has 129 places, 178 transitions, 1562 flow [2024-06-14 12:13:56,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1408, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1562, PETRI_PLACES=129, PETRI_TRANSITIONS=178} [2024-06-14 12:13:56,898 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-06-14 12:13:56,898 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 178 transitions, 1562 flow [2024-06-14 12:13:56,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:56,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:56,898 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 12:13:56,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:13:56,899 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:56,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:56,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1732513484, now seen corresponding path program 1 times [2024-06-14 12:13:56,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:56,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328454148] [2024-06-14 12:13:56,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:56,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:57,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:57,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328454148] [2024-06-14 12:13:57,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328454148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:57,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:57,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:13:57,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199242696] [2024-06-14 12:13:57,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:57,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:13:57,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:57,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:13:57,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:13:58,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:13:58,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 178 transitions, 1562 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:58,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:58,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:13:58,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:00,634 INFO L124 PetriNetUnfolderBase]: 11443/16054 cut-off events. [2024-06-14 12:14:00,634 INFO L125 PetriNetUnfolderBase]: For 529754/529825 co-relation queries the response was YES. [2024-06-14 12:14:00,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109830 conditions, 16054 events. 11443/16054 cut-off events. For 529754/529825 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 89699 event pairs, 4665 based on Foata normal form. 19/15948 useless extension candidates. Maximal degree in co-relation 109777. Up to 14677 conditions per place. [2024-06-14 12:14:00,803 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 159 selfloop transitions, 79 changer transitions 0/249 dead transitions. [2024-06-14 12:14:00,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 249 transitions, 2441 flow [2024-06-14 12:14:00,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:14:00,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:14:00,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-14 12:14:00,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4989517819706499 [2024-06-14 12:14:00,805 INFO L175 Difference]: Start difference. First operand has 129 places, 178 transitions, 1562 flow. Second operand 9 states and 238 transitions. [2024-06-14 12:14:00,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 249 transitions, 2441 flow [2024-06-14 12:14:01,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 249 transitions, 2323 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 12:14:01,105 INFO L231 Difference]: Finished difference. Result has 135 places, 194 transitions, 1862 flow [2024-06-14 12:14:01,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1862, PETRI_PLACES=135, PETRI_TRANSITIONS=194} [2024-06-14 12:14:01,105 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-14 12:14:01,106 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 194 transitions, 1862 flow [2024-06-14 12:14:01,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:01,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:01,106 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 12:14:01,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:14:01,106 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:14:01,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:01,107 INFO L85 PathProgramCache]: Analyzing trace with hash 445677363, now seen corresponding path program 1 times [2024-06-14 12:14:01,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:01,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729662879] [2024-06-14 12:14:01,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:01,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:02,049 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 12:14:02,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:02,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729662879] [2024-06-14 12:14:02,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729662879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:02,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:02,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:02,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599418154] [2024-06-14 12:14:02,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:02,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:02,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:02,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:02,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:02,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:14:02,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 194 transitions, 1862 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:02,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:02,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:14:02,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:04,702 INFO L124 PetriNetUnfolderBase]: 11468/16041 cut-off events. [2024-06-14 12:14:04,702 INFO L125 PetriNetUnfolderBase]: For 567980/568023 co-relation queries the response was YES. [2024-06-14 12:14:04,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113269 conditions, 16041 events. 11468/16041 cut-off events. For 567980/568023 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 90040 event pairs, 4934 based on Foata normal form. 21/16020 useless extension candidates. Maximal degree in co-relation 113213. Up to 15429 conditions per place. [2024-06-14 12:14:04,836 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 181 selfloop transitions, 39 changer transitions 0/238 dead transitions. [2024-06-14 12:14:04,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 238 transitions, 2758 flow [2024-06-14 12:14:04,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:04,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:04,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 12:14:04,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48517520215633425 [2024-06-14 12:14:04,838 INFO L175 Difference]: Start difference. First operand has 135 places, 194 transitions, 1862 flow. Second operand 7 states and 180 transitions. [2024-06-14 12:14:04,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 238 transitions, 2758 flow [2024-06-14 12:14:05,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 238 transitions, 2596 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:05,085 INFO L231 Difference]: Finished difference. Result has 140 places, 208 transitions, 2047 flow [2024-06-14 12:14:05,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2047, PETRI_PLACES=140, PETRI_TRANSITIONS=208} [2024-06-14 12:14:05,086 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-06-14 12:14:05,086 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 208 transitions, 2047 flow [2024-06-14 12:14:05,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:05,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:05,086 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 12:14:05,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:14:05,087 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:14:05,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:05,087 INFO L85 PathProgramCache]: Analyzing trace with hash -912674150, now seen corresponding path program 2 times [2024-06-14 12:14:05,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:05,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314882987] [2024-06-14 12:14:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:05,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:06,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:06,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:06,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314882987] [2024-06-14 12:14:06,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314882987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:06,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:06,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:14:06,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498274977] [2024-06-14 12:14:06,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:06,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:14:06,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:06,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:14:06,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:14:06,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:14:06,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 208 transitions, 2047 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:06,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:06,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:14:06,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:09,064 INFO L124 PetriNetUnfolderBase]: 11871/16654 cut-off events. [2024-06-14 12:14:09,065 INFO L125 PetriNetUnfolderBase]: For 631588/631732 co-relation queries the response was YES. [2024-06-14 12:14:09,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121564 conditions, 16654 events. 11871/16654 cut-off events. For 631588/631732 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 93616 event pairs, 4692 based on Foata normal form. 19/16533 useless extension candidates. Maximal degree in co-relation 121505. Up to 15392 conditions per place. [2024-06-14 12:14:09,255 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 172 selfloop transitions, 86 changer transitions 0/272 dead transitions. [2024-06-14 12:14:09,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 272 transitions, 2916 flow [2024-06-14 12:14:09,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:14:09,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:14:09,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-14 12:14:09,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49266247379454925 [2024-06-14 12:14:09,257 INFO L175 Difference]: Start difference. First operand has 140 places, 208 transitions, 2047 flow. Second operand 9 states and 235 transitions. [2024-06-14 12:14:09,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 272 transitions, 2916 flow [2024-06-14 12:14:09,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 272 transitions, 2822 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-06-14 12:14:09,683 INFO L231 Difference]: Finished difference. Result has 149 places, 220 transitions, 2342 flow [2024-06-14 12:14:09,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1953, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2342, PETRI_PLACES=149, PETRI_TRANSITIONS=220} [2024-06-14 12:14:09,684 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 93 predicate places. [2024-06-14 12:14:09,684 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 220 transitions, 2342 flow [2024-06-14 12:14:09,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:09,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:09,684 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 12:14:09,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:14:09,685 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:14:09,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:09,685 INFO L85 PathProgramCache]: Analyzing trace with hash -646976870, now seen corresponding path program 3 times [2024-06-14 12:14:09,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:09,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337903008] [2024-06-14 12:14:09,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:09,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:10,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:10,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337903008] [2024-06-14 12:14:10,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337903008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:10,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:10,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:14:10,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734042377] [2024-06-14 12:14:10,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:10,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:14:10,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:10,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:14:10,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:14:10,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:14:10,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 220 transitions, 2342 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:10,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:10,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:14:10,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:13,949 INFO L124 PetriNetUnfolderBase]: 12055/16966 cut-off events. [2024-06-14 12:14:13,949 INFO L125 PetriNetUnfolderBase]: For 692538/692682 co-relation queries the response was YES. [2024-06-14 12:14:14,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126827 conditions, 16966 events. 12055/16966 cut-off events. For 692538/692682 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 95958 event pairs, 4339 based on Foata normal form. 19/16845 useless extension candidates. Maximal degree in co-relation 126764. Up to 14691 conditions per place. [2024-06-14 12:14:14,161 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 161 selfloop transitions, 106 changer transitions 0/281 dead transitions. [2024-06-14 12:14:14,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 281 transitions, 3396 flow [2024-06-14 12:14:14,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:14:14,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:14:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-14 12:14:14,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968553459119497 [2024-06-14 12:14:14,163 INFO L175 Difference]: Start difference. First operand has 149 places, 220 transitions, 2342 flow. Second operand 9 states and 237 transitions. [2024-06-14 12:14:14,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 281 transitions, 3396 flow [2024-06-14 12:14:14,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 281 transitions, 3235 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:14,567 INFO L231 Difference]: Finished difference. Result has 156 places, 226 transitions, 2657 flow [2024-06-14 12:14:14,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2181, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2657, PETRI_PLACES=156, PETRI_TRANSITIONS=226} [2024-06-14 12:14:14,567 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 100 predicate places. [2024-06-14 12:14:14,567 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 226 transitions, 2657 flow [2024-06-14 12:14:14,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:14,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:14,568 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 12:14:14,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:14:14,568 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:14:14,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:14,569 INFO L85 PathProgramCache]: Analyzing trace with hash -892667626, now seen corresponding path program 4 times [2024-06-14 12:14:14,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:14,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932130080] [2024-06-14 12:14:14,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:14,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:15,916 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 12:14:15,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:15,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932130080] [2024-06-14 12:14:15,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932130080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:15,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:15,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:14:15,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898554767] [2024-06-14 12:14:15,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:15,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:14:15,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:15,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:14:15,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:14:16,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:14:16,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 226 transitions, 2657 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:16,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:16,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:14:16,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:19,055 INFO L124 PetriNetUnfolderBase]: 12016/16909 cut-off events. [2024-06-14 12:14:19,056 INFO L125 PetriNetUnfolderBase]: For 719964/720108 co-relation queries the response was YES. [2024-06-14 12:14:19,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126744 conditions, 16909 events. 12016/16909 cut-off events. For 719964/720108 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 95625 event pairs, 4719 based on Foata normal form. 19/16788 useless extension candidates. Maximal degree in co-relation 126679. Up to 15615 conditions per place. [2024-06-14 12:14:19,250 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 179 selfloop transitions, 84 changer transitions 0/277 dead transitions. [2024-06-14 12:14:19,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 277 transitions, 3331 flow [2024-06-14 12:14:19,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:14:19,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:14:19,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-14 12:14:19,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49266247379454925 [2024-06-14 12:14:19,251 INFO L175 Difference]: Start difference. First operand has 156 places, 226 transitions, 2657 flow. Second operand 9 states and 235 transitions. [2024-06-14 12:14:19,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 277 transitions, 3331 flow [2024-06-14 12:14:19,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 277 transitions, 3145 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-14 12:14:19,755 INFO L231 Difference]: Finished difference. Result has 159 places, 225 transitions, 2602 flow [2024-06-14 12:14:19,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2602, PETRI_PLACES=159, PETRI_TRANSITIONS=225} [2024-06-14 12:14:19,755 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 103 predicate places. [2024-06-14 12:14:19,755 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 225 transitions, 2602 flow [2024-06-14 12:14:19,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:19,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:19,756 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 12:14:19,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:14:19,756 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:14:19,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:19,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1203906363, now seen corresponding path program 2 times [2024-06-14 12:14:19,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:19,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461862774] [2024-06-14 12:14:19,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:19,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:20,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:20,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461862774] [2024-06-14 12:14:20,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461862774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:20,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:20,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:20,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896269854] [2024-06-14 12:14:20,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:20,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:20,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:20,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:20,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:20,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:14:20,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 225 transitions, 2602 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:20,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:20,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:14:20,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:23,577 INFO L124 PetriNetUnfolderBase]: 11863/16682 cut-off events. [2024-06-14 12:14:23,577 INFO L125 PetriNetUnfolderBase]: For 736545/736586 co-relation queries the response was YES. [2024-06-14 12:14:23,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126310 conditions, 16682 events. 11863/16682 cut-off events. For 736545/736586 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 94791 event pairs, 4982 based on Foata normal form. 27/16644 useless extension candidates. Maximal degree in co-relation 126243. Up to 15918 conditions per place. [2024-06-14 12:14:23,767 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 187 selfloop transitions, 57 changer transitions 0/262 dead transitions. [2024-06-14 12:14:23,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 262 transitions, 3622 flow [2024-06-14 12:14:23,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:23,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 12:14:23,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-14 12:14:23,769 INFO L175 Difference]: Start difference. First operand has 159 places, 225 transitions, 2602 flow. Second operand 7 states and 177 transitions. [2024-06-14 12:14:23,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 262 transitions, 3622 flow [2024-06-14 12:14:24,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 262 transitions, 3342 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 12:14:24,116 INFO L231 Difference]: Finished difference. Result has 159 places, 235 transitions, 2635 flow [2024-06-14 12:14:24,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2322, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2635, PETRI_PLACES=159, PETRI_TRANSITIONS=235} [2024-06-14 12:14:24,117 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 103 predicate places. [2024-06-14 12:14:24,117 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 235 transitions, 2635 flow [2024-06-14 12:14:24,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:24,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:24,118 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 12:14:24,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:14:24,118 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:14:24,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:24,118 INFO L85 PathProgramCache]: Analyzing trace with hash -2024130705, now seen corresponding path program 3 times [2024-06-14 12:14:24,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:24,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157125191] [2024-06-14 12:14:24,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:24,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:25,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:25,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157125191] [2024-06-14 12:14:25,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157125191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:25,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:25,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:25,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992415383] [2024-06-14 12:14:25,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:25,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:25,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:25,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:25,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:25,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:14:25,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 235 transitions, 2635 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:25,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:25,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:14:25,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:27,879 INFO L124 PetriNetUnfolderBase]: 11859/16667 cut-off events. [2024-06-14 12:14:27,879 INFO L125 PetriNetUnfolderBase]: For 781154/781201 co-relation queries the response was YES. [2024-06-14 12:14:27,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129849 conditions, 16667 events. 11859/16667 cut-off events. For 781154/781201 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 94648 event pairs, 4980 based on Foata normal form. 39/16626 useless extension candidates. Maximal degree in co-relation 129782. Up to 15920 conditions per place. [2024-06-14 12:14:28,063 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 180 selfloop transitions, 66 changer transitions 0/264 dead transitions. [2024-06-14 12:14:28,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 264 transitions, 3437 flow [2024-06-14 12:14:28,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:28,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 12:14:28,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-14 12:14:28,064 INFO L175 Difference]: Start difference. First operand has 159 places, 235 transitions, 2635 flow. Second operand 7 states and 175 transitions. [2024-06-14 12:14:28,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 264 transitions, 3437 flow [2024-06-14 12:14:28,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 264 transitions, 3235 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:28,723 INFO L231 Difference]: Finished difference. Result has 162 places, 240 transitions, 2691 flow [2024-06-14 12:14:28,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2447, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2691, PETRI_PLACES=162, PETRI_TRANSITIONS=240} [2024-06-14 12:14:28,724 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 106 predicate places. [2024-06-14 12:14:28,724 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 240 transitions, 2691 flow [2024-06-14 12:14:28,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:28,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:28,725 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 12:14:28,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:14:28,725 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:14:28,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:28,725 INFO L85 PathProgramCache]: Analyzing trace with hash 549395637, now seen corresponding path program 1 times [2024-06-14 12:14:28,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:28,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590654095] [2024-06-14 12:14:28,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:28,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:29,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:29,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590654095] [2024-06-14 12:14:29,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590654095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:29,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:29,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:29,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581697137] [2024-06-14 12:14:29,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:29,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:29,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:29,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:29,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:29,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:14:29,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 240 transitions, 2691 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:29,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:29,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:14:29,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:32,039 INFO L124 PetriNetUnfolderBase]: 10669/15474 cut-off events. [2024-06-14 12:14:32,040 INFO L125 PetriNetUnfolderBase]: For 702324/702465 co-relation queries the response was YES. [2024-06-14 12:14:32,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116895 conditions, 15474 events. 10669/15474 cut-off events. For 702324/702465 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 91713 event pairs, 4009 based on Foata normal form. 3/15304 useless extension candidates. Maximal degree in co-relation 116827. Up to 14429 conditions per place. [2024-06-14 12:14:32,437 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 236 selfloop transitions, 18 changer transitions 0/272 dead transitions. [2024-06-14 12:14:32,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 272 transitions, 3393 flow [2024-06-14 12:14:32,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:32,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 12:14:32,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-14 12:14:32,438 INFO L175 Difference]: Start difference. First operand has 162 places, 240 transitions, 2691 flow. Second operand 7 states and 177 transitions. [2024-06-14 12:14:32,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 272 transitions, 3393 flow [2024-06-14 12:14:32,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 272 transitions, 3229 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:32,880 INFO L231 Difference]: Finished difference. Result has 165 places, 244 transitions, 2686 flow [2024-06-14 12:14:32,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2527, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2686, PETRI_PLACES=165, PETRI_TRANSITIONS=244} [2024-06-14 12:14:32,880 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 109 predicate places. [2024-06-14 12:14:32,881 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 244 transitions, 2686 flow [2024-06-14 12:14:32,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:32,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:32,881 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 12:14:32,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:14:32,881 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:14:32,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:32,882 INFO L85 PathProgramCache]: Analyzing trace with hash 378698043, now seen corresponding path program 1 times [2024-06-14 12:14:32,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:32,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451799732] [2024-06-14 12:14:32,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:32,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:33,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:33,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451799732] [2024-06-14 12:14:33,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451799732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:33,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:33,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:33,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860375161] [2024-06-14 12:14:33,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:33,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:33,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:33,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:33,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:34,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:14:34,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 244 transitions, 2686 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:34,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:34,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:14:34,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:36,522 INFO L124 PetriNetUnfolderBase]: 11284/16200 cut-off events. [2024-06-14 12:14:36,523 INFO L125 PetriNetUnfolderBase]: For 758784/758786 co-relation queries the response was YES. [2024-06-14 12:14:36,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123365 conditions, 16200 events. 11284/16200 cut-off events. For 758784/758786 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 94100 event pairs, 4298 based on Foata normal form. 6/16204 useless extension candidates. Maximal degree in co-relation 123296. Up to 15381 conditions per place. [2024-06-14 12:14:36,927 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 252 selfloop transitions, 29 changer transitions 0/288 dead transitions. [2024-06-14 12:14:36,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 288 transitions, 3788 flow [2024-06-14 12:14:36,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:36,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:36,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 12:14:36,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-14 12:14:36,929 INFO L175 Difference]: Start difference. First operand has 165 places, 244 transitions, 2686 flow. Second operand 7 states and 178 transitions. [2024-06-14 12:14:36,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 288 transitions, 3788 flow [2024-06-14 12:14:37,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 288 transitions, 3659 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-14 12:14:37,428 INFO L231 Difference]: Finished difference. Result has 169 places, 258 transitions, 2912 flow [2024-06-14 12:14:37,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2557, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2912, PETRI_PLACES=169, PETRI_TRANSITIONS=258} [2024-06-14 12:14:37,429 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 113 predicate places. [2024-06-14 12:14:37,429 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 258 transitions, 2912 flow [2024-06-14 12:14:37,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:37,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:37,429 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 12:14:37,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:14:37,429 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:14:37,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:37,430 INFO L85 PathProgramCache]: Analyzing trace with hash 555829563, now seen corresponding path program 2 times [2024-06-14 12:14:37,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:37,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207856325] [2024-06-14 12:14:37,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:37,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:38,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:38,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207856325] [2024-06-14 12:14:38,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207856325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:38,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:38,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:38,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651565691] [2024-06-14 12:14:38,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:38,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:38,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:38,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:38,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:38,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:14:38,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 258 transitions, 2912 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:38,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:38,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:14:38,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:40,820 INFO L124 PetriNetUnfolderBase]: 11381/16332 cut-off events. [2024-06-14 12:14:40,820 INFO L125 PetriNetUnfolderBase]: For 825706/825712 co-relation queries the response was YES. [2024-06-14 12:14:40,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129866 conditions, 16332 events. 11381/16332 cut-off events. For 825706/825712 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 94812 event pairs, 4316 based on Foata normal form. 10/16340 useless extension candidates. Maximal degree in co-relation 129794. Up to 15361 conditions per place. [2024-06-14 12:14:41,295 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 244 selfloop transitions, 47 changer transitions 0/298 dead transitions. [2024-06-14 12:14:41,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 298 transitions, 4118 flow [2024-06-14 12:14:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:41,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:41,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 12:14:41,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48517520215633425 [2024-06-14 12:14:41,297 INFO L175 Difference]: Start difference. First operand has 169 places, 258 transitions, 2912 flow. Second operand 7 states and 180 transitions. [2024-06-14 12:14:41,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 298 transitions, 4118 flow [2024-06-14 12:14:41,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 298 transitions, 3978 flow, removed 65 selfloop flow, removed 2 redundant places. [2024-06-14 12:14:41,922 INFO L231 Difference]: Finished difference. Result has 175 places, 268 transitions, 3099 flow [2024-06-14 12:14:41,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2772, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3099, PETRI_PLACES=175, PETRI_TRANSITIONS=268} [2024-06-14 12:14:41,922 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 119 predicate places. [2024-06-14 12:14:41,922 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 268 transitions, 3099 flow [2024-06-14 12:14:41,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:41,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:41,923 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 12:14:41,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:14:41,923 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:14:41,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:41,924 INFO L85 PathProgramCache]: Analyzing trace with hash 556066713, now seen corresponding path program 3 times [2024-06-14 12:14:41,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:41,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807047821] [2024-06-14 12:14:41,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:41,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:42,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:42,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807047821] [2024-06-14 12:14:42,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807047821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:42,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:42,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:42,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143256175] [2024-06-14 12:14:42,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:42,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:42,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:42,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:42,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:43,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:14:43,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 268 transitions, 3099 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:43,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:43,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:14:43,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand