./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix021_tso.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix021_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix021_tso.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix021_tso.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:08:03,559 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:08:03,618 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:08:03,621 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:08:03,621 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:08:03,634 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:08:03,634 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:08:03,634 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:08:03,635 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:08:03,635 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:08:03,635 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:08:03,635 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:08:03,636 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:08:03,636 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:08:03,636 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:08:03,637 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:08:03,637 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:08:03,637 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:08:03,637 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:08:03,637 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:08:03,638 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:08:03,638 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:08:03,638 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:08:03,638 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:08:03,639 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:08:03,639 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:08:03,639 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:08:03,639 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:08:03,640 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:08:03,640 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:08:03,640 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:08:03,640 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:08:03,640 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:08:03,641 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:08:03,641 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:08:03,641 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:08:03,641 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:08:03,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:08:03,642 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:08:03,642 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:08:03,642 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:08:03,642 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:08:03,642 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:08:03,643 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:08:03,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:08:03,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:08:03,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:08:03,878 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:08:03,879 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:08:03,879 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix021_tso.oepc.yml/witness.yml [2024-06-14 12:08:04,141 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:08:04,142 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:08:04,143 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix021_tso.oepc.i [2024-06-14 12:08:05,157 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:08:05,400 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:08:05,401 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix021_tso.oepc.i [2024-06-14 12:08:05,420 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9d0d4cbc/fcfae92136cf429d84601042a8fd8235/FLAG4f8e4c912 [2024-06-14 12:08:05,434 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9d0d4cbc/fcfae92136cf429d84601042a8fd8235 [2024-06-14 12:08:05,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:08:05,436 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:08:05,439 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:08:05,439 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:08:05,442 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:08:05,443 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:08:04" (1/2) ... [2024-06-14 12:08:05,444 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68be1a01 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:08:05, skipping insertion in model container [2024-06-14 12:08:05,444 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:08:04" (1/2) ... [2024-06-14 12:08:05,445 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@48dbba52 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:08:05, skipping insertion in model container [2024-06-14 12:08:05,446 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:08:05" (2/2) ... [2024-06-14 12:08:05,446 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68be1a01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:08:05, skipping insertion in model container [2024-06-14 12:08:05,446 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:08:05" (2/2) ... [2024-06-14 12:08:05,446 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:08:05,539 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:08:05,540 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-14 12:08:05,540 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-14 12:08:05,540 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-14 12:08:05,541 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-14 12:08:05,541 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:08:05,541 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-14 12:08:05,574 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:08:05,882 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:08:05,891 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:08:06,025 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:08:06,092 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:08:06,093 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:08:06 WrapperNode [2024-06-14 12:08:06,093 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:08:06,095 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:08:06,095 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:08:06,095 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:08:06,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:08:06" (1/1) ... [2024-06-14 12:08:06,113 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:08:06" (1/1) ... [2024-06-14 12:08:06,147 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 157 [2024-06-14 12:08:06,147 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:08:06,148 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:08:06,148 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:08:06,148 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:08:06,160 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:08:06" (1/1) ... [2024-06-14 12:08:06,160 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:08:06" (1/1) ... [2024-06-14 12:08:06,163 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:08:06" (1/1) ... [2024-06-14 12:08:06,176 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 12:08:06,177 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:08:06" (1/1) ... [2024-06-14 12:08:06,177 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:08:06" (1/1) ... [2024-06-14 12:08:06,185 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:08:06" (1/1) ... [2024-06-14 12:08:06,187 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:08:06" (1/1) ... [2024-06-14 12:08:06,189 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:08:06" (1/1) ... [2024-06-14 12:08:06,190 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:08:06" (1/1) ... [2024-06-14 12:08:06,193 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:08:06,194 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:08:06,194 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:08:06,194 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:08:06,195 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:08:06" (1/1) ... [2024-06-14 12:08:06,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:08:06,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:08:06,229 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 12:08:06,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 12:08:06,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:08:06,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:08:06,259 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:08:06,259 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:08:06,259 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:08:06,259 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:08:06,259 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:08:06,259 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:08:06,259 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 12:08:06,260 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 12:08:06,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:08:06,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:08:06,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:08:06,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:08:06,261 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:08:06,402 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:08:06,404 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:08:06,763 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:08:06,763 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:08:06,946 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:08:06,946 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:08:06,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:08:06 BoogieIcfgContainer [2024-06-14 12:08:06,947 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:08:06,949 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:08:06,949 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:08:06,951 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:08:06,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:08:04" (1/4) ... [2024-06-14 12:08:06,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436aa9f7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:08:06, skipping insertion in model container [2024-06-14 12:08:06,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:08:05" (2/4) ... [2024-06-14 12:08:06,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436aa9f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:08:06, skipping insertion in model container [2024-06-14 12:08:06,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:08:06" (3/4) ... [2024-06-14 12:08:06,953 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436aa9f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:08:06, skipping insertion in model container [2024-06-14 12:08:06,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:08:06" (4/4) ... [2024-06-14 12:08:06,954 INFO L112 eAbstractionObserver]: Analyzing ICFG mix021_tso.oepc.i [2024-06-14 12:08:06,967 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:08:06,967 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 12:08:06,967 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:08:07,017 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:08:07,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 12:08:07,079 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-14 12:08:07,080 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:08:07,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:08:07,081 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 12:08:07,085 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-14 12:08:07,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:08:07,116 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;@544c08a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:08:07,121 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 12:08:07,125 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:08:07,125 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:08:07,125 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:08:07,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:07,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:08:07,126 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:07,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:07,130 INFO L85 PathProgramCache]: Analyzing trace with hash -840864292, now seen corresponding path program 1 times [2024-06-14 12:08:07,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:07,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701661760] [2024-06-14 12:08:07,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:07,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:08,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:08,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701661760] [2024-06-14 12:08:08,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701661760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:08,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:08,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:08:08,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45138093] [2024-06-14 12:08:08,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:08,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:08:08,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:08,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:08:08,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:08:08,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:08:08,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:08,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:08,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:08:08,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:09,890 INFO L124 PetriNetUnfolderBase]: 8188/11797 cut-off events. [2024-06-14 12:08:09,890 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2024-06-14 12:08:09,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23352 conditions, 11797 events. 8188/11797 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 67343 event pairs, 6210 based on Foata normal form. 1/11431 useless extension candidates. Maximal degree in co-relation 23336. Up to 11164 conditions per place. [2024-06-14 12:08:09,952 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 44 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-14 12:08:09,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 233 flow [2024-06-14 12:08:09,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:08:09,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:08:09,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-06-14 12:08:09,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5974842767295597 [2024-06-14 12:08:09,962 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 95 transitions. [2024-06-14 12:08:09,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 233 flow [2024-06-14 12:08:09,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:08:09,966 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-14 12:08:09,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-14 12:08:09,970 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-14 12:08:09,970 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-14 12:08:09,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:09,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:09,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:09,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:08:09,971 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:09,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:09,972 INFO L85 PathProgramCache]: Analyzing trace with hash -616711301, now seen corresponding path program 1 times [2024-06-14 12:08:09,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:09,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642987022] [2024-06-14 12:08:09,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:09,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:10,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:10,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642987022] [2024-06-14 12:08:10,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642987022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:10,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:10,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:08:10,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017019917] [2024-06-14 12:08:10,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:10,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:08:10,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:10,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:08:10,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:08:11,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:08:11,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:11,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:11,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:08:11,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:12,335 INFO L124 PetriNetUnfolderBase]: 9573/13388 cut-off events. [2024-06-14 12:08:12,336 INFO L125 PetriNetUnfolderBase]: For 2477/2477 co-relation queries the response was YES. [2024-06-14 12:08:12,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30228 conditions, 13388 events. 9573/13388 cut-off events. For 2477/2477 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 73683 event pairs, 6546 based on Foata normal form. 4/13388 useless extension candidates. Maximal degree in co-relation 30213. Up to 12974 conditions per place. [2024-06-14 12:08:12,404 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 55 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-14 12:08:12,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 327 flow [2024-06-14 12:08:12,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:08:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:08:12,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-14 12:08:12,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-06-14 12:08:12,407 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 120 transitions. [2024-06-14 12:08:12,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 327 flow [2024-06-14 12:08:12,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:08:12,409 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-14 12:08:12,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-14 12:08:12,410 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-14 12:08:12,410 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-14 12:08:12,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:12,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:12,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:12,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:08:12,411 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:12,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:12,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1938180409, now seen corresponding path program 1 times [2024-06-14 12:08:12,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:12,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807549530] [2024-06-14 12:08:12,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:12,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:13,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:13,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807549530] [2024-06-14 12:08:13,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807549530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:13,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:13,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:08:13,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461823909] [2024-06-14 12:08:13,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:13,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:08:13,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:13,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:08:13,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:08:13,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:08:13,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:13,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:13,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:08:13,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:14,548 INFO L124 PetriNetUnfolderBase]: 9591/13434 cut-off events. [2024-06-14 12:08:14,549 INFO L125 PetriNetUnfolderBase]: For 7218/7218 co-relation queries the response was YES. [2024-06-14 12:08:14,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33745 conditions, 13434 events. 9591/13434 cut-off events. For 7218/7218 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 73896 event pairs, 5218 based on Foata normal form. 7/13435 useless extension candidates. Maximal degree in co-relation 33728. Up to 12895 conditions per place. [2024-06-14 12:08:14,614 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 73 selfloop transitions, 21 changer transitions 0/101 dead transitions. [2024-06-14 12:08:14,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 543 flow [2024-06-14 12:08:14,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:08:14,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:08:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-14 12:08:14,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5924528301886792 [2024-06-14 12:08:14,619 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 5 states and 157 transitions. [2024-06-14 12:08:14,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 543 flow [2024-06-14 12:08:14,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 524 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 12:08:14,626 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 312 flow [2024-06-14 12:08:14,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-14 12:08:14,627 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-14 12:08:14,627 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 312 flow [2024-06-14 12:08:14,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:14,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:14,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:14,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:08:14,628 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)] === [2024-06-14 12:08:14,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:14,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1424458054, now seen corresponding path program 1 times [2024-06-14 12:08:14,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:14,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381278398] [2024-06-14 12:08:14,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:14,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:15,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:15,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381278398] [2024-06-14 12:08:15,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381278398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:15,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:15,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:08:15,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787350732] [2024-06-14 12:08:15,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:15,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:08:15,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:15,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:08:15,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:08:15,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:08:15,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:15,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:15,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:08:15,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:17,030 INFO L124 PetriNetUnfolderBase]: 9620/13476 cut-off events. [2024-06-14 12:08:17,031 INFO L125 PetriNetUnfolderBase]: For 17167/17173 co-relation queries the response was YES. [2024-06-14 12:08:17,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39370 conditions, 13476 events. 9620/13476 cut-off events. For 17167/17173 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 74409 event pairs, 4296 based on Foata normal form. 18/13488 useless extension candidates. Maximal degree in co-relation 39350. Up to 12860 conditions per place. [2024-06-14 12:08:17,115 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 80 selfloop transitions, 25 changer transitions 0/112 dead transitions. [2024-06-14 12:08:17,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 112 transitions, 688 flow [2024-06-14 12:08:17,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:08:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:08:17,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-14 12:08:17,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691823899371069 [2024-06-14 12:08:17,117 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 312 flow. Second operand 6 states and 181 transitions. [2024-06-14 12:08:17,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 112 transitions, 688 flow [2024-06-14 12:08:17,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 112 transitions, 676 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-14 12:08:17,125 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 389 flow [2024-06-14 12:08:17,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=389, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-14 12:08:17,127 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-06-14 12:08:17,127 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 389 flow [2024-06-14 12:08:17,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:17,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:17,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:17,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:08:17,128 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:17,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:17,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1224176198, now seen corresponding path program 1 times [2024-06-14 12:08:17,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:17,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169859425] [2024-06-14 12:08:17,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:17,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:18,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:18,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169859425] [2024-06-14 12:08:18,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169859425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:18,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:18,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:08:18,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112559765] [2024-06-14 12:08:18,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:18,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:08:18,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:18,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:08:18,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:08:18,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:08:18,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 389 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:18,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:18,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:08:18,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:19,526 INFO L124 PetriNetUnfolderBase]: 8216/11813 cut-off events. [2024-06-14 12:08:19,526 INFO L125 PetriNetUnfolderBase]: For 21841/21841 co-relation queries the response was YES. [2024-06-14 12:08:19,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37376 conditions, 11813 events. 8216/11813 cut-off events. For 21841/21841 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 67245 event pairs, 4302 based on Foata normal form. 3/11644 useless extension candidates. Maximal degree in co-relation 37353. Up to 11191 conditions per place. [2024-06-14 12:08:19,708 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 67 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-06-14 12:08:19,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 85 transitions, 587 flow [2024-06-14 12:08:19,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:08:19,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:08:19,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-14 12:08:19,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2024-06-14 12:08:19,711 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 389 flow. Second operand 5 states and 127 transitions. [2024-06-14 12:08:19,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 85 transitions, 587 flow [2024-06-14 12:08:19,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 85 transitions, 518 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:08:19,721 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 351 flow [2024-06-14 12:08:19,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2024-06-14 12:08:19,726 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-14 12:08:19,726 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 351 flow [2024-06-14 12:08:19,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:19,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:19,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:19,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:08:19,727 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:19,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:19,728 INFO L85 PathProgramCache]: Analyzing trace with hash -730179592, now seen corresponding path program 1 times [2024-06-14 12:08:19,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:19,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116828432] [2024-06-14 12:08:19,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:19,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:20,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:20,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116828432] [2024-06-14 12:08:20,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116828432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:20,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:20,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:08:20,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955096257] [2024-06-14 12:08:20,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:20,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:08:20,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:20,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:08:20,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:08:20,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:08:20,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 351 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:20,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:20,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:08:20,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:22,027 INFO L124 PetriNetUnfolderBase]: 8198/11877 cut-off events. [2024-06-14 12:08:22,028 INFO L125 PetriNetUnfolderBase]: For 25269/25269 co-relation queries the response was YES. [2024-06-14 12:08:22,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37926 conditions, 11877 events. 8198/11877 cut-off events. For 25269/25269 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 68267 event pairs, 4090 based on Foata normal form. 6/11701 useless extension candidates. Maximal degree in co-relation 37901. Up to 11137 conditions per place. [2024-06-14 12:08:22,125 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 75 selfloop transitions, 14 changer transitions 0/97 dead transitions. [2024-06-14 12:08:22,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 97 transitions, 621 flow [2024-06-14 12:08:22,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:08:22,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:08:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 12:08:22,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2024-06-14 12:08:22,127 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 351 flow. Second operand 6 states and 152 transitions. [2024-06-14 12:08:22,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 97 transitions, 621 flow [2024-06-14 12:08:22,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 97 transitions, 592 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 12:08:22,139 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 397 flow [2024-06-14 12:08:22,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=397, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-14 12:08:22,140 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-14 12:08:22,140 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 397 flow [2024-06-14 12:08:22,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:22,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:22,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:22,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:08:22,141 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:22,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:22,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1166450813, now seen corresponding path program 1 times [2024-06-14 12:08:22,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:22,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868327145] [2024-06-14 12:08:22,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:22,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:23,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:23,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868327145] [2024-06-14 12:08:23,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868327145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:23,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:23,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:08:23,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896100499] [2024-06-14 12:08:23,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:23,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:08:23,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:23,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:08:23,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:08:23,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:08:23,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 397 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:23,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:23,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:08:23,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:24,500 INFO L124 PetriNetUnfolderBase]: 9606/13496 cut-off events. [2024-06-14 12:08:24,500 INFO L125 PetriNetUnfolderBase]: For 40327/40339 co-relation queries the response was YES. [2024-06-14 12:08:24,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46782 conditions, 13496 events. 9606/13496 cut-off events. For 40327/40339 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 74529 event pairs, 4983 based on Foata normal form. 14/13504 useless extension candidates. Maximal degree in co-relation 46757. Up to 12914 conditions per place. [2024-06-14 12:08:24,603 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 74 selfloop transitions, 25 changer transitions 0/106 dead transitions. [2024-06-14 12:08:24,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 106 transitions, 738 flow [2024-06-14 12:08:24,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:08:24,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:08:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 12:08:24,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-14 12:08:24,605 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 397 flow. Second operand 6 states and 156 transitions. [2024-06-14 12:08:24,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 106 transitions, 738 flow [2024-06-14 12:08:24,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 106 transitions, 695 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:08:24,626 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 450 flow [2024-06-14 12:08:24,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=450, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-14 12:08:24,628 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 17 predicate places. [2024-06-14 12:08:24,628 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 450 flow [2024-06-14 12:08:24,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:24,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:24,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:24,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:08:24,629 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:24,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:24,629 INFO L85 PathProgramCache]: Analyzing trace with hash -387660443, now seen corresponding path program 2 times [2024-06-14 12:08:24,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:24,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235674032] [2024-06-14 12:08:24,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:24,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:25,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:25,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235674032] [2024-06-14 12:08:25,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235674032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:25,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:25,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:08:25,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037431915] [2024-06-14 12:08:25,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:25,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:08:25,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:25,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:08:25,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:08:25,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:08:25,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 450 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:25,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:25,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:08:25,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:26,996 INFO L124 PetriNetUnfolderBase]: 9582/13448 cut-off events. [2024-06-14 12:08:26,997 INFO L125 PetriNetUnfolderBase]: For 47033/47039 co-relation queries the response was YES. [2024-06-14 12:08:27,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47724 conditions, 13448 events. 9582/13448 cut-off events. For 47033/47039 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 74086 event pairs, 5003 based on Foata normal form. 4/13439 useless extension candidates. Maximal degree in co-relation 47698. Up to 12884 conditions per place. [2024-06-14 12:08:27,105 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 67 selfloop transitions, 26 changer transitions 0/100 dead transitions. [2024-06-14 12:08:27,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 100 transitions, 698 flow [2024-06-14 12:08:27,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:08:27,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:08:27,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 12:08:27,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748427672955975 [2024-06-14 12:08:27,107 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 450 flow. Second operand 6 states and 151 transitions. [2024-06-14 12:08:27,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 100 transitions, 698 flow [2024-06-14 12:08:27,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 100 transitions, 655 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:08:27,129 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 470 flow [2024-06-14 12:08:27,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=470, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2024-06-14 12:08:27,130 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-14 12:08:27,130 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 470 flow [2024-06-14 12:08:27,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:27,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:27,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:27,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:08:27,131 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:27,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:27,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1081292985, now seen corresponding path program 1 times [2024-06-14 12:08:27,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:27,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838148768] [2024-06-14 12:08:27,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:27,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:28,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:28,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838148768] [2024-06-14 12:08:28,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838148768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:28,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:28,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:28,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094448546] [2024-06-14 12:08:28,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:28,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:28,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:28,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:28,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:28,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:08:28,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 470 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 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) [2024-06-14 12:08:28,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:28,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:08:28,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:29,685 INFO L124 PetriNetUnfolderBase]: 9948/13920 cut-off events. [2024-06-14 12:08:29,686 INFO L125 PetriNetUnfolderBase]: For 57915/57924 co-relation queries the response was YES. [2024-06-14 12:08:29,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51086 conditions, 13920 events. 9948/13920 cut-off events. For 57915/57924 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 76220 event pairs, 4405 based on Foata normal form. 15/13927 useless extension candidates. Maximal degree in co-relation 51059. Up to 12950 conditions per place. [2024-06-14 12:08:29,809 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 104 selfloop transitions, 55 changer transitions 0/166 dead transitions. [2024-06-14 12:08:29,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 166 transitions, 1348 flow [2024-06-14 12:08:29,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:08:29,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:08:29,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-14 12:08:29,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-14 12:08:29,810 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 470 flow. Second operand 8 states and 216 transitions. [2024-06-14 12:08:29,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 166 transitions, 1348 flow [2024-06-14 12:08:29,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 166 transitions, 1185 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:08:29,845 INFO L231 Difference]: Finished difference. Result has 81 places, 109 transitions, 791 flow [2024-06-14 12:08:29,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=791, PETRI_PLACES=81, PETRI_TRANSITIONS=109} [2024-06-14 12:08:29,845 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-14 12:08:29,845 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 109 transitions, 791 flow [2024-06-14 12:08:29,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 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) [2024-06-14 12:08:29,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:29,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:29,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:08:29,846 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:29,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:29,847 INFO L85 PathProgramCache]: Analyzing trace with hash 85243309, now seen corresponding path program 2 times [2024-06-14 12:08:29,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:29,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100914378] [2024-06-14 12:08:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:29,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:30,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:30,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100914378] [2024-06-14 12:08:30,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100914378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:30,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:30,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:30,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026302189] [2024-06-14 12:08:30,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:30,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:30,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:30,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:30,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:30,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:08:30,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 109 transitions, 791 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 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) [2024-06-14 12:08:30,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:30,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:08:30,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:32,724 INFO L124 PetriNetUnfolderBase]: 10108/14152 cut-off events. [2024-06-14 12:08:32,724 INFO L125 PetriNetUnfolderBase]: For 76116/76128 co-relation queries the response was YES. [2024-06-14 12:08:32,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56918 conditions, 14152 events. 10108/14152 cut-off events. For 76116/76128 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 77579 event pairs, 4410 based on Foata normal form. 26/14170 useless extension candidates. Maximal degree in co-relation 56887. Up to 13062 conditions per place. [2024-06-14 12:08:32,839 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 90 selfloop transitions, 65 changer transitions 0/162 dead transitions. [2024-06-14 12:08:32,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 162 transitions, 1399 flow [2024-06-14 12:08:32,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:32,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:32,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-14 12:08:32,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49865229110512127 [2024-06-14 12:08:32,840 INFO L175 Difference]: Start difference. First operand has 81 places, 109 transitions, 791 flow. Second operand 7 states and 185 transitions. [2024-06-14 12:08:32,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 162 transitions, 1399 flow [2024-06-14 12:08:33,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 162 transitions, 1358 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-14 12:08:33,019 INFO L231 Difference]: Finished difference. Result has 86 places, 118 transitions, 1000 flow [2024-06-14 12:08:33,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1000, PETRI_PLACES=86, PETRI_TRANSITIONS=118} [2024-06-14 12:08:33,020 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-14 12:08:33,020 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 118 transitions, 1000 flow [2024-06-14 12:08:33,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 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) [2024-06-14 12:08:33,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:33,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:33,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:08:33,021 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:33,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:33,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1507570079, now seen corresponding path program 3 times [2024-06-14 12:08:33,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:33,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296616526] [2024-06-14 12:08:33,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:33,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:33,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:33,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296616526] [2024-06-14 12:08:33,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296616526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:33,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:33,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:33,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506635605] [2024-06-14 12:08:33,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:33,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:33,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:33,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:33,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:34,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:08:34,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 118 transitions, 1000 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 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) [2024-06-14 12:08:34,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:34,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:08:34,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:35,876 INFO L124 PetriNetUnfolderBase]: 10188/14246 cut-off events. [2024-06-14 12:08:35,876 INFO L125 PetriNetUnfolderBase]: For 89921/89935 co-relation queries the response was YES. [2024-06-14 12:08:35,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59996 conditions, 14246 events. 10188/14246 cut-off events. For 89921/89935 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 77718 event pairs, 4423 based on Foata normal form. 17/14233 useless extension candidates. Maximal degree in co-relation 59963. Up to 13104 conditions per place. [2024-06-14 12:08:35,967 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 89 selfloop transitions, 81 changer transitions 0/177 dead transitions. [2024-06-14 12:08:35,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 177 transitions, 1800 flow [2024-06-14 12:08:35,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-14 12:08:35,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013477088948787 [2024-06-14 12:08:35,969 INFO L175 Difference]: Start difference. First operand has 86 places, 118 transitions, 1000 flow. Second operand 7 states and 186 transitions. [2024-06-14 12:08:35,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 177 transitions, 1800 flow [2024-06-14 12:08:36,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 177 transitions, 1631 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 12:08:36,035 INFO L231 Difference]: Finished difference. Result has 89 places, 132 transitions, 1213 flow [2024-06-14 12:08:36,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1213, PETRI_PLACES=89, PETRI_TRANSITIONS=132} [2024-06-14 12:08:36,035 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 33 predicate places. [2024-06-14 12:08:36,035 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 132 transitions, 1213 flow [2024-06-14 12:08:36,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 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) [2024-06-14 12:08:36,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:36,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:36,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:08:36,036 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:36,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:36,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1623103431, now seen corresponding path program 4 times [2024-06-14 12:08:36,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:36,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635936730] [2024-06-14 12:08:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:36,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:36,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:36,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635936730] [2024-06-14 12:08:36,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635936730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:36,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:36,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:36,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217177321] [2024-06-14 12:08:36,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:36,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:36,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:36,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:36,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:37,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:08:37,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 132 transitions, 1213 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 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) [2024-06-14 12:08:37,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:37,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:08:37,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:38,781 INFO L124 PetriNetUnfolderBase]: 10156/14212 cut-off events. [2024-06-14 12:08:38,782 INFO L125 PetriNetUnfolderBase]: For 90622/90632 co-relation queries the response was YES. [2024-06-14 12:08:38,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59513 conditions, 14212 events. 10156/14212 cut-off events. For 90622/90632 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 77614 event pairs, 4442 based on Foata normal form. 13/14195 useless extension candidates. Maximal degree in co-relation 59479. Up to 13087 conditions per place. [2024-06-14 12:08:38,883 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 88 selfloop transitions, 79 changer transitions 0/174 dead transitions. [2024-06-14 12:08:38,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 174 transitions, 1747 flow [2024-06-14 12:08:38,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:38,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:38,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 12:08:38,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-14 12:08:38,885 INFO L175 Difference]: Start difference. First operand has 89 places, 132 transitions, 1213 flow. Second operand 7 states and 184 transitions. [2024-06-14 12:08:38,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 174 transitions, 1747 flow [2024-06-14 12:08:38,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 174 transitions, 1602 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-14 12:08:38,959 INFO L231 Difference]: Finished difference. Result has 93 places, 132 transitions, 1240 flow [2024-06-14 12:08:38,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1240, PETRI_PLACES=93, PETRI_TRANSITIONS=132} [2024-06-14 12:08:38,960 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 37 predicate places. [2024-06-14 12:08:38,960 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 132 transitions, 1240 flow [2024-06-14 12:08:38,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 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) [2024-06-14 12:08:38,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:38,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:38,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:08:38,961 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)] === [2024-06-14 12:08:38,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:38,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1622857353, now seen corresponding path program 1 times [2024-06-14 12:08:38,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:38,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666111483] [2024-06-14 12:08:38,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:38,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:40,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:40,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666111483] [2024-06-14 12:08:40,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666111483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:40,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:40,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:08:40,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587310600] [2024-06-14 12:08:40,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:40,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:08:40,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:40,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:08:40,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:08:40,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:08:40,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 132 transitions, 1240 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:40,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:40,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:08:40,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:42,288 INFO L124 PetriNetUnfolderBase]: 8746/12480 cut-off events. [2024-06-14 12:08:42,289 INFO L125 PetriNetUnfolderBase]: For 85692/85694 co-relation queries the response was YES. [2024-06-14 12:08:42,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52883 conditions, 12480 events. 8746/12480 cut-off events. For 85692/85694 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 70091 event pairs, 3825 based on Foata normal form. 6/12348 useless extension candidates. Maximal degree in co-relation 52847. Up to 11846 conditions per place. [2024-06-14 12:08:42,414 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 143 selfloop transitions, 17 changer transitions 0/168 dead transitions. [2024-06-14 12:08:42,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 168 transitions, 1698 flow [2024-06-14 12:08:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:42,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:42,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 12:08:42,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743935309973046 [2024-06-14 12:08:42,416 INFO L175 Difference]: Start difference. First operand has 93 places, 132 transitions, 1240 flow. Second operand 7 states and 176 transitions. [2024-06-14 12:08:42,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 168 transitions, 1698 flow [2024-06-14 12:08:42,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 168 transitions, 1505 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 12:08:42,502 INFO L231 Difference]: Finished difference. Result has 94 places, 135 transitions, 1133 flow [2024-06-14 12:08:42,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1047, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1133, PETRI_PLACES=94, PETRI_TRANSITIONS=135} [2024-06-14 12:08:42,503 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-14 12:08:42,504 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 135 transitions, 1133 flow [2024-06-14 12:08:42,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:42,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:42,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:42,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:08:42,504 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:42,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:42,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1376489854, now seen corresponding path program 1 times [2024-06-14 12:08:42,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:42,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194267433] [2024-06-14 12:08:42,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:42,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:43,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:43,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194267433] [2024-06-14 12:08:43,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194267433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:43,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:43,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:08:43,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930694483] [2024-06-14 12:08:43,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:43,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:08:43,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:43,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:08:43,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:08:43,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:08:43,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 135 transitions, 1133 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:43,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:43,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:08:43,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:44,806 INFO L124 PetriNetUnfolderBase]: 8739/13012 cut-off events. [2024-06-14 12:08:44,806 INFO L125 PetriNetUnfolderBase]: For 94621/94623 co-relation queries the response was YES. [2024-06-14 12:08:44,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54899 conditions, 13012 events. 8739/13012 cut-off events. For 94621/94623 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 77668 event pairs, 4000 based on Foata normal form. 2/12993 useless extension candidates. Maximal degree in co-relation 54862. Up to 11903 conditions per place. [2024-06-14 12:08:44,905 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 135 selfloop transitions, 10 changer transitions 0/153 dead transitions. [2024-06-14 12:08:44,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 153 transitions, 1505 flow [2024-06-14 12:08:44,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:08:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:08:44,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-14 12:08:44,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641509433962264 [2024-06-14 12:08:44,906 INFO L175 Difference]: Start difference. First operand has 94 places, 135 transitions, 1133 flow. Second operand 5 states and 123 transitions. [2024-06-14 12:08:44,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 153 transitions, 1505 flow [2024-06-14 12:08:44,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 153 transitions, 1445 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:08:44,989 INFO L231 Difference]: Finished difference. Result has 94 places, 139 transitions, 1148 flow [2024-06-14 12:08:44,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1148, PETRI_PLACES=94, PETRI_TRANSITIONS=139} [2024-06-14 12:08:44,990 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-14 12:08:44,990 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 139 transitions, 1148 flow [2024-06-14 12:08:44,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:44,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:44,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:44,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:08:44,991 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:44,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:44,992 INFO L85 PathProgramCache]: Analyzing trace with hash 27293065, now seen corresponding path program 1 times [2024-06-14 12:08:44,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:44,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171565776] [2024-06-14 12:08:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:44,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:45,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:45,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171565776] [2024-06-14 12:08:45,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171565776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:45,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:45,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:45,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655560262] [2024-06-14 12:08:45,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:45,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:45,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:45,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:45,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:46,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:08:46,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 139 transitions, 1148 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:46,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:46,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:08:46,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:47,910 INFO L124 PetriNetUnfolderBase]: 10334/14720 cut-off events. [2024-06-14 12:08:47,911 INFO L125 PetriNetUnfolderBase]: For 132764/132787 co-relation queries the response was YES. [2024-06-14 12:08:47,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66723 conditions, 14720 events. 10334/14720 cut-off events. For 132764/132787 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 82492 event pairs, 4385 based on Foata normal form. 28/14740 useless extension candidates. Maximal degree in co-relation 66685. Up to 13230 conditions per place. [2024-06-14 12:08:48,010 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 105 selfloop transitions, 90 changer transitions 0/202 dead transitions. [2024-06-14 12:08:48,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 202 transitions, 2062 flow [2024-06-14 12:08:48,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:48,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-14 12:08:48,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-14 12:08:48,012 INFO L175 Difference]: Start difference. First operand has 94 places, 139 transitions, 1148 flow. Second operand 7 states and 188 transitions. [2024-06-14 12:08:48,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 202 transitions, 2062 flow [2024-06-14 12:08:48,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 202 transitions, 2017 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 12:08:48,072 INFO L231 Difference]: Finished difference. Result has 98 places, 155 transitions, 1524 flow [2024-06-14 12:08:48,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1524, PETRI_PLACES=98, PETRI_TRANSITIONS=155} [2024-06-14 12:08:48,073 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 42 predicate places. [2024-06-14 12:08:48,073 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 155 transitions, 1524 flow [2024-06-14 12:08:48,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:48,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:48,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:48,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:08:48,074 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:48,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:48,074 INFO L85 PathProgramCache]: Analyzing trace with hash 27287485, now seen corresponding path program 2 times [2024-06-14 12:08:48,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:48,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365044215] [2024-06-14 12:08:48,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:48,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:48,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:49,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:49,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365044215] [2024-06-14 12:08:49,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365044215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:49,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:49,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:49,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469040979] [2024-06-14 12:08:49,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:49,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:49,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:49,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:49,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:49,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:08:49,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 155 transitions, 1524 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:49,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:49,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:08:49,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:51,007 INFO L124 PetriNetUnfolderBase]: 10298/14696 cut-off events. [2024-06-14 12:08:51,007 INFO L125 PetriNetUnfolderBase]: For 148145/148176 co-relation queries the response was YES. [2024-06-14 12:08:51,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68234 conditions, 14696 events. 10298/14696 cut-off events. For 148145/148176 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 82527 event pairs, 4407 based on Foata normal form. 38/14726 useless extension candidates. Maximal degree in co-relation 68195. Up to 13200 conditions per place. [2024-06-14 12:08:51,139 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 101 selfloop transitions, 94 changer transitions 0/202 dead transitions. [2024-06-14 12:08:51,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 202 transitions, 2150 flow [2024-06-14 12:08:51,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:51,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:51,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-14 12:08:51,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-14 12:08:51,142 INFO L175 Difference]: Start difference. First operand has 98 places, 155 transitions, 1524 flow. Second operand 7 states and 189 transitions. [2024-06-14 12:08:51,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 202 transitions, 2150 flow [2024-06-14 12:08:51,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 202 transitions, 1962 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-14 12:08:51,418 INFO L231 Difference]: Finished difference. Result has 102 places, 155 transitions, 1539 flow [2024-06-14 12:08:51,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1539, PETRI_PLACES=102, PETRI_TRANSITIONS=155} [2024-06-14 12:08:51,419 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-14 12:08:51,421 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 155 transitions, 1539 flow [2024-06-14 12:08:51,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:51,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:51,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:51,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:08:51,423 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:51,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:51,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1127880781, now seen corresponding path program 3 times [2024-06-14 12:08:51,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:51,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512235194] [2024-06-14 12:08:51,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:51,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:52,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:52,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512235194] [2024-06-14 12:08:52,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512235194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:52,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:52,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:52,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751016782] [2024-06-14 12:08:52,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:52,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:52,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:52,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:52,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:52,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:08:52,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 155 transitions, 1539 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:52,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:52,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:08:52,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:54,267 INFO L124 PetriNetUnfolderBase]: 10266/14634 cut-off events. [2024-06-14 12:08:54,267 INFO L125 PetriNetUnfolderBase]: For 162234/162288 co-relation queries the response was YES. [2024-06-14 12:08:54,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68763 conditions, 14634 events. 10266/14634 cut-off events. For 162234/162288 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 82154 event pairs, 4403 based on Foata normal form. 43/14646 useless extension candidates. Maximal degree in co-relation 68723. Up to 13173 conditions per place. [2024-06-14 12:08:54,384 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 99 selfloop transitions, 87 changer transitions 0/193 dead transitions. [2024-06-14 12:08:54,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 193 transitions, 2043 flow [2024-06-14 12:08:54,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:54,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 12:08:54,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-14 12:08:54,387 INFO L175 Difference]: Start difference. First operand has 102 places, 155 transitions, 1539 flow. Second operand 7 states and 177 transitions. [2024-06-14 12:08:54,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 193 transitions, 2043 flow [2024-06-14 12:08:54,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 193 transitions, 1718 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 12:08:54,511 INFO L231 Difference]: Finished difference. Result has 102 places, 155 transitions, 1403 flow [2024-06-14 12:08:54,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1403, PETRI_PLACES=102, PETRI_TRANSITIONS=155} [2024-06-14 12:08:54,511 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-14 12:08:54,512 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 155 transitions, 1403 flow [2024-06-14 12:08:54,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:54,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:54,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:54,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:08:54,512 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:54,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:54,513 INFO L85 PathProgramCache]: Analyzing trace with hash 239578980, now seen corresponding path program 1 times [2024-06-14 12:08:54,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:54,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002616910] [2024-06-14 12:08:54,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:54,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:55,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:55,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002616910] [2024-06-14 12:08:55,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002616910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:55,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:55,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:55,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448495397] [2024-06-14 12:08:55,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:55,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:55,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:55,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:55,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:55,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:08:55,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 155 transitions, 1403 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:55,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:55,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:08:55,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:57,301 INFO L124 PetriNetUnfolderBase]: 10302/14656 cut-off events. [2024-06-14 12:08:57,302 INFO L125 PetriNetUnfolderBase]: For 173894/173914 co-relation queries the response was YES. [2024-06-14 12:08:57,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69721 conditions, 14656 events. 10302/14656 cut-off events. For 173894/173914 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 82025 event pairs, 3806 based on Foata normal form. 22/14672 useless extension candidates. Maximal degree in co-relation 69681. Up to 13587 conditions per place. [2024-06-14 12:08:57,420 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 148 selfloop transitions, 46 changer transitions 0/201 dead transitions. [2024-06-14 12:08:57,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 201 transitions, 2091 flow [2024-06-14 12:08:57,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 12:08:57,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48247978436657685 [2024-06-14 12:08:57,422 INFO L175 Difference]: Start difference. First operand has 102 places, 155 transitions, 1403 flow. Second operand 7 states and 179 transitions. [2024-06-14 12:08:57,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 201 transitions, 2091 flow [2024-06-14 12:08:57,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 201 transitions, 1837 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 12:08:57,558 INFO L231 Difference]: Finished difference. Result has 102 places, 161 transitions, 1337 flow [2024-06-14 12:08:57,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1337, PETRI_PLACES=102, PETRI_TRANSITIONS=161} [2024-06-14 12:08:57,558 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-14 12:08:57,558 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 161 transitions, 1337 flow [2024-06-14 12:08:57,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:57,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:57,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:57,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:08:57,559 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:57,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:57,559 INFO L85 PathProgramCache]: Analyzing trace with hash 841440340, now seen corresponding path program 2 times [2024-06-14 12:08:57,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:57,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413108988] [2024-06-14 12:08:57,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:57,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:58,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:58,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413108988] [2024-06-14 12:08:58,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413108988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:58,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:58,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:58,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586404862] [2024-06-14 12:08:58,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:58,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:58,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:58,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:58,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:58,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:08:58,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 161 transitions, 1337 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:58,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:58,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:08:58,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:00,397 INFO L124 PetriNetUnfolderBase]: 10287/14634 cut-off events. [2024-06-14 12:09:00,398 INFO L125 PetriNetUnfolderBase]: For 193633/193645 co-relation queries the response was YES. [2024-06-14 12:09:00,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71401 conditions, 14634 events. 10287/14634 cut-off events. For 193633/193645 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 81742 event pairs, 4473 based on Foata normal form. 14/14642 useless extension candidates. Maximal degree in co-relation 71360. Up to 13702 conditions per place. [2024-06-14 12:09:00,521 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 147 selfloop transitions, 45 changer transitions 0/199 dead transitions. [2024-06-14 12:09:00,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 199 transitions, 1851 flow [2024-06-14 12:09:00,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:09:00,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:09:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 12:09:00,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743935309973046 [2024-06-14 12:09:00,526 INFO L175 Difference]: Start difference. First operand has 102 places, 161 transitions, 1337 flow. Second operand 7 states and 176 transitions. [2024-06-14 12:09:00,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 199 transitions, 1851 flow [2024-06-14 12:09:00,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 199 transitions, 1750 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-14 12:09:00,672 INFO L231 Difference]: Finished difference. Result has 106 places, 161 transitions, 1338 flow [2024-06-14 12:09:00,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1338, PETRI_PLACES=106, PETRI_TRANSITIONS=161} [2024-06-14 12:09:00,673 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-06-14 12:09:00,673 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 161 transitions, 1338 flow [2024-06-14 12:09:00,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:00,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:00,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:00,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:09:00,673 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:09:00,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:00,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1301906992, now seen corresponding path program 1 times [2024-06-14 12:09:00,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:00,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432419340] [2024-06-14 12:09:00,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:00,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:02,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:02,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432419340] [2024-06-14 12:09:02,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432419340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:02,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:02,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:09:02,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163969781] [2024-06-14 12:09:02,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:02,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:09:02,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:02,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:09:02,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:09:02,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:09:02,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 161 transitions, 1338 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:02,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:02,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:09:02,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:04,242 INFO L124 PetriNetUnfolderBase]: 10487/14872 cut-off events. [2024-06-14 12:09:04,243 INFO L125 PetriNetUnfolderBase]: For 220724/220739 co-relation queries the response was YES. [2024-06-14 12:09:04,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73969 conditions, 14872 events. 10487/14872 cut-off events. For 220724/220739 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 82929 event pairs, 4088 based on Foata normal form. 44/14904 useless extension candidates. Maximal degree in co-relation 73926. Up to 13216 conditions per place. [2024-06-14 12:09:04,391 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 113 selfloop transitions, 96 changer transitions 0/216 dead transitions. [2024-06-14 12:09:04,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 216 transitions, 1976 flow [2024-06-14 12:09:04,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:04,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-14 12:09:04,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49292452830188677 [2024-06-14 12:09:04,393 INFO L175 Difference]: Start difference. First operand has 106 places, 161 transitions, 1338 flow. Second operand 8 states and 209 transitions. [2024-06-14 12:09:04,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 216 transitions, 1976 flow [2024-06-14 12:09:04,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 216 transitions, 1874 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:09:04,558 INFO L231 Difference]: Finished difference. Result has 108 places, 164 transitions, 1495 flow [2024-06-14 12:09:04,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1495, PETRI_PLACES=108, PETRI_TRANSITIONS=164} [2024-06-14 12:09:04,558 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-14 12:09:04,558 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 164 transitions, 1495 flow [2024-06-14 12:09:04,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:04,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:04,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:04,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:09:04,559 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)] === [2024-06-14 12:09:04,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:04,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1273617931, now seen corresponding path program 1 times [2024-06-14 12:09:04,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:04,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229054819] [2024-06-14 12:09:04,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:04,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:05,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:05,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229054819] [2024-06-14 12:09:05,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229054819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:05,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:05,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:09:05,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815079032] [2024-06-14 12:09:05,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:05,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:09:05,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:05,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:09:05,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:09:05,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:09:05,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 164 transitions, 1495 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:05,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:05,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:09:05,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:07,371 INFO L124 PetriNetUnfolderBase]: 10521/14938 cut-off events. [2024-06-14 12:09:07,372 INFO L125 PetriNetUnfolderBase]: For 241550/241554 co-relation queries the response was YES. [2024-06-14 12:09:07,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77467 conditions, 14938 events. 10521/14938 cut-off events. For 241550/241554 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 83336 event pairs, 4467 based on Foata normal form. 6/14937 useless extension candidates. Maximal degree in co-relation 77423. Up to 14261 conditions per place. [2024-06-14 12:09:07,495 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 167 selfloop transitions, 24 changer transitions 0/198 dead transitions. [2024-06-14 12:09:07,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 198 transitions, 2068 flow [2024-06-14 12:09:07,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:09:07,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:09:07,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-14 12:09:07,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42587601078167114 [2024-06-14 12:09:07,497 INFO L175 Difference]: Start difference. First operand has 108 places, 164 transitions, 1495 flow. Second operand 7 states and 158 transitions. [2024-06-14 12:09:07,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 198 transitions, 2068 flow [2024-06-14 12:09:07,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 198 transitions, 1849 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 12:09:07,686 INFO L231 Difference]: Finished difference. Result has 111 places, 176 transitions, 1479 flow [2024-06-14 12:09:07,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1284, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1479, PETRI_PLACES=111, PETRI_TRANSITIONS=176} [2024-06-14 12:09:07,686 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-14 12:09:07,686 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 176 transitions, 1479 flow [2024-06-14 12:09:07,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:07,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:07,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:07,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:09:07,687 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:09:07,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:07,687 INFO L85 PathProgramCache]: Analyzing trace with hash -2097076466, now seen corresponding path program 2 times [2024-06-14 12:09:07,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:07,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998894658] [2024-06-14 12:09:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:07,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:09,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:09,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:09,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998894658] [2024-06-14 12:09:09,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998894658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:09,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:09,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:09:09,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350920472] [2024-06-14 12:09:09,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:09,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:09:09,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:09,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:09:09,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:09:09,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:09:09,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 176 transitions, 1479 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:09,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:09,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:09:09,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:11,229 INFO L124 PetriNetUnfolderBase]: 10557/14959 cut-off events. [2024-06-14 12:09:11,230 INFO L125 PetriNetUnfolderBase]: For 264546/264548 co-relation queries the response was YES. [2024-06-14 12:09:11,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79797 conditions, 14959 events. 10557/14959 cut-off events. For 264546/264548 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 83173 event pairs, 4115 based on Foata normal form. 8/14921 useless extension candidates. Maximal degree in co-relation 79750. Up to 13544 conditions per place. [2024-06-14 12:09:11,377 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 117 selfloop transitions, 101 changer transitions 0/225 dead transitions. [2024-06-14 12:09:11,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 225 transitions, 2125 flow [2024-06-14 12:09:11,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:11,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 12:09:11,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-14 12:09:11,379 INFO L175 Difference]: Start difference. First operand has 111 places, 176 transitions, 1479 flow. Second operand 8 states and 204 transitions. [2024-06-14 12:09:11,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 225 transitions, 2125 flow [2024-06-14 12:09:11,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 225 transitions, 2065 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-14 12:09:11,604 INFO L231 Difference]: Finished difference. Result has 117 places, 179 transitions, 1694 flow [2024-06-14 12:09:11,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1419, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1694, PETRI_PLACES=117, PETRI_TRANSITIONS=179} [2024-06-14 12:09:11,604 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 61 predicate places. [2024-06-14 12:09:11,605 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 179 transitions, 1694 flow [2024-06-14 12:09:11,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:11,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:11,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:11,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:09:11,605 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)] === [2024-06-14 12:09:11,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:11,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1474032876, now seen corresponding path program 3 times [2024-06-14 12:09:11,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:11,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680135997] [2024-06-14 12:09:11,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:11,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:12,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:12,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:12,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680135997] [2024-06-14 12:09:12,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680135997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:12,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:12,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:09:12,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963112498] [2024-06-14 12:09:12,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:12,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:09:12,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:12,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:09:12,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:09:13,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:09:13,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 179 transitions, 1694 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:13,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:13,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:09:13,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:15,062 INFO L124 PetriNetUnfolderBase]: 10593/15003 cut-off events. [2024-06-14 12:09:15,063 INFO L125 PetriNetUnfolderBase]: For 296819/296825 co-relation queries the response was YES. [2024-06-14 12:09:15,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83538 conditions, 15003 events. 10593/15003 cut-off events. For 296819/296825 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 83377 event pairs, 4099 based on Foata normal form. 12/14969 useless extension candidates. Maximal degree in co-relation 83489. Up to 13596 conditions per place. [2024-06-14 12:09:15,204 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 118 selfloop transitions, 103 changer transitions 0/228 dead transitions. [2024-06-14 12:09:15,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 228 transitions, 2354 flow [2024-06-14 12:09:15,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:15,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:15,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 12:09:15,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47877358490566035 [2024-06-14 12:09:15,206 INFO L175 Difference]: Start difference. First operand has 117 places, 179 transitions, 1694 flow. Second operand 8 states and 203 transitions. [2024-06-14 12:09:15,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 228 transitions, 2354 flow [2024-06-14 12:09:15,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 228 transitions, 2107 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 12:09:15,431 INFO L231 Difference]: Finished difference. Result has 119 places, 182 transitions, 1732 flow [2024-06-14 12:09:15,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1447, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1732, PETRI_PLACES=119, PETRI_TRANSITIONS=182} [2024-06-14 12:09:15,432 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-14 12:09:15,433 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 182 transitions, 1732 flow [2024-06-14 12:09:15,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:15,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:15,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:15,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:09:15,433 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:09:15,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:15,448 INFO L85 PathProgramCache]: Analyzing trace with hash -492735402, now seen corresponding path program 4 times [2024-06-14 12:09:15,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:15,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605346108] [2024-06-14 12:09:15,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:15,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:16,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:16,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605346108] [2024-06-14 12:09:16,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605346108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:16,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:16,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:09:16,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138906448] [2024-06-14 12:09:16,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:16,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:09:16,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:16,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:09:16,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:09:16,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:09:16,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 182 transitions, 1732 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:16,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:16,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:09:16,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:19,037 INFO L124 PetriNetUnfolderBase]: 10578/14982 cut-off events. [2024-06-14 12:09:19,037 INFO L125 PetriNetUnfolderBase]: For 325525/325531 co-relation queries the response was YES. [2024-06-14 12:09:19,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85722 conditions, 14982 events. 10578/14982 cut-off events. For 325525/325531 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 83240 event pairs, 3793 based on Foata normal form. 12/14948 useless extension candidates. Maximal degree in co-relation 85672. Up to 13187 conditions per place. [2024-06-14 12:09:19,178 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 113 selfloop transitions, 114 changer transitions 0/234 dead transitions. [2024-06-14 12:09:19,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 234 transitions, 2418 flow [2024-06-14 12:09:19,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:19,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 12:09:19,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-14 12:09:19,180 INFO L175 Difference]: Start difference. First operand has 119 places, 182 transitions, 1732 flow. Second operand 8 states and 207 transitions. [2024-06-14 12:09:19,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 234 transitions, 2418 flow [2024-06-14 12:09:19,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 234 transitions, 2161 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 12:09:19,417 INFO L231 Difference]: Finished difference. Result has 121 places, 185 transitions, 1787 flow [2024-06-14 12:09:19,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1475, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1787, PETRI_PLACES=121, PETRI_TRANSITIONS=185} [2024-06-14 12:09:19,418 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 65 predicate places. [2024-06-14 12:09:19,418 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 185 transitions, 1787 flow [2024-06-14 12:09:19,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:19,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:19,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:19,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:09:19,419 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:09:19,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:19,419 INFO L85 PathProgramCache]: Analyzing trace with hash -43142371, now seen corresponding path program 2 times [2024-06-14 12:09:19,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:19,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751942481] [2024-06-14 12:09:19,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:19,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:20,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:20,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751942481] [2024-06-14 12:09:20,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751942481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:20,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:20,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:09:20,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973615612] [2024-06-14 12:09:20,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:20,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:09:20,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:20,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:09:20,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:09:20,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:09:20,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 185 transitions, 1787 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:20,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:20,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:09:20,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:22,116 INFO L124 PetriNetUnfolderBase]: 10594/15062 cut-off events. [2024-06-14 12:09:22,117 INFO L125 PetriNetUnfolderBase]: For 356340/356352 co-relation queries the response was YES. [2024-06-14 12:09:22,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88452 conditions, 15062 events. 10594/15062 cut-off events. For 356340/356352 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 84169 event pairs, 4457 based on Foata normal form. 10/15060 useless extension candidates. Maximal degree in co-relation 88401. Up to 14336 conditions per place. [2024-06-14 12:09:22,265 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 174 selfloop transitions, 33 changer transitions 0/214 dead transitions. [2024-06-14 12:09:22,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 214 transitions, 2497 flow [2024-06-14 12:09:22,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:09:22,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:09:22,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 12:09:22,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449685534591195 [2024-06-14 12:09:22,267 INFO L175 Difference]: Start difference. First operand has 121 places, 185 transitions, 1787 flow. Second operand 6 states and 143 transitions. [2024-06-14 12:09:22,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 214 transitions, 2497 flow [2024-06-14 12:09:22,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 214 transitions, 2211 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 12:09:22,527 INFO L231 Difference]: Finished difference. Result has 121 places, 193 transitions, 1720 flow [2024-06-14 12:09:22,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1720, PETRI_PLACES=121, PETRI_TRANSITIONS=193} [2024-06-14 12:09:22,528 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 65 predicate places. [2024-06-14 12:09:22,528 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 193 transitions, 1720 flow [2024-06-14 12:09:22,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:22,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:22,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:22,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:09:22,529 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:09:22,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:22,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1556354345, now seen corresponding path program 3 times [2024-06-14 12:09:22,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:22,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908533050] [2024-06-14 12:09:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:22,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:23,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:23,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908533050] [2024-06-14 12:09:23,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908533050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:23,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:23,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:09:23,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252305902] [2024-06-14 12:09:23,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:23,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:09:23,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:23,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:09:23,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:09:23,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:09:23,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 193 transitions, 1720 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:23,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:23,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:09:23,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:25,325 INFO L124 PetriNetUnfolderBase]: 10603/15074 cut-off events. [2024-06-14 12:09:25,326 INFO L125 PetriNetUnfolderBase]: For 386913/386913 co-relation queries the response was YES. [2024-06-14 12:09:25,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90336 conditions, 15074 events. 10603/15074 cut-off events. For 386913/386913 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 84288 event pairs, 4480 based on Foata normal form. 2/15072 useless extension candidates. Maximal degree in co-relation 90284. Up to 14373 conditions per place. [2024-06-14 12:09:25,473 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 190 selfloop transitions, 31 changer transitions 0/228 dead transitions. [2024-06-14 12:09:25,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 228 transitions, 2293 flow [2024-06-14 12:09:25,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:09:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:09:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 12:09:25,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4555256064690027 [2024-06-14 12:09:25,475 INFO L175 Difference]: Start difference. First operand has 121 places, 193 transitions, 1720 flow. Second operand 7 states and 169 transitions. [2024-06-14 12:09:25,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 228 transitions, 2293 flow [2024-06-14 12:09:25,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 228 transitions, 2168 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-14 12:09:25,782 INFO L231 Difference]: Finished difference. Result has 127 places, 200 transitions, 1738 flow [2024-06-14 12:09:25,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1596, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1738, PETRI_PLACES=127, PETRI_TRANSITIONS=200} [2024-06-14 12:09:25,783 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-14 12:09:25,783 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 200 transitions, 1738 flow [2024-06-14 12:09:25,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:25,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:25,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:25,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:09:25,783 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)] === [2024-06-14 12:09:25,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:25,784 INFO L85 PathProgramCache]: Analyzing trace with hash -31704973, now seen corresponding path program 1 times [2024-06-14 12:09:25,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:25,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477895062] [2024-06-14 12:09:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:25,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:25,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:26,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:26,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477895062] [2024-06-14 12:09:26,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477895062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:26,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:26,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:09:26,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868686384] [2024-06-14 12:09:26,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:26,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:09:26,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:26,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:09:26,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:09:26,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:09:26,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 200 transitions, 1738 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-14 12:09:26,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:26,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:09:26,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:28,506 INFO L124 PetriNetUnfolderBase]: 9224/13559 cut-off events. [2024-06-14 12:09:28,506 INFO L125 PetriNetUnfolderBase]: For 346993/346993 co-relation queries the response was YES. [2024-06-14 12:09:28,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80717 conditions, 13559 events. 9224/13559 cut-off events. For 346993/346993 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 79533 event pairs, 3772 based on Foata normal form. 2/13514 useless extension candidates. Maximal degree in co-relation 80662. Up to 12577 conditions per place. [2024-06-14 12:09:28,641 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 200 selfloop transitions, 16 changer transitions 0/224 dead transitions. [2024-06-14 12:09:28,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 224 transitions, 2292 flow [2024-06-14 12:09:28,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:09:28,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:09:28,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 12:09:28,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339622641509434 [2024-06-14 12:09:28,643 INFO L175 Difference]: Start difference. First operand has 127 places, 200 transitions, 1738 flow. Second operand 7 states and 161 transitions. [2024-06-14 12:09:28,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 224 transitions, 2292 flow [2024-06-14 12:09:28,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 224 transitions, 2218 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 12:09:28,970 INFO L231 Difference]: Finished difference. Result has 129 places, 204 transitions, 1773 flow [2024-06-14 12:09:28,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1773, PETRI_PLACES=129, PETRI_TRANSITIONS=204} [2024-06-14 12:09:28,971 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-06-14 12:09:28,971 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 204 transitions, 1773 flow [2024-06-14 12:09:28,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-14 12:09:28,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:28,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:28,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:09:28,971 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:09:28,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:28,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1267748329, now seen corresponding path program 2 times [2024-06-14 12:09:28,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:28,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072834072] [2024-06-14 12:09:28,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:28,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:29,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:29,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072834072] [2024-06-14 12:09:29,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072834072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:29,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:29,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:09:29,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71866917] [2024-06-14 12:09:29,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:29,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:09:29,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:29,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:09:29,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:09:29,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:09:29,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 204 transitions, 1773 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-14 12:09:29,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:29,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:09:29,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:31,698 INFO L124 PetriNetUnfolderBase]: 9217/13588 cut-off events. [2024-06-14 12:09:31,698 INFO L125 PetriNetUnfolderBase]: For 370766/370772 co-relation queries the response was YES. [2024-06-14 12:09:31,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83324 conditions, 13588 events. 9217/13588 cut-off events. For 370766/370772 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 80108 event pairs, 3773 based on Foata normal form. 6/13549 useless extension candidates. Maximal degree in co-relation 83268. Up to 12550 conditions per place. [2024-06-14 12:09:31,821 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 195 selfloop transitions, 22 changer transitions 0/225 dead transitions. [2024-06-14 12:09:31,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 225 transitions, 2327 flow [2024-06-14 12:09:31,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:09:31,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:09:31,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 12:09:31,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591194968553459 [2024-06-14 12:09:31,822 INFO L175 Difference]: Start difference. First operand has 129 places, 204 transitions, 1773 flow. Second operand 6 states and 146 transitions. [2024-06-14 12:09:31,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 225 transitions, 2327 flow [2024-06-14 12:09:32,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 225 transitions, 2236 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 12:09:32,065 INFO L231 Difference]: Finished difference. Result has 130 places, 208 transitions, 1811 flow [2024-06-14 12:09:32,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1811, PETRI_PLACES=130, PETRI_TRANSITIONS=208} [2024-06-14 12:09:32,066 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-06-14 12:09:32,066 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 208 transitions, 1811 flow [2024-06-14 12:09:32,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-14 12:09:32,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:32,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:32,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:09:32,067 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:09:32,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:32,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1262176203, now seen corresponding path program 1 times [2024-06-14 12:09:32,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:32,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995328621] [2024-06-14 12:09:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:32,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:33,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:33,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995328621] [2024-06-14 12:09:33,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995328621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:33,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:33,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:09:33,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093543046] [2024-06-14 12:09:33,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:33,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:09:33,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:33,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:09:33,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:09:33,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:09:33,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 208 transitions, 1811 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-14 12:09:33,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:33,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:09:33,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:35,171 INFO L124 PetriNetUnfolderBase]: 10964/15890 cut-off events. [2024-06-14 12:09:35,171 INFO L125 PetriNetUnfolderBase]: For 476184/476184 co-relation queries the response was YES. [2024-06-14 12:09:35,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100062 conditions, 15890 events. 10964/15890 cut-off events. For 476184/476184 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 92078 event pairs, 4601 based on Foata normal form. 2/15847 useless extension candidates. Maximal degree in co-relation 100006. Up to 14894 conditions per place. [2024-06-14 12:09:35,306 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 211 selfloop transitions, 19 changer transitions 0/237 dead transitions. [2024-06-14 12:09:35,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 237 transitions, 2430 flow [2024-06-14 12:09:35,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:09:35,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:09:35,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 12:09:35,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:09:35,307 INFO L175 Difference]: Start difference. First operand has 130 places, 208 transitions, 1811 flow. Second operand 7 states and 159 transitions. [2024-06-14 12:09:35,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 237 transitions, 2430 flow [2024-06-14 12:09:35,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 237 transitions, 2326 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 12:09:35,664 INFO L231 Difference]: Finished difference. Result has 134 places, 216 transitions, 1864 flow [2024-06-14 12:09:35,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1712, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1864, PETRI_PLACES=134, PETRI_TRANSITIONS=216} [2024-06-14 12:09:35,665 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 78 predicate places. [2024-06-14 12:09:35,665 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 216 transitions, 1864 flow [2024-06-14 12:09:35,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-14 12:09:35,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:35,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:35,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:09:35,666 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:09:35,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:35,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1963904696, now seen corresponding path program 1 times [2024-06-14 12:09:35,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:35,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595414655] [2024-06-14 12:09:35,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:35,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:36,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:36,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595414655] [2024-06-14 12:09:36,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595414655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:36,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:36,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:36,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680620996] [2024-06-14 12:09:36,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:36,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:36,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:36,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:36,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:36,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:09:36,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 216 transitions, 1864 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:36,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:36,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:09:36,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:39,264 INFO L124 PetriNetUnfolderBase]: 12102/17054 cut-off events. [2024-06-14 12:09:39,264 INFO L125 PetriNetUnfolderBase]: For 596559/596568 co-relation queries the response was YES. [2024-06-14 12:09:39,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114981 conditions, 17054 events. 12102/17054 cut-off events. For 596559/596568 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 95943 event pairs, 3555 based on Foata normal form. 28/17046 useless extension candidates. Maximal degree in co-relation 114923. Up to 14526 conditions per place. [2024-06-14 12:09:39,435 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 162 selfloop transitions, 104 changer transitions 0/274 dead transitions. [2024-06-14 12:09:39,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 274 transitions, 2842 flow [2024-06-14 12:09:39,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:39,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-14 12:09:39,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023584905660378 [2024-06-14 12:09:39,436 INFO L175 Difference]: Start difference. First operand has 134 places, 216 transitions, 1864 flow. Second operand 8 states and 213 transitions. [2024-06-14 12:09:39,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 274 transitions, 2842 flow [2024-06-14 12:09:39,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 274 transitions, 2749 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 12:09:39,834 INFO L231 Difference]: Finished difference. Result has 138 places, 220 transitions, 2120 flow [2024-06-14 12:09:39,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2120, PETRI_PLACES=138, PETRI_TRANSITIONS=220} [2024-06-14 12:09:39,835 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 82 predicate places. [2024-06-14 12:09:39,835 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 220 transitions, 2120 flow [2024-06-14 12:09:39,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:39,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:39,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:39,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:09:39,835 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:09:39,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:39,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1087626014, now seen corresponding path program 2 times [2024-06-14 12:09:39,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:39,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679822829] [2024-06-14 12:09:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:39,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:40,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:40,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679822829] [2024-06-14 12:09:40,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679822829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:40,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:40,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:40,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412350021] [2024-06-14 12:09:40,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:40,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:40,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:40,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:40,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:41,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:09:41,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 220 transitions, 2120 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:41,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:41,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:09:41,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:43,779 INFO L124 PetriNetUnfolderBase]: 12230/17250 cut-off events. [2024-06-14 12:09:43,779 INFO L125 PetriNetUnfolderBase]: For 643064/643073 co-relation queries the response was YES. [2024-06-14 12:09:43,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119247 conditions, 17250 events. 12230/17250 cut-off events. For 643064/643073 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 97337 event pairs, 4590 based on Foata normal form. 28/17256 useless extension candidates. Maximal degree in co-relation 119188. Up to 15378 conditions per place. [2024-06-14 12:09:44,016 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 164 selfloop transitions, 103 changer transitions 0/275 dead transitions. [2024-06-14 12:09:44,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 275 transitions, 2896 flow [2024-06-14 12:09:44,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:44,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 12:09:44,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:09:44,018 INFO L175 Difference]: Start difference. First operand has 138 places, 220 transitions, 2120 flow. Second operand 8 states and 212 transitions. [2024-06-14 12:09:44,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 275 transitions, 2896 flow [2024-06-14 12:09:44,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 275 transitions, 2745 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 12:09:44,525 INFO L231 Difference]: Finished difference. Result has 142 places, 222 transitions, 2256 flow [2024-06-14 12:09:44,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1971, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2256, PETRI_PLACES=142, PETRI_TRANSITIONS=222} [2024-06-14 12:09:44,525 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 86 predicate places. [2024-06-14 12:09:44,526 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 222 transitions, 2256 flow [2024-06-14 12:09:44,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:44,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:44,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:44,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:09:44,527 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:09:44,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:44,527 INFO L85 PathProgramCache]: Analyzing trace with hash 453376798, now seen corresponding path program 3 times [2024-06-14 12:09:44,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:44,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149376595] [2024-06-14 12:09:44,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:44,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:45,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:45,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149376595] [2024-06-14 12:09:45,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149376595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:45,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:45,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:45,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447093879] [2024-06-14 12:09:45,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:45,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:45,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:45,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:45,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:46,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:09:46,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 222 transitions, 2256 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:46,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:46,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:09:46,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:49,190 INFO L124 PetriNetUnfolderBase]: 12489/17674 cut-off events. [2024-06-14 12:09:49,190 INFO L125 PetriNetUnfolderBase]: For 696995/697004 co-relation queries the response was YES. [2024-06-14 12:09:49,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124081 conditions, 17674 events. 12489/17674 cut-off events. For 696995/697004 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 100352 event pairs, 4009 based on Foata normal form. 28/17694 useless extension candidates. Maximal degree in co-relation 124020. Up to 15625 conditions per place. [2024-06-14 12:09:49,393 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 169 selfloop transitions, 107 changer transitions 0/284 dead transitions. [2024-06-14 12:09:49,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 284 transitions, 3300 flow [2024-06-14 12:09:49,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:49,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-14 12:09:49,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141509433962265 [2024-06-14 12:09:49,411 INFO L175 Difference]: Start difference. First operand has 142 places, 222 transitions, 2256 flow. Second operand 8 states and 218 transitions. [2024-06-14 12:09:49,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 284 transitions, 3300 flow [2024-06-14 12:09:50,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 284 transitions, 3047 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 12:09:50,054 INFO L231 Difference]: Finished difference. Result has 144 places, 226 transitions, 2370 flow [2024-06-14 12:09:50,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2370, PETRI_PLACES=144, PETRI_TRANSITIONS=226} [2024-06-14 12:09:50,054 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 88 predicate places. [2024-06-14 12:09:50,054 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 226 transitions, 2370 flow [2024-06-14 12:09:50,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:50,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:50,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:50,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:09:50,055 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:09:50,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:50,056 INFO L85 PathProgramCache]: Analyzing trace with hash 453524668, now seen corresponding path program 4 times [2024-06-14 12:09:50,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:50,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862514982] [2024-06-14 12:09:50,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:50,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:51,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:51,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862514982] [2024-06-14 12:09:51,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862514982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:51,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:51,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:51,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894737253] [2024-06-14 12:09:51,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:51,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:51,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:51,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:51,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:51,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:09:51,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 226 transitions, 2370 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:51,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:51,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:09:51,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:54,132 INFO L124 PetriNetUnfolderBase]: 12653/17916 cut-off events. [2024-06-14 12:09:54,132 INFO L125 PetriNetUnfolderBase]: For 739911/739922 co-relation queries the response was YES. [2024-06-14 12:09:54,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126608 conditions, 17916 events. 12653/17916 cut-off events. For 739911/739922 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 102176 event pairs, 4703 based on Foata normal form. 36/17944 useless extension candidates. Maximal degree in co-relation 126546. Up to 16269 conditions per place. [2024-06-14 12:09:54,309 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 172 selfloop transitions, 102 changer transitions 0/282 dead transitions. [2024-06-14 12:09:54,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 282 transitions, 3178 flow [2024-06-14 12:09:54,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:54,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:54,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 12:09:54,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:09:54,311 INFO L175 Difference]: Start difference. First operand has 144 places, 226 transitions, 2370 flow. Second operand 8 states and 212 transitions. [2024-06-14 12:09:54,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 282 transitions, 3178 flow [2024-06-14 12:09:54,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 282 transitions, 3007 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 12:09:54,816 INFO L231 Difference]: Finished difference. Result has 148 places, 228 transitions, 2493 flow [2024-06-14 12:09:54,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2199, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2493, PETRI_PLACES=148, PETRI_TRANSITIONS=228} [2024-06-14 12:09:54,817 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 92 predicate places. [2024-06-14 12:09:54,817 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 228 transitions, 2493 flow [2024-06-14 12:09:54,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:54,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:54,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:54,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:09:54,818 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:09:54,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:54,818 INFO L85 PathProgramCache]: Analyzing trace with hash -381683106, now seen corresponding path program 5 times [2024-06-14 12:09:54,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:54,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427393047] [2024-06-14 12:09:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:54,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:56,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:56,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427393047] [2024-06-14 12:09:56,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427393047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:56,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:56,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:56,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764425340] [2024-06-14 12:09:56,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:56,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:56,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:56,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:56,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:56,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:09:56,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 228 transitions, 2493 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:56,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:56,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:09:56,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:59,262 INFO L124 PetriNetUnfolderBase]: 12817/18159 cut-off events. [2024-06-14 12:09:59,262 INFO L125 PetriNetUnfolderBase]: For 781458/781479 co-relation queries the response was YES. [2024-06-14 12:09:59,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129848 conditions, 18159 events. 12817/18159 cut-off events. For 781458/781479 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 103857 event pairs, 4687 based on Foata normal form. 46/18197 useless extension candidates. Maximal degree in co-relation 129784. Up to 16513 conditions per place. [2024-06-14 12:09:59,443 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 179 selfloop transitions, 95 changer transitions 0/282 dead transitions. [2024-06-14 12:09:59,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 282 transitions, 3299 flow [2024-06-14 12:09:59,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:59,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 12:09:59,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-14 12:09:59,445 INFO L175 Difference]: Start difference. First operand has 148 places, 228 transitions, 2493 flow. Second operand 8 states and 208 transitions. [2024-06-14 12:09:59,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 282 transitions, 3299 flow [2024-06-14 12:10:00,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 282 transitions, 3051 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:00,017 INFO L231 Difference]: Finished difference. Result has 150 places, 230 transitions, 2529 flow [2024-06-14 12:10:00,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2245, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2529, PETRI_PLACES=150, PETRI_TRANSITIONS=230} [2024-06-14 12:10:00,017 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 94 predicate places. [2024-06-14 12:10:00,017 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 230 transitions, 2529 flow [2024-06-14 12:10:00,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:00,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:00,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:00,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:10:00,018 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:10:00,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:00,018 INFO L85 PathProgramCache]: Analyzing trace with hash -381467904, now seen corresponding path program 1 times [2024-06-14 12:10:00,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:00,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525569118] [2024-06-14 12:10:00,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:00,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:01,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:01,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525569118] [2024-06-14 12:10:01,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525569118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:01,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:01,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:10:01,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022205651] [2024-06-14 12:10:01,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:01,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:10:01,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:01,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:10:01,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:10:01,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:10:01,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 230 transitions, 2529 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:01,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:01,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:10:01,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:05,099 INFO L124 PetriNetUnfolderBase]: 12909/18287 cut-off events. [2024-06-14 12:10:05,100 INFO L125 PetriNetUnfolderBase]: For 814514/814535 co-relation queries the response was YES. [2024-06-14 12:10:05,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131405 conditions, 18287 events. 12909/18287 cut-off events. For 814514/814535 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 104626 event pairs, 4689 based on Foata normal form. 34/18299 useless extension candidates. Maximal degree in co-relation 131340. Up to 15981 conditions per place. [2024-06-14 12:10:05,306 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 174 selfloop transitions, 102 changer transitions 0/284 dead transitions. [2024-06-14 12:10:05,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 284 transitions, 3327 flow [2024-06-14 12:10:05,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:05,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:05,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-14 12:10:05,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49292452830188677 [2024-06-14 12:10:05,308 INFO L175 Difference]: Start difference. First operand has 150 places, 230 transitions, 2529 flow. Second operand 8 states and 209 transitions. [2024-06-14 12:10:05,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 284 transitions, 3327 flow [2024-06-14 12:10:05,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 284 transitions, 3089 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:05,840 INFO L231 Difference]: Finished difference. Result has 152 places, 232 transitions, 2583 flow [2024-06-14 12:10:05,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2583, PETRI_PLACES=152, PETRI_TRANSITIONS=232} [2024-06-14 12:10:05,840 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 96 predicate places. [2024-06-14 12:10:05,840 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 232 transitions, 2583 flow [2024-06-14 12:10:05,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:05,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:05,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:05,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:10:05,841 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:10:05,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:05,841 INFO L85 PathProgramCache]: Analyzing trace with hash -827747569, now seen corresponding path program 1 times [2024-06-14 12:10:05,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:05,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742225360] [2024-06-14 12:10:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:05,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:07,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:07,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742225360] [2024-06-14 12:10:07,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742225360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:07,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:07,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:07,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700231480] [2024-06-14 12:10:07,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:07,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:07,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:07,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:07,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:07,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:10:07,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 232 transitions, 2583 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-14 12:10:07,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:07,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:10:07,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:10,045 INFO L124 PetriNetUnfolderBase]: 13103/18587 cut-off events. [2024-06-14 12:10:10,045 INFO L125 PetriNetUnfolderBase]: For 843649/843665 co-relation queries the response was YES. [2024-06-14 12:10:10,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134243 conditions, 18587 events. 13103/18587 cut-off events. For 843649/843665 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 107062 event pairs, 5139 based on Foata normal form. 18/18588 useless extension candidates. Maximal degree in co-relation 134177. Up to 17626 conditions per place. [2024-06-14 12:10:10,261 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 209 selfloop transitions, 62 changer transitions 0/279 dead transitions. [2024-06-14 12:10:10,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 279 transitions, 3474 flow [2024-06-14 12:10:10,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:10,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 12:10:10,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44575471698113206 [2024-06-14 12:10:10,263 INFO L175 Difference]: Start difference. First operand has 152 places, 232 transitions, 2583 flow. Second operand 8 states and 189 transitions. [2024-06-14 12:10:10,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 279 transitions, 3474 flow [2024-06-14 12:10:11,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 279 transitions, 3198 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:11,043 INFO L231 Difference]: Finished difference. Result has 156 places, 248 transitions, 2732 flow [2024-06-14 12:10:11,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2732, PETRI_PLACES=156, PETRI_TRANSITIONS=248} [2024-06-14 12:10:11,044 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 100 predicate places. [2024-06-14 12:10:11,044 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 248 transitions, 2732 flow [2024-06-14 12:10:11,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-14 12:10:11,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:11,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:11,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:10:11,045 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:10:11,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:11,045 INFO L85 PathProgramCache]: Analyzing trace with hash -827449039, now seen corresponding path program 2 times [2024-06-14 12:10:11,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:11,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327707088] [2024-06-14 12:10:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:11,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat