./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix037_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/mix037_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/mix037_tso.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix037_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-bcb38a6-m [2024-06-04 15:11:27,748 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 15:11:27,811 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 15:11:27,814 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 15:11:27,815 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 15:11:27,834 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 15:11:27,835 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 15:11:27,835 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 15:11:27,835 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 15:11:27,836 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 15:11:27,836 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 15:11:27,836 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 15:11:27,837 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 15:11:27,837 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 15:11:27,837 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 15:11:27,837 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 15:11:27,838 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 15:11:27,838 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 15:11:27,838 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 15:11:27,838 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 15:11:27,839 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 15:11:27,843 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 15:11:27,843 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 15:11:27,844 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 15:11:27,846 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 15:11:27,847 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 15:11:27,847 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 15:11:27,848 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 15:11:27,848 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 15:11:27,848 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 15:11:27,849 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 15:11:27,849 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 15:11:27,850 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:11:27,850 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 15:11:27,850 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 15:11:27,850 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 15:11:27,850 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 15:11:27,850 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 15:11:27,851 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 15:11:27,851 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 15:11:27,851 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 15:11:27,851 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 15:11:27,851 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 15:11:27,852 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 15:11:28,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 15:11:28,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 15:11:28,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 15:11:28,073 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 15:11:28,073 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 15:11:28,074 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix037_tso.oepc.i [2024-06-04 15:11:29,115 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 15:11:29,322 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 15:11:29,323 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix037_tso.oepc.i [2024-06-04 15:11:29,333 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f597428b/e2810d9c79234fd085f09f0fb257e649/FLAG1633f6954 [2024-06-04 15:11:29,343 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f597428b/e2810d9c79234fd085f09f0fb257e649 [2024-06-04 15:11:29,345 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 15:11:29,348 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 15:11:29,348 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix037_tso.oepc.yml/witness.yml [2024-06-04 15:11:29,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 15:11:29,539 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 15:11:29,540 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 15:11:29,540 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 15:11:29,545 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 15:11:29,545 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:11:29" (1/2) ... [2024-06-04 15:11:29,547 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3969e417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:11:29, skipping insertion in model container [2024-06-04 15:11:29,547 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:11:29" (1/2) ... [2024-06-04 15:11:29,548 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3e81585c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:11:29, skipping insertion in model container [2024-06-04 15:11:29,548 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:11:29" (2/2) ... [2024-06-04 15:11:29,549 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3969e417 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:11:29, skipping insertion in model container [2024-06-04 15:11:29,549 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:11:29" (2/2) ... [2024-06-04 15:11:29,549 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 15:11:29,667 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 15:11:29,669 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] (((((((((((((((((((((((! multithreaded || x$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_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 || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-04 15:11:29,669 INFO L97 edCorrectnessWitness]: Location invariant before [L865-L865] (((((((((((((((((((((((! multithreaded || x$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! 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 || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! 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)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-04 15:11:29,669 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] (((((((((((((((((((((((! multithreaded || x$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_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 || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-04 15:11:29,670 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] (((((((((((((((((((((((! multithreaded || x$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! 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 || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! 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)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-04 15:11:29,670 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 15:11:29,670 INFO L106 edCorrectnessWitness]: ghost_update [L859-L859] multithreaded = 1; [2024-06-04 15:11:29,708 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 15:11:30,004 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:11:30,018 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 15:11:30,128 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:11:30,156 INFO L206 MainTranslator]: Completed translation [2024-06-04 15:11:30,156 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:11:30 WrapperNode [2024-06-04 15:11:30,156 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 15:11:30,158 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 15:11:30,158 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 15:11:30,158 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 15:11:30,163 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 04.06 03:11:30" (1/1) ... [2024-06-04 15:11:30,188 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 04.06 03:11:30" (1/1) ... [2024-06-04 15:11:30,227 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 159 [2024-06-04 15:11:30,227 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 15:11:30,228 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 15:11:30,228 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 15:11:30,228 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 15:11:30,236 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:11:30" (1/1) ... [2024-06-04 15:11:30,241 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:11:30" (1/1) ... [2024-06-04 15:11:30,244 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:11:30" (1/1) ... [2024-06-04 15:11:30,259 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]. [2024-06-04 15:11:30,262 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:11:30" (1/1) ... [2024-06-04 15:11:30,262 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:11:30" (1/1) ... [2024-06-04 15:11:30,271 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:11:30" (1/1) ... [2024-06-04 15:11:30,285 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:11:30" (1/1) ... [2024-06-04 15:11:30,287 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:11:30" (1/1) ... [2024-06-04 15:11:30,289 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:11:30" (1/1) ... [2024-06-04 15:11:30,294 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 15:11:30,295 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 15:11:30,295 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 15:11:30,295 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 15:11:30,295 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:11:30" (1/1) ... [2024-06-04 15:11:30,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:11:30,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 15:11:30,333 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) [2024-06-04 15:11:30,356 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 [2024-06-04 15:11:30,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 15:11:30,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 15:11:30,366 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 15:11:30,366 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 15:11:30,366 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 15:11:30,366 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 15:11:30,367 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 15:11:30,367 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 15:11:30,367 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-04 15:11:30,367 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-04 15:11:30,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 15:11:30,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 15:11:30,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 15:11:30,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 15:11:30,373 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 15:11:30,545 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 15:11:30,547 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 15:11:30,956 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 15:11:30,957 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 15:11:31,104 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 15:11:31,104 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 15:11:31,105 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:11:31 BoogieIcfgContainer [2024-06-04 15:11:31,105 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 15:11:31,107 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 15:11:31,107 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 15:11:31,109 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 15:11:31,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 03:11:29" (1/4) ... [2024-06-04 15:11:31,110 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e9afad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:11:31, skipping insertion in model container [2024-06-04 15:11:31,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:11:29" (2/4) ... [2024-06-04 15:11:31,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e9afad and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:11:31, skipping insertion in model container [2024-06-04 15:11:31,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:11:30" (3/4) ... [2024-06-04 15:11:31,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e9afad and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:11:31, skipping insertion in model container [2024-06-04 15:11:31,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:11:31" (4/4) ... [2024-06-04 15:11:31,116 INFO L112 eAbstractionObserver]: Analyzing ICFG mix037_tso.oepc.i [2024-06-04 15:11:31,130 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 15:11:31,131 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-04 15:11:31,131 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 15:11:31,174 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 15:11:31,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-04 15:11:31,233 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-04 15:11:31,234 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:11:31,235 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 82 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. [2024-06-04 15:11:31,235 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-04 15:11:31,238 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-04 15:11:31,247 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 15:11:31,253 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;@2d495ae2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 15:11:31,253 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-04 15:11:31,257 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 15:11:31,258 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 15:11:31,258 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:11:31,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:11:31,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 15:11:31,259 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)] === [2024-06-04 15:11:31,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:11:31,263 INFO L85 PathProgramCache]: Analyzing trace with hash -242823295, now seen corresponding path program 1 times [2024-06-04 15:11:31,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:11:31,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284443593] [2024-06-04 15:11:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:11:31,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:11:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:11:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:11:32,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:11:32,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284443593] [2024-06-04 15:11:32,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284443593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:11:32,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:11:32,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 15:11:32,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273113134] [2024-06-04 15:11:32,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:11:32,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 15:11:32,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:11:32,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 15:11:32,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 15:11:32,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:11:32,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:32,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:11:32,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:11:32,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:11:34,058 INFO L124 PetriNetUnfolderBase]: 9587/13794 cut-off events. [2024-06-04 15:11:34,058 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-06-04 15:11:34,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27204 conditions, 13794 events. 9587/13794 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 79723 event pairs, 7462 based on Foata normal form. 1/13423 useless extension candidates. Maximal degree in co-relation 27188. Up to 13017 conditions per place. [2024-06-04 15:11:34,134 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 45 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-04 15:11:34,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 237 flow [2024-06-04 15:11:34,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 15:11:34,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 15:11:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-04 15:11:34,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-04 15:11:34,145 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 96 transitions. [2024-06-04 15:11:34,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 237 flow [2024-06-04 15:11:34,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 230 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 15:11:34,156 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-04 15:11:34,158 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} [2024-06-04 15:11:34,160 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-04 15:11:34,161 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-04 15:11:34,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:34,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:11:34,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:11:34,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 15:11:34,162 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)] === [2024-06-04 15:11:34,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:11:34,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1424918880, now seen corresponding path program 1 times [2024-06-04 15:11:34,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:11:34,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616282055] [2024-06-04 15:11:34,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:11:34,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:11:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:11:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:11:35,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:11:35,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616282055] [2024-06-04 15:11:35,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616282055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:11:35,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:11:35,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 15:11:35,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279529723] [2024-06-04 15:11:35,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:11:35,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 15:11:35,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:11:35,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 15:11:35,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 15:11:35,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 15:11:35,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:35,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:11:35,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 15:11:35,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:11:36,699 INFO L124 PetriNetUnfolderBase]: 10972/15333 cut-off events. [2024-06-04 15:11:36,699 INFO L125 PetriNetUnfolderBase]: For 2791/2791 co-relation queries the response was YES. [2024-06-04 15:11:36,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34434 conditions, 15333 events. 10972/15333 cut-off events. For 2791/2791 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 85167 event pairs, 7834 based on Foata normal form. 4/15156 useless extension candidates. Maximal degree in co-relation 34419. Up to 14827 conditions per place. [2024-06-04 15:11:36,763 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 56 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-04 15:11:36,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 331 flow [2024-06-04 15:11:36,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 15:11:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 15:11:36,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-04 15:11:36,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5601851851851852 [2024-06-04 15:11:36,765 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 121 transitions. [2024-06-04 15:11:36,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 331 flow [2024-06-04 15:11:36,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 15:11:36,767 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-04 15:11:36,767 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} [2024-06-04 15:11:36,768 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-04 15:11:36,768 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-04 15:11:36,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:36,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:11:36,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:11:36,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 15:11:36,769 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)] === [2024-06-04 15:11:36,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:11:36,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1222811208, now seen corresponding path program 1 times [2024-06-04 15:11:36,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:11:36,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688953506] [2024-06-04 15:11:36,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:11:36,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:11:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:11:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:11:37,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:11:37,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688953506] [2024-06-04 15:11:37,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688953506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:11:37,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:11:37,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 15:11:37,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978575174] [2024-06-04 15:11:37,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:11:37,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 15:11:37,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:11:37,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 15:11:37,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 15:11:37,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 15:11:37,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:37,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:11:37,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 15:11:37,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:11:39,229 INFO L124 PetriNetUnfolderBase]: 10952/15311 cut-off events. [2024-06-04 15:11:39,230 INFO L125 PetriNetUnfolderBase]: For 7977/7977 co-relation queries the response was YES. [2024-06-04 15:11:39,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38192 conditions, 15311 events. 10952/15311 cut-off events. For 7977/7977 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 85100 event pairs, 6286 based on Foata normal form. 8/15138 useless extension candidates. Maximal degree in co-relation 38175. Up to 14757 conditions per place. [2024-06-04 15:11:39,295 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 67 selfloop transitions, 13 changer transitions 0/87 dead transitions. [2024-06-04 15:11:39,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 443 flow [2024-06-04 15:11:39,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:11:39,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:11:39,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-04 15:11:39,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5518518518518518 [2024-06-04 15:11:39,300 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 5 states and 149 transitions. [2024-06-04 15:11:39,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 443 flow [2024-06-04 15:11:39,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 87 transitions, 424 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-04 15:11:39,305 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 231 flow [2024-06-04 15:11:39,305 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} [2024-06-04 15:11:39,306 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 5 predicate places. [2024-06-04 15:11:39,306 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 231 flow [2024-06-04 15:11:39,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:39,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:11:39,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:11:39,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 15:11:39,307 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)] === [2024-06-04 15:11:39,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:11:39,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1737777235, now seen corresponding path program 1 times [2024-06-04 15:11:39,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:11:39,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722324343] [2024-06-04 15:11:39,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:11:39,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:11:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:11:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:11:40,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:11:40,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722324343] [2024-06-04 15:11:40,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722324343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:11:40,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:11:40,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:11:40,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011122141] [2024-06-04 15:11:40,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:11:40,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:11:40,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:11:40,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:11:40,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:11:40,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 15:11:40,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 231 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:40,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:11:40,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 15:11:40,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:11:42,107 INFO L124 PetriNetUnfolderBase]: 10936/15289 cut-off events. [2024-06-04 15:11:42,107 INFO L125 PetriNetUnfolderBase]: For 15460/15460 co-relation queries the response was YES. [2024-06-04 15:11:42,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41909 conditions, 15289 events. 10936/15289 cut-off events. For 15460/15460 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 84860 event pairs, 5376 based on Foata normal form. 8/15116 useless extension candidates. Maximal degree in co-relation 41891. Up to 14691 conditions per place. [2024-06-04 15:11:42,205 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 74 selfloop transitions, 16 changer transitions 0/97 dead transitions. [2024-06-04 15:11:42,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 97 transitions, 527 flow [2024-06-04 15:11:42,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:11:42,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:11:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-04 15:11:42,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5308641975308642 [2024-06-04 15:11:42,207 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 231 flow. Second operand 6 states and 172 transitions. [2024-06-04 15:11:42,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 97 transitions, 527 flow [2024-06-04 15:11:42,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 97 transitions, 494 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 15:11:42,214 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 262 flow [2024-06-04 15:11:42,215 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} [2024-06-04 15:11:42,216 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2024-06-04 15:11:42,216 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 262 flow [2024-06-04 15:11:42,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:42,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:11:42,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:11:42,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 15:11:42,217 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)] === [2024-06-04 15:11:42,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:11:42,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1151033374, now seen corresponding path program 1 times [2024-06-04 15:11:42,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:11:42,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47521927] [2024-06-04 15:11:42,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:11:42,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:11:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:11:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:11:43,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:11:43,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47521927] [2024-06-04 15:11:43,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47521927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:11:43,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:11:43,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:11:43,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514323531] [2024-06-04 15:11:43,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:11:43,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:11:43,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:11:43,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:11:43,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:11:43,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 15:11:43,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:43,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:11:43,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 15:11:43,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:11:44,816 INFO L124 PetriNetUnfolderBase]: 9532/13781 cut-off events. [2024-06-04 15:11:44,817 INFO L125 PetriNetUnfolderBase]: For 21041/21041 co-relation queries the response was YES. [2024-06-04 15:11:44,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40044 conditions, 13781 events. 9532/13781 cut-off events. For 21041/21041 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 80005 event pairs, 5590 based on Foata normal form. 3/13633 useless extension candidates. Maximal degree in co-relation 40025. Up to 12924 conditions per place. [2024-06-04 15:11:44,914 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 61 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-04 15:11:44,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 79 transitions, 474 flow [2024-06-04 15:11:44,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:11:44,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:11:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-04 15:11:44,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2024-06-04 15:11:44,915 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 262 flow. Second operand 5 states and 128 transitions. [2024-06-04 15:11:44,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 79 transitions, 474 flow [2024-06-04 15:11:44,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 79 transitions, 428 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 15:11:44,922 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 281 flow [2024-06-04 15:11:44,922 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} [2024-06-04 15:11:44,922 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 8 predicate places. [2024-06-04 15:11:44,922 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 281 flow [2024-06-04 15:11:44,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:44,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:11:44,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:11:44,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 15:11:44,923 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)] === [2024-06-04 15:11:44,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:11:44,924 INFO L85 PathProgramCache]: Analyzing trace with hash -22144255, now seen corresponding path program 1 times [2024-06-04 15:11:44,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:11:44,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928611776] [2024-06-04 15:11:44,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:11:44,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:11:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:11:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:11:45,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:11:45,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928611776] [2024-06-04 15:11:45,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928611776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:11:45,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:11:45,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:11:45,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852411193] [2024-06-04 15:11:45,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:11:45,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:11:45,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:11:45,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:11:45,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:11:46,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:11:46,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 281 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:46,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:11:46,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:11:46,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:11:47,526 INFO L124 PetriNetUnfolderBase]: 10949/15337 cut-off events. [2024-06-04 15:11:47,526 INFO L125 PetriNetUnfolderBase]: For 35046/35046 co-relation queries the response was YES. [2024-06-04 15:11:47,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48672 conditions, 15337 events. 10949/15337 cut-off events. For 35046/35046 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 85458 event pairs, 6382 based on Foata normal form. 3/15189 useless extension candidates. Maximal degree in co-relation 48651. Up to 14778 conditions per place. [2024-06-04 15:11:47,611 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 72 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2024-06-04 15:11:47,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 93 transitions, 555 flow [2024-06-04 15:11:47,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:11:47,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:11:47,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 15:11:47,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-04 15:11:47,612 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 281 flow. Second operand 6 states and 150 transitions. [2024-06-04 15:11:47,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 93 transitions, 555 flow [2024-06-04 15:11:47,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 522 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 15:11:47,618 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 327 flow [2024-06-04 15:11:47,619 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} [2024-06-04 15:11:47,619 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 11 predicate places. [2024-06-04 15:11:47,619 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 327 flow [2024-06-04 15:11:47,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:47,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:11:47,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:11:47,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 15:11:47,620 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)] === [2024-06-04 15:11:47,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:11:47,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1699293003, now seen corresponding path program 2 times [2024-06-04 15:11:47,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:11:47,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835193249] [2024-06-04 15:11:47,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:11:47,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:11:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:11:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:11:48,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:11:48,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835193249] [2024-06-04 15:11:48,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835193249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:11:48,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:11:48,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:11:48,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122614101] [2024-06-04 15:11:48,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:11:48,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:11:48,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:11:48,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:11:48,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:11:48,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:11:48,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 327 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:48,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:11:48,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:11:48,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:11:50,177 INFO L124 PetriNetUnfolderBase]: 10940/15346 cut-off events. [2024-06-04 15:11:50,177 INFO L125 PetriNetUnfolderBase]: For 47446/47460 co-relation queries the response was YES. [2024-06-04 15:11:50,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52379 conditions, 15346 events. 10940/15346 cut-off events. For 47446/47460 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 85651 event pairs, 6358 based on Foata normal form. 15/15209 useless extension candidates. Maximal degree in co-relation 52357. Up to 14736 conditions per place. [2024-06-04 15:11:50,256 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 66 selfloop transitions, 21 changer transitions 0/94 dead transitions. [2024-06-04 15:11:50,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 94 transitions, 603 flow [2024-06-04 15:11:50,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:11:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:11:50,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 15:11:50,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45987654320987653 [2024-06-04 15:11:50,258 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 327 flow. Second operand 6 states and 149 transitions. [2024-06-04 15:11:50,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 94 transitions, 603 flow [2024-06-04 15:11:50,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 94 transitions, 556 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 15:11:50,266 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 381 flow [2024-06-04 15:11:50,267 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} [2024-06-04 15:11:50,269 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2024-06-04 15:11:50,269 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 381 flow [2024-06-04 15:11:50,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:50,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:11:50,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:11:50,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 15:11:50,270 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)] === [2024-06-04 15:11:50,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:11:50,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1958436867, now seen corresponding path program 1 times [2024-06-04 15:11:50,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:11:50,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146102812] [2024-06-04 15:11:50,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:11:50,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:11:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:11:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:11:51,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:11:51,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146102812] [2024-06-04 15:11:51,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146102812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:11:51,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:11:51,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:11:51,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469840984] [2024-06-04 15:11:51,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:11:51,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:11:51,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:11:51,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:11:51,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:11:51,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:11:51,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 381 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:51,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:11:51,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:11:51,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:11:53,443 INFO L124 PetriNetUnfolderBase]: 11592/16629 cut-off events. [2024-06-04 15:11:53,443 INFO L125 PetriNetUnfolderBase]: For 63025/63025 co-relation queries the response was YES. [2024-06-04 15:11:53,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59193 conditions, 16629 events. 11592/16629 cut-off events. For 63025/63025 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 96122 event pairs, 6613 based on Foata normal form. 3/16451 useless extension candidates. Maximal degree in co-relation 59170. Up to 15642 conditions per place. [2024-06-04 15:11:53,517 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 84 selfloop transitions, 18 changer transitions 0/109 dead transitions. [2024-06-04 15:11:53,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 726 flow [2024-06-04 15:11:53,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:11:53,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:11:53,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 15:11:53,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-04 15:11:53,519 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 381 flow. Second operand 7 states and 170 transitions. [2024-06-04 15:11:53,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 726 flow [2024-06-04 15:11:53,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 109 transitions, 652 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 15:11:53,530 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 430 flow [2024-06-04 15:11:53,530 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=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=430, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-06-04 15:11:53,530 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2024-06-04 15:11:53,530 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 430 flow [2024-06-04 15:11:53,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:53,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:11:53,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:11:53,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 15:11:53,531 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)] === [2024-06-04 15:11:53,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:11:53,532 INFO L85 PathProgramCache]: Analyzing trace with hash 961225523, now seen corresponding path program 1 times [2024-06-04 15:11:53,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:11:53,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489886612] [2024-06-04 15:11:53,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:11:53,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:11:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:11:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:11:54,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:11:54,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489886612] [2024-06-04 15:11:54,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489886612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:11:54,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:11:54,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:11:54,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944623864] [2024-06-04 15:11:54,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:11:54,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:11:54,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:11:54,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:11:54,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:11:54,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:11:54,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 430 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:54,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:11:54,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:11:54,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:11:56,568 INFO L124 PetriNetUnfolderBase]: 13121/18310 cut-off events. [2024-06-04 15:11:56,568 INFO L125 PetriNetUnfolderBase]: For 96078/96094 co-relation queries the response was YES. [2024-06-04 15:11:56,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72006 conditions, 18310 events. 13121/18310 cut-off events. For 96078/96094 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 103603 event pairs, 6437 based on Foata normal form. 6/18130 useless extension candidates. Maximal degree in co-relation 71981. Up to 17624 conditions per place. [2024-06-04 15:11:56,837 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 94 selfloop transitions, 22 changer transitions 0/124 dead transitions. [2024-06-04 15:11:56,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 124 transitions, 822 flow [2024-06-04 15:11:56,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:11:56,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:11:56,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-04 15:11:56,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-04 15:11:56,839 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 430 flow. Second operand 7 states and 178 transitions. [2024-06-04 15:11:56,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 124 transitions, 822 flow [2024-06-04 15:11:56,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 124 transitions, 761 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 15:11:56,853 INFO L231 Difference]: Finished difference. Result has 78 places, 86 transitions, 501 flow [2024-06-04 15:11:56,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=501, PETRI_PLACES=78, PETRI_TRANSITIONS=86} [2024-06-04 15:11:56,854 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 21 predicate places. [2024-06-04 15:11:56,854 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 86 transitions, 501 flow [2024-06-04 15:11:56,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:56,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:11:56,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:11:56,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 15:11:56,855 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)] === [2024-06-04 15:11:56,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:11:56,855 INFO L85 PathProgramCache]: Analyzing trace with hash -588674367, now seen corresponding path program 2 times [2024-06-04 15:11:56,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:11:56,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732902749] [2024-06-04 15:11:56,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:11:56,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:11:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:11:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:11:57,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:11:57,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732902749] [2024-06-04 15:11:57,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732902749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:11:57,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:11:57,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:11:57,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038111866] [2024-06-04 15:11:57,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:11:57,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:11:57,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:11:57,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:11:57,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:11:57,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:11:57,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 86 transitions, 501 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:11:57,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:11:57,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:11:57,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:11:59,837 INFO L124 PetriNetUnfolderBase]: 13277/18522 cut-off events. [2024-06-04 15:11:59,838 INFO L125 PetriNetUnfolderBase]: For 123327/123343 co-relation queries the response was YES. [2024-06-04 15:11:59,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78927 conditions, 18522 events. 13277/18522 cut-off events. For 123327/123343 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 104920 event pairs, 6338 based on Foata normal form. 28/18369 useless extension candidates. Maximal degree in co-relation 78900. Up to 17651 conditions per place. [2024-06-04 15:11:59,970 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 96 selfloop transitions, 32 changer transitions 0/136 dead transitions. [2024-06-04 15:11:59,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 136 transitions, 1041 flow [2024-06-04 15:11:59,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:11:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:11:59,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-04 15:11:59,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-04 15:11:59,972 INFO L175 Difference]: Start difference. First operand has 78 places, 86 transitions, 501 flow. Second operand 7 states and 183 transitions. [2024-06-04 15:11:59,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 136 transitions, 1041 flow [2024-06-04 15:11:59,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 136 transitions, 977 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-04 15:12:00,001 INFO L231 Difference]: Finished difference. Result has 83 places, 96 transitions, 659 flow [2024-06-04 15:12:00,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=659, PETRI_PLACES=83, PETRI_TRANSITIONS=96} [2024-06-04 15:12:00,002 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 26 predicate places. [2024-06-04 15:12:00,002 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 96 transitions, 659 flow [2024-06-04 15:12:00,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:00,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:00,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:00,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 15:12:00,003 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)] === [2024-06-04 15:12:00,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:00,003 INFO L85 PathProgramCache]: Analyzing trace with hash -44599313, now seen corresponding path program 3 times [2024-06-04 15:12:00,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:00,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796231973] [2024-06-04 15:12:00,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:00,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:01,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:01,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796231973] [2024-06-04 15:12:01,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796231973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:01,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:01,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:12:01,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140032499] [2024-06-04 15:12:01,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:01,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:12:01,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:01,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:12:01,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:12:01,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:12:01,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 96 transitions, 659 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:01,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:01,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:12:01,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:03,026 INFO L124 PetriNetUnfolderBase]: 13315/18532 cut-off events. [2024-06-04 15:12:03,026 INFO L125 PetriNetUnfolderBase]: For 156626/156638 co-relation queries the response was YES. [2024-06-04 15:12:03,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85750 conditions, 18532 events. 13315/18532 cut-off events. For 156626/156638 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 104661 event pairs, 5996 based on Foata normal form. 20/18368 useless extension candidates. Maximal degree in co-relation 85721. Up to 17513 conditions per place. [2024-06-04 15:12:03,156 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 88 selfloop transitions, 51 changer transitions 0/147 dead transitions. [2024-06-04 15:12:03,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 147 transitions, 1311 flow [2024-06-04 15:12:03,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:12:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:12:03,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-04 15:12:03,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-06-04 15:12:03,157 INFO L175 Difference]: Start difference. First operand has 83 places, 96 transitions, 659 flow. Second operand 7 states and 188 transitions. [2024-06-04 15:12:03,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 147 transitions, 1311 flow [2024-06-04 15:12:03,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 147 transitions, 1243 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-04 15:12:03,212 INFO L231 Difference]: Finished difference. Result has 88 places, 106 transitions, 868 flow [2024-06-04 15:12:03,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=868, PETRI_PLACES=88, PETRI_TRANSITIONS=106} [2024-06-04 15:12:03,213 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 31 predicate places. [2024-06-04 15:12:03,213 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 106 transitions, 868 flow [2024-06-04 15:12:03,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:03,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:03,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:03,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 15:12:03,214 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)] === [2024-06-04 15:12:03,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:03,214 INFO L85 PathProgramCache]: Analyzing trace with hash -581999013, now seen corresponding path program 1 times [2024-06-04 15:12:03,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:03,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751785161] [2024-06-04 15:12:03,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:03,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:04,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:04,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751785161] [2024-06-04 15:12:04,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751785161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:04,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:04,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:12:04,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899829436] [2024-06-04 15:12:04,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:04,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:12:04,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:04,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:12:04,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:12:04,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:12:04,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 106 transitions, 868 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:04,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:04,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:12:04,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:06,684 INFO L124 PetriNetUnfolderBase]: 11984/16948 cut-off events. [2024-06-04 15:12:06,684 INFO L125 PetriNetUnfolderBase]: For 160581/160581 co-relation queries the response was YES. [2024-06-04 15:12:06,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81353 conditions, 16948 events. 11984/16948 cut-off events. For 160581/160581 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 96534 event pairs, 5320 based on Foata normal form. 6/16812 useless extension candidates. Maximal degree in co-relation 81321. Up to 16149 conditions per place. [2024-06-04 15:12:06,806 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 120 selfloop transitions, 21 changer transitions 0/148 dead transitions. [2024-06-04 15:12:06,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 148 transitions, 1306 flow [2024-06-04 15:12:06,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:12:06,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:12:06,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-04 15:12:06,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44675925925925924 [2024-06-04 15:12:06,808 INFO L175 Difference]: Start difference. First operand has 88 places, 106 transitions, 868 flow. Second operand 8 states and 193 transitions. [2024-06-04 15:12:06,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 148 transitions, 1306 flow [2024-06-04 15:12:06,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 148 transitions, 1157 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-04 15:12:06,892 INFO L231 Difference]: Finished difference. Result has 92 places, 109 transitions, 833 flow [2024-06-04 15:12:06,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=833, PETRI_PLACES=92, PETRI_TRANSITIONS=109} [2024-06-04 15:12:06,893 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 35 predicate places. [2024-06-04 15:12:06,893 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 109 transitions, 833 flow [2024-06-04 15:12:06,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:06,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:06,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:06,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 15:12:06,894 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)] === [2024-06-04 15:12:06,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:06,894 INFO L85 PathProgramCache]: Analyzing trace with hash 73698017, now seen corresponding path program 1 times [2024-06-04 15:12:06,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:06,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361583407] [2024-06-04 15:12:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:06,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:07,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:07,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361583407] [2024-06-04 15:12:07,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361583407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:07,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:07,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:12:07,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514068498] [2024-06-04 15:12:07,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:07,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:12:07,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:07,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:12:07,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:12:07,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:12:07,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 109 transitions, 833 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:07,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:07,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:12:07,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:09,676 INFO L124 PetriNetUnfolderBase]: 11970/17371 cut-off events. [2024-06-04 15:12:09,677 INFO L125 PetriNetUnfolderBase]: For 169457/169457 co-relation queries the response was YES. [2024-06-04 15:12:09,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81276 conditions, 17371 events. 11970/17371 cut-off events. For 169457/169457 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 102819 event pairs, 5402 based on Foata normal form. 4/17342 useless extension candidates. Maximal degree in co-relation 81243. Up to 16188 conditions per place. [2024-06-04 15:12:09,807 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 111 selfloop transitions, 10 changer transitions 0/128 dead transitions. [2024-06-04 15:12:09,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 128 transitions, 1159 flow [2024-06-04 15:12:09,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:12:09,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:12:09,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-04 15:12:09,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44814814814814813 [2024-06-04 15:12:09,808 INFO L175 Difference]: Start difference. First operand has 92 places, 109 transitions, 833 flow. Second operand 5 states and 121 transitions. [2024-06-04 15:12:09,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 128 transitions, 1159 flow [2024-06-04 15:12:09,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 128 transitions, 1075 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 15:12:09,874 INFO L231 Difference]: Finished difference. Result has 91 places, 113 transitions, 832 flow [2024-06-04 15:12:09,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=832, PETRI_PLACES=91, PETRI_TRANSITIONS=113} [2024-06-04 15:12:09,875 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 34 predicate places. [2024-06-04 15:12:09,875 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 113 transitions, 832 flow [2024-06-04 15:12:09,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:09,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:09,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:09,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 15:12:09,876 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)] === [2024-06-04 15:12:09,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:09,876 INFO L85 PathProgramCache]: Analyzing trace with hash 646782562, now seen corresponding path program 1 times [2024-06-04 15:12:09,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:09,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544364048] [2024-06-04 15:12:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:09,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:11,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:11,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544364048] [2024-06-04 15:12:11,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544364048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:11,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:11,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:12:11,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611278976] [2024-06-04 15:12:11,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:11,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:12:11,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:11,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:12:11,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:12:11,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:12:11,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 113 transitions, 832 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:11,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:11,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:12:11,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:13,290 INFO L124 PetriNetUnfolderBase]: 13277/18666 cut-off events. [2024-06-04 15:12:13,291 INFO L125 PetriNetUnfolderBase]: For 226283/226283 co-relation queries the response was YES. [2024-06-04 15:12:13,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95817 conditions, 18666 events. 13277/18666 cut-off events. For 226283/226283 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 107157 event pairs, 5923 based on Foata normal form. 3/18647 useless extension candidates. Maximal degree in co-relation 95783. Up to 17830 conditions per place. [2024-06-04 15:12:13,441 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 122 selfloop transitions, 25 changer transitions 0/155 dead transitions. [2024-06-04 15:12:13,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 155 transitions, 1295 flow [2024-06-04 15:12:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:12:13,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:12:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-04 15:12:13,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-04 15:12:13,443 INFO L175 Difference]: Start difference. First operand has 91 places, 113 transitions, 832 flow. Second operand 7 states and 178 transitions. [2024-06-04 15:12:13,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 155 transitions, 1295 flow [2024-06-04 15:12:13,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 155 transitions, 1242 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-04 15:12:13,519 INFO L231 Difference]: Finished difference. Result has 95 places, 117 transitions, 922 flow [2024-06-04 15:12:13,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=922, PETRI_PLACES=95, PETRI_TRANSITIONS=117} [2024-06-04 15:12:13,520 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-06-04 15:12:13,520 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 117 transitions, 922 flow [2024-06-04 15:12:13,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:13,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:13,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:13,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 15:12:13,521 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)] === [2024-06-04 15:12:13,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:13,521 INFO L85 PathProgramCache]: Analyzing trace with hash 646936384, now seen corresponding path program 1 times [2024-06-04 15:12:13,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:13,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141701618] [2024-06-04 15:12:13,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:13,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:14,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:14,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141701618] [2024-06-04 15:12:14,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141701618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:14,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:14,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:12:14,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679043728] [2024-06-04 15:12:14,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:14,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:12:14,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:14,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:12:14,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:12:14,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-04 15:12:14,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 117 transitions, 922 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) [2024-06-04 15:12:14,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:14,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-04 15:12:14,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:16,922 INFO L124 PetriNetUnfolderBase]: 13605/19031 cut-off events. [2024-06-04 15:12:16,922 INFO L125 PetriNetUnfolderBase]: For 239572/239572 co-relation queries the response was YES. [2024-06-04 15:12:17,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96531 conditions, 19031 events. 13605/19031 cut-off events. For 239572/239572 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 106620 event pairs, 5791 based on Foata normal form. 9/19017 useless extension candidates. Maximal degree in co-relation 96496. Up to 18016 conditions per place. [2024-06-04 15:12:17,087 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 123 selfloop transitions, 48 changer transitions 0/177 dead transitions. [2024-06-04 15:12:17,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 177 transitions, 1532 flow [2024-06-04 15:12:17,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:12:17,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:12:17,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-04 15:12:17,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45601851851851855 [2024-06-04 15:12:17,089 INFO L175 Difference]: Start difference. First operand has 95 places, 117 transitions, 922 flow. Second operand 8 states and 197 transitions. [2024-06-04 15:12:17,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 177 transitions, 1532 flow [2024-06-04 15:12:17,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 177 transitions, 1382 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-04 15:12:17,209 INFO L231 Difference]: Finished difference. Result has 99 places, 132 transitions, 1048 flow [2024-06-04 15:12:17,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1048, PETRI_PLACES=99, PETRI_TRANSITIONS=132} [2024-06-04 15:12:17,209 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 42 predicate places. [2024-06-04 15:12:17,210 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 132 transitions, 1048 flow [2024-06-04 15:12:17,210 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) [2024-06-04 15:12:17,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:17,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:17,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 15:12:17,210 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)] === [2024-06-04 15:12:17,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:17,211 INFO L85 PathProgramCache]: Analyzing trace with hash -869726948, now seen corresponding path program 2 times [2024-06-04 15:12:17,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:17,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687473424] [2024-06-04 15:12:17,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:17,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:18,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:18,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687473424] [2024-06-04 15:12:18,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687473424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:18,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:18,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:12:18,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276588640] [2024-06-04 15:12:18,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:18,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:12:18,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:18,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:12:18,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:12:18,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-04 15:12:18,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 132 transitions, 1048 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) [2024-06-04 15:12:18,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:18,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-04 15:12:18,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:20,689 INFO L124 PetriNetUnfolderBase]: 13649/19094 cut-off events. [2024-06-04 15:12:20,689 INFO L125 PetriNetUnfolderBase]: For 261096/261112 co-relation queries the response was YES. [2024-06-04 15:12:20,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99113 conditions, 19094 events. 13649/19094 cut-off events. For 261096/261112 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 106799 event pairs, 5793 based on Foata normal form. 17/19087 useless extension candidates. Maximal degree in co-relation 99076. Up to 18279 conditions per place. [2024-06-04 15:12:20,830 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 139 selfloop transitions, 35 changer transitions 0/180 dead transitions. [2024-06-04 15:12:20,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 180 transitions, 1598 flow [2024-06-04 15:12:20,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:12:20,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:12:20,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-04 15:12:20,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4398148148148148 [2024-06-04 15:12:20,832 INFO L175 Difference]: Start difference. First operand has 99 places, 132 transitions, 1048 flow. Second operand 8 states and 190 transitions. [2024-06-04 15:12:20,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 180 transitions, 1598 flow [2024-06-04 15:12:20,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 180 transitions, 1522 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 15:12:20,972 INFO L231 Difference]: Finished difference. Result has 104 places, 141 transitions, 1169 flow [2024-06-04 15:12:20,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1169, PETRI_PLACES=104, PETRI_TRANSITIONS=141} [2024-06-04 15:12:20,972 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 47 predicate places. [2024-06-04 15:12:20,973 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 141 transitions, 1169 flow [2024-06-04 15:12:20,973 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) [2024-06-04 15:12:20,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:20,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:20,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 15:12:20,975 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)] === [2024-06-04 15:12:20,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:20,975 INFO L85 PathProgramCache]: Analyzing trace with hash -869517698, now seen corresponding path program 3 times [2024-06-04 15:12:20,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:20,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760247708] [2024-06-04 15:12:20,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:20,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:22,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:22,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760247708] [2024-06-04 15:12:22,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760247708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:22,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:22,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:12:22,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952744644] [2024-06-04 15:12:22,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:22,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:12:22,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:22,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:12:22,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:12:22,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-04 15:12:22,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 141 transitions, 1169 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) [2024-06-04 15:12:22,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:22,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-04 15:12:22,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:24,560 INFO L124 PetriNetUnfolderBase]: 13628/19064 cut-off events. [2024-06-04 15:12:24,561 INFO L125 PetriNetUnfolderBase]: For 284301/284317 co-relation queries the response was YES. [2024-06-04 15:12:24,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101193 conditions, 19064 events. 13628/19064 cut-off events. For 284301/284317 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 106784 event pairs, 5801 based on Foata normal form. 17/19057 useless extension candidates. Maximal degree in co-relation 101153. Up to 18196 conditions per place. [2024-06-04 15:12:24,705 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 139 selfloop transitions, 52 changer transitions 0/197 dead transitions. [2024-06-04 15:12:24,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 197 transitions, 1792 flow [2024-06-04 15:12:24,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:12:24,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:12:24,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-04 15:12:24,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43621399176954734 [2024-06-04 15:12:24,707 INFO L175 Difference]: Start difference. First operand has 104 places, 141 transitions, 1169 flow. Second operand 9 states and 212 transitions. [2024-06-04 15:12:24,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 197 transitions, 1792 flow [2024-06-04 15:12:24,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 197 transitions, 1673 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-04 15:12:24,829 INFO L231 Difference]: Finished difference. Result has 110 places, 152 transitions, 1333 flow [2024-06-04 15:12:24,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1333, PETRI_PLACES=110, PETRI_TRANSITIONS=152} [2024-06-04 15:12:24,830 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 53 predicate places. [2024-06-04 15:12:24,830 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 152 transitions, 1333 flow [2024-06-04 15:12:24,830 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) [2024-06-04 15:12:24,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:24,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:24,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 15:12:24,830 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)] === [2024-06-04 15:12:24,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:24,831 INFO L85 PathProgramCache]: Analyzing trace with hash 2069442650, now seen corresponding path program 1 times [2024-06-04 15:12:24,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:24,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712076435] [2024-06-04 15:12:24,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:24,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:26,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:26,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712076435] [2024-06-04 15:12:26,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712076435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:26,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:26,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:12:26,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720538240] [2024-06-04 15:12:26,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:26,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:12:26,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:26,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:12:26,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:12:26,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:12:26,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 152 transitions, 1333 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:26,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:26,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:12:26,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:28,935 INFO L124 PetriNetUnfolderBase]: 13241/18714 cut-off events. [2024-06-04 15:12:28,935 INFO L125 PetriNetUnfolderBase]: For 309709/309717 co-relation queries the response was YES. [2024-06-04 15:12:29,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102049 conditions, 18714 events. 13241/18714 cut-off events. For 309709/309717 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 107697 event pairs, 5596 based on Foata normal form. 14/18703 useless extension candidates. Maximal degree in co-relation 102006. Up to 17758 conditions per place. [2024-06-04 15:12:29,089 INFO L140 encePairwiseOnDemand]: 39/54 looper letters, 177 selfloop transitions, 43 changer transitions 0/231 dead transitions. [2024-06-04 15:12:29,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 231 transitions, 2167 flow [2024-06-04 15:12:29,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:12:29,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:12:29,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-04 15:12:29,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4670781893004115 [2024-06-04 15:12:29,091 INFO L175 Difference]: Start difference. First operand has 110 places, 152 transitions, 1333 flow. Second operand 9 states and 227 transitions. [2024-06-04 15:12:29,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 231 transitions, 2167 flow [2024-06-04 15:12:29,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 231 transitions, 2058 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-04 15:12:29,936 INFO L231 Difference]: Finished difference. Result has 119 places, 179 transitions, 1622 flow [2024-06-04 15:12:29,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1231, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1622, PETRI_PLACES=119, PETRI_TRANSITIONS=179} [2024-06-04 15:12:29,937 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 62 predicate places. [2024-06-04 15:12:29,937 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 179 transitions, 1622 flow [2024-06-04 15:12:29,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:29,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:29,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:29,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 15:12:29,937 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:12:29,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:29,938 INFO L85 PathProgramCache]: Analyzing trace with hash 316950130, now seen corresponding path program 2 times [2024-06-04 15:12:29,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:29,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634380119] [2024-06-04 15:12:29,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:29,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:31,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:31,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634380119] [2024-06-04 15:12:31,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634380119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:31,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:31,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:12:31,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939219628] [2024-06-04 15:12:31,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:31,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:12:31,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:31,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:12:31,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:12:31,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:12:31,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 179 transitions, 1622 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:31,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:31,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:12:31,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:33,688 INFO L124 PetriNetUnfolderBase]: 13314/18851 cut-off events. [2024-06-04 15:12:33,688 INFO L125 PetriNetUnfolderBase]: For 353102/353118 co-relation queries the response was YES. [2024-06-04 15:12:33,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106988 conditions, 18851 events. 13314/18851 cut-off events. For 353102/353118 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 108561 event pairs, 4631 based on Foata normal form. 22/18816 useless extension candidates. Maximal degree in co-relation 106941. Up to 17772 conditions per place. [2024-06-04 15:12:33,890 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 171 selfloop transitions, 47 changer transitions 0/229 dead transitions. [2024-06-04 15:12:33,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 229 transitions, 2284 flow [2024-06-04 15:12:33,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:12:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:12:33,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-04 15:12:33,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-04 15:12:33,891 INFO L175 Difference]: Start difference. First operand has 119 places, 179 transitions, 1622 flow. Second operand 8 states and 200 transitions. [2024-06-04 15:12:33,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 229 transitions, 2284 flow [2024-06-04 15:12:34,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 229 transitions, 2182 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-04 15:12:34,182 INFO L231 Difference]: Finished difference. Result has 124 places, 182 transitions, 1706 flow [2024-06-04 15:12:34,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1706, PETRI_PLACES=124, PETRI_TRANSITIONS=182} [2024-06-04 15:12:34,182 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 67 predicate places. [2024-06-04 15:12:34,182 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 182 transitions, 1706 flow [2024-06-04 15:12:34,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:34,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:34,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:34,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 15:12:34,183 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)] === [2024-06-04 15:12:34,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:34,183 INFO L85 PathProgramCache]: Analyzing trace with hash 430514290, now seen corresponding path program 3 times [2024-06-04 15:12:34,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:34,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122380024] [2024-06-04 15:12:34,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:34,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:35,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:35,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122380024] [2024-06-04 15:12:35,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122380024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:35,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:35,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:12:35,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542708202] [2024-06-04 15:12:35,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:35,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:12:35,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:35,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:12:35,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:12:35,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:12:35,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 182 transitions, 1706 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:35,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:35,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:12:35,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:38,345 INFO L124 PetriNetUnfolderBase]: 13378/18926 cut-off events. [2024-06-04 15:12:38,346 INFO L125 PetriNetUnfolderBase]: For 395862/395878 co-relation queries the response was YES. [2024-06-04 15:12:38,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111240 conditions, 18926 events. 13378/18926 cut-off events. For 395862/395878 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 109001 event pairs, 5233 based on Foata normal form. 28/18922 useless extension candidates. Maximal degree in co-relation 111192. Up to 17868 conditions per place. [2024-06-04 15:12:38,523 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 169 selfloop transitions, 52 changer transitions 0/232 dead transitions. [2024-06-04 15:12:38,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 232 transitions, 2382 flow [2024-06-04 15:12:38,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:12:38,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:12:38,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-04 15:12:38,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652777777777778 [2024-06-04 15:12:38,525 INFO L175 Difference]: Start difference. First operand has 124 places, 182 transitions, 1706 flow. Second operand 8 states and 201 transitions. [2024-06-04 15:12:38,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 232 transitions, 2382 flow [2024-06-04 15:12:38,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 232 transitions, 2218 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-04 15:12:38,813 INFO L231 Difference]: Finished difference. Result has 126 places, 185 transitions, 1743 flow [2024-06-04 15:12:38,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1743, PETRI_PLACES=126, PETRI_TRANSITIONS=185} [2024-06-04 15:12:38,814 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 69 predicate places. [2024-06-04 15:12:38,814 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 185 transitions, 1743 flow [2024-06-04 15:12:38,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:38,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:38,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:38,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 15:12:38,814 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)] === [2024-06-04 15:12:38,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:38,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1726925598, now seen corresponding path program 4 times [2024-06-04 15:12:38,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:38,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024153492] [2024-06-04 15:12:38,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:38,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:40,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:40,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024153492] [2024-06-04 15:12:40,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024153492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:40,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:40,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:12:40,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832026066] [2024-06-04 15:12:40,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:40,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:12:40,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:40,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:12:40,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:12:40,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:12:40,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 185 transitions, 1743 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:40,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:40,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:12:40,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:43,422 INFO L124 PetriNetUnfolderBase]: 13598/19267 cut-off events. [2024-06-04 15:12:43,423 INFO L125 PetriNetUnfolderBase]: For 411175/411187 co-relation queries the response was YES. [2024-06-04 15:12:43,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113324 conditions, 19267 events. 13598/19267 cut-off events. For 411175/411187 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 111476 event pairs, 5268 based on Foata normal form. 54/19294 useless extension candidates. Maximal degree in co-relation 113275. Up to 17850 conditions per place. [2024-06-04 15:12:43,864 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 151 selfloop transitions, 73 changer transitions 0/235 dead transitions. [2024-06-04 15:12:43,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 235 transitions, 2425 flow [2024-06-04 15:12:43,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:12:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:12:43,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-04 15:12:43,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-04 15:12:43,881 INFO L175 Difference]: Start difference. First operand has 126 places, 185 transitions, 1743 flow. Second operand 8 states and 207 transitions. [2024-06-04 15:12:43,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 235 transitions, 2425 flow [2024-06-04 15:12:44,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 235 transitions, 2262 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 15:12:44,151 INFO L231 Difference]: Finished difference. Result has 128 places, 188 transitions, 1823 flow [2024-06-04 15:12:44,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1580, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1823, PETRI_PLACES=128, PETRI_TRANSITIONS=188} [2024-06-04 15:12:44,151 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 71 predicate places. [2024-06-04 15:12:44,152 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 188 transitions, 1823 flow [2024-06-04 15:12:44,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:44,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:44,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:44,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 15:12:44,152 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)] === [2024-06-04 15:12:44,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:44,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1727110296, now seen corresponding path program 1 times [2024-06-04 15:12:44,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:44,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209024272] [2024-06-04 15:12:44,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:44,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:44,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:45,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:45,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209024272] [2024-06-04 15:12:45,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209024272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:45,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:45,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:12:45,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342299448] [2024-06-04 15:12:45,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:45,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:12:45,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:45,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:12:45,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:12:45,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-04 15:12:45,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 188 transitions, 1823 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) [2024-06-04 15:12:45,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:45,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-04 15:12:45,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:48,513 INFO L124 PetriNetUnfolderBase]: 14268/19944 cut-off events. [2024-06-04 15:12:48,514 INFO L125 PetriNetUnfolderBase]: For 447312/447328 co-relation queries the response was YES. [2024-06-04 15:12:48,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118645 conditions, 19944 events. 14268/19944 cut-off events. For 447312/447328 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 111430 event pairs, 5503 based on Foata normal form. 22/19932 useless extension candidates. Maximal degree in co-relation 118595. Up to 19205 conditions per place. [2024-06-04 15:12:48,659 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 207 selfloop transitions, 29 changer transitions 0/242 dead transitions. [2024-06-04 15:12:48,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 242 transitions, 2537 flow [2024-06-04 15:12:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:12:48,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:12:48,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-04 15:12:48,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43415637860082307 [2024-06-04 15:12:48,660 INFO L175 Difference]: Start difference. First operand has 128 places, 188 transitions, 1823 flow. Second operand 9 states and 211 transitions. [2024-06-04 15:12:48,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 242 transitions, 2537 flow [2024-06-04 15:12:49,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 242 transitions, 2344 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 15:12:49,077 INFO L231 Difference]: Finished difference. Result has 131 places, 191 transitions, 1778 flow [2024-06-04 15:12:49,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1630, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1778, PETRI_PLACES=131, PETRI_TRANSITIONS=191} [2024-06-04 15:12:49,077 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 74 predicate places. [2024-06-04 15:12:49,078 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 191 transitions, 1778 flow [2024-06-04 15:12:49,078 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) [2024-06-04 15:12:49,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:49,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:49,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 15:12:49,078 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:12:49,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:49,078 INFO L85 PathProgramCache]: Analyzing trace with hash 351034658, now seen corresponding path program 1 times [2024-06-04 15:12:49,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:49,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345316339] [2024-06-04 15:12:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:49,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:50,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:50,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345316339] [2024-06-04 15:12:50,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345316339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:50,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:50,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:12:50,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137833293] [2024-06-04 15:12:50,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:50,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:12:50,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:50,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:12:50,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:12:50,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-04 15:12:50,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 191 transitions, 1778 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) [2024-06-04 15:12:50,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:50,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-04 15:12:50,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:53,017 INFO L124 PetriNetUnfolderBase]: 14300/19987 cut-off events. [2024-06-04 15:12:53,017 INFO L125 PetriNetUnfolderBase]: For 480051/480067 co-relation queries the response was YES. [2024-06-04 15:12:53,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120953 conditions, 19987 events. 14300/19987 cut-off events. For 480051/480067 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 111676 event pairs, 5458 based on Foata normal form. 20/19973 useless extension candidates. Maximal degree in co-relation 120902. Up to 19260 conditions per place. [2024-06-04 15:12:53,171 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 199 selfloop transitions, 25 changer transitions 0/230 dead transitions. [2024-06-04 15:12:53,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 230 transitions, 2538 flow [2024-06-04 15:12:53,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:12:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:12:53,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 15:12:53,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2024-06-04 15:12:53,172 INFO L175 Difference]: Start difference. First operand has 131 places, 191 transitions, 1778 flow. Second operand 6 states and 148 transitions. [2024-06-04 15:12:53,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 230 transitions, 2538 flow [2024-06-04 15:12:53,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 230 transitions, 2393 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-04 15:12:53,606 INFO L231 Difference]: Finished difference. Result has 130 places, 199 transitions, 1829 flow [2024-06-04 15:12:53,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1633, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1829, PETRI_PLACES=130, PETRI_TRANSITIONS=199} [2024-06-04 15:12:53,606 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 73 predicate places. [2024-06-04 15:12:53,607 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 199 transitions, 1829 flow [2024-06-04 15:12:53,607 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) [2024-06-04 15:12:53,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:53,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:53,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 15:12:53,607 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:12:53,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:53,607 INFO L85 PathProgramCache]: Analyzing trace with hash 96222102, now seen corresponding path program 2 times [2024-06-04 15:12:53,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:53,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889219677] [2024-06-04 15:12:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:53,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:55,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:55,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889219677] [2024-06-04 15:12:55,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889219677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:55,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:55,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:12:55,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196522572] [2024-06-04 15:12:55,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:55,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:12:55,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:55,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:12:55,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:12:55,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-04 15:12:55,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 199 transitions, 1829 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) [2024-06-04 15:12:55,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:55,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-04 15:12:55,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:58,090 INFO L124 PetriNetUnfolderBase]: 14610/20446 cut-off events. [2024-06-04 15:12:58,090 INFO L125 PetriNetUnfolderBase]: For 541221/541250 co-relation queries the response was YES. [2024-06-04 15:12:58,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127802 conditions, 20446 events. 14610/20446 cut-off events. For 541221/541250 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 114581 event pairs, 5515 based on Foata normal form. 62/20469 useless extension candidates. Maximal degree in co-relation 127750. Up to 18969 conditions per place. [2024-06-04 15:12:58,248 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 170 selfloop transitions, 99 changer transitions 0/275 dead transitions. [2024-06-04 15:12:58,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 275 transitions, 2793 flow [2024-06-04 15:12:58,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:12:58,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:12:58,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-04 15:12:58,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-06-04 15:12:58,251 INFO L175 Difference]: Start difference. First operand has 130 places, 199 transitions, 1829 flow. Second operand 9 states and 228 transitions. [2024-06-04 15:12:58,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 275 transitions, 2793 flow [2024-06-04 15:12:58,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 275 transitions, 2723 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-04 15:12:58,621 INFO L231 Difference]: Finished difference. Result has 139 places, 221 transitions, 2293 flow [2024-06-04 15:12:58,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2293, PETRI_PLACES=139, PETRI_TRANSITIONS=221} [2024-06-04 15:12:58,621 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 82 predicate places. [2024-06-04 15:12:58,621 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 221 transitions, 2293 flow [2024-06-04 15:12:58,621 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) [2024-06-04 15:12:58,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:58,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:58,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 15:12:58,622 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:12:58,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:58,622 INFO L85 PathProgramCache]: Analyzing trace with hash 96452742, now seen corresponding path program 3 times [2024-06-04 15:12:58,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:58,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853770157] [2024-06-04 15:12:58,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:58,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:00,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:00,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853770157] [2024-06-04 15:13:00,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853770157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:00,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:00,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:13:00,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217208596] [2024-06-04 15:13:00,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:00,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:13:00,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:00,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:13:00,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:13:00,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-04 15:13:00,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 221 transitions, 2293 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) [2024-06-04 15:13:00,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:00,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-04 15:13:00,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:03,472 INFO L124 PetriNetUnfolderBase]: 14646/20498 cut-off events. [2024-06-04 15:13:03,472 INFO L125 PetriNetUnfolderBase]: For 628836/628865 co-relation queries the response was YES. [2024-06-04 15:13:03,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134840 conditions, 20498 events. 14646/20498 cut-off events. For 628836/628865 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 114836 event pairs, 5523 based on Foata normal form. 26/20437 useless extension candidates. Maximal degree in co-relation 134784. Up to 19050 conditions per place. [2024-06-04 15:13:03,649 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 148 selfloop transitions, 122 changer transitions 0/276 dead transitions. [2024-06-04 15:13:03,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 276 transitions, 3225 flow [2024-06-04 15:13:03,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:13:03,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:13:03,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-04 15:13:03,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588477366255144 [2024-06-04 15:13:03,651 INFO L175 Difference]: Start difference. First operand has 139 places, 221 transitions, 2293 flow. Second operand 9 states and 223 transitions. [2024-06-04 15:13:03,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 276 transitions, 3225 flow [2024-06-04 15:13:04,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 276 transitions, 3078 flow, removed 57 selfloop flow, removed 2 redundant places. [2024-06-04 15:13:04,110 INFO L231 Difference]: Finished difference. Result has 146 places, 224 transitions, 2496 flow [2024-06-04 15:13:04,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2146, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2496, PETRI_PLACES=146, PETRI_TRANSITIONS=224} [2024-06-04 15:13:04,110 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 89 predicate places. [2024-06-04 15:13:04,111 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 224 transitions, 2496 flow [2024-06-04 15:13:04,111 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) [2024-06-04 15:13:04,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:04,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:04,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 15:13:04,111 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:13:04,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:04,111 INFO L85 PathProgramCache]: Analyzing trace with hash -955257862, now seen corresponding path program 4 times [2024-06-04 15:13:04,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:04,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543304445] [2024-06-04 15:13:04,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:04,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:05,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:05,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543304445] [2024-06-04 15:13:05,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543304445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:05,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:05,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:13:05,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586504578] [2024-06-04 15:13:05,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:05,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:13:05,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:05,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:13:05,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:13:05,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-04 15:13:05,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 224 transitions, 2496 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) [2024-06-04 15:13:05,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:05,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-04 15:13:05,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand