./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix037_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/mix037_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-07_14-17-48.files/protection/mix037_power.oepc_pso.oepc_rmo.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 --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 13:21:39,408 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 13:21:39,463 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 13:21:39,468 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 13:21:39,468 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 13:21:39,491 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 13:21:39,494 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 13:21:39,494 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 13:21:39,495 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 13:21:39,499 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 13:21:39,500 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 13:21:39,500 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 13:21:39,501 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 13:21:39,501 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 13:21:39,502 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 13:21:39,502 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 13:21:39,503 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 13:21:39,503 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 13:21:39,503 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 13:21:39,503 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 13:21:39,505 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 13:21:39,505 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 13:21:39,506 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 13:21:39,506 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 13:21:39,506 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 13:21:39,506 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 13:21:39,507 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 13:21:39,507 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 13:21:39,507 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 13:21:39,508 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 13:21:39,508 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 13:21:39,509 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 13:21:39,509 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:21:39,510 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 13:21:39,510 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 13:21:39,510 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 13:21:39,510 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 13:21:39,510 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 13:21:39,511 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 13:21:39,511 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 13:21:39,511 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 13:21:39,511 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 13:21:39,511 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 13:21:39,512 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 13:21:39,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 13:21:39,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 13:21:39,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 13:21:39,783 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 13:21:39,784 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 13:21:39,785 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix037_power.oepc_pso.oepc_rmo.oepc.i [2024-05-12 13:21:40,808 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 13:21:41,059 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 13:21:41,060 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix037_power.oepc_pso.oepc_rmo.oepc.i [2024-05-12 13:21:41,078 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/babad4f33/4fa8b406b52d42658d15670b310ac60d/FLAG65880e534 [2024-05-12 13:21:41,090 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/babad4f33/4fa8b406b52d42658d15670b310ac60d [2024-05-12 13:21:41,092 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 13:21:41,092 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 13:21:41,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/mix037_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-05-12 13:21:41,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 13:21:41,272 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 13:21:41,273 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 13:21:41,273 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 13:21:41,276 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 13:21:41,277 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:21:41" (1/2) ... [2024-05-12 13:21:41,278 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e25f739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:21:41, skipping insertion in model container [2024-05-12 13:21:41,278 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:21:41" (1/2) ... [2024-05-12 13:21:41,279 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2d687f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:21:41, skipping insertion in model container [2024-05-12 13:21:41,279 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:21:41" (2/2) ... [2024-05-12 13:21:41,280 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e25f739 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:21:41, skipping insertion in model container [2024-05-12 13:21:41,280 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:21:41" (2/2) ... [2024-05-12 13:21:41,280 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 13:21:41,377 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 13:21:41,378 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] (((((((((((((((((((((((! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1))) [2024-05-12 13:21:41,378 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((((((((! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1))) [2024-05-12 13:21:41,379 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] (((((((((((((((((((((((! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1))) [2024-05-12 13:21:41,379 INFO L97 edCorrectnessWitness]: Location invariant before [L879-L879] (((((((((((((((((((((((! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1))) [2024-05-12 13:21:41,379 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 13:21:41,380 INFO L106 edCorrectnessWitness]: ghost_update [L872-L872] multithreaded = 1; [2024-05-12 13:21:41,416 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 13:21:41,552 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix037_power.oepc_pso.oepc_rmo.oepc.i[969,982] [2024-05-12 13:21:41,689 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:21:41,704 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 13:21:41,729 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix037_power.oepc_pso.oepc_rmo.oepc.i[969,982] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 13:21:41,804 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:21:41,857 INFO L206 MainTranslator]: Completed translation [2024-05-12 13:21:41,858 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:21:41 WrapperNode [2024-05-12 13:21:41,858 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 13:21:41,859 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 13:21:41,859 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 13:21:41,859 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 13:21:41,865 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 12.05 01:21:41" (1/1) ... [2024-05-12 13:21:41,879 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 12.05 01:21:41" (1/1) ... [2024-05-12 13:21:41,910 INFO L138 Inliner]: procedures = 177, calls = 71, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 152 [2024-05-12 13:21:41,910 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 13:21:41,911 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 13:21:41,911 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 13:21:41,911 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 13:21:41,919 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:21:41" (1/1) ... [2024-05-12 13:21:41,920 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:21:41" (1/1) ... [2024-05-12 13:21:41,924 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:21:41" (1/1) ... [2024-05-12 13:21:42,022 INFO L175 MemorySlicer]: Split 6 memory accesses to 5 slices as follows [2, 1, 1, 1, 1]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-05-12 13:21:42,023 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:21:41" (1/1) ... [2024-05-12 13:21:42,023 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:21:41" (1/1) ... [2024-05-12 13:21:42,035 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:21:41" (1/1) ... [2024-05-12 13:21:42,037 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:21:41" (1/1) ... [2024-05-12 13:21:42,039 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:21:41" (1/1) ... [2024-05-12 13:21:42,040 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:21:41" (1/1) ... [2024-05-12 13:21:42,043 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 13:21:42,044 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 13:21:42,044 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 13:21:42,044 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 13:21:42,049 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:21:41" (1/1) ... [2024-05-12 13:21:42,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:21:42,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 13:21:42,093 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) [2024-05-12 13:21:42,095 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 [2024-05-12 13:21:42,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 13:21:42,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 13:21:42,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 13:21:42,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 13:21:42,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-05-12 13:21:42,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 13:21:42,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 13:21:42,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 13:21:42,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 13:21:42,122 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 13:21:42,122 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 13:21:42,122 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 13:21:42,122 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 13:21:42,122 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 13:21:42,122 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 13:21:42,122 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-05-12 13:21:42,122 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-05-12 13:21:42,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 13:21:42,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 13:21:42,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 13:21:42,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 13:21:42,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-05-12 13:21:42,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 13:21:42,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 13:21:42,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 13:21:42,125 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 13:21:42,269 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 13:21:42,272 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 13:21:42,584 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 13:21:42,584 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 13:21:42,729 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 13:21:42,729 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 13:21:42,730 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:21:42 BoogieIcfgContainer [2024-05-12 13:21:42,730 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 13:21:42,732 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 13:21:42,733 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 13:21:42,735 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 13:21:42,735 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 01:21:41" (1/4) ... [2024-05-12 13:21:42,736 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646f6298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 01:21:42, skipping insertion in model container [2024-05-12 13:21:42,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:21:41" (2/4) ... [2024-05-12 13:21:42,736 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646f6298 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:21:42, skipping insertion in model container [2024-05-12 13:21:42,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:21:41" (3/4) ... [2024-05-12 13:21:42,736 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646f6298 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:21:42, skipping insertion in model container [2024-05-12 13:21:42,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:21:42" (4/4) ... [2024-05-12 13:21:42,737 INFO L112 eAbstractionObserver]: Analyzing ICFG mix037_power.oepc_pso.oepc_rmo.oepc.i [2024-05-12 13:21:42,751 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 13:21:42,751 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-05-12 13:21:42,752 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 13:21:42,804 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 13:21:42,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 60 transitions, 136 flow [2024-05-12 13:21:42,874 INFO L124 PetriNetUnfolderBase]: 1/56 cut-off events. [2024-05-12 13:21:42,874 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:21:42,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 56 events. 1/56 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 102 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2024-05-12 13:21:42,877 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 60 transitions, 136 flow [2024-05-12 13:21:42,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 56 transitions, 124 flow [2024-05-12 13:21:42,891 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 13:21:42,897 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;@502159cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 13:21:42,898 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-05-12 13:21:42,902 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 13:21:42,902 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 13:21:42,902 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:21:42,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:21:42,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 13:21:42,903 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-05-12 13:21:42,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:21:42,909 INFO L85 PathProgramCache]: Analyzing trace with hash -571572536, now seen corresponding path program 1 times [2024-05-12 13:21:42,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:21:42,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468510066] [2024-05-12 13:21:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:21:42,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:21:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:21:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:21:44,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:21:44,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468510066] [2024-05-12 13:21:44,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468510066] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:21:44,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:21:44,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:21:44,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061306379] [2024-05-12 13:21:44,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:21:44,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:21:44,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:21:44,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:21:44,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:21:44,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 60 [2024-05-12 13:21:44,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 56 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:21:44,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:21:44,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 60 [2024-05-12 13:21:44,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:21:48,057 INFO L124 PetriNetUnfolderBase]: 29158/42831 cut-off events. [2024-05-12 13:21:48,057 INFO L125 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2024-05-12 13:21:48,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81873 conditions, 42831 events. 29158/42831 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 1545. Compared 304822 event pairs, 24316 based on Foata normal form. 1051/41043 useless extension candidates. Maximal degree in co-relation 81857. Up to 38583 conditions per place. [2024-05-12 13:21:48,313 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 55 selfloop transitions, 6 changer transitions 0/74 dead transitions. [2024-05-12 13:21:48,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 74 transitions, 291 flow [2024-05-12 13:21:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:21:48,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:21:48,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 118 transitions. [2024-05-12 13:21:48,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-05-12 13:21:48,324 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 124 flow. Second operand 3 states and 118 transitions. [2024-05-12 13:21:48,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 74 transitions, 291 flow [2024-05-12 13:21:48,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 74 transitions, 284 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 13:21:48,334 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 164 flow [2024-05-12 13:21:48,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2024-05-12 13:21:48,339 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -1 predicate places. [2024-05-12 13:21:48,339 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 164 flow [2024-05-12 13:21:48,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:21:48,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:21:48,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 13:21:48,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 13:21:48,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-05-12 13:21:48,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:21:48,341 INFO L85 PathProgramCache]: Analyzing trace with hash -571571614, now seen corresponding path program 1 times [2024-05-12 13:21:48,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:21:48,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744370595] [2024-05-12 13:21:48,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:21:48,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:21:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:21:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:21:48,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:21:48,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744370595] [2024-05-12 13:21:48,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744370595] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:21:48,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:21:48,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:21:48,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814503102] [2024-05-12 13:21:48,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:21:48,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:21:48,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:21:48,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:21:48,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:21:48,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-05-12 13:21:48,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 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) [2024-05-12 13:21:48,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:21:48,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-05-12 13:21:48,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:21:49,310 INFO L124 PetriNetUnfolderBase]: 5307/9124 cut-off events. [2024-05-12 13:21:49,310 INFO L125 PetriNetUnfolderBase]: For 682/682 co-relation queries the response was YES. [2024-05-12 13:21:49,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17524 conditions, 9124 events. 5307/9124 cut-off events. For 682/682 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 71362 event pairs, 3607 based on Foata normal form. 0/8368 useless extension candidates. Maximal degree in co-relation 17509. Up to 6194 conditions per place. [2024-05-12 13:21:49,358 INFO L140 encePairwiseOnDemand]: 57/60 looper letters, 47 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2024-05-12 13:21:49,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 79 transitions, 303 flow [2024-05-12 13:21:49,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:21:49,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:21:49,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2024-05-12 13:21:49,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2024-05-12 13:21:49,360 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 164 flow. Second operand 3 states and 140 transitions. [2024-05-12 13:21:49,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 79 transitions, 303 flow [2024-05-12 13:21:49,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 79 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 13:21:49,362 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 156 flow [2024-05-12 13:21:49,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2024-05-12 13:21:49,363 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -1 predicate places. [2024-05-12 13:21:49,363 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 156 flow [2024-05-12 13:21:49,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 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) [2024-05-12 13:21:49,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:21:49,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:21:49,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 13:21:49,364 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-05-12 13:21:49,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:21:49,364 INFO L85 PathProgramCache]: Analyzing trace with hash 474670982, now seen corresponding path program 1 times [2024-05-12 13:21:49,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:21:49,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058008090] [2024-05-12 13:21:49,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:21:49,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:21:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:21:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:21:50,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:21:50,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058008090] [2024-05-12 13:21:50,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058008090] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:21:50,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:21:50,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 13:21:50,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139497039] [2024-05-12 13:21:50,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:21:50,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 13:21:50,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:21:50,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 13:21:50,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 13:21:50,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 60 [2024-05-12 13:21:50,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:21:50,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:21:50,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 60 [2024-05-12 13:21:50,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:21:53,329 INFO L124 PetriNetUnfolderBase]: 24803/36075 cut-off events. [2024-05-12 13:21:53,329 INFO L125 PetriNetUnfolderBase]: For 8052/8052 co-relation queries the response was YES. [2024-05-12 13:21:53,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77519 conditions, 36075 events. 24803/36075 cut-off events. For 8052/8052 co-relation queries the response was YES. Maximal size of possible extension queue 1294. Compared 245307 event pairs, 18001 based on Foata normal form. 4/34985 useless extension candidates. Maximal degree in co-relation 77503. Up to 32855 conditions per place. [2024-05-12 13:21:53,509 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 67 selfloop transitions, 10 changer transitions 2/92 dead transitions. [2024-05-12 13:21:53,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 92 transitions, 410 flow [2024-05-12 13:21:53,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 13:21:53,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 13:21:53,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-05-12 13:21:53,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-05-12 13:21:53,511 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 156 flow. Second operand 4 states and 147 transitions. [2024-05-12 13:21:53,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 92 transitions, 410 flow [2024-05-12 13:21:53,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 402 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 13:21:53,516 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 237 flow [2024-05-12 13:21:53,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=237, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2024-05-12 13:21:53,517 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2024-05-12 13:21:53,517 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 237 flow [2024-05-12 13:21:53,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:21:53,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:21:53,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:21:53,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 13:21:53,519 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-05-12 13:21:53,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:21:53,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1829900651, now seen corresponding path program 1 times [2024-05-12 13:21:53,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:21:53,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849575149] [2024-05-12 13:21:53,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:21:53,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:21:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:21:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:21:54,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:21:54,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849575149] [2024-05-12 13:21:54,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849575149] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:21:54,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:21:54,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 13:21:54,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930226632] [2024-05-12 13:21:54,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:21:54,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 13:21:54,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:21:54,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 13:21:54,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 13:21:54,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 60 [2024-05-12 13:21:54,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 237 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:21:54,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:21:54,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 60 [2024-05-12 13:21:54,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:21:57,332 INFO L124 PetriNetUnfolderBase]: 21521/31877 cut-off events. [2024-05-12 13:21:57,332 INFO L125 PetriNetUnfolderBase]: For 14969/14969 co-relation queries the response was YES. [2024-05-12 13:21:57,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74350 conditions, 31877 events. 21521/31877 cut-off events. For 14969/14969 co-relation queries the response was YES. Maximal size of possible extension queue 1198. Compared 220392 event pairs, 12425 based on Foata normal form. 10/30990 useless extension candidates. Maximal degree in co-relation 74332. Up to 28358 conditions per place. [2024-05-12 13:21:57,559 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 90 selfloop transitions, 23 changer transitions 0/126 dead transitions. [2024-05-12 13:21:57,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 126 transitions, 663 flow [2024-05-12 13:21:57,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:21:57,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:21:57,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 191 transitions. [2024-05-12 13:21:57,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366666666666667 [2024-05-12 13:21:57,564 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 237 flow. Second operand 5 states and 191 transitions. [2024-05-12 13:21:57,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 126 transitions, 663 flow [2024-05-12 13:21:57,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 126 transitions, 648 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-05-12 13:21:57,570 INFO L231 Difference]: Finished difference. Result has 75 places, 81 transitions, 386 flow [2024-05-12 13:21:57,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=386, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2024-05-12 13:21:57,571 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 7 predicate places. [2024-05-12 13:21:57,572 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 386 flow [2024-05-12 13:21:57,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:21:57,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:21:57,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:21:57,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 13:21:57,572 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-05-12 13:21:57,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:21:57,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1668105101, now seen corresponding path program 1 times [2024-05-12 13:21:57,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:21:57,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339144326] [2024-05-12 13:21:57,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:21:57,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:21:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:21:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:21:58,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:21:58,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339144326] [2024-05-12 13:21:58,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339144326] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:21:58,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:21:58,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:21:58,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964127839] [2024-05-12 13:21:58,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:21:58,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:21:58,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:21:58,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:21:58,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:21:59,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 60 [2024-05-12 13:21:59,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 386 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:21:59,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:21:59,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 60 [2024-05-12 13:21:59,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:22:02,030 INFO L124 PetriNetUnfolderBase]: 21598/31936 cut-off events. [2024-05-12 13:22:02,034 INFO L125 PetriNetUnfolderBase]: For 36919/36919 co-relation queries the response was YES. [2024-05-12 13:22:02,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87353 conditions, 31936 events. 21598/31936 cut-off events. For 36919/36919 co-relation queries the response was YES. Maximal size of possible extension queue 1195. Compared 219550 event pairs, 11076 based on Foata normal form. 10/31050 useless extension candidates. Maximal degree in co-relation 87331. Up to 28372 conditions per place. [2024-05-12 13:22:02,261 INFO L140 encePairwiseOnDemand]: 45/60 looper letters, 104 selfloop transitions, 28 changer transitions 0/145 dead transitions. [2024-05-12 13:22:02,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 145 transitions, 876 flow [2024-05-12 13:22:02,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:22:02,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:22:02,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 227 transitions. [2024-05-12 13:22:02,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-05-12 13:22:02,263 INFO L175 Difference]: Start difference. First operand has 75 places, 81 transitions, 386 flow. Second operand 6 states and 227 transitions. [2024-05-12 13:22:02,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 145 transitions, 876 flow [2024-05-12 13:22:02,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 145 transitions, 864 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-05-12 13:22:02,276 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 484 flow [2024-05-12 13:22:02,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=484, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-05-12 13:22:02,278 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 13 predicate places. [2024-05-12 13:22:02,279 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 484 flow [2024-05-12 13:22:02,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:22:02,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:22:02,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:22:02,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 13:22:02,279 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-05-12 13:22:02,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:22:02,280 INFO L85 PathProgramCache]: Analyzing trace with hash 171652738, now seen corresponding path program 1 times [2024-05-12 13:22:02,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:22:02,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931406469] [2024-05-12 13:22:02,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:22:02,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:22:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:22:03,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:22:03,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:22:03,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931406469] [2024-05-12 13:22:03,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931406469] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:22:03,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:22:03,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:22:03,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380429118] [2024-05-12 13:22:03,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:22:03,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:22:03,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:22:03,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:22:03,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:22:03,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 60 [2024-05-12 13:22:03,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 484 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:22:03,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:22:03,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 60 [2024-05-12 13:22:03,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:22:07,232 INFO L124 PetriNetUnfolderBase]: 21962/32464 cut-off events. [2024-05-12 13:22:07,232 INFO L125 PetriNetUnfolderBase]: For 57913/57913 co-relation queries the response was YES. [2024-05-12 13:22:07,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97152 conditions, 32464 events. 21962/32464 cut-off events. For 57913/57913 co-relation queries the response was YES. Maximal size of possible extension queue 1198. Compared 223637 event pairs, 9439 based on Foata normal form. 44/31614 useless extension candidates. Maximal degree in co-relation 97127. Up to 28446 conditions per place. [2024-05-12 13:22:07,459 INFO L140 encePairwiseOnDemand]: 45/60 looper letters, 119 selfloop transitions, 31 changer transitions 0/163 dead transitions. [2024-05-12 13:22:07,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 163 transitions, 1062 flow [2024-05-12 13:22:07,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:22:07,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:22:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 262 transitions. [2024-05-12 13:22:07,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6238095238095238 [2024-05-12 13:22:07,461 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 484 flow. Second operand 7 states and 262 transitions. [2024-05-12 13:22:07,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 163 transitions, 1062 flow [2024-05-12 13:22:07,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 163 transitions, 992 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-05-12 13:22:07,484 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 514 flow [2024-05-12 13:22:07,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=514, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2024-05-12 13:22:07,487 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 15 predicate places. [2024-05-12 13:22:07,487 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 514 flow [2024-05-12 13:22:07,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:22:07,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:22:07,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:22:07,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 13:22:07,487 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-05-12 13:22:07,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:22:07,488 INFO L85 PathProgramCache]: Analyzing trace with hash 428387980, now seen corresponding path program 1 times [2024-05-12 13:22:07,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:22:07,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330141929] [2024-05-12 13:22:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:22:07,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:22:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:22:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:22:08,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:22:08,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330141929] [2024-05-12 13:22:08,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330141929] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:22:08,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:22:08,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:22:08,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458492392] [2024-05-12 13:22:08,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:22:08,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:22:08,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:22:08,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:22:08,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:22:08,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 60 [2024-05-12 13:22:08,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 514 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:22:08,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:22:08,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 60 [2024-05-12 13:22:08,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:22:12,132 INFO L124 PetriNetUnfolderBase]: 25463/37793 cut-off events. [2024-05-12 13:22:12,133 INFO L125 PetriNetUnfolderBase]: For 87371/87371 co-relation queries the response was YES. [2024-05-12 13:22:12,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116764 conditions, 37793 events. 25463/37793 cut-off events. For 87371/87371 co-relation queries the response was YES. Maximal size of possible extension queue 1319. Compared 265416 event pairs, 12792 based on Foata normal form. 6/36882 useless extension candidates. Maximal degree in co-relation 116738. Up to 33751 conditions per place. [2024-05-12 13:22:12,353 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 88 selfloop transitions, 17 changer transitions 0/117 dead transitions. [2024-05-12 13:22:12,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 117 transitions, 826 flow [2024-05-12 13:22:12,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:22:12,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:22:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-05-12 13:22:12,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5233333333333333 [2024-05-12 13:22:12,355 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 514 flow. Second operand 5 states and 157 transitions. [2024-05-12 13:22:12,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 117 transitions, 826 flow [2024-05-12 13:22:12,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 117 transitions, 752 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-05-12 13:22:12,402 INFO L231 Difference]: Finished difference. Result has 83 places, 92 transitions, 533 flow [2024-05-12 13:22:12,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=533, PETRI_PLACES=83, PETRI_TRANSITIONS=92} [2024-05-12 13:22:12,403 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 15 predicate places. [2024-05-12 13:22:12,404 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 92 transitions, 533 flow [2024-05-12 13:22:12,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:22:12,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:22:12,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:22:12,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 13:22:12,404 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-05-12 13:22:12,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:22:12,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1772670222, now seen corresponding path program 1 times [2024-05-12 13:22:12,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:22:12,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694057886] [2024-05-12 13:22:12,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:22:12,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:22:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:22:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:22:13,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:22:13,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694057886] [2024-05-12 13:22:13,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694057886] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:22:13,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:22:13,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:22:13,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764176644] [2024-05-12 13:22:13,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:22:13,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:22:13,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:22:13,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:22:13,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:22:13,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 60 [2024-05-12 13:22:13,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 92 transitions, 533 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:22:13,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:22:13,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 60 [2024-05-12 13:22:13,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:22:17,240 INFO L124 PetriNetUnfolderBase]: 25521/37365 cut-off events. [2024-05-12 13:22:17,240 INFO L125 PetriNetUnfolderBase]: For 108932/108932 co-relation queries the response was YES. [2024-05-12 13:22:17,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122111 conditions, 37365 events. 25521/37365 cut-off events. For 108932/108932 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 254362 event pairs, 11322 based on Foata normal form. 12/36457 useless extension candidates. Maximal degree in co-relation 122083. Up to 33564 conditions per place. [2024-05-12 13:22:17,489 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 99 selfloop transitions, 27 changer transitions 0/138 dead transitions. [2024-05-12 13:22:17,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 138 transitions, 964 flow [2024-05-12 13:22:17,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:22:17,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:22:17,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-05-12 13:22:17,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-05-12 13:22:17,490 INFO L175 Difference]: Start difference. First operand has 83 places, 92 transitions, 533 flow. Second operand 6 states and 198 transitions. [2024-05-12 13:22:17,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 138 transitions, 964 flow [2024-05-12 13:22:17,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 138 transitions, 913 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-05-12 13:22:17,523 INFO L231 Difference]: Finished difference. Result has 86 places, 96 transitions, 582 flow [2024-05-12 13:22:17,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=582, PETRI_PLACES=86, PETRI_TRANSITIONS=96} [2024-05-12 13:22:17,524 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 18 predicate places. [2024-05-12 13:22:17,524 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 96 transitions, 582 flow [2024-05-12 13:22:17,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:22:17,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:22:17,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:22:17,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 13:22:17,525 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-05-12 13:22:17,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:22:17,525 INFO L85 PathProgramCache]: Analyzing trace with hash -635724456, now seen corresponding path program 2 times [2024-05-12 13:22:17,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:22:17,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104006618] [2024-05-12 13:22:17,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:22:17,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:22:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:22:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:22:18,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:22:18,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104006618] [2024-05-12 13:22:18,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104006618] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:22:18,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:22:18,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:22:18,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262970228] [2024-05-12 13:22:18,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:22:18,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:22:18,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:22:18,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:22:18,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:22:18,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 60 [2024-05-12 13:22:18,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 96 transitions, 582 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:22:18,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:22:18,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 60 [2024-05-12 13:22:18,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:22:22,617 INFO L124 PetriNetUnfolderBase]: 25431/37719 cut-off events. [2024-05-12 13:22:22,617 INFO L125 PetriNetUnfolderBase]: For 118146/118146 co-relation queries the response was YES. [2024-05-12 13:22:22,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123525 conditions, 37719 events. 25431/37719 cut-off events. For 118146/118146 co-relation queries the response was YES. Maximal size of possible extension queue 1319. Compared 264054 event pairs, 12766 based on Foata normal form. 6/36804 useless extension candidates. Maximal degree in co-relation 123496. Up to 33668 conditions per place. [2024-05-12 13:22:22,874 INFO L140 encePairwiseOnDemand]: 47/60 looper letters, 101 selfloop transitions, 16 changer transitions 0/129 dead transitions. [2024-05-12 13:22:22,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 129 transitions, 902 flow [2024-05-12 13:22:22,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:22:22,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:22:22,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-05-12 13:22:22,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-05-12 13:22:22,876 INFO L175 Difference]: Start difference. First operand has 86 places, 96 transitions, 582 flow. Second operand 6 states and 186 transitions. [2024-05-12 13:22:22,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 129 transitions, 902 flow [2024-05-12 13:22:22,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 129 transitions, 855 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-05-12 13:22:22,919 INFO L231 Difference]: Finished difference. Result has 89 places, 96 transitions, 578 flow [2024-05-12 13:22:22,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=578, PETRI_PLACES=89, PETRI_TRANSITIONS=96} [2024-05-12 13:22:22,919 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 21 predicate places. [2024-05-12 13:22:22,919 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 96 transitions, 578 flow [2024-05-12 13:22:22,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:22:22,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:22:22,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:22:22,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 13:22:22,920 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-05-12 13:22:22,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:22:22,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1288616076, now seen corresponding path program 1 times [2024-05-12 13:22:22,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:22:22,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138756146] [2024-05-12 13:22:22,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:22:22,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:22:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:22:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:22:24,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:22:24,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138756146] [2024-05-12 13:22:24,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138756146] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:22:24,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:22:24,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:22:24,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523447791] [2024-05-12 13:22:24,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:22:24,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:22:24,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:22:24,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:22:24,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:22:24,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 60 [2024-05-12 13:22:24,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 96 transitions, 578 flow. Second operand has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:22:24,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:22:24,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 60 [2024-05-12 13:22:24,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand