./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix051_pso.opt_rmo.opt_tso.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/mix051_pso.opt_rmo.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix051_pso.opt_rmo.opt_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix051_pso.opt_rmo.opt_tso.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-76401ed-m [2024-06-20 16:28:03,918 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:28:03,977 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:28:03,980 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:28:03,980 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:28:03,993 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:28:03,993 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:28:03,993 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:28:03,994 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:28:03,994 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:28:03,994 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:28:03,994 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:28:03,995 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:28:03,995 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:28:03,995 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:28:03,996 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:28:03,996 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:28:03,996 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:28:03,996 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:28:03,996 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:28:03,997 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:28:03,997 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:28:03,997 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:28:03,998 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:28:03,998 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:28:03,998 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:28:03,998 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:28:03,998 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:28:03,999 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:28:03,999 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:28:03,999 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:28:03,999 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:28:03,999 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:28:04,000 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:28:04,000 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:28:04,000 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:28:04,000 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:28:04,000 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:28:04,001 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:28:04,001 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:28:04,001 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:28:04,001 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:28:04,001 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:28:04,001 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:28:04,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:28:04,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:28:04,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:28:04,188 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:28:04,189 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:28:04,189 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix051_pso.opt_rmo.opt_tso.opt.i [2024-06-20 16:28:05,315 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:28:05,530 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:28:05,531 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix051_pso.opt_rmo.opt_tso.opt.i [2024-06-20 16:28:05,543 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4ab283d9/c5af15b24360480db4195e0dabf83729/FLAG31bae2ea6 [2024-06-20 16:28:05,557 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4ab283d9/c5af15b24360480db4195e0dabf83729 [2024-06-20 16:28:05,559 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:28:05,561 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:28:05,561 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix051_pso.opt_rmo.opt_tso.opt.yml/witness.yml [2024-06-20 16:28:05,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:28:05,747 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:28:05,748 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:28:05,748 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:28:05,752 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:28:05,752 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:28:05" (1/2) ... [2024-06-20 16:28:05,753 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f4ceeae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:28:05, skipping insertion in model container [2024-06-20 16:28:05,754 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:28:05" (1/2) ... [2024-06-20 16:28:05,755 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7b6ecc53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:28:05, skipping insertion in model container [2024-06-20 16:28:05,755 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:28:05" (2/2) ... [2024-06-20 16:28:05,756 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f4ceeae and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:05, skipping insertion in model container [2024-06-20 16:28:05,756 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:28:05" (2/2) ... [2024-06-20 16:28:05,756 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:28:05,874 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:28:05,880 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-20 16:28:05,880 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-20 16:28:05,880 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-20 16:28:05,880 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-20 16:28:05,880 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:28:05,881 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-20 16:28:05,929 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:28:06,180 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:28:06,196 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:28:06,344 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:28:06,383 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:28:06,383 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:06 WrapperNode [2024-06-20 16:28:06,384 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:28:06,385 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:28:06,385 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:28:06,385 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:28:06,390 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:06" (1/1) ... [2024-06-20 16:28:06,424 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:06" (1/1) ... [2024-06-20 16:28:06,457 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 138 [2024-06-20 16:28:06,457 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:28:06,458 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:28:06,458 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:28:06,458 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:28:06,466 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:06" (1/1) ... [2024-06-20 16:28:06,467 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:06" (1/1) ... [2024-06-20 16:28:06,469 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:06" (1/1) ... [2024-06-20 16:28:06,483 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 16:28:06,483 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:06" (1/1) ... [2024-06-20 16:28:06,483 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:06" (1/1) ... [2024-06-20 16:28:06,491 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:06" (1/1) ... [2024-06-20 16:28:06,492 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:06" (1/1) ... [2024-06-20 16:28:06,494 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:06" (1/1) ... [2024-06-20 16:28:06,495 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:06" (1/1) ... [2024-06-20 16:28:06,498 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:28:06,499 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:28:06,499 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:28:06,499 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:28:06,500 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:06" (1/1) ... [2024-06-20 16:28:06,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:28:06,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:28:06,531 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 16:28:06,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 16:28:06,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:28:06,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:28:06,583 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:28:06,583 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:28:06,583 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:28:06,583 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:28:06,583 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:28:06,583 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:28:06,583 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 16:28:06,583 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 16:28:06,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:28:06,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:28:06,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:28:06,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:28:06,585 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:28:06,722 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:28:06,723 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:28:07,060 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:28:07,061 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:28:07,199 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:28:07,199 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:28:07,200 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:28:07 BoogieIcfgContainer [2024-06-20 16:28:07,200 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:28:07,201 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:28:07,201 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:28:07,204 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:28:07,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:28:05" (1/4) ... [2024-06-20 16:28:07,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e9a06fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:28:07, skipping insertion in model container [2024-06-20 16:28:07,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:28:05" (2/4) ... [2024-06-20 16:28:07,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e9a06fd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:28:07, skipping insertion in model container [2024-06-20 16:28:07,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:06" (3/4) ... [2024-06-20 16:28:07,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e9a06fd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:28:07, skipping insertion in model container [2024-06-20 16:28:07,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:28:07" (4/4) ... [2024-06-20 16:28:07,206 INFO L112 eAbstractionObserver]: Analyzing ICFG mix051_pso.opt_rmo.opt_tso.opt.i [2024-06-20 16:28:07,219 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:28:07,219 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 16:28:07,219 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:28:07,267 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:28:07,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-20 16:28:07,346 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-20 16:28:07,347 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:28:07,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:28:07,349 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-20 16:28:07,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-20 16:28:07,363 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:28:07,369 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;@38f7220a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:28:07,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 16:28:07,372 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:28:07,372 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-20 16:28:07,373 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:28:07,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:07,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:28:07,374 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:07,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:07,378 INFO L85 PathProgramCache]: Analyzing trace with hash 373213845, now seen corresponding path program 1 times [2024-06-20 16:28:07,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:07,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647583115] [2024-06-20 16:28:07,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:07,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:08,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:08,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:08,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647583115] [2024-06-20 16:28:08,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647583115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:08,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:08,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:28:08,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824236627] [2024-06-20 16:28:08,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:08,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:28:08,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:08,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:28:08,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:28:08,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-20 16:28:08,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:08,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:08,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-20 16:28:08,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:09,340 INFO L124 PetriNetUnfolderBase]: 5296/7608 cut-off events. [2024-06-20 16:28:09,341 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-06-20 16:28:09,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15159 conditions, 7608 events. 5296/7608 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 42812 event pairs, 3946 based on Foata normal form. 1/7420 useless extension candidates. Maximal degree in co-relation 15146. Up to 7282 conditions per place. [2024-06-20 16:28:09,383 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 40 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-20 16:28:09,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 221 flow [2024-06-20 16:28:09,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:28:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:28:09,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-06-20 16:28:09,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6535947712418301 [2024-06-20 16:28:09,394 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 100 transitions. [2024-06-20 16:28:09,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 221 flow [2024-06-20 16:28:09,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 16:28:09,402 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-20 16:28:09,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-20 16:28:09,406 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-20 16:28:09,406 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-20 16:28:09,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:09,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:09,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:09,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:28:09,407 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:09,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:09,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2118699822, now seen corresponding path program 1 times [2024-06-20 16:28:09,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:09,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060163877] [2024-06-20 16:28:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:09,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:10,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:10,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060163877] [2024-06-20 16:28:10,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060163877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:10,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:10,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:28:10,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698336419] [2024-06-20 16:28:10,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:10,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:28:10,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:10,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:28:10,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:28:10,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-20 16:28:10,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:10,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:10,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-20 16:28:10,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:11,112 INFO L124 PetriNetUnfolderBase]: 6191/8655 cut-off events. [2024-06-20 16:28:11,113 INFO L125 PetriNetUnfolderBase]: For 1762/1762 co-relation queries the response was YES. [2024-06-20 16:28:11,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19893 conditions, 8655 events. 6191/8655 cut-off events. For 1762/1762 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 47391 event pairs, 4100 based on Foata normal form. 4/8601 useless extension candidates. Maximal degree in co-relation 19881. Up to 8452 conditions per place. [2024-06-20 16:28:11,153 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 51 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-20 16:28:11,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 315 flow [2024-06-20 16:28:11,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:28:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:28:11,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-20 16:28:11,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6274509803921569 [2024-06-20 16:28:11,155 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 128 transitions. [2024-06-20 16:28:11,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 315 flow [2024-06-20 16:28:11,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:28:11,157 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 177 flow [2024-06-20 16:28:11,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-20 16:28:11,158 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-06-20 16:28:11,158 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 177 flow [2024-06-20 16:28:11,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:11,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:11,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:11,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:28:11,159 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:11,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:11,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1255184382, now seen corresponding path program 1 times [2024-06-20 16:28:11,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:11,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991764066] [2024-06-20 16:28:11,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:11,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:11,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:11,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991764066] [2024-06-20 16:28:11,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991764066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:11,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:11,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:28:11,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915543993] [2024-06-20 16:28:11,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:11,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:28:11,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:11,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:28:11,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:28:11,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-20 16:28:11,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:11,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:11,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-20 16:28:11,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:12,891 INFO L124 PetriNetUnfolderBase]: 6209/8722 cut-off events. [2024-06-20 16:28:12,892 INFO L125 PetriNetUnfolderBase]: For 5064/5064 co-relation queries the response was YES. [2024-06-20 16:28:12,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22473 conditions, 8722 events. 6209/8722 cut-off events. For 5064/5064 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 48031 event pairs, 3061 based on Foata normal form. 7/8704 useless extension candidates. Maximal degree in co-relation 22459. Up to 8373 conditions per place. [2024-06-20 16:28:12,937 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 69 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-20 16:28:12,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 99 transitions, 531 flow [2024-06-20 16:28:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:28:12,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:28:12,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 168 transitions. [2024-06-20 16:28:12,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588235294117647 [2024-06-20 16:28:12,939 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 177 flow. Second operand 5 states and 168 transitions. [2024-06-20 16:28:12,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 99 transitions, 531 flow [2024-06-20 16:28:12,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 512 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 16:28:12,942 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 308 flow [2024-06-20 16:28:12,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-06-20 16:28:12,943 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-20 16:28:12,943 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 308 flow [2024-06-20 16:28:12,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:12,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:12,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:12,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:28:12,944 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:12,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:12,945 INFO L85 PathProgramCache]: Analyzing trace with hash -205233313, now seen corresponding path program 1 times [2024-06-20 16:28:12,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:12,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498235695] [2024-06-20 16:28:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:12,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:12,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:13,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:13,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498235695] [2024-06-20 16:28:13,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498235695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:13,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:13,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:28:13,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268159276] [2024-06-20 16:28:13,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:13,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:28:13,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:13,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:28:13,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:28:13,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-20 16:28:13,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 308 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) [2024-06-20 16:28:13,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:13,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-20 16:28:13,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:14,626 INFO L124 PetriNetUnfolderBase]: 6351/8942 cut-off events. [2024-06-20 16:28:14,626 INFO L125 PetriNetUnfolderBase]: For 12467/12486 co-relation queries the response was YES. [2024-06-20 16:28:14,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27267 conditions, 8942 events. 6351/8942 cut-off events. For 12467/12486 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 49795 event pairs, 2386 based on Foata normal form. 48/8963 useless extension candidates. Maximal degree in co-relation 27250. Up to 8365 conditions per place. [2024-06-20 16:28:14,712 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 79 selfloop transitions, 24 changer transitions 0/112 dead transitions. [2024-06-20 16:28:14,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 112 transitions, 686 flow [2024-06-20 16:28:14,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:28:14,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:28:14,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 197 transitions. [2024-06-20 16:28:14,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6437908496732027 [2024-06-20 16:28:14,715 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 308 flow. Second operand 6 states and 197 transitions. [2024-06-20 16:28:14,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 112 transitions, 686 flow [2024-06-20 16:28:14,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 112 transitions, 674 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-20 16:28:14,728 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 377 flow [2024-06-20 16:28:14,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=377, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-20 16:28:14,729 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2024-06-20 16:28:14,729 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 377 flow [2024-06-20 16:28:14,730 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) [2024-06-20 16:28:14,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:14,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:14,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:28:14,730 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:14,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:14,731 INFO L85 PathProgramCache]: Analyzing trace with hash -351027276, now seen corresponding path program 1 times [2024-06-20 16:28:14,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:14,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539029088] [2024-06-20 16:28:14,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:14,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:15,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:15,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539029088] [2024-06-20 16:28:15,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539029088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:15,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:15,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:28:15,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409979815] [2024-06-20 16:28:15,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:15,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:28:15,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:15,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:28:15,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:28:15,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-20 16:28:15,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 377 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:15,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:15,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-20 16:28:15,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:16,358 INFO L124 PetriNetUnfolderBase]: 5437/7897 cut-off events. [2024-06-20 16:28:16,358 INFO L125 PetriNetUnfolderBase]: For 15553/15581 co-relation queries the response was YES. [2024-06-20 16:28:16,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25886 conditions, 7897 events. 5437/7897 cut-off events. For 15553/15581 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 45435 event pairs, 2456 based on Foata normal form. 3/7879 useless extension candidates. Maximal degree in co-relation 25865. Up to 7488 conditions per place. [2024-06-20 16:28:16,400 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 63 selfloop transitions, 10 changer transitions 0/82 dead transitions. [2024-06-20 16:28:16,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 567 flow [2024-06-20 16:28:16,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:28:16,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:28:16,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-20 16:28:16,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254901960784314 [2024-06-20 16:28:16,404 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 377 flow. Second operand 5 states and 134 transitions. [2024-06-20 16:28:16,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 567 flow [2024-06-20 16:28:16,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 82 transitions, 506 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 16:28:16,411 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 347 flow [2024-06-20 16:28:16,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-20 16:28:16,416 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2024-06-20 16:28:16,416 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 347 flow [2024-06-20 16:28:16,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:16,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:16,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:16,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:28:16,417 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:16,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:16,417 INFO L85 PathProgramCache]: Analyzing trace with hash -78198259, now seen corresponding path program 1 times [2024-06-20 16:28:16,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:16,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493062626] [2024-06-20 16:28:16,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:16,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:17,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:17,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493062626] [2024-06-20 16:28:17,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493062626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:17,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:17,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:28:17,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962703913] [2024-06-20 16:28:17,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:17,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:28:17,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:17,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:28:17,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:28:17,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-20 16:28:17,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:17,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:17,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-20 16:28:17,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:18,403 INFO L124 PetriNetUnfolderBase]: 6355/8944 cut-off events. [2024-06-20 16:28:18,404 INFO L125 PetriNetUnfolderBase]: For 21038/21058 co-relation queries the response was YES. [2024-06-20 16:28:18,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29779 conditions, 8944 events. 6355/8944 cut-off events. For 21038/21058 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 49667 event pairs, 2932 based on Foata normal form. 24/8947 useless extension candidates. Maximal degree in co-relation 29756. Up to 8595 conditions per place. [2024-06-20 16:28:18,462 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 66 selfloop transitions, 25 changer transitions 0/99 dead transitions. [2024-06-20 16:28:18,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 99 transitions, 666 flow [2024-06-20 16:28:18,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:28:18,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:28:18,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-20 16:28:18,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392156862745098 [2024-06-20 16:28:18,464 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 347 flow. Second operand 6 states and 165 transitions. [2024-06-20 16:28:18,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 99 transitions, 666 flow [2024-06-20 16:28:18,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 637 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 16:28:18,473 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 414 flow [2024-06-20 16:28:18,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=414, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-20 16:28:18,473 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2024-06-20 16:28:18,473 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 414 flow [2024-06-20 16:28:18,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:18,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:18,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:18,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:28:18,474 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:18,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:18,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1965254995, now seen corresponding path program 2 times [2024-06-20 16:28:18,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:18,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208513804] [2024-06-20 16:28:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:18,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:19,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:19,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208513804] [2024-06-20 16:28:19,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208513804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:19,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:19,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:28:19,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548667853] [2024-06-20 16:28:19,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:19,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:28:19,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:19,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:28:19,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:28:19,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-20 16:28:19,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 414 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:19,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:19,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-20 16:28:19,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:20,374 INFO L124 PetriNetUnfolderBase]: 6310/8871 cut-off events. [2024-06-20 16:28:20,375 INFO L125 PetriNetUnfolderBase]: For 25004/25026 co-relation queries the response was YES. [2024-06-20 16:28:20,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30365 conditions, 8871 events. 6310/8871 cut-off events. For 25004/25026 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 48985 event pairs, 2946 based on Foata normal form. 23/8867 useless extension candidates. Maximal degree in co-relation 30342. Up to 8526 conditions per place. [2024-06-20 16:28:20,425 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 59 selfloop transitions, 26 changer transitions 0/93 dead transitions. [2024-06-20 16:28:20,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 646 flow [2024-06-20 16:28:20,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:28:20,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:28:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-20 16:28:20,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228758169934641 [2024-06-20 16:28:20,427 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 414 flow. Second operand 6 states and 160 transitions. [2024-06-20 16:28:20,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 646 flow [2024-06-20 16:28:20,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 603 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:28:20,438 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 434 flow [2024-06-20 16:28:20,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=434, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2024-06-20 16:28:20,439 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 18 predicate places. [2024-06-20 16:28:20,439 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 434 flow [2024-06-20 16:28:20,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:20,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:20,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:20,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:28:20,440 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:20,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:20,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1558989351, now seen corresponding path program 1 times [2024-06-20 16:28:20,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:20,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415134694] [2024-06-20 16:28:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:20,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:21,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:21,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415134694] [2024-06-20 16:28:21,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415134694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:21,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:21,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:28:21,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869365168] [2024-06-20 16:28:21,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:21,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:28:21,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:21,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:28:21,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:28:21,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-20 16:28:21,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 434 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:21,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:21,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-20 16:28:21,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:22,775 INFO L124 PetriNetUnfolderBase]: 6889/9838 cut-off events. [2024-06-20 16:28:22,776 INFO L125 PetriNetUnfolderBase]: For 30543/30543 co-relation queries the response was YES. [2024-06-20 16:28:22,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33613 conditions, 9838 events. 6889/9838 cut-off events. For 30543/30543 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 54859 event pairs, 3133 based on Foata normal form. 6/9828 useless extension candidates. Maximal degree in co-relation 33589. Up to 9382 conditions per place. [2024-06-20 16:28:22,834 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 83 selfloop transitions, 17 changer transitions 0/108 dead transitions. [2024-06-20 16:28:22,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 108 transitions, 771 flow [2024-06-20 16:28:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:28:22,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:28:22,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 16:28:22,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042016806722689 [2024-06-20 16:28:22,836 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 434 flow. Second operand 7 states and 180 transitions. [2024-06-20 16:28:22,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 108 transitions, 771 flow [2024-06-20 16:28:22,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 108 transitions, 680 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:28:22,857 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 455 flow [2024-06-20 16:28:22,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=455, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-20 16:28:22,858 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2024-06-20 16:28:22,858 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 455 flow [2024-06-20 16:28:22,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:22,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:22,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:22,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:28:22,859 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:22,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:22,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1464977718, now seen corresponding path program 1 times [2024-06-20 16:28:22,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:22,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102000352] [2024-06-20 16:28:22,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:22,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:23,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:23,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102000352] [2024-06-20 16:28:23,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102000352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:23,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:23,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:28:23,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596514093] [2024-06-20 16:28:23,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:23,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:28:23,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:23,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:28:23,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:28:23,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-20 16:28:23,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 455 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:23,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:23,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-20 16:28:23,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:24,692 INFO L124 PetriNetUnfolderBase]: 6875/10012 cut-off events. [2024-06-20 16:28:24,692 INFO L125 PetriNetUnfolderBase]: For 37845/37845 co-relation queries the response was YES. [2024-06-20 16:28:24,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35908 conditions, 10012 events. 6875/10012 cut-off events. For 37845/37845 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 57012 event pairs, 3191 based on Foata normal form. 4/10013 useless extension candidates. Maximal degree in co-relation 35882. Up to 9406 conditions per place. [2024-06-20 16:28:24,743 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 77 selfloop transitions, 10 changer transitions 0/95 dead transitions. [2024-06-20 16:28:24,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 95 transitions, 699 flow [2024-06-20 16:28:24,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:28:24,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:28:24,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-20 16:28:24,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4980392156862745 [2024-06-20 16:28:24,745 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 455 flow. Second operand 5 states and 127 transitions. [2024-06-20 16:28:24,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 95 transitions, 699 flow [2024-06-20 16:28:24,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 95 transitions, 651 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 16:28:24,764 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 476 flow [2024-06-20 16:28:24,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=476, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-20 16:28:24,765 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 21 predicate places. [2024-06-20 16:28:24,765 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 476 flow [2024-06-20 16:28:24,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:24,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:24,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:24,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:28:24,766 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:24,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:24,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1848568094, now seen corresponding path program 1 times [2024-06-20 16:28:24,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:24,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204510375] [2024-06-20 16:28:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:24,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:25,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:25,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204510375] [2024-06-20 16:28:25,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204510375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:25,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:25,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:28:25,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116122088] [2024-06-20 16:28:25,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:25,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:28:25,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:25,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:28:25,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:28:25,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-20 16:28:25,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 476 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) [2024-06-20 16:28:25,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:25,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-20 16:28:25,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:27,022 INFO L124 PetriNetUnfolderBase]: 8101/11387 cut-off events. [2024-06-20 16:28:27,023 INFO L125 PetriNetUnfolderBase]: For 59985/60077 co-relation queries the response was YES. [2024-06-20 16:28:27,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44489 conditions, 11387 events. 8101/11387 cut-off events. For 59985/60077 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 64063 event pairs, 2691 based on Foata normal form. 54/11411 useless extension candidates. Maximal degree in co-relation 44462. Up to 10308 conditions per place. [2024-06-20 16:28:27,084 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 88 selfloop transitions, 32 changer transitions 0/129 dead transitions. [2024-06-20 16:28:27,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 129 transitions, 940 flow [2024-06-20 16:28:27,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:28:27,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:28:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-20 16:28:27,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434173669467787 [2024-06-20 16:28:27,086 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 476 flow. Second operand 7 states and 194 transitions. [2024-06-20 16:28:27,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 129 transitions, 940 flow [2024-06-20 16:28:27,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 129 transitions, 901 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 16:28:27,105 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 566 flow [2024-06-20 16:28:27,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=566, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-20 16:28:27,106 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 25 predicate places. [2024-06-20 16:28:27,106 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 566 flow [2024-06-20 16:28:27,106 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) [2024-06-20 16:28:27,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:27,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:27,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:28:27,107 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:27,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:27,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1848507644, now seen corresponding path program 2 times [2024-06-20 16:28:27,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:27,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419767562] [2024-06-20 16:28:27,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:27,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:27,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:27,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419767562] [2024-06-20 16:28:27,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419767562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:27,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:27,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:28:27,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947971397] [2024-06-20 16:28:27,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:27,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:28:27,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:27,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:28:27,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:28:28,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-20 16:28:28,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 566 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) [2024-06-20 16:28:28,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:28,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-20 16:28:28,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:29,409 INFO L124 PetriNetUnfolderBase]: 8134/11469 cut-off events. [2024-06-20 16:28:29,409 INFO L125 PetriNetUnfolderBase]: For 73067/73159 co-relation queries the response was YES. [2024-06-20 16:28:29,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46713 conditions, 11469 events. 8134/11469 cut-off events. For 73067/73159 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 65199 event pairs, 3552 based on Foata normal form. 87/11526 useless extension candidates. Maximal degree in co-relation 46685. Up to 10852 conditions per place. [2024-06-20 16:28:29,483 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 85 selfloop transitions, 31 changer transitions 0/125 dead transitions. [2024-06-20 16:28:29,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 125 transitions, 934 flow [2024-06-20 16:28:29,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:28:29,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:28:29,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-20 16:28:29,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5322128851540616 [2024-06-20 16:28:29,485 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 566 flow. Second operand 7 states and 190 transitions. [2024-06-20 16:28:29,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 125 transitions, 934 flow [2024-06-20 16:28:29,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 125 transitions, 887 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 16:28:29,521 INFO L231 Difference]: Finished difference. Result has 83 places, 87 transitions, 634 flow [2024-06-20 16:28:29,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=634, PETRI_PLACES=83, PETRI_TRANSITIONS=87} [2024-06-20 16:28:29,522 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 29 predicate places. [2024-06-20 16:28:29,522 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 87 transitions, 634 flow [2024-06-20 16:28:29,522 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) [2024-06-20 16:28:29,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:29,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:29,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:28:29,523 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)] === [2024-06-20 16:28:29,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:29,523 INFO L85 PathProgramCache]: Analyzing trace with hash -917083243, now seen corresponding path program 1 times [2024-06-20 16:28:29,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:29,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932400379] [2024-06-20 16:28:29,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:29,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:30,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:30,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932400379] [2024-06-20 16:28:30,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932400379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:30,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:30,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:28:30,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747863891] [2024-06-20 16:28:30,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:30,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:28:30,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:30,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:28:30,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:28:30,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:28:30,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 87 transitions, 634 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:30,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:30,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:28:30,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:31,760 INFO L124 PetriNetUnfolderBase]: 8465/11899 cut-off events. [2024-06-20 16:28:31,760 INFO L125 PetriNetUnfolderBase]: For 83193/83193 co-relation queries the response was YES. [2024-06-20 16:28:31,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50015 conditions, 11899 events. 8465/11899 cut-off events. For 83193/83193 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 65614 event pairs, 3709 based on Foata normal form. 4/11897 useless extension candidates. Maximal degree in co-relation 49985. Up to 11517 conditions per place. [2024-06-20 16:28:31,849 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 96 selfloop transitions, 21 changer transitions 0/124 dead transitions. [2024-06-20 16:28:31,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 124 transitions, 1064 flow [2024-06-20 16:28:31,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:28:31,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:28:31,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 16:28:31,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-06-20 16:28:31,850 INFO L175 Difference]: Start difference. First operand has 83 places, 87 transitions, 634 flow. Second operand 6 states and 156 transitions. [2024-06-20 16:28:31,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 124 transitions, 1064 flow [2024-06-20 16:28:31,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 124 transitions, 985 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 16:28:31,923 INFO L231 Difference]: Finished difference. Result has 84 places, 95 transitions, 694 flow [2024-06-20 16:28:31,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=694, PETRI_PLACES=84, PETRI_TRANSITIONS=95} [2024-06-20 16:28:31,923 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2024-06-20 16:28:31,923 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 95 transitions, 694 flow [2024-06-20 16:28:31,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:31,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:31,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:31,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:28:31,924 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:31,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:31,925 INFO L85 PathProgramCache]: Analyzing trace with hash 518398810, now seen corresponding path program 1 times [2024-06-20 16:28:31,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:31,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406009228] [2024-06-20 16:28:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:31,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:32,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:32,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:32,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406009228] [2024-06-20 16:28:32,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406009228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:32,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:32,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:32,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732573107] [2024-06-20 16:28:32,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:32,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:32,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:32,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:32,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:33,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:28:33,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 95 transitions, 694 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:33,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:33,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:28:33,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:34,492 INFO L124 PetriNetUnfolderBase]: 8523/11974 cut-off events. [2024-06-20 16:28:34,493 INFO L125 PetriNetUnfolderBase]: For 99030/99030 co-relation queries the response was YES. [2024-06-20 16:28:34,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52650 conditions, 11974 events. 8523/11974 cut-off events. For 99030/99030 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 65935 event pairs, 3526 based on Foata normal form. 6/11966 useless extension candidates. Maximal degree in co-relation 52619. Up to 11416 conditions per place. [2024-06-20 16:28:34,577 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 100 selfloop transitions, 37 changer transitions 0/144 dead transitions. [2024-06-20 16:28:34,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 144 transitions, 1152 flow [2024-06-20 16:28:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:28:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:28:34,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-20 16:28:34,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049019607843137 [2024-06-20 16:28:34,579 INFO L175 Difference]: Start difference. First operand has 84 places, 95 transitions, 694 flow. Second operand 8 states and 206 transitions. [2024-06-20 16:28:34,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 144 transitions, 1152 flow [2024-06-20 16:28:34,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 144 transitions, 1110 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-20 16:28:34,648 INFO L231 Difference]: Finished difference. Result has 91 places, 103 transitions, 827 flow [2024-06-20 16:28:34,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=827, PETRI_PLACES=91, PETRI_TRANSITIONS=103} [2024-06-20 16:28:34,649 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 37 predicate places. [2024-06-20 16:28:34,649 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 103 transitions, 827 flow [2024-06-20 16:28:34,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:34,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:34,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:34,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:28:34,650 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:34,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:34,650 INFO L85 PathProgramCache]: Analyzing trace with hash 746299960, now seen corresponding path program 2 times [2024-06-20 16:28:34,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:34,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242146565] [2024-06-20 16:28:34,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:34,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:35,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:35,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242146565] [2024-06-20 16:28:35,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242146565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:35,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:35,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:35,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757306426] [2024-06-20 16:28:35,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:35,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:35,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:35,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:35,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:35,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:28:35,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 827 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:35,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:35,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:28:35,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:37,187 INFO L124 PetriNetUnfolderBase]: 8508/11948 cut-off events. [2024-06-20 16:28:37,188 INFO L125 PetriNetUnfolderBase]: For 113352/113352 co-relation queries the response was YES. [2024-06-20 16:28:37,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54803 conditions, 11948 events. 8508/11948 cut-off events. For 113352/113352 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 65775 event pairs, 3523 based on Foata normal form. 6/11940 useless extension candidates. Maximal degree in co-relation 54769. Up to 11395 conditions per place. [2024-06-20 16:28:37,280 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 102 selfloop transitions, 45 changer transitions 0/154 dead transitions. [2024-06-20 16:28:37,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 154 transitions, 1351 flow [2024-06-20 16:28:37,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:28:37,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:28:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-20 16:28:37,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049019607843137 [2024-06-20 16:28:37,283 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 827 flow. Second operand 8 states and 206 transitions. [2024-06-20 16:28:37,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 154 transitions, 1351 flow [2024-06-20 16:28:37,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 154 transitions, 1233 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 16:28:37,385 INFO L231 Difference]: Finished difference. Result has 95 places, 114 transitions, 956 flow [2024-06-20 16:28:37,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=956, PETRI_PLACES=95, PETRI_TRANSITIONS=114} [2024-06-20 16:28:37,386 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 41 predicate places. [2024-06-20 16:28:37,386 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 114 transitions, 956 flow [2024-06-20 16:28:37,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:37,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:37,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:37,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:28:37,387 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:37,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:37,387 INFO L85 PathProgramCache]: Analyzing trace with hash 754870840, now seen corresponding path program 3 times [2024-06-20 16:28:37,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:37,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963124892] [2024-06-20 16:28:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:37,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:38,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:38,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963124892] [2024-06-20 16:28:38,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963124892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:38,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:38,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:38,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086447420] [2024-06-20 16:28:38,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:38,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:38,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:38,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:38,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:38,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:28:38,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 114 transitions, 956 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:38,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:38,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:28:38,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:40,048 INFO L124 PetriNetUnfolderBase]: 8585/12087 cut-off events. [2024-06-20 16:28:40,049 INFO L125 PetriNetUnfolderBase]: For 128582/128582 co-relation queries the response was YES. [2024-06-20 16:28:40,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57076 conditions, 12087 events. 8585/12087 cut-off events. For 128582/128582 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 66747 event pairs, 3155 based on Foata normal form. 6/12080 useless extension candidates. Maximal degree in co-relation 57040. Up to 11234 conditions per place. [2024-06-20 16:28:40,129 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 100 selfloop transitions, 56 changer transitions 0/163 dead transitions. [2024-06-20 16:28:40,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 163 transitions, 1450 flow [2024-06-20 16:28:40,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:28:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:28:40,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-20 16:28:40,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5147058823529411 [2024-06-20 16:28:40,132 INFO L175 Difference]: Start difference. First operand has 95 places, 114 transitions, 956 flow. Second operand 8 states and 210 transitions. [2024-06-20 16:28:40,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 163 transitions, 1450 flow [2024-06-20 16:28:40,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 163 transitions, 1356 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-20 16:28:40,218 INFO L231 Difference]: Finished difference. Result has 101 places, 119 transitions, 1075 flow [2024-06-20 16:28:40,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1075, PETRI_PLACES=101, PETRI_TRANSITIONS=119} [2024-06-20 16:28:40,219 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 47 predicate places. [2024-06-20 16:28:40,219 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 119 transitions, 1075 flow [2024-06-20 16:28:40,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:40,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:40,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:40,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:28:40,220 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:40,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:40,220 INFO L85 PathProgramCache]: Analyzing trace with hash -905655403, now seen corresponding path program 2 times [2024-06-20 16:28:40,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:40,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156556528] [2024-06-20 16:28:40,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:40,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:40,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:40,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156556528] [2024-06-20 16:28:40,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156556528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:40,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:40,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:28:40,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241804597] [2024-06-20 16:28:40,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:40,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:28:40,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:40,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:28:40,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:28:40,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:28:40,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 119 transitions, 1075 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:40,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:40,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:28:40,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:42,520 INFO L124 PetriNetUnfolderBase]: 8571/12096 cut-off events. [2024-06-20 16:28:42,521 INFO L125 PetriNetUnfolderBase]: For 144755/144770 co-relation queries the response was YES. [2024-06-20 16:28:42,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58779 conditions, 12096 events. 8571/12096 cut-off events. For 144755/144770 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 67067 event pairs, 3493 based on Foata normal form. 14/12104 useless extension candidates. Maximal degree in co-relation 58741. Up to 11685 conditions per place. [2024-06-20 16:28:42,595 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 111 selfloop transitions, 21 changer transitions 0/139 dead transitions. [2024-06-20 16:28:42,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 139 transitions, 1389 flow [2024-06-20 16:28:42,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:28:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:28:42,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-20 16:28:42,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2024-06-20 16:28:42,596 INFO L175 Difference]: Start difference. First operand has 101 places, 119 transitions, 1075 flow. Second operand 6 states and 147 transitions. [2024-06-20 16:28:42,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 139 transitions, 1389 flow [2024-06-20 16:28:42,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 139 transitions, 1238 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 16:28:42,709 INFO L231 Difference]: Finished difference. Result has 102 places, 119 transitions, 975 flow [2024-06-20 16:28:42,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=975, PETRI_PLACES=102, PETRI_TRANSITIONS=119} [2024-06-20 16:28:42,709 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 48 predicate places. [2024-06-20 16:28:42,710 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 119 transitions, 975 flow [2024-06-20 16:28:42,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:42,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:42,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:42,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:28:42,710 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:42,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:42,711 INFO L85 PathProgramCache]: Analyzing trace with hash -905856841, now seen corresponding path program 1 times [2024-06-20 16:28:42,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:42,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987286959] [2024-06-20 16:28:42,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:42,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:43,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:43,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987286959] [2024-06-20 16:28:43,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987286959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:43,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:43,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:28:43,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022382358] [2024-06-20 16:28:43,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:43,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:28:43,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:43,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:28:43,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:28:43,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-20 16:28:43,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 119 transitions, 975 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:43,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:43,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-20 16:28:43,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:44,837 INFO L124 PetriNetUnfolderBase]: 7453/10806 cut-off events. [2024-06-20 16:28:44,838 INFO L125 PetriNetUnfolderBase]: For 132962/132962 co-relation queries the response was YES. [2024-06-20 16:28:44,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52179 conditions, 10806 events. 7453/10806 cut-off events. For 132962/132962 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 61645 event pairs, 2905 based on Foata normal form. 4/10802 useless extension candidates. Maximal degree in co-relation 52140. Up to 10202 conditions per place. [2024-06-20 16:28:44,931 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 124 selfloop transitions, 21 changer transitions 0/153 dead transitions. [2024-06-20 16:28:44,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 153 transitions, 1477 flow [2024-06-20 16:28:44,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:28:44,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:28:44,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-20 16:28:44,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163398692810458 [2024-06-20 16:28:44,933 INFO L175 Difference]: Start difference. First operand has 102 places, 119 transitions, 975 flow. Second operand 6 states and 158 transitions. [2024-06-20 16:28:44,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 153 transitions, 1477 flow [2024-06-20 16:28:45,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 153 transitions, 1418 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 16:28:45,031 INFO L231 Difference]: Finished difference. Result has 103 places, 127 transitions, 1059 flow [2024-06-20 16:28:45,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1059, PETRI_PLACES=103, PETRI_TRANSITIONS=127} [2024-06-20 16:28:45,032 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2024-06-20 16:28:45,032 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 127 transitions, 1059 flow [2024-06-20 16:28:45,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:45,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:45,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:45,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:28:45,033 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)] === [2024-06-20 16:28:45,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:45,033 INFO L85 PathProgramCache]: Analyzing trace with hash 325016759, now seen corresponding path program 2 times [2024-06-20 16:28:45,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:45,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943132593] [2024-06-20 16:28:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:45,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:45,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:45,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943132593] [2024-06-20 16:28:45,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943132593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:45,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:45,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:28:45,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814812849] [2024-06-20 16:28:45,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:45,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:28:45,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:45,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:28:45,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:28:45,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-20 16:28:45,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 127 transitions, 1059 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:45,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:45,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-20 16:28:45,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:47,099 INFO L124 PetriNetUnfolderBase]: 7439/10794 cut-off events. [2024-06-20 16:28:47,100 INFO L125 PetriNetUnfolderBase]: For 149528/149534 co-relation queries the response was YES. [2024-06-20 16:28:47,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54379 conditions, 10794 events. 7439/10794 cut-off events. For 149528/149534 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 61669 event pairs, 2888 based on Foata normal form. 8/10797 useless extension candidates. Maximal degree in co-relation 54339. Up to 10190 conditions per place. [2024-06-20 16:28:47,194 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 118 selfloop transitions, 21 changer transitions 0/147 dead transitions. [2024-06-20 16:28:47,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 147 transitions, 1387 flow [2024-06-20 16:28:47,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:28:47,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:28:47,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 16:28:47,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49673202614379086 [2024-06-20 16:28:47,195 INFO L175 Difference]: Start difference. First operand has 103 places, 127 transitions, 1059 flow. Second operand 6 states and 152 transitions. [2024-06-20 16:28:47,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 147 transitions, 1387 flow [2024-06-20 16:28:47,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 147 transitions, 1317 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-20 16:28:47,332 INFO L231 Difference]: Finished difference. Result has 107 places, 127 transitions, 1040 flow [2024-06-20 16:28:47,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1040, PETRI_PLACES=107, PETRI_TRANSITIONS=127} [2024-06-20 16:28:47,333 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 53 predicate places. [2024-06-20 16:28:47,333 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 127 transitions, 1040 flow [2024-06-20 16:28:47,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:47,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:47,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:47,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:28:47,334 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:47,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:47,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1113253575, now seen corresponding path program 1 times [2024-06-20 16:28:47,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:47,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712739608] [2024-06-20 16:28:47,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:47,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:48,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:48,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712739608] [2024-06-20 16:28:48,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712739608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:48,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:48,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:28:48,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315240374] [2024-06-20 16:28:48,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:48,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:28:48,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:48,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:28:48,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:28:48,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:28:48,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 127 transitions, 1040 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:48,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:48,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:28:48,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:49,811 INFO L124 PetriNetUnfolderBase]: 8699/12292 cut-off events. [2024-06-20 16:28:49,811 INFO L125 PetriNetUnfolderBase]: For 193396/193402 co-relation queries the response was YES. [2024-06-20 16:28:49,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63399 conditions, 12292 events. 8699/12292 cut-off events. For 193396/193402 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 68347 event pairs, 3389 based on Foata normal form. 12/12292 useless extension candidates. Maximal degree in co-relation 63357. Up to 11483 conditions per place. [2024-06-20 16:28:49,903 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 128 selfloop transitions, 52 changer transitions 0/187 dead transitions. [2024-06-20 16:28:49,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 187 transitions, 1838 flow [2024-06-20 16:28:49,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:28:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:28:49,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-20 16:28:49,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5378151260504201 [2024-06-20 16:28:49,905 INFO L175 Difference]: Start difference. First operand has 107 places, 127 transitions, 1040 flow. Second operand 7 states and 192 transitions. [2024-06-20 16:28:49,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 187 transitions, 1838 flow [2024-06-20 16:28:50,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 187 transitions, 1783 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 16:28:50,063 INFO L231 Difference]: Finished difference. Result has 111 places, 145 transitions, 1350 flow [2024-06-20 16:28:50,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1350, PETRI_PLACES=111, PETRI_TRANSITIONS=145} [2024-06-20 16:28:50,064 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 57 predicate places. [2024-06-20 16:28:50,064 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 145 transitions, 1350 flow [2024-06-20 16:28:50,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:50,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:50,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:50,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:28:50,065 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:50,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:50,065 INFO L85 PathProgramCache]: Analyzing trace with hash 480190040, now seen corresponding path program 1 times [2024-06-20 16:28:50,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:50,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836962503] [2024-06-20 16:28:50,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:50,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:50,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:50,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836962503] [2024-06-20 16:28:50,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836962503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:50,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:50,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:50,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929718374] [2024-06-20 16:28:50,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:50,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:50,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:50,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:50,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:50,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:28:50,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 145 transitions, 1350 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) [2024-06-20 16:28:50,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:50,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:28:50,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:52,758 INFO L124 PetriNetUnfolderBase]: 8941/12666 cut-off events. [2024-06-20 16:28:52,758 INFO L125 PetriNetUnfolderBase]: For 225986/225989 co-relation queries the response was YES. [2024-06-20 16:28:52,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69322 conditions, 12666 events. 8941/12666 cut-off events. For 225986/225989 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 71186 event pairs, 3495 based on Foata normal form. 18/12667 useless extension candidates. Maximal degree in co-relation 69277. Up to 11555 conditions per place. [2024-06-20 16:28:52,863 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 142 selfloop transitions, 53 changer transitions 0/202 dead transitions. [2024-06-20 16:28:52,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 202 transitions, 1973 flow [2024-06-20 16:28:52,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:28:52,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:28:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-20 16:28:52,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5171568627450981 [2024-06-20 16:28:52,865 INFO L175 Difference]: Start difference. First operand has 111 places, 145 transitions, 1350 flow. Second operand 8 states and 211 transitions. [2024-06-20 16:28:52,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 202 transitions, 1973 flow [2024-06-20 16:28:53,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 202 transitions, 1871 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-20 16:28:53,065 INFO L231 Difference]: Finished difference. Result has 118 places, 154 transitions, 1513 flow [2024-06-20 16:28:53,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1513, PETRI_PLACES=118, PETRI_TRANSITIONS=154} [2024-06-20 16:28:53,066 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 64 predicate places. [2024-06-20 16:28:53,066 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 154 transitions, 1513 flow [2024-06-20 16:28:53,066 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) [2024-06-20 16:28:53,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:53,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:53,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:28:53,067 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:53,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:53,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1635191559, now seen corresponding path program 2 times [2024-06-20 16:28:53,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:53,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195982148] [2024-06-20 16:28:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:53,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:53,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:53,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195982148] [2024-06-20 16:28:53,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195982148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:53,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:53,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:28:53,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281760339] [2024-06-20 16:28:53,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:53,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:28:53,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:53,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:28:53,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:28:53,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:28:53,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 154 transitions, 1513 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:53,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:53,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:28:53,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:55,643 INFO L124 PetriNetUnfolderBase]: 9107/12916 cut-off events. [2024-06-20 16:28:55,644 INFO L125 PetriNetUnfolderBase]: For 242158/242164 co-relation queries the response was YES. [2024-06-20 16:28:55,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71640 conditions, 12916 events. 9107/12916 cut-off events. For 242158/242164 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 72636 event pairs, 3437 based on Foata normal form. 12/12917 useless extension candidates. Maximal degree in co-relation 71592. Up to 11973 conditions per place. [2024-06-20 16:28:55,757 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 135 selfloop transitions, 58 changer transitions 0/200 dead transitions. [2024-06-20 16:28:55,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 200 transitions, 2273 flow [2024-06-20 16:28:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:28:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:28:55,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-20 16:28:55,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210084033613446 [2024-06-20 16:28:55,759 INFO L175 Difference]: Start difference. First operand has 118 places, 154 transitions, 1513 flow. Second operand 7 states and 186 transitions. [2024-06-20 16:28:55,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 200 transitions, 2273 flow [2024-06-20 16:28:56,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 200 transitions, 2185 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 16:28:56,024 INFO L231 Difference]: Finished difference. Result has 123 places, 164 transitions, 1699 flow [2024-06-20 16:28:56,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1699, PETRI_PLACES=123, PETRI_TRANSITIONS=164} [2024-06-20 16:28:56,025 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 69 predicate places. [2024-06-20 16:28:56,025 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 164 transitions, 1699 flow [2024-06-20 16:28:56,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:56,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:56,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:56,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:28:56,026 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:56,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:56,026 INFO L85 PathProgramCache]: Analyzing trace with hash 631870854, now seen corresponding path program 2 times [2024-06-20 16:28:56,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:56,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355839210] [2024-06-20 16:28:56,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:56,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:56,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:56,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355839210] [2024-06-20 16:28:56,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355839210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:56,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:56,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:56,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902898652] [2024-06-20 16:28:56,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:56,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:56,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:56,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:56,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:56,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:28:56,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 164 transitions, 1699 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) [2024-06-20 16:28:56,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:56,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:28:56,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:58,524 INFO L124 PetriNetUnfolderBase]: 9068/12841 cut-off events. [2024-06-20 16:28:58,525 INFO L125 PetriNetUnfolderBase]: For 259135/259138 co-relation queries the response was YES. [2024-06-20 16:28:58,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71978 conditions, 12841 events. 9068/12841 cut-off events. For 259135/259138 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 71984 event pairs, 2539 based on Foata normal form. 18/12832 useless extension candidates. Maximal degree in co-relation 71928. Up to 11036 conditions per place. [2024-06-20 16:28:58,640 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 138 selfloop transitions, 61 changer transitions 0/206 dead transitions. [2024-06-20 16:28:58,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 206 transitions, 2217 flow [2024-06-20 16:28:58,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:28:58,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:28:58,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-20 16:28:58,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266106442577031 [2024-06-20 16:28:58,642 INFO L175 Difference]: Start difference. First operand has 123 places, 164 transitions, 1699 flow. Second operand 7 states and 188 transitions. [2024-06-20 16:28:58,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 206 transitions, 2217 flow [2024-06-20 16:28:58,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 206 transitions, 2095 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-20 16:28:58,978 INFO L231 Difference]: Finished difference. Result has 127 places, 164 transitions, 1712 flow [2024-06-20 16:28:58,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1712, PETRI_PLACES=127, PETRI_TRANSITIONS=164} [2024-06-20 16:28:58,979 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 73 predicate places. [2024-06-20 16:28:58,979 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 164 transitions, 1712 flow [2024-06-20 16:28:58,979 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) [2024-06-20 16:28:58,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:58,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:58,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:28:58,980 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:58,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:58,980 INFO L85 PathProgramCache]: Analyzing trace with hash 921099850, now seen corresponding path program 3 times [2024-06-20 16:28:58,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:58,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033718831] [2024-06-20 16:28:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:58,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:59,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:59,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033718831] [2024-06-20 16:28:59,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033718831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:59,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:59,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:59,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951105301] [2024-06-20 16:28:59,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:59,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:59,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:59,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:59,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:59,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:28:59,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 164 transitions, 1712 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) [2024-06-20 16:28:59,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:59,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:28:59,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:01,510 INFO L124 PetriNetUnfolderBase]: 9029/12798 cut-off events. [2024-06-20 16:29:01,510 INFO L125 PetriNetUnfolderBase]: For 274301/274304 co-relation queries the response was YES. [2024-06-20 16:29:01,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72125 conditions, 12798 events. 9029/12798 cut-off events. For 274301/274304 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 71833 event pairs, 2137 based on Foata normal form. 18/12790 useless extension candidates. Maximal degree in co-relation 72074. Up to 10797 conditions per place. [2024-06-20 16:29:01,627 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 132 selfloop transitions, 63 changer transitions 0/202 dead transitions. [2024-06-20 16:29:01,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 202 transitions, 2216 flow [2024-06-20 16:29:01,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:01,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:01,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 16:29:01,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2024-06-20 16:29:01,629 INFO L175 Difference]: Start difference. First operand has 127 places, 164 transitions, 1712 flow. Second operand 7 states and 181 transitions. [2024-06-20 16:29:01,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 202 transitions, 2216 flow [2024-06-20 16:29:01,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 202 transitions, 2054 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:01,857 INFO L231 Difference]: Finished difference. Result has 127 places, 165 transitions, 1695 flow [2024-06-20 16:29:01,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1695, PETRI_PLACES=127, PETRI_TRANSITIONS=165} [2024-06-20 16:29:01,858 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 73 predicate places. [2024-06-20 16:29:01,858 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 165 transitions, 1695 flow [2024-06-20 16:29:01,858 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) [2024-06-20 16:29:01,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:01,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:01,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:29:01,859 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:29:01,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:01,859 INFO L85 PathProgramCache]: Analyzing trace with hash 266353725, now seen corresponding path program 3 times [2024-06-20 16:29:01,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:01,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506556563] [2024-06-20 16:29:01,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:01,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:02,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:02,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506556563] [2024-06-20 16:29:02,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506556563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:02,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:02,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:02,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700909168] [2024-06-20 16:29:02,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:02,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:02,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:02,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:02,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:02,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:29:02,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 165 transitions, 1695 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:02,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:02,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:29:02,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:04,419 INFO L124 PetriNetUnfolderBase]: 9011/12761 cut-off events. [2024-06-20 16:29:04,420 INFO L125 PetriNetUnfolderBase]: For 273414/273435 co-relation queries the response was YES. [2024-06-20 16:29:04,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72310 conditions, 12761 events. 9011/12761 cut-off events. For 273414/273435 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 71382 event pairs, 3423 based on Foata normal form. 22/12765 useless extension candidates. Maximal degree in co-relation 72258. Up to 11851 conditions per place. [2024-06-20 16:29:04,523 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 129 selfloop transitions, 58 changer transitions 0/194 dead transitions. [2024-06-20 16:29:04,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 194 transitions, 2315 flow [2024-06-20 16:29:04,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:04,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:04,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 16:29:04,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014005602240896 [2024-06-20 16:29:04,525 INFO L175 Difference]: Start difference. First operand has 127 places, 165 transitions, 1695 flow. Second operand 7 states and 179 transitions. [2024-06-20 16:29:04,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 194 transitions, 2315 flow [2024-06-20 16:29:04,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 194 transitions, 2140 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 16:29:04,737 INFO L231 Difference]: Finished difference. Result has 129 places, 165 transitions, 1647 flow [2024-06-20 16:29:04,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1647, PETRI_PLACES=129, PETRI_TRANSITIONS=165} [2024-06-20 16:29:04,737 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 75 predicate places. [2024-06-20 16:29:04,738 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 165 transitions, 1647 flow [2024-06-20 16:29:04,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:04,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:04,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:04,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:29:04,738 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)] === [2024-06-20 16:29:04,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:04,739 INFO L85 PathProgramCache]: Analyzing trace with hash 375154463, now seen corresponding path program 1 times [2024-06-20 16:29:04,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:04,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774920303] [2024-06-20 16:29:04,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:04,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:05,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:05,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774920303] [2024-06-20 16:29:05,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774920303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:05,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:05,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:05,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668722603] [2024-06-20 16:29:05,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:05,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:05,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:05,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:05,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:05,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-20 16:29:05,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 165 transitions, 1647 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:05,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:05,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-20 16:29:05,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:07,130 INFO L124 PetriNetUnfolderBase]: 7893/11488 cut-off events. [2024-06-20 16:29:07,131 INFO L125 PetriNetUnfolderBase]: For 242017/242017 co-relation queries the response was YES. [2024-06-20 16:29:07,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64273 conditions, 11488 events. 7893/11488 cut-off events. For 242017/242017 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 66621 event pairs, 2912 based on Foata normal form. 4/11487 useless extension candidates. Maximal degree in co-relation 64220. Up to 10846 conditions per place. [2024-06-20 16:29:07,248 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 172 selfloop transitions, 18 changer transitions 0/198 dead transitions. [2024-06-20 16:29:07,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 198 transitions, 2153 flow [2024-06-20 16:29:07,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:07,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:07,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 16:29:07,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49299719887955185 [2024-06-20 16:29:07,250 INFO L175 Difference]: Start difference. First operand has 129 places, 165 transitions, 1647 flow. Second operand 7 states and 176 transitions. [2024-06-20 16:29:07,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 198 transitions, 2153 flow [2024-06-20 16:29:07,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 198 transitions, 1994 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:07,464 INFO L231 Difference]: Finished difference. Result has 130 places, 169 transitions, 1593 flow [2024-06-20 16:29:07,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1593, PETRI_PLACES=130, PETRI_TRANSITIONS=169} [2024-06-20 16:29:07,465 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 76 predicate places. [2024-06-20 16:29:07,465 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 169 transitions, 1593 flow [2024-06-20 16:29:07,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:07,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:07,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:07,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:29:07,466 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)] === [2024-06-20 16:29:07,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:07,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1812507777, now seen corresponding path program 2 times [2024-06-20 16:29:07,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:07,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426356404] [2024-06-20 16:29:07,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:07,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:08,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:08,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:08,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426356404] [2024-06-20 16:29:08,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426356404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:08,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:08,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:08,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028435003] [2024-06-20 16:29:08,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:08,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:08,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:08,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:08,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:08,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-20 16:29:08,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 169 transitions, 1593 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:08,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:08,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-20 16:29:08,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:09,948 INFO L124 PetriNetUnfolderBase]: 7925/11554 cut-off events. [2024-06-20 16:29:09,948 INFO L125 PetriNetUnfolderBase]: For 260813/260813 co-relation queries the response was YES. [2024-06-20 16:29:10,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65928 conditions, 11554 events. 7925/11554 cut-off events. For 260813/260813 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 67037 event pairs, 2860 based on Foata normal form. 4/11548 useless extension candidates. Maximal degree in co-relation 65876. Up to 10777 conditions per place. [2024-06-20 16:29:10,057 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 165 selfloop transitions, 35 changer transitions 0/208 dead transitions. [2024-06-20 16:29:10,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 208 transitions, 2285 flow [2024-06-20 16:29:10,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:10,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:10,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 16:29:10,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-06-20 16:29:10,060 INFO L175 Difference]: Start difference. First operand has 130 places, 169 transitions, 1593 flow. Second operand 7 states and 182 transitions. [2024-06-20 16:29:10,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 208 transitions, 2285 flow [2024-06-20 16:29:10,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 208 transitions, 2210 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 16:29:10,281 INFO L231 Difference]: Finished difference. Result has 132 places, 177 transitions, 1725 flow [2024-06-20 16:29:10,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1725, PETRI_PLACES=132, PETRI_TRANSITIONS=177} [2024-06-20 16:29:10,282 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 78 predicate places. [2024-06-20 16:29:10,282 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 177 transitions, 1725 flow [2024-06-20 16:29:10,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:10,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:10,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:10,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:29:10,283 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:29:10,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:10,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1485586143, now seen corresponding path program 3 times [2024-06-20 16:29:10,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:10,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745642511] [2024-06-20 16:29:10,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:10,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:11,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:11,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745642511] [2024-06-20 16:29:11,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745642511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:11,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:11,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:11,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617819995] [2024-06-20 16:29:11,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:11,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:11,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:11,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:11,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:11,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-20 16:29:11,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 177 transitions, 1725 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:11,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:11,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-20 16:29:11,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:12,827 INFO L124 PetriNetUnfolderBase]: 7911/11538 cut-off events. [2024-06-20 16:29:12,827 INFO L125 PetriNetUnfolderBase]: For 283495/283498 co-relation queries the response was YES. [2024-06-20 16:29:12,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68035 conditions, 11538 events. 7911/11538 cut-off events. For 283495/283498 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 66864 event pairs, 2830 based on Foata normal form. 4/11535 useless extension candidates. Maximal degree in co-relation 67982. Up to 10765 conditions per place. [2024-06-20 16:29:12,928 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 159 selfloop transitions, 35 changer transitions 0/202 dead transitions. [2024-06-20 16:29:12,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 202 transitions, 2175 flow [2024-06-20 16:29:12,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:12,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 16:29:12,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49299719887955185 [2024-06-20 16:29:12,930 INFO L175 Difference]: Start difference. First operand has 132 places, 177 transitions, 1725 flow. Second operand 7 states and 176 transitions. [2024-06-20 16:29:12,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 202 transitions, 2175 flow [2024-06-20 16:29:13,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 202 transitions, 2067 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-20 16:29:13,185 INFO L231 Difference]: Finished difference. Result has 136 places, 177 transitions, 1696 flow [2024-06-20 16:29:13,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1696, PETRI_PLACES=136, PETRI_TRANSITIONS=177} [2024-06-20 16:29:13,186 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 82 predicate places. [2024-06-20 16:29:13,186 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 177 transitions, 1696 flow [2024-06-20 16:29:13,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:13,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:13,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:13,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:29:13,187 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)] === [2024-06-20 16:29:13,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:13,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1989885561, now seen corresponding path program 1 times [2024-06-20 16:29:13,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:13,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172126147] [2024-06-20 16:29:13,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:13,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:14,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:14,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172126147] [2024-06-20 16:29:14,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172126147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:14,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:14,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:14,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122773401] [2024-06-20 16:29:14,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:14,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:14,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:14,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:14,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:14,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-20 16:29:14,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 177 transitions, 1696 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:14,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:14,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-20 16:29:14,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:16,092 INFO L124 PetriNetUnfolderBase]: 7899/11526 cut-off events. [2024-06-20 16:29:16,092 INFO L125 PetriNetUnfolderBase]: For 299010/299010 co-relation queries the response was YES. [2024-06-20 16:29:16,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68096 conditions, 11526 events. 7899/11526 cut-off events. For 299010/299010 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 66977 event pairs, 2850 based on Foata normal form. 4/11527 useless extension candidates. Maximal degree in co-relation 68041. Up to 10866 conditions per place. [2024-06-20 16:29:16,178 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 182 selfloop transitions, 17 changer transitions 0/207 dead transitions. [2024-06-20 16:29:16,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 207 transitions, 2248 flow [2024-06-20 16:29:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:16,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 16:29:16,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4733893557422969 [2024-06-20 16:29:16,179 INFO L175 Difference]: Start difference. First operand has 136 places, 177 transitions, 1696 flow. Second operand 7 states and 169 transitions. [2024-06-20 16:29:16,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 207 transitions, 2248 flow [2024-06-20 16:29:16,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 207 transitions, 2131 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 16:29:16,431 INFO L231 Difference]: Finished difference. Result has 137 places, 184 transitions, 1730 flow [2024-06-20 16:29:16,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1730, PETRI_PLACES=137, PETRI_TRANSITIONS=184} [2024-06-20 16:29:16,432 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 83 predicate places. [2024-06-20 16:29:16,432 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 184 transitions, 1730 flow [2024-06-20 16:29:16,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:16,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:16,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:16,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:29:16,433 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:29:16,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:16,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1146475545, now seen corresponding path program 1 times [2024-06-20 16:29:16,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:16,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802746130] [2024-06-20 16:29:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:16,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:17,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:17,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802746130] [2024-06-20 16:29:17,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802746130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:17,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:17,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:29:17,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785574968] [2024-06-20 16:29:17,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:17,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:29:17,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:17,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:29:17,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:29:17,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-20 16:29:17,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 184 transitions, 1730 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:17,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:17,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-20 16:29:17,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:18,477 INFO L124 PetriNetUnfolderBase]: 7485/11166 cut-off events. [2024-06-20 16:29:18,478 INFO L125 PetriNetUnfolderBase]: For 310327/310463 co-relation queries the response was YES. [2024-06-20 16:29:18,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68315 conditions, 11166 events. 7485/11166 cut-off events. For 310327/310463 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 67266 event pairs, 2674 based on Foata normal form. 1/11048 useless extension candidates. Maximal degree in co-relation 68259. Up to 10224 conditions per place. [2024-06-20 16:29:18,580 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 169 selfloop transitions, 10 changer transitions 0/199 dead transitions. [2024-06-20 16:29:18,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 199 transitions, 2170 flow [2024-06-20 16:29:18,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:29:18,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:29:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-20 16:29:18,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-20 16:29:18,581 INFO L175 Difference]: Start difference. First operand has 137 places, 184 transitions, 1730 flow. Second operand 5 states and 125 transitions. [2024-06-20 16:29:18,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 199 transitions, 2170 flow [2024-06-20 16:29:18,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 199 transitions, 2088 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 16:29:18,879 INFO L231 Difference]: Finished difference. Result has 138 places, 188 transitions, 1737 flow [2024-06-20 16:29:18,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1648, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1737, PETRI_PLACES=138, PETRI_TRANSITIONS=188} [2024-06-20 16:29:18,879 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 84 predicate places. [2024-06-20 16:29:18,880 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 188 transitions, 1737 flow [2024-06-20 16:29:18,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:18,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:18,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:18,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:29:18,880 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:29:18,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:18,881 INFO L85 PathProgramCache]: Analyzing trace with hash -854378124, now seen corresponding path program 1 times [2024-06-20 16:29:18,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:18,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656878253] [2024-06-20 16:29:18,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:18,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:19,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:19,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656878253] [2024-06-20 16:29:19,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656878253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:19,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:19,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:19,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205261829] [2024-06-20 16:29:19,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:19,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:19,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:19,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:19,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:19,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:29:19,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 188 transitions, 1737 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:19,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:19,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:29:19,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:21,483 INFO L124 PetriNetUnfolderBase]: 9197/13025 cut-off events. [2024-06-20 16:29:21,483 INFO L125 PetriNetUnfolderBase]: For 404635/404644 co-relation queries the response was YES. [2024-06-20 16:29:21,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83203 conditions, 13025 events. 9197/13025 cut-off events. For 404635/404644 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 72918 event pairs, 3364 based on Foata normal form. 12/13029 useless extension candidates. Maximal degree in co-relation 83146. Up to 11993 conditions per place. [2024-06-20 16:29:21,618 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 158 selfloop transitions, 75 changer transitions 0/240 dead transitions. [2024-06-20 16:29:21,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 240 transitions, 2707 flow [2024-06-20 16:29:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:21,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:21,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-20 16:29:21,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266106442577031 [2024-06-20 16:29:21,620 INFO L175 Difference]: Start difference. First operand has 138 places, 188 transitions, 1737 flow. Second operand 7 states and 188 transitions. [2024-06-20 16:29:21,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 240 transitions, 2707 flow [2024-06-20 16:29:22,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 240 transitions, 2646 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-20 16:29:22,007 INFO L231 Difference]: Finished difference. Result has 143 places, 201 transitions, 2042 flow [2024-06-20 16:29:22,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1676, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2042, PETRI_PLACES=143, PETRI_TRANSITIONS=201} [2024-06-20 16:29:22,008 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 89 predicate places. [2024-06-20 16:29:22,009 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 201 transitions, 2042 flow [2024-06-20 16:29:22,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:22,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:22,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:22,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:29:22,009 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:29:22,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:22,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1893276150, now seen corresponding path program 2 times [2024-06-20 16:29:22,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:22,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752047345] [2024-06-20 16:29:22,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:22,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:22,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:22,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:22,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752047345] [2024-06-20 16:29:22,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752047345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:22,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:22,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:22,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220340208] [2024-06-20 16:29:22,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:22,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:22,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:22,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:22,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:22,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:29:22,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 201 transitions, 2042 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:22,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:22,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:29:22,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:24,847 INFO L124 PetriNetUnfolderBase]: 9169/12985 cut-off events. [2024-06-20 16:29:24,847 INFO L125 PetriNetUnfolderBase]: For 423984/423993 co-relation queries the response was YES. [2024-06-20 16:29:24,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84443 conditions, 12985 events. 9169/12985 cut-off events. For 423984/423993 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 72693 event pairs, 3339 based on Foata normal form. 12/12989 useless extension candidates. Maximal degree in co-relation 84384. Up to 11973 conditions per place. [2024-06-20 16:29:24,980 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 159 selfloop transitions, 71 changer transitions 0/237 dead transitions. [2024-06-20 16:29:24,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 237 transitions, 2826 flow [2024-06-20 16:29:24,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:24,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:24,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-20 16:29:24,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182072829131653 [2024-06-20 16:29:24,982 INFO L175 Difference]: Start difference. First operand has 143 places, 201 transitions, 2042 flow. Second operand 7 states and 185 transitions. [2024-06-20 16:29:24,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 237 transitions, 2826 flow [2024-06-20 16:29:25,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 237 transitions, 2705 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-20 16:29:25,380 INFO L231 Difference]: Finished difference. Result has 147 places, 201 transitions, 2075 flow [2024-06-20 16:29:25,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2075, PETRI_PLACES=147, PETRI_TRANSITIONS=201} [2024-06-20 16:29:25,380 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 93 predicate places. [2024-06-20 16:29:25,381 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 201 transitions, 2075 flow [2024-06-20 16:29:25,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:25,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:25,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:25,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:29:25,381 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)] === [2024-06-20 16:29:25,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:25,382 INFO L85 PathProgramCache]: Analyzing trace with hash -60445024, now seen corresponding path program 3 times [2024-06-20 16:29:25,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:25,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967952362] [2024-06-20 16:29:25,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:25,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:26,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:26,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:26,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967952362] [2024-06-20 16:29:26,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967952362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:26,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:26,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:26,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368824791] [2024-06-20 16:29:26,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:26,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:26,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:26,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:26,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:26,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:29:26,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 201 transitions, 2075 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:26,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:26,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:29:26,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:28,134 INFO L124 PetriNetUnfolderBase]: 9145/12931 cut-off events. [2024-06-20 16:29:28,135 INFO L125 PetriNetUnfolderBase]: For 446130/446139 co-relation queries the response was YES. [2024-06-20 16:29:28,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84870 conditions, 12931 events. 9145/12931 cut-off events. For 446130/446139 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 72156 event pairs, 3375 based on Foata normal form. 8/12920 useless extension candidates. Maximal degree in co-relation 84810. Up to 11953 conditions per place. [2024-06-20 16:29:28,240 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 152 selfloop transitions, 78 changer transitions 0/237 dead transitions. [2024-06-20 16:29:28,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 237 transitions, 2867 flow [2024-06-20 16:29:28,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:28,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:28,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-20 16:29:28,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182072829131653 [2024-06-20 16:29:28,241 INFO L175 Difference]: Start difference. First operand has 147 places, 201 transitions, 2075 flow. Second operand 7 states and 185 transitions. [2024-06-20 16:29:28,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 237 transitions, 2867 flow [2024-06-20 16:29:28,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 237 transitions, 2710 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-20 16:29:28,567 INFO L231 Difference]: Finished difference. Result has 150 places, 201 transitions, 2083 flow [2024-06-20 16:29:28,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1918, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2083, PETRI_PLACES=150, PETRI_TRANSITIONS=201} [2024-06-20 16:29:28,568 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 96 predicate places. [2024-06-20 16:29:28,568 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 201 transitions, 2083 flow [2024-06-20 16:29:28,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:28,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:28,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:28,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:29:28,568 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)] === [2024-06-20 16:29:28,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:28,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2103856050, now seen corresponding path program 4 times [2024-06-20 16:29:28,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:28,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419382021] [2024-06-20 16:29:28,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:28,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:29,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:29,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419382021] [2024-06-20 16:29:29,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419382021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:29,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:29,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:29,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972426198] [2024-06-20 16:29:29,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:29,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:29,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:29,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:29,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:29,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:29:29,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 201 transitions, 2083 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:29,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:29,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:29:29,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:31,428 INFO L124 PetriNetUnfolderBase]: 9177/12978 cut-off events. [2024-06-20 16:29:31,429 INFO L125 PetriNetUnfolderBase]: For 470429/470438 co-relation queries the response was YES. [2024-06-20 16:29:31,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85961 conditions, 12978 events. 9177/12978 cut-off events. For 470429/470438 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 72544 event pairs, 3382 based on Foata normal form. 8/12967 useless extension candidates. Maximal degree in co-relation 85900. Up to 11972 conditions per place. [2024-06-20 16:29:31,526 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 147 selfloop transitions, 82 changer transitions 0/236 dead transitions. [2024-06-20 16:29:31,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 236 transitions, 2820 flow [2024-06-20 16:29:31,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:31,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:31,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 16:29:31,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2024-06-20 16:29:31,528 INFO L175 Difference]: Start difference. First operand has 150 places, 201 transitions, 2083 flow. Second operand 7 states and 181 transitions. [2024-06-20 16:29:31,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 236 transitions, 2820 flow [2024-06-20 16:29:31,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 236 transitions, 2479 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-20 16:29:31,966 INFO L231 Difference]: Finished difference. Result has 148 places, 205 transitions, 1988 flow [2024-06-20 16:29:31,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1761, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1988, PETRI_PLACES=148, PETRI_TRANSITIONS=205} [2024-06-20 16:29:31,967 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 94 predicate places. [2024-06-20 16:29:31,967 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 205 transitions, 1988 flow [2024-06-20 16:29:31,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:31,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:31,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:31,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:29:31,968 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)] === [2024-06-20 16:29:31,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:31,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1191476522, now seen corresponding path program 5 times [2024-06-20 16:29:31,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:31,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295488130] [2024-06-20 16:29:31,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:31,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:32,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:32,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295488130] [2024-06-20 16:29:32,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295488130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:32,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:32,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:32,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235320046] [2024-06-20 16:29:32,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:32,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:32,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:32,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:32,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:32,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:29:32,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 205 transitions, 1988 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:32,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:32,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:29:32,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:34,685 INFO L124 PetriNetUnfolderBase]: 9163/12968 cut-off events. [2024-06-20 16:29:34,686 INFO L125 PetriNetUnfolderBase]: For 489257/489272 co-relation queries the response was YES. [2024-06-20 16:29:34,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86050 conditions, 12968 events. 9163/12968 cut-off events. For 489257/489272 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 72570 event pairs, 3348 based on Foata normal form. 14/12964 useless extension candidates. Maximal degree in co-relation 85989. Up to 11964 conditions per place. [2024-06-20 16:29:34,827 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 148 selfloop transitions, 77 changer transitions 0/232 dead transitions. [2024-06-20 16:29:34,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 232 transitions, 2636 flow [2024-06-20 16:29:34,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:34,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:34,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 16:29:34,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49299719887955185 [2024-06-20 16:29:34,829 INFO L175 Difference]: Start difference. First operand has 148 places, 205 transitions, 1988 flow. Second operand 7 states and 176 transitions. [2024-06-20 16:29:34,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 232 transitions, 2636 flow [2024-06-20 16:29:35,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 232 transitions, 2468 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-20 16:29:35,275 INFO L231 Difference]: Finished difference. Result has 151 places, 205 transitions, 1983 flow [2024-06-20 16:29:35,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1983, PETRI_PLACES=151, PETRI_TRANSITIONS=205} [2024-06-20 16:29:35,276 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 97 predicate places. [2024-06-20 16:29:35,276 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 205 transitions, 1983 flow [2024-06-20 16:29:35,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:35,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:35,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:35,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:29:35,277 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)] === [2024-06-20 16:29:35,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:35,277 INFO L85 PathProgramCache]: Analyzing trace with hash -332964098, now seen corresponding path program 6 times [2024-06-20 16:29:35,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:35,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965752160] [2024-06-20 16:29:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:35,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:36,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:36,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965752160] [2024-06-20 16:29:36,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965752160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:36,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:36,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:36,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471485764] [2024-06-20 16:29:36,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:36,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:36,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:36,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:36,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:36,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:29:36,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 205 transitions, 1983 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:36,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:36,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:29:36,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:37,846 INFO L124 PetriNetUnfolderBase]: 9125/12914 cut-off events. [2024-06-20 16:29:37,846 INFO L125 PetriNetUnfolderBase]: For 512272/512287 co-relation queries the response was YES. [2024-06-20 16:29:37,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86223 conditions, 12914 events. 9125/12914 cut-off events. For 512272/512287 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 72222 event pairs, 3346 based on Foata normal form. 18/12914 useless extension candidates. Maximal degree in co-relation 86161. Up to 11932 conditions per place. [2024-06-20 16:29:37,978 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 150 selfloop transitions, 73 changer transitions 0/230 dead transitions. [2024-06-20 16:29:37,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 230 transitions, 2497 flow [2024-06-20 16:29:37,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:29:37,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:29:37,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 16:29:37,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-20 16:29:37,980 INFO L175 Difference]: Start difference. First operand has 151 places, 205 transitions, 1983 flow. Second operand 7 states and 175 transitions. [2024-06-20 16:29:37,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 230 transitions, 2497 flow [2024-06-20 16:29:38,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 230 transitions, 2306 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 16:29:38,447 INFO L231 Difference]: Finished difference. Result has 153 places, 205 transitions, 1949 flow [2024-06-20 16:29:38,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1792, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1949, PETRI_PLACES=153, PETRI_TRANSITIONS=205} [2024-06-20 16:29:38,448 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 99 predicate places. [2024-06-20 16:29:38,448 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 205 transitions, 1949 flow [2024-06-20 16:29:38,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:38,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:38,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:38,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:29:38,448 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)] === [2024-06-20 16:29:38,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:38,449 INFO L85 PathProgramCache]: Analyzing trace with hash -951306784, now seen corresponding path program 1 times [2024-06-20 16:29:38,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:38,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939695443] [2024-06-20 16:29:38,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:38,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:39,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:39,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939695443] [2024-06-20 16:29:39,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939695443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:39,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:39,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:39,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774075771] [2024-06-20 16:29:39,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:39,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:39,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:39,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:39,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:39,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:29:39,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 205 transitions, 1949 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:39,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:39,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:29:39,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:41,370 INFO L124 PetriNetUnfolderBase]: 10531/14974 cut-off events. [2024-06-20 16:29:41,370 INFO L125 PetriNetUnfolderBase]: For 591819/591840 co-relation queries the response was YES. [2024-06-20 16:29:41,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99074 conditions, 14974 events. 10531/14974 cut-off events. For 591819/591840 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 85697 event pairs, 3400 based on Foata normal form. 48/15014 useless extension candidates. Maximal degree in co-relation 99011. Up to 12710 conditions per place. [2024-06-20 16:29:41,525 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 204 selfloop transitions, 154 changer transitions 0/365 dead transitions. [2024-06-20 16:29:41,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 365 transitions, 4085 flow [2024-06-20 16:29:41,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:29:41,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:29:41,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-06-20 16:29:41,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381263616557734 [2024-06-20 16:29:41,527 INFO L175 Difference]: Start difference. First operand has 153 places, 205 transitions, 1949 flow. Second operand 9 states and 247 transitions. [2024-06-20 16:29:41,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 365 transitions, 4085 flow [2024-06-20 16:29:42,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 365 transitions, 3736 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 16:29:42,325 INFO L231 Difference]: Finished difference. Result has 159 places, 293 transitions, 3088 flow [2024-06-20 16:29:42,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1768, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3088, PETRI_PLACES=159, PETRI_TRANSITIONS=293} [2024-06-20 16:29:42,326 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 105 predicate places. [2024-06-20 16:29:42,326 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 293 transitions, 3088 flow [2024-06-20 16:29:42,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:42,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:42,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:42,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:29:42,327 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)] === [2024-06-20 16:29:42,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:42,328 INFO L85 PathProgramCache]: Analyzing trace with hash -834366684, now seen corresponding path program 2 times [2024-06-20 16:29:42,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:42,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412915071] [2024-06-20 16:29:42,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:42,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:43,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:43,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412915071] [2024-06-20 16:29:43,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412915071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:43,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:43,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:43,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149632688] [2024-06-20 16:29:43,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:43,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:43,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:43,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:43,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:43,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:29:43,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 293 transitions, 3088 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:43,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:43,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:29:43,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:45,898 INFO L124 PetriNetUnfolderBase]: 11011/15681 cut-off events. [2024-06-20 16:29:45,898 INFO L125 PetriNetUnfolderBase]: For 664813/664838 co-relation queries the response was YES. [2024-06-20 16:29:45,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108953 conditions, 15681 events. 11011/15681 cut-off events. For 664813/664838 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 90297 event pairs, 2941 based on Foata normal form. 52/15725 useless extension candidates. Maximal degree in co-relation 108885. Up to 12653 conditions per place. [2024-06-20 16:29:46,066 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 175 selfloop transitions, 175 changer transitions 0/357 dead transitions. [2024-06-20 16:29:46,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 357 transitions, 4286 flow [2024-06-20 16:29:46,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:46,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:46,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-20 16:29:46,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367647058823529 [2024-06-20 16:29:46,068 INFO L175 Difference]: Start difference. First operand has 159 places, 293 transitions, 3088 flow. Second operand 8 states and 219 transitions. [2024-06-20 16:29:46,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 357 transitions, 4286 flow [2024-06-20 16:29:47,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 357 transitions, 4227 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-20 16:29:47,061 INFO L231 Difference]: Finished difference. Result has 166 places, 301 transitions, 3588 flow [2024-06-20 16:29:47,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3029, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3588, PETRI_PLACES=166, PETRI_TRANSITIONS=301} [2024-06-20 16:29:47,062 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 112 predicate places. [2024-06-20 16:29:47,062 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 301 transitions, 3588 flow [2024-06-20 16:29:47,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:47,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:47,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:47,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:29:47,063 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:29:47,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:47,063 INFO L85 PathProgramCache]: Analyzing trace with hash -825795804, now seen corresponding path program 3 times [2024-06-20 16:29:47,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:47,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908360012] [2024-06-20 16:29:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:47,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:47,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:47,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908360012] [2024-06-20 16:29:47,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908360012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:47,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:47,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:47,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944893728] [2024-06-20 16:29:47,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:47,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:47,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:47,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:47,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:48,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:29:48,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 301 transitions, 3588 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:48,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:48,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:29:48,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:50,723 INFO L124 PetriNetUnfolderBase]: 11511/16385 cut-off events. [2024-06-20 16:29:50,723 INFO L125 PetriNetUnfolderBase]: For 757262/757287 co-relation queries the response was YES. [2024-06-20 16:29:50,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118424 conditions, 16385 events. 11511/16385 cut-off events. For 757262/757287 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 94953 event pairs, 3618 based on Foata normal form. 100/16477 useless extension candidates. Maximal degree in co-relation 118353. Up to 14200 conditions per place. [2024-06-20 16:29:51,353 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 185 selfloop transitions, 164 changer transitions 0/356 dead transitions. [2024-06-20 16:29:51,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 356 transitions, 4617 flow [2024-06-20 16:29:51,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:51,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-20 16:29:51,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5196078431372549 [2024-06-20 16:29:51,355 INFO L175 Difference]: Start difference. First operand has 166 places, 301 transitions, 3588 flow. Second operand 8 states and 212 transitions. [2024-06-20 16:29:51,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 356 transitions, 4617 flow [2024-06-20 16:29:52,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 356 transitions, 4365 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 16:29:52,301 INFO L231 Difference]: Finished difference. Result has 169 places, 307 transitions, 3843 flow [2024-06-20 16:29:52,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3338, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3843, PETRI_PLACES=169, PETRI_TRANSITIONS=307} [2024-06-20 16:29:52,302 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 115 predicate places. [2024-06-20 16:29:52,302 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 307 transitions, 3843 flow [2024-06-20 16:29:52,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:52,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:52,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:52,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:29:52,303 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:29:52,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:52,303 INFO L85 PathProgramCache]: Analyzing trace with hash 526299578, now seen corresponding path program 4 times [2024-06-20 16:29:52,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:52,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287665760] [2024-06-20 16:29:52,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:52,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:53,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:53,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287665760] [2024-06-20 16:29:53,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287665760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:53,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:53,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:53,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847475841] [2024-06-20 16:29:53,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:53,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:53,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:53,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:53,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:53,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:29:53,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 307 transitions, 3843 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:53,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:53,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:29:53,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:56,551 INFO L124 PetriNetUnfolderBase]: 11873/16879 cut-off events. [2024-06-20 16:29:56,551 INFO L125 PetriNetUnfolderBase]: For 754884/754895 co-relation queries the response was YES. [2024-06-20 16:29:56,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121969 conditions, 16879 events. 11873/16879 cut-off events. For 754884/754895 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 98110 event pairs, 3654 based on Foata normal form. 84/16955 useless extension candidates. Maximal degree in co-relation 121897. Up to 14714 conditions per place. [2024-06-20 16:29:56,723 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 201 selfloop transitions, 147 changer transitions 0/355 dead transitions. [2024-06-20 16:29:56,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 355 transitions, 4852 flow [2024-06-20 16:29:56,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:56,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:56,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-20 16:29:56,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049019607843137 [2024-06-20 16:29:56,725 INFO L175 Difference]: Start difference. First operand has 169 places, 307 transitions, 3843 flow. Second operand 8 states and 206 transitions. [2024-06-20 16:29:56,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 355 transitions, 4852 flow [2024-06-20 16:29:57,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 355 transitions, 4480 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:57,639 INFO L231 Difference]: Finished difference. Result has 171 places, 313 transitions, 3954 flow [2024-06-20 16:29:57,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3954, PETRI_PLACES=171, PETRI_TRANSITIONS=313} [2024-06-20 16:29:57,640 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 117 predicate places. [2024-06-20 16:29:57,641 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 313 transitions, 3954 flow [2024-06-20 16:29:57,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:57,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:57,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:57,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:29:57,641 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:29:57,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:57,642 INFO L85 PathProgramCache]: Analyzing trace with hash -545219082, now seen corresponding path program 1 times [2024-06-20 16:29:57,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:57,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678244004] [2024-06-20 16:29:57,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:57,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:58,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:58,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678244004] [2024-06-20 16:29:58,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678244004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:58,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:58,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:58,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083344471] [2024-06-20 16:29:58,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:58,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:58,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:58,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:58,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:58,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:29:58,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 313 transitions, 3954 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:58,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:58,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:29:58,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:01,728 INFO L124 PetriNetUnfolderBase]: 11937/16960 cut-off events. [2024-06-20 16:30:01,729 INFO L125 PetriNetUnfolderBase]: For 737254/737259 co-relation queries the response was YES. [2024-06-20 16:30:01,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122700 conditions, 16960 events. 11937/16960 cut-off events. For 737254/737259 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 98710 event pairs, 3894 based on Foata normal form. 8/16961 useless extension candidates. Maximal degree in co-relation 122627. Up to 15974 conditions per place. [2024-06-20 16:30:01,912 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 291 selfloop transitions, 61 changer transitions 0/359 dead transitions. [2024-06-20 16:30:01,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 359 transitions, 4876 flow [2024-06-20 16:30:01,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:01,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:01,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 16:30:01,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024509803921569 [2024-06-20 16:30:01,920 INFO L175 Difference]: Start difference. First operand has 171 places, 313 transitions, 3954 flow. Second operand 8 states and 205 transitions. [2024-06-20 16:30:01,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 359 transitions, 4876 flow [2024-06-20 16:30:03,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 359 transitions, 4526 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 16:30:03,058 INFO L231 Difference]: Finished difference. Result has 173 places, 318 transitions, 3826 flow [2024-06-20 16:30:03,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3604, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3826, PETRI_PLACES=173, PETRI_TRANSITIONS=318} [2024-06-20 16:30:03,067 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 119 predicate places. [2024-06-20 16:30:03,068 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 318 transitions, 3826 flow [2024-06-20 16:30:03,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:03,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:03,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:03,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:30:03,068 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:30:03,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:03,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1079107904, now seen corresponding path program 2 times [2024-06-20 16:30:03,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:03,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297412845] [2024-06-20 16:30:03,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:03,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:03,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:03,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297412845] [2024-06-20 16:30:03,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297412845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:03,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:03,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:03,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183444361] [2024-06-20 16:30:03,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:03,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:03,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:03,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:03,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:04,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:30:04,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 318 transitions, 3826 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:04,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:04,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:30:04,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:07,218 INFO L124 PetriNetUnfolderBase]: 12093/17187 cut-off events. [2024-06-20 16:30:07,218 INFO L125 PetriNetUnfolderBase]: For 767008/767016 co-relation queries the response was YES. [2024-06-20 16:30:07,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125563 conditions, 17187 events. 12093/17187 cut-off events. For 767008/767016 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 100300 event pairs, 3640 based on Foata normal form. 8/17185 useless extension candidates. Maximal degree in co-relation 125489. Up to 14801 conditions per place. [2024-06-20 16:30:07,430 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 205 selfloop transitions, 167 changer transitions 0/379 dead transitions. [2024-06-20 16:30:07,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 379 transitions, 5292 flow [2024-06-20 16:30:07,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:07,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:07,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-20 16:30:07,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5269607843137255 [2024-06-20 16:30:07,451 INFO L175 Difference]: Start difference. First operand has 173 places, 318 transitions, 3826 flow. Second operand 8 states and 215 transitions. [2024-06-20 16:30:07,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 379 transitions, 5292 flow [2024-06-20 16:30:08,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 379 transitions, 5052 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-20 16:30:08,544 INFO L231 Difference]: Finished difference. Result has 175 places, 332 transitions, 4237 flow [2024-06-20 16:30:08,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3586, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4237, PETRI_PLACES=175, PETRI_TRANSITIONS=332} [2024-06-20 16:30:08,545 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 121 predicate places. [2024-06-20 16:30:08,545 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 332 transitions, 4237 flow [2024-06-20 16:30:08,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:08,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:08,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:08,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:30:08,546 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:30:08,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:08,547 INFO L85 PathProgramCache]: Analyzing trace with hash -538785342, now seen corresponding path program 3 times [2024-06-20 16:30:08,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:08,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888051608] [2024-06-20 16:30:08,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:08,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:09,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:09,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888051608] [2024-06-20 16:30:09,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888051608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:09,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:09,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:09,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456817002] [2024-06-20 16:30:09,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:09,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:09,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:09,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:09,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:09,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:30:09,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 332 transitions, 4237 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:09,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:09,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:30:09,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:12,572 INFO L124 PetriNetUnfolderBase]: 12249/17444 cut-off events. [2024-06-20 16:30:12,573 INFO L125 PetriNetUnfolderBase]: For 833194/833202 co-relation queries the response was YES. [2024-06-20 16:30:12,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132385 conditions, 17444 events. 12249/17444 cut-off events. For 833194/833202 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 102423 event pairs, 3673 based on Foata normal form. 8/17442 useless extension candidates. Maximal degree in co-relation 132309. Up to 14917 conditions per place. [2024-06-20 16:30:12,757 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 211 selfloop transitions, 167 changer transitions 0/385 dead transitions. [2024-06-20 16:30:12,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 385 transitions, 5668 flow [2024-06-20 16:30:12,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-20 16:30:12,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5171568627450981 [2024-06-20 16:30:12,759 INFO L175 Difference]: Start difference. First operand has 175 places, 332 transitions, 4237 flow. Second operand 8 states and 211 transitions. [2024-06-20 16:30:12,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 385 transitions, 5668 flow [2024-06-20 16:30:14,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 385 transitions, 5486 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-20 16:30:14,050 INFO L231 Difference]: Finished difference. Result has 180 places, 341 transitions, 4585 flow [2024-06-20 16:30:14,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4081, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4585, PETRI_PLACES=180, PETRI_TRANSITIONS=341} [2024-06-20 16:30:14,051 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 126 predicate places. [2024-06-20 16:30:14,051 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 341 transitions, 4585 flow [2024-06-20 16:30:14,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:14,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:14,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:14,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:30:14,052 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:30:14,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:14,052 INFO L85 PathProgramCache]: Analyzing trace with hash -538539078, now seen corresponding path program 1 times [2024-06-20 16:30:14,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:14,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183481115] [2024-06-20 16:30:14,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:14,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:15,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:15,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183481115] [2024-06-20 16:30:15,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183481115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:15,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:15,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:15,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678987786] [2024-06-20 16:30:15,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:15,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:15,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:15,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:15,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:15,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:30:15,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 341 transitions, 4585 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:15,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:15,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:30:15,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:18,809 INFO L124 PetriNetUnfolderBase]: 12276/17464 cut-off events. [2024-06-20 16:30:18,809 INFO L125 PetriNetUnfolderBase]: For 865462/865475 co-relation queries the response was YES. [2024-06-20 16:30:18,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134371 conditions, 17464 events. 12276/17464 cut-off events. For 865462/865475 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 102194 event pairs, 3800 based on Foata normal form. 14/17473 useless extension candidates. Maximal degree in co-relation 134293. Up to 16703 conditions per place. [2024-06-20 16:30:19,134 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 340 selfloop transitions, 41 changer transitions 0/388 dead transitions. [2024-06-20 16:30:19,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 388 transitions, 5635 flow [2024-06-20 16:30:19,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:19,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:19,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 16:30:19,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47549019607843135 [2024-06-20 16:30:19,136 INFO L175 Difference]: Start difference. First operand has 180 places, 341 transitions, 4585 flow. Second operand 8 states and 194 transitions. [2024-06-20 16:30:19,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 388 transitions, 5635 flow [2024-06-20 16:30:20,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 388 transitions, 5375 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-20 16:30:20,330 INFO L231 Difference]: Finished difference. Result has 185 places, 350 transitions, 4587 flow [2024-06-20 16:30:20,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4328, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4587, PETRI_PLACES=185, PETRI_TRANSITIONS=350} [2024-06-20 16:30:20,331 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 131 predicate places. [2024-06-20 16:30:20,331 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 350 transitions, 4587 flow [2024-06-20 16:30:20,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:20,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:20,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:20,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:30:20,332 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:30:20,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:20,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2060716040, now seen corresponding path program 1 times [2024-06-20 16:30:20,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:20,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977838201] [2024-06-20 16:30:20,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:20,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:21,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:21,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:21,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977838201] [2024-06-20 16:30:21,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977838201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:21,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:21,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:30:21,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795965893] [2024-06-20 16:30:21,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:21,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:30:21,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:21,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:30:21,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:30:21,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-20 16:30:21,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 350 transitions, 4587 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:21,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:21,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-20 16:30:21,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:23,971 INFO L124 PetriNetUnfolderBase]: 11539/16703 cut-off events. [2024-06-20 16:30:23,971 INFO L125 PetriNetUnfolderBase]: For 891268/891478 co-relation queries the response was YES. [2024-06-20 16:30:24,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131006 conditions, 16703 events. 11539/16703 cut-off events. For 891268/891478 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 101588 event pairs, 3664 based on Foata normal form. 11/16531 useless extension candidates. Maximal degree in co-relation 130926. Up to 15503 conditions per place. [2024-06-20 16:30:24,159 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 314 selfloop transitions, 16 changer transitions 0/377 dead transitions. [2024-06-20 16:30:24,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 377 transitions, 5399 flow [2024-06-20 16:30:24,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:30:24,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:30:24,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 16:30:24,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869281045751634 [2024-06-20 16:30:24,160 INFO L175 Difference]: Start difference. First operand has 185 places, 350 transitions, 4587 flow. Second operand 6 states and 149 transitions. [2024-06-20 16:30:24,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 377 transitions, 5399 flow [2024-06-20 16:30:25,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 377 transitions, 5244 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-20 16:30:25,604 INFO L231 Difference]: Finished difference. Result has 186 places, 354 transitions, 4552 flow [2024-06-20 16:30:25,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4432, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4552, PETRI_PLACES=186, PETRI_TRANSITIONS=354} [2024-06-20 16:30:25,605 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 132 predicate places. [2024-06-20 16:30:25,605 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 354 transitions, 4552 flow [2024-06-20 16:30:25,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:25,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:25,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:25,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:30:25,606 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:30:25,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:25,606 INFO L85 PathProgramCache]: Analyzing trace with hash 605456582, now seen corresponding path program 5 times [2024-06-20 16:30:25,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:25,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551436185] [2024-06-20 16:30:25,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:25,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:26,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:26,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551436185] [2024-06-20 16:30:26,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551436185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:26,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:26,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:26,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018684564] [2024-06-20 16:30:26,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:26,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:26,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:26,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:26,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:26,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:30:26,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 354 transitions, 4552 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:26,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:26,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:30:26,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand