./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix044_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/mix044_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/mix044_tso.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix044_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 12:31:28,700 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:31:28,753 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:31:28,756 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:31:28,756 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:31:28,769 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:31:28,773 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:31:28,773 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:31:28,774 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:31:28,776 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:31:28,777 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:31:28,777 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:31:28,778 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:31:28,779 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:31:28,779 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:31:28,779 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:31:28,780 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:31:28,780 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:31:28,780 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:31:28,780 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:31:28,781 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:31:28,781 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:31:28,781 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:31:28,781 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:31:28,782 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:31:28,782 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:31:28,782 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:31:28,782 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:31:28,783 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:31:28,783 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:31:28,784 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:31:28,784 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:31:28,784 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:31:28,785 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:31:28,785 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:31:28,785 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:31:28,785 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:31:28,785 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:31:28,786 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:31:28,786 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:31:28,786 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:31:28,786 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:31:28,786 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:31:28,787 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:31:28,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:31:28,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:31:28,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:31:28,993 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:31:28,994 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:31:28,994 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix044_tso.oepc.i [2024-06-14 12:31:30,011 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:31:30,195 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:31:30,196 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix044_tso.oepc.i [2024-06-14 12:31:30,222 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06f8107c2/ce2d9e3078214e3e82141afc9695a1ca/FLAG50368ac98 [2024-06-14 12:31:30,232 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06f8107c2/ce2d9e3078214e3e82141afc9695a1ca [2024-06-14 12:31:30,234 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:31:30,237 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:31:30,237 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix044_tso.oepc.yml/witness.yml [2024-06-14 12:31:30,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:31:30,425 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:31:30,427 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:31:30,427 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:31:30,430 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:31:30,431 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:31:30" (1/2) ... [2024-06-14 12:31:30,432 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46ee1768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:31:30, skipping insertion in model container [2024-06-14 12:31:30,433 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:31:30" (1/2) ... [2024-06-14 12:31:30,434 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7ec649cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:31:30, skipping insertion in model container [2024-06-14 12:31:30,435 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:31:30" (2/2) ... [2024-06-14 12:31:30,435 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46ee1768 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:31:30, skipping insertion in model container [2024-06-14 12:31:30,435 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:31:30" (2/2) ... [2024-06-14 12:31:30,435 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:31:30,528 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:31:30,530 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] ((((((((((((((((((((((! multithreaded || x$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) [2024-06-14 12:31:30,530 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((! multithreaded || x$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) [2024-06-14 12:31:30,530 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((! multithreaded || x$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) [2024-06-14 12:31:30,530 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] ((((((((((((((((((((((! multithreaded || x$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) [2024-06-14 12:31:30,531 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:31:30,531 INFO L106 edCorrectnessWitness]: ghost_update [L857-L857] multithreaded = 1; [2024-06-14 12:31:30,567 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:31:30,855 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:31:30,869 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 12:31:31,027 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:31:31,062 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:31:31,063 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:31:31 WrapperNode [2024-06-14 12:31:31,063 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:31:31,064 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:31:31,064 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:31:31,064 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:31:31,069 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:31:31" (1/1) ... [2024-06-14 12:31:31,099 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:31:31" (1/1) ... [2024-06-14 12:31:31,131 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 158 [2024-06-14 12:31:31,132 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:31:31,133 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:31:31,133 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:31:31,134 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:31:31,142 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:31:31" (1/1) ... [2024-06-14 12:31:31,142 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:31:31" (1/1) ... [2024-06-14 12:31:31,158 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:31:31" (1/1) ... [2024-06-14 12:31:31,177 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 12:31:31,188 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:31:31" (1/1) ... [2024-06-14 12:31:31,188 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:31:31" (1/1) ... [2024-06-14 12:31:31,196 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:31:31" (1/1) ... [2024-06-14 12:31:31,209 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:31:31" (1/1) ... [2024-06-14 12:31:31,211 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:31:31" (1/1) ... [2024-06-14 12:31:31,218 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:31:31" (1/1) ... [2024-06-14 12:31:31,221 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:31:31,224 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:31:31,224 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:31:31,224 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:31:31,225 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:31:31" (1/1) ... [2024-06-14 12:31:31,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:31:31,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:31:31,250 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 12:31:31,267 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 12:31:31,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:31:31,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:31:31,280 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:31:31,281 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:31:31,281 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:31:31,281 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:31:31,281 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:31:31,281 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:31:31,282 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 12:31:31,282 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 12:31:31,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:31:31,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:31:31,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:31:31,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:31:31,284 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 12:31:31,423 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:31:31,425 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:31:31,796 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:31:31,797 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:31:31,983 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:31:31,984 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:31:31,984 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:31:31 BoogieIcfgContainer [2024-06-14 12:31:31,984 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:31:31,986 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:31:31,986 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:31:31,989 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:31:31,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:31:30" (1/4) ... [2024-06-14 12:31:31,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d0ce96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:31:31, skipping insertion in model container [2024-06-14 12:31:31,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:31:30" (2/4) ... [2024-06-14 12:31:31,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d0ce96 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:31:31, skipping insertion in model container [2024-06-14 12:31:31,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:31:31" (3/4) ... [2024-06-14 12:31:31,991 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d0ce96 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:31:31, skipping insertion in model container [2024-06-14 12:31:31,991 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:31:31" (4/4) ... [2024-06-14 12:31:31,992 INFO L112 eAbstractionObserver]: Analyzing ICFG mix044_tso.oepc.i [2024-06-14 12:31:32,005 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:31:32,005 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 12:31:32,005 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:31:32,058 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:31:32,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 12:31:32,117 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-14 12:31:32,117 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:31:32,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:31:32,119 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 12:31:32,122 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-14 12:31:32,135 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:31:32,141 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;@7aca991c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:31:32,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 12:31:32,145 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:31:32,145 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:31:32,145 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:31:32,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:32,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:31:32,146 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 12:31:32,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:32,171 INFO L85 PathProgramCache]: Analyzing trace with hash -340332297, now seen corresponding path program 1 times [2024-06-14 12:31:32,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:32,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413671534] [2024-06-14 12:31:32,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:32,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:33,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:33,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413671534] [2024-06-14 12:31:33,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413671534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:33,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:33,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:31:33,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445187983] [2024-06-14 12:31:33,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:33,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:31:33,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:33,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:31:33,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:31:33,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:31:33,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:33,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:33,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:31:33,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:35,310 INFO L124 PetriNetUnfolderBase]: 11595/16342 cut-off events. [2024-06-14 12:31:35,310 INFO L125 PetriNetUnfolderBase]: For 213/213 co-relation queries the response was YES. [2024-06-14 12:31:35,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32480 conditions, 16342 events. 11595/16342 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 91981 event pairs, 9068 based on Foata normal form. 1/15888 useless extension candidates. Maximal degree in co-relation 32464. Up to 15685 conditions per place. [2024-06-14 12:31:35,413 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 46 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-14 12:31:35,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 239 flow [2024-06-14 12:31:35,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:31:35,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:31:35,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-06-14 12:31:35,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5802469135802469 [2024-06-14 12:31:35,425 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 94 transitions. [2024-06-14 12:31:35,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 239 flow [2024-06-14 12:31:35,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 232 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:31:35,432 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-14 12:31:35,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-14 12:31:35,436 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-14 12:31:35,436 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-14 12:31:35,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:35,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:35,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:35,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:31:35,438 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 12:31:35,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:35,438 INFO L85 PathProgramCache]: Analyzing trace with hash -641800874, now seen corresponding path program 1 times [2024-06-14 12:31:35,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:35,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768377594] [2024-06-14 12:31:35,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:35,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:36,335 INFO 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 12:31:36,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:36,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768377594] [2024-06-14 12:31:36,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768377594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:36,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:36,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:31:36,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021751939] [2024-06-14 12:31:36,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:36,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:31:36,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:36,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:31:36,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:31:36,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:31:36,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:36,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:36,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:31:36,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:38,219 INFO L124 PetriNetUnfolderBase]: 13277/18268 cut-off events. [2024-06-14 12:31:38,220 INFO L125 PetriNetUnfolderBase]: For 3270/3270 co-relation queries the response was YES. [2024-06-14 12:31:38,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41089 conditions, 18268 events. 13277/18268 cut-off events. For 3270/3270 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 99396 event pairs, 9539 based on Foata normal form. 4/18060 useless extension candidates. Maximal degree in co-relation 41074. Up to 17882 conditions per place. [2024-06-14 12:31:38,324 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 57 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-14 12:31:38,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 333 flow [2024-06-14 12:31:38,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:31:38,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:31:38,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-06-14 12:31:38,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2024-06-14 12:31:38,326 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 118 transitions. [2024-06-14 12:31:38,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 333 flow [2024-06-14 12:31:38,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:31:38,328 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-14 12:31:38,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-14 12:31:38,329 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-14 12:31:38,329 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-14 12:31:38,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:38,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:38,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:38,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:31:38,330 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 12:31:38,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:38,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1579010136, now seen corresponding path program 1 times [2024-06-14 12:31:38,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:38,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000370923] [2024-06-14 12:31:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:38,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:39,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:39,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000370923] [2024-06-14 12:31:39,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000370923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:39,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:39,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:31:39,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029411877] [2024-06-14 12:31:39,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:39,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:31:39,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:39,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:31:39,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:31:39,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:31:39,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:39,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:39,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:31:39,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:41,026 INFO L124 PetriNetUnfolderBase]: 13257/18242 cut-off events. [2024-06-14 12:31:41,026 INFO L125 PetriNetUnfolderBase]: For 9337/9337 co-relation queries the response was YES. [2024-06-14 12:31:41,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45448 conditions, 18242 events. 13257/18242 cut-off events. For 9337/9337 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 99341 event pairs, 7685 based on Foata normal form. 8/18038 useless extension candidates. Maximal degree in co-relation 45431. Up to 17812 conditions per place. [2024-06-14 12:31:41,105 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 68 selfloop transitions, 13 changer transitions 0/87 dead transitions. [2024-06-14 12:31:41,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 445 flow [2024-06-14 12:31:41,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:31:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:31:41,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-06-14 12:31:41,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-14 12:31:41,107 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 5 states and 145 transitions. [2024-06-14 12:31:41,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 445 flow [2024-06-14 12:31:41,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 87 transitions, 426 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 12:31:41,112 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 231 flow [2024-06-14 12:31:41,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-14 12:31:41,113 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 5 predicate places. [2024-06-14 12:31:41,113 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 231 flow [2024-06-14 12:31:41,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:41,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:41,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:41,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:31:41,114 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 12:31:41,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:41,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1305310231, now seen corresponding path program 1 times [2024-06-14 12:31:41,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:41,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790863234] [2024-06-14 12:31:41,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:41,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:41,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:42,367 INFO 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 12:31:42,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:42,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790863234] [2024-06-14 12:31:42,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790863234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:42,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:42,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:31:42,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830157211] [2024-06-14 12:31:42,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:42,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:31:42,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:42,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:31:42,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:31:42,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:31:42,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 231 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:42,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:42,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:31:42,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:44,491 INFO L124 PetriNetUnfolderBase]: 13241/18216 cut-off events. [2024-06-14 12:31:44,492 INFO L125 PetriNetUnfolderBase]: For 18123/18123 co-relation queries the response was YES. [2024-06-14 12:31:44,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49766 conditions, 18216 events. 13241/18216 cut-off events. For 18123/18123 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 99258 event pairs, 6594 based on Foata normal form. 8/18012 useless extension candidates. Maximal degree in co-relation 49748. Up to 17746 conditions per place. [2024-06-14 12:31:44,587 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 75 selfloop transitions, 16 changer transitions 0/97 dead transitions. [2024-06-14 12:31:44,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 97 transitions, 529 flow [2024-06-14 12:31:44,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:31:44,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:31:44,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-14 12:31:44,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154320987654321 [2024-06-14 12:31:44,591 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 231 flow. Second operand 6 states and 167 transitions. [2024-06-14 12:31:44,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 97 transitions, 529 flow [2024-06-14 12:31:44,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 97 transitions, 496 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 12:31:44,598 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 262 flow [2024-06-14 12:31:44,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-14 12:31:44,600 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2024-06-14 12:31:44,600 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 262 flow [2024-06-14 12:31:44,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:44,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:44,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:44,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:31:44,601 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 12:31:44,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:44,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1100398204, now seen corresponding path program 1 times [2024-06-14 12:31:44,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:44,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791840911] [2024-06-14 12:31:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:44,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:45,423 INFO 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 12:31:45,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:45,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791840911] [2024-06-14 12:31:45,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791840911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:45,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:45,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:31:45,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843659166] [2024-06-14 12:31:45,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:45,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:31:45,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:45,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:31:45,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:31:45,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:31:45,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:45,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:45,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:31:45,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:46,918 INFO L124 PetriNetUnfolderBase]: 11540/16272 cut-off events. [2024-06-14 12:31:46,919 INFO L125 PetriNetUnfolderBase]: For 24701/24701 co-relation queries the response was YES. [2024-06-14 12:31:46,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47321 conditions, 16272 events. 11540/16272 cut-off events. For 24701/24701 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 91496 event pairs, 6838 based on Foata normal form. 3/16033 useless extension candidates. Maximal degree in co-relation 47302. Up to 15592 conditions per place. [2024-06-14 12:31:47,018 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 62 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-14 12:31:47,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 79 transitions, 476 flow [2024-06-14 12:31:47,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:31:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:31:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 12:31:47,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2024-06-14 12:31:47,020 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 262 flow. Second operand 5 states and 124 transitions. [2024-06-14 12:31:47,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 79 transitions, 476 flow [2024-06-14 12:31:47,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 79 transitions, 430 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:31:47,026 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 281 flow [2024-06-14 12:31:47,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=281, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-14 12:31:47,033 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 8 predicate places. [2024-06-14 12:31:47,033 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 281 flow [2024-06-14 12:31:47,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:47,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:47,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:47,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:31:47,034 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 12:31:47,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:47,034 INFO L85 PathProgramCache]: Analyzing trace with hash 554865685, now seen corresponding path program 1 times [2024-06-14 12:31:47,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:47,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928578145] [2024-06-14 12:31:47,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:47,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:47,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:47,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928578145] [2024-06-14 12:31:47,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928578145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:47,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:47,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:31:47,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337917769] [2024-06-14 12:31:47,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:47,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:31:47,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:47,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:31:47,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:31:48,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-14 12:31:48,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 281 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 12:31:48,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:48,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-14 12:31:48,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:49,913 INFO L124 PetriNetUnfolderBase]: 13254/18234 cut-off events. [2024-06-14 12:31:49,914 INFO L125 PetriNetUnfolderBase]: For 40915/40915 co-relation queries the response was YES. [2024-06-14 12:31:49,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57584 conditions, 18234 events. 13254/18234 cut-off events. For 40915/40915 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 99092 event pairs, 7831 based on Foata normal form. 3/18025 useless extension candidates. Maximal degree in co-relation 57563. Up to 17833 conditions per place. [2024-06-14 12:31:50,008 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 73 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2024-06-14 12:31:50,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 93 transitions, 557 flow [2024-06-14 12:31:50,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:31:50,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:31:50,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 12:31:50,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44753086419753085 [2024-06-14 12:31:50,011 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 281 flow. Second operand 6 states and 145 transitions. [2024-06-14 12:31:50,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 93 transitions, 557 flow [2024-06-14 12:31:50,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 524 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 12:31:50,018 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 327 flow [2024-06-14 12:31:50,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-06-14 12:31:50,021 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 11 predicate places. [2024-06-14 12:31:50,021 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 327 flow [2024-06-14 12:31:50,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 12:31:50,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:50,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:50,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:31:50,022 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 12:31:50,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:50,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1478241471, now seen corresponding path program 2 times [2024-06-14 12:31:50,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:50,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593759621] [2024-06-14 12:31:50,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:50,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:50,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:50,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593759621] [2024-06-14 12:31:50,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593759621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:50,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:50,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:31:50,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488072193] [2024-06-14 12:31:50,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:50,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:31:50,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:50,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:31:50,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:31:51,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-14 12:31:51,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 327 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 12:31:51,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:51,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-14 12:31:51,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:52,740 INFO L124 PetriNetUnfolderBase]: 13245/18225 cut-off events. [2024-06-14 12:31:52,741 INFO L125 PetriNetUnfolderBase]: For 55345/55359 co-relation queries the response was YES. [2024-06-14 12:31:52,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61878 conditions, 18225 events. 13245/18225 cut-off events. For 55345/55359 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 98902 event pairs, 7782 based on Foata normal form. 15/18027 useless extension candidates. Maximal degree in co-relation 61856. Up to 17791 conditions per place. [2024-06-14 12:31:52,840 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 67 selfloop transitions, 21 changer transitions 0/94 dead transitions. [2024-06-14 12:31:52,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 94 transitions, 605 flow [2024-06-14 12:31:52,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:31:52,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:31:52,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 12:31:52,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:31:52,841 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 327 flow. Second operand 6 states and 144 transitions. [2024-06-14 12:31:52,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 94 transitions, 605 flow [2024-06-14 12:31:52,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 94 transitions, 558 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:31:52,849 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 381 flow [2024-06-14 12:31:52,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2024-06-14 12:31:52,849 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2024-06-14 12:31:52,849 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 381 flow [2024-06-14 12:31:52,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 12:31:52,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:52,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:52,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:31:52,850 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 12:31:52,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:52,851 INFO L85 PathProgramCache]: Analyzing trace with hash 920760731, now seen corresponding path program 1 times [2024-06-14 12:31:52,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:52,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798485774] [2024-06-14 12:31:52,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:52,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:54,062 INFO 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 12:31:54,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:54,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798485774] [2024-06-14 12:31:54,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798485774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:54,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:54,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:31:54,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322278717] [2024-06-14 12:31:54,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:54,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:31:54,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:54,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:31:54,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:31:54,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-14 12:31:54,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 381 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:54,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:54,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-14 12:31:54,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:56,239 INFO L124 PetriNetUnfolderBase]: 14028/19652 cut-off events. [2024-06-14 12:31:56,240 INFO L125 PetriNetUnfolderBase]: For 73873/73873 co-relation queries the response was YES. [2024-06-14 12:31:56,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69752 conditions, 19652 events. 14028/19652 cut-off events. For 73873/73873 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 109826 event pairs, 8109 based on Foata normal form. 3/19365 useless extension candidates. Maximal degree in co-relation 69729. Up to 18870 conditions per place. [2024-06-14 12:31:56,363 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 84 selfloop transitions, 20 changer transitions 0/110 dead transitions. [2024-06-14 12:31:56,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 110 transitions, 736 flow [2024-06-14 12:31:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:31:56,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:31:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-14 12:31:56,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-14 12:31:56,364 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 381 flow. Second operand 8 states and 176 transitions. [2024-06-14 12:31:56,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 110 transitions, 736 flow [2024-06-14 12:31:56,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 110 transitions, 662 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 12:31:56,376 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 447 flow [2024-06-14 12:31:56,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=447, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2024-06-14 12:31:56,377 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 19 predicate places. [2024-06-14 12:31:56,377 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 447 flow [2024-06-14 12:31:56,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:56,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:56,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:56,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:31:56,378 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 12:31:56,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:56,378 INFO L85 PathProgramCache]: Analyzing trace with hash 20848191, now seen corresponding path program 1 times [2024-06-14 12:31:56,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:56,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246777935] [2024-06-14 12:31:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:56,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:57,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:57,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246777935] [2024-06-14 12:31:57,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246777935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:57,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:57,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:31:57,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630217107] [2024-06-14 12:31:57,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:57,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:31:57,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:57,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:31:57,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:31:57,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-14 12:31:57,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 447 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:57,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:57,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-14 12:31:57,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:59,767 INFO L124 PetriNetUnfolderBase]: 15892/21828 cut-off events. [2024-06-14 12:31:59,767 INFO L125 PetriNetUnfolderBase]: For 111300/111300 co-relation queries the response was YES. [2024-06-14 12:31:59,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85070 conditions, 21828 events. 15892/21828 cut-off events. For 111300/111300 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 120651 event pairs, 7914 based on Foata normal form. 6/21580 useless extension candidates. Maximal degree in co-relation 85044. Up to 21295 conditions per place. [2024-06-14 12:31:59,874 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 95 selfloop transitions, 23 changer transitions 0/125 dead transitions. [2024-06-14 12:31:59,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 125 transitions, 845 flow [2024-06-14 12:31:59,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:31:59,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:31:59,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 12:31:59,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-14 12:31:59,877 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 447 flow. Second operand 7 states and 172 transitions. [2024-06-14 12:31:59,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 125 transitions, 845 flow [2024-06-14 12:31:59,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 125 transitions, 782 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 12:31:59,889 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 518 flow [2024-06-14 12:31:59,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=518, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2024-06-14 12:31:59,890 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2024-06-14 12:31:59,890 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 518 flow [2024-06-14 12:31:59,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:59,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:59,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:59,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:31:59,891 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 12:31:59,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:59,891 INFO L85 PathProgramCache]: Analyzing trace with hash 20968161, now seen corresponding path program 2 times [2024-06-14 12:31:59,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:59,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403464257] [2024-06-14 12:31:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:59,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:00,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:00,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403464257] [2024-06-14 12:32:00,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403464257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:00,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:00,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:00,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043706525] [2024-06-14 12:32:00,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:00,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:00,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:00,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:00,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:00,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-14 12:32:00,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 518 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:00,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:00,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-14 12:32:00,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:03,184 INFO L124 PetriNetUnfolderBase]: 16048/22046 cut-off events. [2024-06-14 12:32:03,184 INFO L125 PetriNetUnfolderBase]: For 144016/144016 co-relation queries the response was YES. [2024-06-14 12:32:03,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92968 conditions, 22046 events. 16048/22046 cut-off events. For 144016/144016 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 121868 event pairs, 7859 based on Foata normal form. 12/21804 useless extension candidates. Maximal degree in co-relation 92940. Up to 21322 conditions per place. [2024-06-14 12:32:03,538 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 97 selfloop transitions, 33 changer transitions 0/137 dead transitions. [2024-06-14 12:32:03,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 137 transitions, 1062 flow [2024-06-14 12:32:03,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:03,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:03,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 12:32:03,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-14 12:32:03,540 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 518 flow. Second operand 7 states and 177 transitions. [2024-06-14 12:32:03,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 137 transitions, 1062 flow [2024-06-14 12:32:03,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 137 transitions, 997 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 12:32:03,560 INFO L231 Difference]: Finished difference. Result has 85 places, 98 transitions, 677 flow [2024-06-14 12:32:03,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=677, PETRI_PLACES=85, PETRI_TRANSITIONS=98} [2024-06-14 12:32:03,561 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 28 predicate places. [2024-06-14 12:32:03,561 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 98 transitions, 677 flow [2024-06-14 12:32:03,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:03,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:03,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:03,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:32:03,562 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 12:32:03,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:03,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1521433317, now seen corresponding path program 3 times [2024-06-14 12:32:03,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:03,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739526333] [2024-06-14 12:32:03,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:03,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:04,530 INFO 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 12:32:04,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:04,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739526333] [2024-06-14 12:32:04,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739526333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:04,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:04,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:04,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234928439] [2024-06-14 12:32:04,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:04,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:04,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:04,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:04,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:04,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-14 12:32:04,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 98 transitions, 677 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:04,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:04,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-14 12:32:04,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:06,898 INFO L124 PetriNetUnfolderBase]: 16086/22046 cut-off events. [2024-06-14 12:32:06,898 INFO L125 PetriNetUnfolderBase]: For 182334/182376 co-relation queries the response was YES. [2024-06-14 12:32:07,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100902 conditions, 22046 events. 16086/22046 cut-off events. For 182334/182376 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 121623 event pairs, 7417 based on Foata normal form. 28/21829 useless extension candidates. Maximal degree in co-relation 100872. Up to 21184 conditions per place. [2024-06-14 12:32:07,113 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 91 selfloop transitions, 51 changer transitions 0/149 dead transitions. [2024-06-14 12:32:07,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 149 transitions, 1337 flow [2024-06-14 12:32:07,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:07,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:07,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 12:32:07,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-14 12:32:07,115 INFO L175 Difference]: Start difference. First operand has 85 places, 98 transitions, 677 flow. Second operand 7 states and 182 transitions. [2024-06-14 12:32:07,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 149 transitions, 1337 flow [2024-06-14 12:32:07,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 149 transitions, 1267 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-14 12:32:07,177 INFO L231 Difference]: Finished difference. Result has 90 places, 108 transitions, 884 flow [2024-06-14 12:32:07,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=884, PETRI_PLACES=90, PETRI_TRANSITIONS=108} [2024-06-14 12:32:07,178 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 33 predicate places. [2024-06-14 12:32:07,178 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 108 transitions, 884 flow [2024-06-14 12:32:07,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:07,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:07,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:07,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:32:07,179 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 12:32:07,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:07,179 INFO L85 PathProgramCache]: Analyzing trace with hash 198345945, now seen corresponding path program 1 times [2024-06-14 12:32:07,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:07,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893624953] [2024-06-14 12:32:07,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:07,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:08,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:08,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893624953] [2024-06-14 12:32:08,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893624953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:08,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:08,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:08,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269544001] [2024-06-14 12:32:08,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:08,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:08,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:08,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:08,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:08,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-14 12:32:08,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 108 transitions, 884 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:08,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:08,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-14 12:32:08,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:10,822 INFO L124 PetriNetUnfolderBase]: 14420/20119 cut-off events. [2024-06-14 12:32:10,823 INFO L125 PetriNetUnfolderBase]: For 189759/189759 co-relation queries the response was YES. [2024-06-14 12:32:10,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95358 conditions, 20119 events. 14420/20119 cut-off events. For 189759/189759 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 111924 event pairs, 6574 based on Foata normal form. 6/19818 useless extension candidates. Maximal degree in co-relation 95325. Up to 19377 conditions per place. [2024-06-14 12:32:10,982 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 121 selfloop transitions, 22 changer transitions 0/149 dead transitions. [2024-06-14 12:32:10,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 149 transitions, 1324 flow [2024-06-14 12:32:10,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:10,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:10,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 12:32:10,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-14 12:32:10,984 INFO L175 Difference]: Start difference. First operand has 90 places, 108 transitions, 884 flow. Second operand 8 states and 186 transitions. [2024-06-14 12:32:10,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 149 transitions, 1324 flow [2024-06-14 12:32:11,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 149 transitions, 1175 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-14 12:32:11,084 INFO L231 Difference]: Finished difference. Result has 94 places, 111 transitions, 851 flow [2024-06-14 12:32:11,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=851, PETRI_PLACES=94, PETRI_TRANSITIONS=111} [2024-06-14 12:32:11,085 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2024-06-14 12:32:11,085 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 111 transitions, 851 flow [2024-06-14 12:32:11,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:11,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:11,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:11,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:32:11,086 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:32:11,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:11,086 INFO L85 PathProgramCache]: Analyzing trace with hash -522772040, now seen corresponding path program 1 times [2024-06-14 12:32:11,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:11,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368469270] [2024-06-14 12:32:11,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:11,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:12,225 INFO 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 12:32:12,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:12,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368469270] [2024-06-14 12:32:12,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368469270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:12,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:12,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:32:12,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443982797] [2024-06-14 12:32:12,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:12,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:32:12,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:12,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:32:12,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:32:12,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-14 12:32:12,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 111 transitions, 851 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:12,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:12,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-14 12:32:12,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:14,344 INFO L124 PetriNetUnfolderBase]: 14413/20354 cut-off events. [2024-06-14 12:32:14,345 INFO L125 PetriNetUnfolderBase]: For 194433/194433 co-relation queries the response was YES. [2024-06-14 12:32:14,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95273 conditions, 20354 events. 14413/20354 cut-off events. For 194433/194433 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 115337 event pairs, 6681 based on Foata normal form. 2/20153 useless extension candidates. Maximal degree in co-relation 95239. Up to 19434 conditions per place. [2024-06-14 12:32:14,511 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 111 selfloop transitions, 11 changer transitions 0/128 dead transitions. [2024-06-14 12:32:14,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 128 transitions, 1175 flow [2024-06-14 12:32:14,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:32:14,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:32:14,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-14 12:32:14,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42962962962962964 [2024-06-14 12:32:14,512 INFO L175 Difference]: Start difference. First operand has 94 places, 111 transitions, 851 flow. Second operand 5 states and 116 transitions. [2024-06-14 12:32:14,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 128 transitions, 1175 flow [2024-06-14 12:32:14,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 128 transitions, 1089 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:32:14,592 INFO L231 Difference]: Finished difference. Result has 93 places, 115 transitions, 850 flow [2024-06-14 12:32:14,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=850, PETRI_PLACES=93, PETRI_TRANSITIONS=115} [2024-06-14 12:32:14,593 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 36 predicate places. [2024-06-14 12:32:14,593 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 115 transitions, 850 flow [2024-06-14 12:32:14,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:14,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:14,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:14,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:32:14,594 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:32:14,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:14,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1597913324, now seen corresponding path program 1 times [2024-06-14 12:32:14,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:14,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586087824] [2024-06-14 12:32:14,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:14,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:15,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:15,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586087824] [2024-06-14 12:32:15,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586087824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:15,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:15,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:15,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525809360] [2024-06-14 12:32:15,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:15,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:15,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:15,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:15,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:15,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-14 12:32:15,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 115 transitions, 850 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:15,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:15,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-14 12:32:15,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:18,346 INFO L124 PetriNetUnfolderBase]: 16055/22133 cut-off events. [2024-06-14 12:32:18,346 INFO L125 PetriNetUnfolderBase]: For 261611/261643 co-relation queries the response was YES. [2024-06-14 12:32:18,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112932 conditions, 22133 events. 16055/22133 cut-off events. For 261611/261643 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 123101 event pairs, 7350 based on Foata normal form. 11/21934 useless extension candidates. Maximal degree in co-relation 112897. Up to 21510 conditions per place. [2024-06-14 12:32:18,512 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 123 selfloop transitions, 26 changer transitions 0/156 dead transitions. [2024-06-14 12:32:18,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 156 transitions, 1319 flow [2024-06-14 12:32:18,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:18,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 12:32:18,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-14 12:32:18,513 INFO L175 Difference]: Start difference. First operand has 93 places, 115 transitions, 850 flow. Second operand 7 states and 172 transitions. [2024-06-14 12:32:18,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 156 transitions, 1319 flow [2024-06-14 12:32:18,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 156 transitions, 1264 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 12:32:18,587 INFO L231 Difference]: Finished difference. Result has 97 places, 119 transitions, 940 flow [2024-06-14 12:32:18,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=940, PETRI_PLACES=97, PETRI_TRANSITIONS=119} [2024-06-14 12:32:18,588 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 40 predicate places. [2024-06-14 12:32:18,588 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 119 transitions, 940 flow [2024-06-14 12:32:18,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:18,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:18,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:18,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:32:18,588 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 12:32:18,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:18,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1646828118, now seen corresponding path program 1 times [2024-06-14 12:32:18,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:18,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722490986] [2024-06-14 12:32:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:18,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:19,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:19,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722490986] [2024-06-14 12:32:19,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722490986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:19,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:19,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:19,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715801959] [2024-06-14 12:32:19,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:19,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:19,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:19,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:19,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:19,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-14 12:32:19,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 119 transitions, 940 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:19,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:19,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-14 12:32:19,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:22,949 INFO L124 PetriNetUnfolderBase]: 16408/22502 cut-off events. [2024-06-14 12:32:22,949 INFO L125 PetriNetUnfolderBase]: For 278857/278857 co-relation queries the response was YES. [2024-06-14 12:32:23,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113589 conditions, 22502 events. 16408/22502 cut-off events. For 278857/278857 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 121562 event pairs, 7162 based on Foata normal form. 9/22287 useless extension candidates. Maximal degree in co-relation 113553. Up to 21721 conditions per place. [2024-06-14 12:32:23,110 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 124 selfloop transitions, 49 changer transitions 0/178 dead transitions. [2024-06-14 12:32:23,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 178 transitions, 1554 flow [2024-06-14 12:32:23,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:23,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:23,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 12:32:23,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4398148148148148 [2024-06-14 12:32:23,112 INFO L175 Difference]: Start difference. First operand has 97 places, 119 transitions, 940 flow. Second operand 8 states and 190 transitions. [2024-06-14 12:32:23,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 178 transitions, 1554 flow [2024-06-14 12:32:23,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 178 transitions, 1402 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-14 12:32:23,212 INFO L231 Difference]: Finished difference. Result has 101 places, 134 transitions, 1066 flow [2024-06-14 12:32:23,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1066, PETRI_PLACES=101, PETRI_TRANSITIONS=134} [2024-06-14 12:32:23,212 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 44 predicate places. [2024-06-14 12:32:23,213 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 134 transitions, 1066 flow [2024-06-14 12:32:23,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:23,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:23,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:23,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:32:23,213 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 12:32:23,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:23,214 INFO L85 PathProgramCache]: Analyzing trace with hash 80214522, now seen corresponding path program 2 times [2024-06-14 12:32:23,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:23,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885162494] [2024-06-14 12:32:23,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:23,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:24,660 INFO 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 12:32:24,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:24,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885162494] [2024-06-14 12:32:24,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885162494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:24,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:24,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:24,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147224449] [2024-06-14 12:32:24,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:24,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:24,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:24,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:24,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:24,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-14 12:32:24,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 134 transitions, 1066 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:24,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:24,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-14 12:32:24,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:27,409 INFO L124 PetriNetUnfolderBase]: 16452/22564 cut-off events. [2024-06-14 12:32:27,409 INFO L125 PetriNetUnfolderBase]: For 304847/304857 co-relation queries the response was YES. [2024-06-14 12:32:27,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116610 conditions, 22564 events. 16452/22564 cut-off events. For 304847/304857 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 121779 event pairs, 7163 based on Foata normal form. 11/22350 useless extension candidates. Maximal degree in co-relation 116572. Up to 21984 conditions per place. [2024-06-14 12:32:27,548 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 142 selfloop transitions, 35 changer transitions 0/182 dead transitions. [2024-06-14 12:32:27,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 182 transitions, 1624 flow [2024-06-14 12:32:27,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:27,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:27,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 12:32:27,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236111111111111 [2024-06-14 12:32:27,549 INFO L175 Difference]: Start difference. First operand has 101 places, 134 transitions, 1066 flow. Second operand 8 states and 183 transitions. [2024-06-14 12:32:27,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 182 transitions, 1624 flow [2024-06-14 12:32:27,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 182 transitions, 1546 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 12:32:27,656 INFO L231 Difference]: Finished difference. Result has 106 places, 143 transitions, 1185 flow [2024-06-14 12:32:27,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=990, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1185, PETRI_PLACES=106, PETRI_TRANSITIONS=143} [2024-06-14 12:32:27,656 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 49 predicate places. [2024-06-14 12:32:27,656 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 143 transitions, 1185 flow [2024-06-14 12:32:27,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:27,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:27,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:27,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:32:27,657 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 12:32:27,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:27,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1531556266, now seen corresponding path program 3 times [2024-06-14 12:32:27,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:27,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125317594] [2024-06-14 12:32:27,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:27,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:28,800 INFO 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 12:32:28,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:28,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125317594] [2024-06-14 12:32:28,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125317594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:28,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:28,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:28,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539902285] [2024-06-14 12:32:28,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:28,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:28,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:28,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:28,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:28,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-14 12:32:28,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 143 transitions, 1185 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:28,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:28,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-14 12:32:28,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:31,701 INFO L124 PetriNetUnfolderBase]: 16562/22718 cut-off events. [2024-06-14 12:32:31,701 INFO L125 PetriNetUnfolderBase]: For 335344/335354 co-relation queries the response was YES. [2024-06-14 12:32:31,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120180 conditions, 22718 events. 16562/22718 cut-off events. For 335344/335354 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 122725 event pairs, 7162 based on Foata normal form. 17/22508 useless extension candidates. Maximal degree in co-relation 120139. Up to 21774 conditions per place. [2024-06-14 12:32:31,846 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 125 selfloop transitions, 75 changer transitions 0/205 dead transitions. [2024-06-14 12:32:31,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 205 transitions, 1882 flow [2024-06-14 12:32:31,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:31,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:31,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 12:32:31,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:32:31,854 INFO L175 Difference]: Start difference. First operand has 106 places, 143 transitions, 1185 flow. Second operand 8 states and 192 transitions. [2024-06-14 12:32:31,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 205 transitions, 1882 flow [2024-06-14 12:32:31,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 205 transitions, 1763 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 12:32:31,969 INFO L231 Difference]: Finished difference. Result has 110 places, 161 transitions, 1438 flow [2024-06-14 12:32:31,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1438, PETRI_PLACES=110, PETRI_TRANSITIONS=161} [2024-06-14 12:32:31,970 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 53 predicate places. [2024-06-14 12:32:31,970 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 161 transitions, 1438 flow [2024-06-14 12:32:31,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:31,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:31,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:31,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:32:31,971 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 12:32:31,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:31,971 INFO L85 PathProgramCache]: Analyzing trace with hash 87833082, now seen corresponding path program 4 times [2024-06-14 12:32:31,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:31,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654916680] [2024-06-14 12:32:31,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:31,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:33,537 INFO 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 12:32:33,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:33,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654916680] [2024-06-14 12:32:33,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654916680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:33,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:33,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:33,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255836831] [2024-06-14 12:32:33,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:33,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:33,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:33,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:33,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:33,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-14 12:32:33,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 161 transitions, 1438 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:33,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:33,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-14 12:32:33,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:36,523 INFO L124 PetriNetUnfolderBase]: 16541/22684 cut-off events. [2024-06-14 12:32:36,523 INFO L125 PetriNetUnfolderBase]: For 364739/364749 co-relation queries the response was YES. [2024-06-14 12:32:36,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123154 conditions, 22684 events. 16541/22684 cut-off events. For 364739/364749 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 122470 event pairs, 7179 based on Foata normal form. 11/22470 useless extension candidates. Maximal degree in co-relation 123111. Up to 22044 conditions per place. [2024-06-14 12:32:36,935 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 157 selfloop transitions, 56 changer transitions 0/218 dead transitions. [2024-06-14 12:32:36,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 218 transitions, 2160 flow [2024-06-14 12:32:36,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:32:36,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:32:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-14 12:32:36,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2024-06-14 12:32:36,937 INFO L175 Difference]: Start difference. First operand has 110 places, 161 transitions, 1438 flow. Second operand 9 states and 204 transitions. [2024-06-14 12:32:36,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 218 transitions, 2160 flow [2024-06-14 12:32:37,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 218 transitions, 2040 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-14 12:32:37,111 INFO L231 Difference]: Finished difference. Result has 119 places, 173 transitions, 1672 flow [2024-06-14 12:32:37,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1362, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1672, PETRI_PLACES=119, PETRI_TRANSITIONS=173} [2024-06-14 12:32:37,112 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 62 predicate places. [2024-06-14 12:32:37,112 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 173 transitions, 1672 flow [2024-06-14 12:32:37,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:37,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:37,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:37,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:32:37,112 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:32:37,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:37,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1000749776, now seen corresponding path program 1 times [2024-06-14 12:32:37,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:37,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358317168] [2024-06-14 12:32:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:37,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:38,158 INFO 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 12:32:38,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:38,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358317168] [2024-06-14 12:32:38,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358317168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:38,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:38,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:38,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370737443] [2024-06-14 12:32:38,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:38,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:38,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:38,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:38,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:38,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-14 12:32:38,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 173 transitions, 1672 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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 12:32:38,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:38,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-14 12:32:38,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:40,813 INFO L124 PetriNetUnfolderBase]: 14495/20436 cut-off events. [2024-06-14 12:32:40,813 INFO L125 PetriNetUnfolderBase]: For 329859/329859 co-relation queries the response was YES. [2024-06-14 12:32:40,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109987 conditions, 20436 events. 14495/20436 cut-off events. For 329859/329859 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 114728 event pairs, 6101 based on Foata normal form. 6/20225 useless extension candidates. Maximal degree in co-relation 109940. Up to 19496 conditions per place. [2024-06-14 12:32:41,004 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 179 selfloop transitions, 23 changer transitions 0/208 dead transitions. [2024-06-14 12:32:41,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 208 transitions, 2336 flow [2024-06-14 12:32:41,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:32:41,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:32:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 12:32:41,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44135802469135804 [2024-06-14 12:32:41,006 INFO L175 Difference]: Start difference. First operand has 119 places, 173 transitions, 1672 flow. Second operand 6 states and 143 transitions. [2024-06-14 12:32:41,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 208 transitions, 2336 flow [2024-06-14 12:32:41,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 208 transitions, 2230 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 12:32:41,212 INFO L231 Difference]: Finished difference. Result has 124 places, 187 transitions, 1793 flow [2024-06-14 12:32:41,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1793, PETRI_PLACES=124, PETRI_TRANSITIONS=187} [2024-06-14 12:32:41,212 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 67 predicate places. [2024-06-14 12:32:41,212 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 187 transitions, 1793 flow [2024-06-14 12:32:41,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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 12:32:41,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:41,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:41,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:32:41,213 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 12:32:41,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:41,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1709292662, now seen corresponding path program 1 times [2024-06-14 12:32:41,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:41,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219598999] [2024-06-14 12:32:41,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:41,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:42,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:42,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219598999] [2024-06-14 12:32:42,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219598999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:42,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:42,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:42,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251243037] [2024-06-14 12:32:42,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:42,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:42,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:42,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:42,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:42,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-14 12:32:42,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 187 transitions, 1793 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:42,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:42,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-14 12:32:42,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:46,346 INFO L124 PetriNetUnfolderBase]: 15931/22309 cut-off events. [2024-06-14 12:32:46,346 INFO L125 PetriNetUnfolderBase]: For 454936/454960 co-relation queries the response was YES. [2024-06-14 12:32:46,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129742 conditions, 22309 events. 15931/22309 cut-off events. For 454936/454960 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 126047 event pairs, 5737 based on Foata normal form. 6/22267 useless extension candidates. Maximal degree in co-relation 129692. Up to 21394 conditions per place. [2024-06-14 12:32:46,534 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 200 selfloop transitions, 24 changer transitions 0/235 dead transitions. [2024-06-14 12:32:46,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 235 transitions, 2431 flow [2024-06-14 12:32:46,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 12:32:46,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44675925925925924 [2024-06-14 12:32:46,537 INFO L175 Difference]: Start difference. First operand has 124 places, 187 transitions, 1793 flow. Second operand 8 states and 193 transitions. [2024-06-14 12:32:46,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 235 transitions, 2431 flow [2024-06-14 12:32:46,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 235 transitions, 2385 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-14 12:32:46,855 INFO L231 Difference]: Finished difference. Result has 131 places, 190 transitions, 1881 flow [2024-06-14 12:32:46,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1881, PETRI_PLACES=131, PETRI_TRANSITIONS=190} [2024-06-14 12:32:46,855 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 74 predicate places. [2024-06-14 12:32:46,856 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 190 transitions, 1881 flow [2024-06-14 12:32:46,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:46,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:46,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:46,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:32:46,856 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:32:46,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:46,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1709353112, now seen corresponding path program 2 times [2024-06-14 12:32:46,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:46,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083674337] [2024-06-14 12:32:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:46,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:48,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:48,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083674337] [2024-06-14 12:32:48,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083674337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:48,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:48,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:48,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839795631] [2024-06-14 12:32:48,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:48,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:48,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:48,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:48,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:48,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-14 12:32:48,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 190 transitions, 1881 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:48,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:48,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-14 12:32:48,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:51,717 INFO L124 PetriNetUnfolderBase]: 15995/22405 cut-off events. [2024-06-14 12:32:51,717 INFO L125 PetriNetUnfolderBase]: For 512682/512698 co-relation queries the response was YES. [2024-06-14 12:32:51,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134642 conditions, 22405 events. 15995/22405 cut-off events. For 512682/512698 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 126932 event pairs, 6450 based on Foata normal form. 12/22384 useless extension candidates. Maximal degree in co-relation 134589. Up to 21441 conditions per place. [2024-06-14 12:32:51,935 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 192 selfloop transitions, 35 changer transitions 0/238 dead transitions. [2024-06-14 12:32:51,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 238 transitions, 2533 flow [2024-06-14 12:32:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:51,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:51,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 12:32:51,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44907407407407407 [2024-06-14 12:32:51,937 INFO L175 Difference]: Start difference. First operand has 131 places, 190 transitions, 1881 flow. Second operand 8 states and 194 transitions. [2024-06-14 12:32:51,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 238 transitions, 2533 flow [2024-06-14 12:32:52,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 238 transitions, 2425 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:32:52,318 INFO L231 Difference]: Finished difference. Result has 133 places, 193 transitions, 1938 flow [2024-06-14 12:32:52,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1938, PETRI_PLACES=133, PETRI_TRANSITIONS=193} [2024-06-14 12:32:52,319 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 76 predicate places. [2024-06-14 12:32:52,319 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 193 transitions, 1938 flow [2024-06-14 12:32:52,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:52,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:52,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:52,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:32:52,319 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 12:32:52,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:52,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1324397216, now seen corresponding path program 3 times [2024-06-14 12:32:52,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:52,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090387639] [2024-06-14 12:32:52,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:52,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat