./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix005.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix005.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/mix005.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix005.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 02:53:31,441 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 02:53:31,527 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 02:53:31,536 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 02:53:31,536 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 02:53:31,572 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 02:53:31,572 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 02:53:31,573 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 02:53:31,573 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 02:53:31,573 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 02:53:31,573 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 02:53:31,574 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 02:53:31,574 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 02:53:31,574 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 02:53:31,574 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 02:53:31,575 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 02:53:31,575 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 02:53:31,575 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 02:53:31,575 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 02:53:31,576 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 02:53:31,576 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 02:53:31,579 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 02:53:31,580 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 02:53:31,580 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 02:53:31,584 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 02:53:31,584 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 02:53:31,584 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 02:53:31,585 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 02:53:31,585 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 02:53:31,585 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 02:53:31,585 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 02:53:31,585 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 02:53:31,585 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:53:31,586 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 02:53:31,586 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 02:53:31,586 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 02:53:31,586 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 02:53:31,586 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 02:53:31,586 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 02:53:31,586 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 02:53:31,586 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 02:53:31,588 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 02:53:31,588 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 02:53:31,588 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 02:53:31,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 02:53:31,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 02:53:31,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 02:53:31,821 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 02:53:31,822 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 02:53:31,823 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix005.opt.yml/witness.yml [2024-06-28 02:53:32,029 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 02:53:32,030 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 02:53:32,030 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix005.opt.i [2024-06-28 02:53:33,158 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 02:53:33,352 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 02:53:33,353 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix005.opt.i [2024-06-28 02:53:33,390 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7de27bf4d/7e5364e80c314552bfd8b7cbabd41e88/FLAG3d609a1f6 [2024-06-28 02:53:33,402 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7de27bf4d/7e5364e80c314552bfd8b7cbabd41e88 [2024-06-28 02:53:33,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 02:53:33,403 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 02:53:33,405 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 02:53:33,405 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 02:53:33,410 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 02:53:33,410 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:53:32" (1/2) ... [2024-06-28 02:53:33,411 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bb6a19 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:53:33, skipping insertion in model container [2024-06-28 02:53:33,411 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:53:32" (1/2) ... [2024-06-28 02:53:33,413 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2e2a1020 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:53:33, skipping insertion in model container [2024-06-28 02:53:33,413 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:53:33" (2/2) ... [2024-06-28 02:53:33,413 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bb6a19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:53:33, skipping insertion in model container [2024-06-28 02:53:33,413 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:53:33" (2/2) ... [2024-06-28 02:53:33,413 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 02:53:33,540 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 02:53:33,542 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] (((((((((((((((((((((((! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-28 02:53:33,542 INFO L97 edCorrectnessWitness]: Location invariant before [L877-L877] (((((((((((((((((((((((! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-28 02:53:33,542 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] (((((((((((((((((((((((! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-28 02:53:33,543 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((((((((! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-28 02:53:33,543 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 02:53:33,544 INFO L106 edCorrectnessWitness]: ghost_update [L870-L870] multithreaded = 1; [2024-06-28 02:53:33,582 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 02:53:33,875 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:53:33,895 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 02:53:34,035 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:53:34,074 INFO L206 MainTranslator]: Completed translation [2024-06-28 02:53:34,075 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:53:34 WrapperNode [2024-06-28 02:53:34,075 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 02:53:34,076 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 02:53:34,076 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 02:53:34,076 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 02:53:34,082 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:53:34" (1/1) ... [2024-06-28 02:53:34,099 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:53:34" (1/1) ... [2024-06-28 02:53:34,128 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 162 [2024-06-28 02:53:34,129 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 02:53:34,129 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 02:53:34,129 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 02:53:34,130 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 02:53:34,138 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:53:34" (1/1) ... [2024-06-28 02:53:34,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:53:34" (1/1) ... [2024-06-28 02:53:34,141 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:53:34" (1/1) ... [2024-06-28 02:53:34,168 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-28 02:53:34,170 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:53:34" (1/1) ... [2024-06-28 02:53:34,183 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:53:34" (1/1) ... [2024-06-28 02:53:34,192 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:53:34" (1/1) ... [2024-06-28 02:53:34,194 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:53:34" (1/1) ... [2024-06-28 02:53:34,196 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:53:34" (1/1) ... [2024-06-28 02:53:34,198 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:53:34" (1/1) ... [2024-06-28 02:53:34,201 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 02:53:34,202 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 02:53:34,202 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 02:53:34,202 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 02:53:34,203 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:53:34" (1/1) ... [2024-06-28 02:53:34,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:53:34,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 02:53:34,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 02:53:34,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 02:53:34,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 02:53:34,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 02:53:34,293 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 02:53:34,293 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 02:53:34,293 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 02:53:34,293 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 02:53:34,293 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 02:53:34,293 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 02:53:34,293 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-28 02:53:34,294 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-28 02:53:34,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 02:53:34,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 02:53:34,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 02:53:34,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 02:53:34,295 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 02:53:34,398 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 02:53:34,400 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 02:53:34,759 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 02:53:34,759 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 02:53:34,912 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 02:53:34,915 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 02:53:34,916 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:53:34 BoogieIcfgContainer [2024-06-28 02:53:34,916 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 02:53:34,919 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 02:53:34,920 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 02:53:34,922 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 02:53:34,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:53:32" (1/4) ... [2024-06-28 02:53:34,923 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728fbf2a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:53:34, skipping insertion in model container [2024-06-28 02:53:34,923 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 02:53:33" (2/4) ... [2024-06-28 02:53:34,923 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728fbf2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:53:34, skipping insertion in model container [2024-06-28 02:53:34,924 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:53:34" (3/4) ... [2024-06-28 02:53:34,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728fbf2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:53:34, skipping insertion in model container [2024-06-28 02:53:34,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:53:34" (4/4) ... [2024-06-28 02:53:34,930 INFO L112 eAbstractionObserver]: Analyzing ICFG mix005.opt.i [2024-06-28 02:53:34,947 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 02:53:34,947 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 02:53:34,947 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 02:53:34,989 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 02:53:35,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-28 02:53:35,035 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-28 02:53:35,035 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:53:35,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 02:53:35,038 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-28 02:53:35,040 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-28 02:53:35,047 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 02:53:35,079 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;@1da8e5d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 02:53:35,079 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-28 02:53:35,100 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 02:53:35,100 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 02:53:35,100 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:53:35,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:53:35,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 02:53:35,101 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:53:35,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:53:35,106 INFO L85 PathProgramCache]: Analyzing trace with hash 422091523, now seen corresponding path program 1 times [2024-06-28 02:53:35,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:53:35,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155025941] [2024-06-28 02:53:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:53:35,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:53:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:53:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:53:36,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:53:36,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155025941] [2024-06-28 02:53:36,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155025941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:53:36,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:53:36,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 02:53:36,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984825456] [2024-06-28 02:53:36,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:53:36,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 02:53:36,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:53:36,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 02:53:36,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 02:53:36,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-06-28 02:53:36,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:36,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:53:36,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-06-28 02:53:36,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:53:37,392 INFO L124 PetriNetUnfolderBase]: 6201/8888 cut-off events. [2024-06-28 02:53:37,392 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-06-28 02:53:37,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17644 conditions, 8888 events. 6201/8888 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 51115 event pairs, 4673 based on Foata normal form. 1/8581 useless extension candidates. Maximal degree in co-relation 17631. Up to 8487 conditions per place. [2024-06-28 02:53:37,446 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 41 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-28 02:53:37,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 227 flow [2024-06-28 02:53:37,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 02:53:37,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 02:53:37,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-06-28 02:53:37,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6540880503144654 [2024-06-28 02:53:37,458 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 104 transitions. [2024-06-28 02:53:37,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 227 flow [2024-06-28 02:53:37,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 02:53:37,466 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-28 02:53:37,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-28 02:53:37,470 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-28 02:53:37,470 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-28 02:53:37,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:37,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:53:37,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:53:37,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 02:53:37,472 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:53:37,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:53:37,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1904208308, now seen corresponding path program 1 times [2024-06-28 02:53:37,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:53:37,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809273180] [2024-06-28 02:53:37,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:53:37,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:53:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:53:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:53:38,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:53:38,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809273180] [2024-06-28 02:53:38,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809273180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:53:38,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:53:38,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 02:53:38,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776497827] [2024-06-28 02:53:38,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:53:38,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:53:38,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:53:38,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:53:38,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:53:38,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-28 02:53:38,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:38,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:53:38,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-28 02:53:38,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:53:39,228 INFO L124 PetriNetUnfolderBase]: 7096/9935 cut-off events. [2024-06-28 02:53:39,229 INFO L125 PetriNetUnfolderBase]: For 2104/2104 co-relation queries the response was YES. [2024-06-28 02:53:39,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22673 conditions, 9935 events. 7096/9935 cut-off events. For 2104/2104 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 55696 event pairs, 4749 based on Foata normal form. 4/9882 useless extension candidates. Maximal degree in co-relation 22661. Up to 9657 conditions per place. [2024-06-28 02:53:39,289 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 52 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-28 02:53:39,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 321 flow [2024-06-28 02:53:39,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:53:39,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:53:39,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-06-28 02:53:39,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273584905660378 [2024-06-28 02:53:39,293 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 133 transitions. [2024-06-28 02:53:39,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 321 flow [2024-06-28 02:53:39,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 02:53:39,296 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-28 02:53:39,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-28 02:53:39,297 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-28 02:53:39,298 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-28 02:53:39,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:39,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:53:39,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:53:39,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 02:53:39,300 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:53:39,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:53:39,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1099082780, now seen corresponding path program 1 times [2024-06-28 02:53:39,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:53:39,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089486876] [2024-06-28 02:53:39,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:53:39,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:53:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:53:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:53:40,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:53:40,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089486876] [2024-06-28 02:53:40,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089486876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:53:40,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:53:40,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:53:40,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970572253] [2024-06-28 02:53:40,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:53:40,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:53:40,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:53:40,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:53:40,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:53:40,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-28 02:53:40,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:40,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:53:40,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-28 02:53:40,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:53:41,268 INFO L124 PetriNetUnfolderBase]: 7114/10045 cut-off events. [2024-06-28 02:53:41,268 INFO L125 PetriNetUnfolderBase]: For 6000/6000 co-relation queries the response was YES. [2024-06-28 02:53:41,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25591 conditions, 10045 events. 7114/10045 cut-off events. For 6000/6000 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 56965 event pairs, 3563 based on Foata normal form. 7/10029 useless extension candidates. Maximal degree in co-relation 25577. Up to 9578 conditions per place. [2024-06-28 02:53:41,314 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 70 selfloop transitions, 21 changer transitions 0/101 dead transitions. [2024-06-28 02:53:41,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 537 flow [2024-06-28 02:53:41,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:53:41,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:53:41,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2024-06-28 02:53:41,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6566037735849056 [2024-06-28 02:53:41,316 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 5 states and 174 transitions. [2024-06-28 02:53:41,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 537 flow [2024-06-28 02:53:41,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 518 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-28 02:53:41,319 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 312 flow [2024-06-28 02:53:41,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-28 02:53:41,320 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-28 02:53:41,320 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 312 flow [2024-06-28 02:53:41,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:41,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:53:41,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:53:41,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 02:53:41,321 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:53:41,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:53:41,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1207094069, now seen corresponding path program 1 times [2024-06-28 02:53:41,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:53:41,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832944722] [2024-06-28 02:53:41,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:53:41,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:53:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:53:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:53:42,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:53:42,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832944722] [2024-06-28 02:53:42,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832944722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:53:42,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:53:42,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:53:42,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394076156] [2024-06-28 02:53:42,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:53:42,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:53:42,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:53:42,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:53:42,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:53:42,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-28 02:53:42,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:42,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:53:42,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-28 02:53:42,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:53:43,168 INFO L124 PetriNetUnfolderBase]: 7256/10263 cut-off events. [2024-06-28 02:53:43,168 INFO L125 PetriNetUnfolderBase]: For 14577/14596 co-relation queries the response was YES. [2024-06-28 02:53:43,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30873 conditions, 10263 events. 7256/10263 cut-off events. For 14577/14596 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 58470 event pairs, 2792 based on Foata normal form. 48/10286 useless extension candidates. Maximal degree in co-relation 30856. Up to 9570 conditions per place. [2024-06-28 02:53:43,221 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 80 selfloop transitions, 24 changer transitions 0/114 dead transitions. [2024-06-28 02:53:43,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 114 transitions, 692 flow [2024-06-28 02:53:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:53:43,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:53:43,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 204 transitions. [2024-06-28 02:53:43,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6415094339622641 [2024-06-28 02:53:43,223 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 312 flow. Second operand 6 states and 204 transitions. [2024-06-28 02:53:43,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 114 transitions, 692 flow [2024-06-28 02:53:43,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 114 transitions, 680 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-28 02:53:43,229 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 381 flow [2024-06-28 02:53:43,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-28 02:53:43,230 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-06-28 02:53:43,230 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 381 flow [2024-06-28 02:53:43,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:43,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:53:43,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:53:43,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 02:53:43,231 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:53:43,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:53:43,231 INFO L85 PathProgramCache]: Analyzing trace with hash 174290, now seen corresponding path program 1 times [2024-06-28 02:53:43,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:53:43,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703843403] [2024-06-28 02:53:43,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:53:43,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:53:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:53:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:53:43,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:53:43,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703843403] [2024-06-28 02:53:43,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703843403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:53:43,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:53:43,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:53:43,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486993910] [2024-06-28 02:53:43,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:53:43,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:53:43,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:53:43,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:53:43,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:53:43,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-28 02:53:43,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 381 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:43,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:53:43,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-28 02:53:43,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:53:45,127 INFO L124 PetriNetUnfolderBase]: 6342/9216 cut-off events. [2024-06-28 02:53:45,128 INFO L125 PetriNetUnfolderBase]: For 18341/18363 co-relation queries the response was YES. [2024-06-28 02:53:45,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29725 conditions, 9216 events. 6342/9216 cut-off events. For 18341/18363 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 54154 event pairs, 2937 based on Foata normal form. 3/9081 useless extension candidates. Maximal degree in co-relation 29704. Up to 8693 conditions per place. [2024-06-28 02:53:45,196 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 64 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-06-28 02:53:45,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 573 flow [2024-06-28 02:53:45,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:53:45,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:53:45,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-28 02:53:45,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-28 02:53:45,197 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 381 flow. Second operand 5 states and 140 transitions. [2024-06-28 02:53:45,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 573 flow [2024-06-28 02:53:45,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 512 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 02:53:45,205 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 351 flow [2024-06-28 02:53:45,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-06-28 02:53:45,206 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-28 02:53:45,206 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 351 flow [2024-06-28 02:53:45,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:45,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:53:45,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:53:45,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 02:53:45,207 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:53:45,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:53:45,208 INFO L85 PathProgramCache]: Analyzing trace with hash -348909597, now seen corresponding path program 1 times [2024-06-28 02:53:45,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:53:45,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314542106] [2024-06-28 02:53:45,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:53:45,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:53:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:53:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:53:46,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:53:46,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314542106] [2024-06-28 02:53:46,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314542106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:53:46,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:53:46,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:53:46,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311740552] [2024-06-28 02:53:46,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:53:46,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:53:46,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:53:46,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:53:46,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:53:46,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-28 02:53:46,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 351 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:46,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:53:46,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-28 02:53:46,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:53:47,374 INFO L124 PetriNetUnfolderBase]: 7260/10261 cut-off events. [2024-06-28 02:53:47,375 INFO L125 PetriNetUnfolderBase]: For 24753/24773 co-relation queries the response was YES. [2024-06-28 02:53:47,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33716 conditions, 10261 events. 7260/10261 cut-off events. For 24753/24773 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 58508 event pairs, 3413 based on Foata normal form. 24/10266 useless extension candidates. Maximal degree in co-relation 33693. Up to 9800 conditions per place. [2024-06-28 02:53:47,436 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 67 selfloop transitions, 25 changer transitions 0/101 dead transitions. [2024-06-28 02:53:47,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 101 transitions, 672 flow [2024-06-28 02:53:47,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:53:47,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:53:47,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-28 02:53:47,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408805031446541 [2024-06-28 02:53:47,437 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 351 flow. Second operand 6 states and 172 transitions. [2024-06-28 02:53:47,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 101 transitions, 672 flow [2024-06-28 02:53:47,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 643 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 02:53:47,446 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 418 flow [2024-06-28 02:53:47,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-06-28 02:53:47,447 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-28 02:53:47,447 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 418 flow [2024-06-28 02:53:47,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:47,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:53:47,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:53:47,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 02:53:47,447 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:53:47,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:53:47,448 INFO L85 PathProgramCache]: Analyzing trace with hash 167551729, now seen corresponding path program 2 times [2024-06-28 02:53:47,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:53:47,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337838123] [2024-06-28 02:53:47,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:53:47,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:53:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:53:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:53:48,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:53:48,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337838123] [2024-06-28 02:53:48,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337838123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:53:48,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:53:48,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:53:48,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347765234] [2024-06-28 02:53:48,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:53:48,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:53:48,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:53:48,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:53:48,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:53:48,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-28 02:53:48,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:48,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:53:48,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-28 02:53:48,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:53:49,438 INFO L124 PetriNetUnfolderBase]: 7215/10188 cut-off events. [2024-06-28 02:53:49,439 INFO L125 PetriNetUnfolderBase]: For 29326/29348 co-relation queries the response was YES. [2024-06-28 02:53:49,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34402 conditions, 10188 events. 7215/10188 cut-off events. For 29326/29348 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 57813 event pairs, 3427 based on Foata normal form. 23/10188 useless extension candidates. Maximal degree in co-relation 34379. Up to 9731 conditions per place. [2024-06-28 02:53:49,501 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 60 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-06-28 02:53:49,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 95 transitions, 652 flow [2024-06-28 02:53:49,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:53:49,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:53:49,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-28 02:53:49,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251572327044025 [2024-06-28 02:53:49,502 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 418 flow. Second operand 6 states and 167 transitions. [2024-06-28 02:53:49,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 95 transitions, 652 flow [2024-06-28 02:53:49,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 95 transitions, 609 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 02:53:49,512 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 438 flow [2024-06-28 02:53:49,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=438, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2024-06-28 02:53:49,513 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-28 02:53:49,513 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 438 flow [2024-06-28 02:53:49,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:49,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:53:49,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:53:49,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 02:53:49,514 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:53:49,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:53:49,514 INFO L85 PathProgramCache]: Analyzing trace with hash 930657979, now seen corresponding path program 1 times [2024-06-28 02:53:49,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:53:49,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745803051] [2024-06-28 02:53:49,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:53:49,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:53:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:53:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:53:50,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:53:50,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745803051] [2024-06-28 02:53:50,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745803051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:53:50,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:53:50,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:53:50,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412884631] [2024-06-28 02:53:50,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:53:50,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:53:50,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:53:50,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:53:50,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:53:50,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-28 02:53:50,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 438 flow. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:50,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:53:50,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-28 02:53:50,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:53:51,830 INFO L124 PetriNetUnfolderBase]: 8039/11620 cut-off events. [2024-06-28 02:53:51,830 INFO L125 PetriNetUnfolderBase]: For 36191/36191 co-relation queries the response was YES. [2024-06-28 02:53:51,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38845 conditions, 11620 events. 8039/11620 cut-off events. For 36191/36191 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 67822 event pairs, 3744 based on Foata normal form. 6/11521 useless extension candidates. Maximal degree in co-relation 38821. Up to 10907 conditions per place. [2024-06-28 02:53:51,914 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 84 selfloop transitions, 17 changer transitions 0/110 dead transitions. [2024-06-28 02:53:51,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 110 transitions, 777 flow [2024-06-28 02:53:51,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:53:51,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:53:51,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-28 02:53:51,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-28 02:53:51,915 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 438 flow. Second operand 7 states and 188 transitions. [2024-06-28 02:53:51,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 110 transitions, 777 flow [2024-06-28 02:53:51,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 686 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 02:53:51,938 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 459 flow [2024-06-28 02:53:51,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=459, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-06-28 02:53:51,938 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-28 02:53:51,939 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 459 flow [2024-06-28 02:53:51,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:51,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:53:51,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:53:51,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 02:53:51,939 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:53:51,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:53:51,940 INFO L85 PathProgramCache]: Analyzing trace with hash -534817897, now seen corresponding path program 1 times [2024-06-28 02:53:51,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:53:51,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258399523] [2024-06-28 02:53:51,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:53:51,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:53:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:53:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:53:52,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:53:52,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258399523] [2024-06-28 02:53:52,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258399523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:53:52,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:53:52,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:53:52,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420908150] [2024-06-28 02:53:52,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:53:52,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:53:52,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:53:52,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:53:52,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:53:52,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-28 02:53:52,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 459 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:52,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:53:52,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-28 02:53:52,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:53:54,107 INFO L124 PetriNetUnfolderBase]: 9687/13649 cut-off events. [2024-06-28 02:53:54,107 INFO L125 PetriNetUnfolderBase]: For 52991/52991 co-relation queries the response was YES. [2024-06-28 02:53:54,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48739 conditions, 13649 events. 9687/13649 cut-off events. For 52991/52991 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 76853 event pairs, 4731 based on Foata normal form. 2/13461 useless extension candidates. Maximal degree in co-relation 48713. Up to 13154 conditions per place. [2024-06-28 02:53:54,190 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 78 selfloop transitions, 10 changer transitions 0/96 dead transitions. [2024-06-28 02:53:54,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 96 transitions, 703 flow [2024-06-28 02:53:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:53:54,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:53:54,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-28 02:53:54,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830188679245283 [2024-06-28 02:53:54,192 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 459 flow. Second operand 5 states and 128 transitions. [2024-06-28 02:53:54,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 96 transitions, 703 flow [2024-06-28 02:53:54,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 96 transitions, 655 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 02:53:54,215 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 480 flow [2024-06-28 02:53:54,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=480, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-28 02:53:54,215 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-06-28 02:53:54,216 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 480 flow [2024-06-28 02:53:54,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:54,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:53:54,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:53:54,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 02:53:54,216 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:53:54,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:53:54,217 INFO L85 PathProgramCache]: Analyzing trace with hash 627327955, now seen corresponding path program 1 times [2024-06-28 02:53:54,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:53:54,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852663754] [2024-06-28 02:53:54,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:53:54,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:53:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:53:55,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:53:55,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:53:55,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852663754] [2024-06-28 02:53:55,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852663754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:53:55,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:53:55,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:53:55,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946896010] [2024-06-28 02:53:55,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:53:55,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:53:55,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:53:55,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:53:55,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:53:55,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-28 02:53:55,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 480 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:55,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:53:55,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-28 02:53:55,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:53:56,514 INFO L124 PetriNetUnfolderBase]: 9673/13827 cut-off events. [2024-06-28 02:53:56,514 INFO L125 PetriNetUnfolderBase]: For 66217/66217 co-relation queries the response was YES. [2024-06-28 02:53:56,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51911 conditions, 13827 events. 9673/13827 cut-off events. For 66217/66217 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 79396 event pairs, 4695 based on Foata normal form. 4/13813 useless extension candidates. Maximal degree in co-relation 51884. Up to 13118 conditions per place. [2024-06-28 02:53:56,602 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 83 selfloop transitions, 14 changer transitions 0/105 dead transitions. [2024-06-28 02:53:56,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 105 transitions, 760 flow [2024-06-28 02:53:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:53:56,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:53:56,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-28 02:53:56,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748427672955975 [2024-06-28 02:53:56,603 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 480 flow. Second operand 6 states and 151 transitions. [2024-06-28 02:53:56,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 105 transitions, 760 flow [2024-06-28 02:53:56,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 105 transitions, 721 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 02:53:56,628 INFO L231 Difference]: Finished difference. Result has 80 places, 86 transitions, 524 flow [2024-06-28 02:53:56,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=524, PETRI_PLACES=80, PETRI_TRANSITIONS=86} [2024-06-28 02:53:56,629 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2024-06-28 02:53:56,629 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 86 transitions, 524 flow [2024-06-28 02:53:56,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:56,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:53:56,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:53:56,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 02:53:56,630 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:53:56,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:53:56,630 INFO L85 PathProgramCache]: Analyzing trace with hash -661202356, now seen corresponding path program 1 times [2024-06-28 02:53:56,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:53:56,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538070410] [2024-06-28 02:53:56,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:53:56,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:53:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:53:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:53:57,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:53:57,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538070410] [2024-06-28 02:53:57,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538070410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:53:57,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:53:57,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:53:57,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265441618] [2024-06-28 02:53:57,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:53:57,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:53:57,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:53:57,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:53:57,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:53:57,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-28 02:53:57,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 86 transitions, 524 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:57,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:53:57,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-28 02:53:57,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:53:59,258 INFO L124 PetriNetUnfolderBase]: 10544/14829 cut-off events. [2024-06-28 02:53:59,258 INFO L125 PetriNetUnfolderBase]: For 103607/103699 co-relation queries the response was YES. [2024-06-28 02:53:59,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61284 conditions, 14829 events. 10544/14829 cut-off events. For 103607/103699 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 86454 event pairs, 3530 based on Foata normal form. 54/14788 useless extension candidates. Maximal degree in co-relation 61256. Up to 13486 conditions per place. [2024-06-28 02:53:59,372 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 92 selfloop transitions, 32 changer transitions 0/135 dead transitions. [2024-06-28 02:53:59,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 135 transitions, 1004 flow [2024-06-28 02:53:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:53:59,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:53:59,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-28 02:53:59,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444743935309974 [2024-06-28 02:53:59,374 INFO L175 Difference]: Start difference. First operand has 80 places, 86 transitions, 524 flow. Second operand 7 states and 202 transitions. [2024-06-28 02:53:59,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 135 transitions, 1004 flow [2024-06-28 02:53:59,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 135 transitions, 951 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-28 02:53:59,409 INFO L231 Difference]: Finished difference. Result has 83 places, 90 transitions, 604 flow [2024-06-28 02:53:59,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=604, PETRI_PLACES=83, PETRI_TRANSITIONS=90} [2024-06-28 02:53:59,410 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-06-28 02:53:59,410 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 90 transitions, 604 flow [2024-06-28 02:53:59,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:53:59,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:53:59,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:53:59,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 02:53:59,411 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:53:59,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:53:59,411 INFO L85 PathProgramCache]: Analyzing trace with hash -547522876, now seen corresponding path program 2 times [2024-06-28 02:53:59,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:53:59,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162092334] [2024-06-28 02:53:59,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:53:59,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:53:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:54:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:54:00,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:54:00,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162092334] [2024-06-28 02:54:00,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162092334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:54:00,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:54:00,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:54:00,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210190035] [2024-06-28 02:54:00,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:54:00,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:54:00,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:54:00,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:54:00,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:54:00,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-28 02:54:00,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 90 transitions, 604 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:00,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:54:00,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-28 02:54:00,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:54:02,069 INFO L124 PetriNetUnfolderBase]: 10600/14951 cut-off events. [2024-06-28 02:54:02,070 INFO L125 PetriNetUnfolderBase]: For 121450/121542 co-relation queries the response was YES. [2024-06-28 02:54:02,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64037 conditions, 14951 events. 10600/14951 cut-off events. For 121450/121542 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 87567 event pairs, 4670 based on Foata normal form. 87/14949 useless extension candidates. Maximal degree in co-relation 64008. Up to 14058 conditions per place. [2024-06-28 02:54:02,195 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 89 selfloop transitions, 31 changer transitions 0/131 dead transitions. [2024-06-28 02:54:02,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 131 transitions, 982 flow [2024-06-28 02:54:02,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:54:02,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:54:02,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-28 02:54:02,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5336927223719676 [2024-06-28 02:54:02,197 INFO L175 Difference]: Start difference. First operand has 83 places, 90 transitions, 604 flow. Second operand 7 states and 198 transitions. [2024-06-28 02:54:02,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 131 transitions, 982 flow [2024-06-28 02:54:02,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 131 transitions, 933 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-28 02:54:02,242 INFO L231 Difference]: Finished difference. Result has 87 places, 93 transitions, 672 flow [2024-06-28 02:54:02,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=672, PETRI_PLACES=87, PETRI_TRANSITIONS=93} [2024-06-28 02:54:02,243 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-28 02:54:02,243 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 93 transitions, 672 flow [2024-06-28 02:54:02,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:02,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:54:02,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:54:02,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 02:54:02,244 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:54:02,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:54:02,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2028068004, now seen corresponding path program 1 times [2024-06-28 02:54:02,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:54:02,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502729946] [2024-06-28 02:54:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:54:02,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:54:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:54:03,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:54:03,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:54:03,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502729946] [2024-06-28 02:54:03,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502729946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:54:03,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:54:03,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:54:03,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430335098] [2024-06-28 02:54:03,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:54:03,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:54:03,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:54:03,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:54:03,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:54:03,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:54:03,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 93 transitions, 672 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:03,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:54:03,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:54:03,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:54:04,669 INFO L124 PetriNetUnfolderBase]: 11492/15928 cut-off events. [2024-06-28 02:54:04,670 INFO L125 PetriNetUnfolderBase]: For 133098/133104 co-relation queries the response was YES. [2024-06-28 02:54:04,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69227 conditions, 15928 events. 11492/15928 cut-off events. For 133098/133104 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 88015 event pairs, 5351 based on Foata normal form. 6/15931 useless extension candidates. Maximal degree in co-relation 69196. Up to 15573 conditions per place. [2024-06-28 02:54:04,788 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 99 selfloop transitions, 21 changer transitions 0/127 dead transitions. [2024-06-28 02:54:04,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 127 transitions, 1114 flow [2024-06-28 02:54:04,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:54:04,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:54:04,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-28 02:54:04,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48742138364779874 [2024-06-28 02:54:04,790 INFO L175 Difference]: Start difference. First operand has 87 places, 93 transitions, 672 flow. Second operand 6 states and 155 transitions. [2024-06-28 02:54:04,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 127 transitions, 1114 flow [2024-06-28 02:54:04,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 127 transitions, 1033 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 02:54:04,892 INFO L231 Difference]: Finished difference. Result has 88 places, 101 transitions, 738 flow [2024-06-28 02:54:04,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=738, PETRI_PLACES=88, PETRI_TRANSITIONS=101} [2024-06-28 02:54:04,894 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-06-28 02:54:04,894 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 101 transitions, 738 flow [2024-06-28 02:54:04,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:04,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:54:04,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:54:04,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 02:54:04,894 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:54:04,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:54:04,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1122144372, now seen corresponding path program 1 times [2024-06-28 02:54:04,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:54:04,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925126544] [2024-06-28 02:54:04,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:54:04,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:54:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:54:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:54:05,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:54:05,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925126544] [2024-06-28 02:54:05,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925126544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:54:05,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:54:05,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:54:05,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083718242] [2024-06-28 02:54:05,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:54:05,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:54:05,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:54:05,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:54:05,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:54:06,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-28 02:54:06,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 101 transitions, 738 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:06,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:54:06,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-28 02:54:06,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:54:07,871 INFO L124 PetriNetUnfolderBase]: 11020/15467 cut-off events. [2024-06-28 02:54:07,871 INFO L125 PetriNetUnfolderBase]: For 161470/161470 co-relation queries the response was YES. [2024-06-28 02:54:07,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71177 conditions, 15467 events. 11020/15467 cut-off events. For 161470/161470 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 87711 event pairs, 4612 based on Foata normal form. 6/15400 useless extension candidates. Maximal degree in co-relation 71145. Up to 14615 conditions per place. [2024-06-28 02:54:07,996 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 101 selfloop transitions, 44 changer transitions 0/156 dead transitions. [2024-06-28 02:54:07,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 156 transitions, 1261 flow [2024-06-28 02:54:07,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:54:07,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:54:07,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-28 02:54:07,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-06-28 02:54:07,998 INFO L175 Difference]: Start difference. First operand has 88 places, 101 transitions, 738 flow. Second operand 8 states and 215 transitions. [2024-06-28 02:54:07,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 156 transitions, 1261 flow [2024-06-28 02:54:08,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 156 transitions, 1215 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-28 02:54:08,235 INFO L231 Difference]: Finished difference. Result has 95 places, 116 transitions, 941 flow [2024-06-28 02:54:08,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=941, PETRI_PLACES=95, PETRI_TRANSITIONS=116} [2024-06-28 02:54:08,235 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-28 02:54:08,235 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 116 transitions, 941 flow [2024-06-28 02:54:08,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:08,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:54:08,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:54:08,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 02:54:08,236 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:54:08,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:54:08,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1009179290, now seen corresponding path program 2 times [2024-06-28 02:54:08,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:54:08,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367007913] [2024-06-28 02:54:08,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:54:08,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:54:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:54:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:54:09,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:54:09,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367007913] [2024-06-28 02:54:09,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367007913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:54:09,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:54:09,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:54:09,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540866638] [2024-06-28 02:54:09,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:54:09,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:54:09,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:54:09,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:54:09,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:54:09,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-28 02:54:09,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 116 transitions, 941 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:09,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:54:09,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-28 02:54:09,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:54:11,120 INFO L124 PetriNetUnfolderBase]: 11097/15602 cut-off events. [2024-06-28 02:54:11,120 INFO L125 PetriNetUnfolderBase]: For 183458/183458 co-relation queries the response was YES. [2024-06-28 02:54:11,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74647 conditions, 15602 events. 11097/15602 cut-off events. For 183458/183458 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 88708 event pairs, 4163 based on Foata normal form. 6/15535 useless extension candidates. Maximal degree in co-relation 74612. Up to 14445 conditions per place. [2024-06-28 02:54:11,224 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 105 selfloop transitions, 55 changer transitions 0/171 dead transitions. [2024-06-28 02:54:11,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 171 transitions, 1577 flow [2024-06-28 02:54:11,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:54:11,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:54:11,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-28 02:54:11,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235849056603774 [2024-06-28 02:54:11,226 INFO L175 Difference]: Start difference. First operand has 95 places, 116 transitions, 941 flow. Second operand 8 states and 222 transitions. [2024-06-28 02:54:11,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 171 transitions, 1577 flow [2024-06-28 02:54:11,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 171 transitions, 1487 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-28 02:54:11,323 INFO L231 Difference]: Finished difference. Result has 101 places, 124 transitions, 1118 flow [2024-06-28 02:54:11,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1118, PETRI_PLACES=101, PETRI_TRANSITIONS=124} [2024-06-28 02:54:11,324 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-06-28 02:54:11,324 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 124 transitions, 1118 flow [2024-06-28 02:54:11,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:11,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:54:11,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:54:11,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 02:54:11,325 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:54:11,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:54:11,325 INFO L85 PathProgramCache]: Analyzing trace with hash 772707260, now seen corresponding path program 3 times [2024-06-28 02:54:11,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:54:11,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068955592] [2024-06-28 02:54:11,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:54:11,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:54:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:54:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:54:12,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:54:12,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068955592] [2024-06-28 02:54:12,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068955592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:54:12,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:54:12,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:54:12,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700477019] [2024-06-28 02:54:12,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:54:12,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:54:12,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:54:12,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:54:12,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:54:12,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-28 02:54:12,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 124 transitions, 1118 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:12,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:54:12,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-28 02:54:12,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:54:14,315 INFO L124 PetriNetUnfolderBase]: 11082/15581 cut-off events. [2024-06-28 02:54:14,315 INFO L125 PetriNetUnfolderBase]: For 208090/208090 co-relation queries the response was YES. [2024-06-28 02:54:14,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76940 conditions, 15581 events. 11082/15581 cut-off events. For 208090/208090 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 88691 event pairs, 4624 based on Foata normal form. 6/15514 useless extension candidates. Maximal degree in co-relation 76903. Up to 14713 conditions per place. [2024-06-28 02:54:14,443 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 110 selfloop transitions, 44 changer transitions 0/165 dead transitions. [2024-06-28 02:54:14,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 165 transitions, 1539 flow [2024-06-28 02:54:14,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:54:14,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:54:14,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-28 02:54:14,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-06-28 02:54:14,445 INFO L175 Difference]: Start difference. First operand has 101 places, 124 transitions, 1118 flow. Second operand 8 states and 215 transitions. [2024-06-28 02:54:14,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 165 transitions, 1539 flow [2024-06-28 02:54:14,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 165 transitions, 1424 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-28 02:54:14,629 INFO L231 Difference]: Finished difference. Result has 106 places, 125 transitions, 1122 flow [2024-06-28 02:54:14,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1122, PETRI_PLACES=106, PETRI_TRANSITIONS=125} [2024-06-28 02:54:14,629 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-06-28 02:54:14,629 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 125 transitions, 1122 flow [2024-06-28 02:54:14,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:14,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:54:14,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:54:14,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 02:54:14,630 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:54:14,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:54:14,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1436116342, now seen corresponding path program 2 times [2024-06-28 02:54:14,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:54:14,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458831701] [2024-06-28 02:54:14,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:54:14,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:54:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:54:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:54:15,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:54:15,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458831701] [2024-06-28 02:54:15,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458831701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:54:15,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:54:15,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:54:15,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163556028] [2024-06-28 02:54:15,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:54:15,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:54:15,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:54:15,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:54:15,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:54:15,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:54:15,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 125 transitions, 1122 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:15,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:54:15,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:54:15,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:54:17,416 INFO L124 PetriNetUnfolderBase]: 11605/16125 cut-off events. [2024-06-28 02:54:17,416 INFO L125 PetriNetUnfolderBase]: For 218586/218600 co-relation queries the response was YES. [2024-06-28 02:54:17,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79448 conditions, 16125 events. 11605/16125 cut-off events. For 218586/218600 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 89614 event pairs, 5059 based on Foata normal form. 12/16133 useless extension candidates. Maximal degree in co-relation 79408. Up to 15746 conditions per place. [2024-06-28 02:54:17,594 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 115 selfloop transitions, 21 changer transitions 0/143 dead transitions. [2024-06-28 02:54:17,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 143 transitions, 1440 flow [2024-06-28 02:54:17,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:54:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:54:17,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-28 02:54:17,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-28 02:54:17,596 INFO L175 Difference]: Start difference. First operand has 106 places, 125 transitions, 1122 flow. Second operand 6 states and 147 transitions. [2024-06-28 02:54:17,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 143 transitions, 1440 flow [2024-06-28 02:54:17,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 143 transitions, 1312 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 02:54:17,769 INFO L231 Difference]: Finished difference. Result has 107 places, 125 transitions, 1045 flow [2024-06-28 02:54:17,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1045, PETRI_PLACES=107, PETRI_TRANSITIONS=125} [2024-06-28 02:54:17,776 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-06-28 02:54:17,776 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 125 transitions, 1045 flow [2024-06-28 02:54:17,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:17,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:54:17,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:54:17,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 02:54:17,777 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:54:17,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:54:17,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1435914904, now seen corresponding path program 1 times [2024-06-28 02:54:17,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:54:17,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947140755] [2024-06-28 02:54:17,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:54:17,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:54:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:54:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:54:18,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:54:18,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947140755] [2024-06-28 02:54:18,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947140755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:54:18,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:54:18,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:54:18,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028371971] [2024-06-28 02:54:18,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:54:18,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:54:18,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:54:18,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:54:18,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:54:18,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-28 02:54:18,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 125 transitions, 1045 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:18,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:54:18,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-28 02:54:18,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:54:20,393 INFO L124 PetriNetUnfolderBase]: 10226/14563 cut-off events. [2024-06-28 02:54:20,394 INFO L125 PetriNetUnfolderBase]: For 202699/202705 co-relation queries the response was YES. [2024-06-28 02:54:20,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71778 conditions, 14563 events. 10226/14563 cut-off events. For 202699/202705 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 83726 event pairs, 4306 based on Foata normal form. 6/14536 useless extension candidates. Maximal degree in co-relation 71737. Up to 13926 conditions per place. [2024-06-28 02:54:20,514 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 127 selfloop transitions, 21 changer transitions 0/156 dead transitions. [2024-06-28 02:54:20,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 156 transitions, 1555 flow [2024-06-28 02:54:20,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:54:20,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:54:20,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-28 02:54:20,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4937106918238994 [2024-06-28 02:54:20,517 INFO L175 Difference]: Start difference. First operand has 107 places, 125 transitions, 1045 flow. Second operand 6 states and 157 transitions. [2024-06-28 02:54:20,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 156 transitions, 1555 flow [2024-06-28 02:54:20,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 156 transitions, 1496 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 02:54:20,657 INFO L231 Difference]: Finished difference. Result has 108 places, 133 transitions, 1133 flow [2024-06-28 02:54:20,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1133, PETRI_PLACES=108, PETRI_TRANSITIONS=133} [2024-06-28 02:54:20,658 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-28 02:54:20,658 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 133 transitions, 1133 flow [2024-06-28 02:54:20,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:20,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:54:20,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:54:20,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 02:54:20,659 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:54:20,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:54:20,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1999970472, now seen corresponding path program 2 times [2024-06-28 02:54:20,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:54:20,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100648560] [2024-06-28 02:54:20,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:54:20,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:54:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:54:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:54:21,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:54:21,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100648560] [2024-06-28 02:54:21,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100648560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:54:21,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:54:21,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:54:21,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682952387] [2024-06-28 02:54:21,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:54:21,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:54:21,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:54:21,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:54:21,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:54:21,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-28 02:54:21,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 133 transitions, 1133 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:21,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:54:21,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-28 02:54:21,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:54:23,065 INFO L124 PetriNetUnfolderBase]: 10219/14555 cut-off events. [2024-06-28 02:54:23,066 INFO L125 PetriNetUnfolderBase]: For 227584/227589 co-relation queries the response was YES. [2024-06-28 02:54:23,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74882 conditions, 14555 events. 10219/14555 cut-off events. For 227584/227589 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 83688 event pairs, 4309 based on Foata normal form. 6/14528 useless extension candidates. Maximal degree in co-relation 74840. Up to 13919 conditions per place. [2024-06-28 02:54:23,185 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 122 selfloop transitions, 21 changer transitions 0/151 dead transitions. [2024-06-28 02:54:23,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 151 transitions, 1465 flow [2024-06-28 02:54:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:54:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:54:23,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-28 02:54:23,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2024-06-28 02:54:23,187 INFO L175 Difference]: Start difference. First operand has 108 places, 133 transitions, 1133 flow. Second operand 6 states and 152 transitions. [2024-06-28 02:54:23,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 151 transitions, 1465 flow [2024-06-28 02:54:23,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 151 transitions, 1362 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-28 02:54:23,329 INFO L231 Difference]: Finished difference. Result has 111 places, 133 transitions, 1081 flow [2024-06-28 02:54:23,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1030, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1081, PETRI_PLACES=111, PETRI_TRANSITIONS=133} [2024-06-28 02:54:23,330 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-28 02:54:23,330 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 133 transitions, 1081 flow [2024-06-28 02:54:23,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:23,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:54:23,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:54:23,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 02:54:23,331 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:54:23,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:54:23,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1808571832, now seen corresponding path program 1 times [2024-06-28 02:54:23,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:54:23,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610269370] [2024-06-28 02:54:23,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:54:23,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:54:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:54:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:54:24,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:54:24,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610269370] [2024-06-28 02:54:24,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610269370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:54:24,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:54:24,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:54:24,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374463173] [2024-06-28 02:54:24,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:54:24,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:54:24,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:54:24,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:54:24,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:54:24,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:54:24,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 133 transitions, 1081 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:24,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:54:24,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:54:24,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:54:26,402 INFO L124 PetriNetUnfolderBase]: 11669/16225 cut-off events. [2024-06-28 02:54:26,402 INFO L125 PetriNetUnfolderBase]: For 285153/285164 co-relation queries the response was YES. [2024-06-28 02:54:26,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84617 conditions, 16225 events. 11669/16225 cut-off events. For 285153/285164 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 90330 event pairs, 4988 based on Foata normal form. 12/16231 useless extension candidates. Maximal degree in co-relation 84574. Up to 15602 conditions per place. [2024-06-28 02:54:26,584 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 130 selfloop transitions, 52 changer transitions 0/189 dead transitions. [2024-06-28 02:54:26,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 189 transitions, 1886 flow [2024-06-28 02:54:26,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:54:26,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:54:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-28 02:54:26,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121293800539084 [2024-06-28 02:54:26,586 INFO L175 Difference]: Start difference. First operand has 111 places, 133 transitions, 1081 flow. Second operand 7 states and 190 transitions. [2024-06-28 02:54:26,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 189 transitions, 1886 flow [2024-06-28 02:54:26,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 189 transitions, 1831 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 02:54:26,773 INFO L231 Difference]: Finished difference. Result has 115 places, 151 transitions, 1394 flow [2024-06-28 02:54:26,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1394, PETRI_PLACES=115, PETRI_TRANSITIONS=151} [2024-06-28 02:54:26,774 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 59 predicate places. [2024-06-28 02:54:26,774 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 151 transitions, 1394 flow [2024-06-28 02:54:26,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:26,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:54:26,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:54:26,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 02:54:26,775 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:54:26,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:54:26,775 INFO L85 PathProgramCache]: Analyzing trace with hash -226182346, now seen corresponding path program 1 times [2024-06-28 02:54:26,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:54:26,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521751224] [2024-06-28 02:54:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:54:26,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:54:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:54:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:54:27,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:54:27,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521751224] [2024-06-28 02:54:27,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521751224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:54:27,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:54:27,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:54:27,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166532082] [2024-06-28 02:54:27,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:54:27,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:54:27,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:54:27,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:54:27,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:54:27,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-28 02:54:27,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 151 transitions, 1394 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:27,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:54:27,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-28 02:54:27,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:54:29,960 INFO L124 PetriNetUnfolderBase]: 11599/16298 cut-off events. [2024-06-28 02:54:29,960 INFO L125 PetriNetUnfolderBase]: For 341932/342026 co-relation queries the response was YES. [2024-06-28 02:54:30,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91066 conditions, 16298 events. 11599/16298 cut-off events. For 341932/342026 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 93174 event pairs, 4694 based on Foata normal form. 18/16107 useless extension candidates. Maximal degree in co-relation 91020. Up to 14887 conditions per place. [2024-06-28 02:54:30,104 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 139 selfloop transitions, 53 changer transitions 0/208 dead transitions. [2024-06-28 02:54:30,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 208 transitions, 2015 flow [2024-06-28 02:54:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:54:30,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:54:30,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-28 02:54:30,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-28 02:54:30,106 INFO L175 Difference]: Start difference. First operand has 115 places, 151 transitions, 1394 flow. Second operand 8 states and 220 transitions. [2024-06-28 02:54:30,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 208 transitions, 2015 flow [2024-06-28 02:54:30,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 208 transitions, 1915 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-28 02:54:30,319 INFO L231 Difference]: Finished difference. Result has 122 places, 160 transitions, 1563 flow [2024-06-28 02:54:30,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1563, PETRI_PLACES=122, PETRI_TRANSITIONS=160} [2024-06-28 02:54:30,319 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-06-28 02:54:30,319 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 160 transitions, 1563 flow [2024-06-28 02:54:30,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:30,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:54:30,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:54:30,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 02:54:30,320 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:54:30,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:54:30,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1215671908, now seen corresponding path program 2 times [2024-06-28 02:54:30,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:54:30,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059043856] [2024-06-28 02:54:30,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:54:30,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:54:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:54:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:54:31,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:54:31,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059043856] [2024-06-28 02:54:31,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059043856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:54:31,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:54:31,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:54:31,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670637035] [2024-06-28 02:54:31,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:54:31,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:54:31,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:54:31,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:54:31,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:54:31,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:54:31,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 160 transitions, 1563 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:31,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:54:31,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:54:31,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:54:33,322 INFO L124 PetriNetUnfolderBase]: 11994/16732 cut-off events. [2024-06-28 02:54:33,322 INFO L125 PetriNetUnfolderBase]: For 351698/351709 co-relation queries the response was YES. [2024-06-28 02:54:33,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93636 conditions, 16732 events. 11994/16732 cut-off events. For 351698/351709 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 93784 event pairs, 5032 based on Foata normal form. 12/16738 useless extension candidates. Maximal degree in co-relation 93587. Up to 16041 conditions per place. [2024-06-28 02:54:33,498 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 137 selfloop transitions, 58 changer transitions 0/202 dead transitions. [2024-06-28 02:54:33,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 202 transitions, 2327 flow [2024-06-28 02:54:33,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:54:33,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:54:33,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-28 02:54:33,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-28 02:54:33,501 INFO L175 Difference]: Start difference. First operand has 122 places, 160 transitions, 1563 flow. Second operand 7 states and 184 transitions. [2024-06-28 02:54:33,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 202 transitions, 2327 flow [2024-06-28 02:54:33,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 202 transitions, 2237 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-28 02:54:33,840 INFO L231 Difference]: Finished difference. Result has 127 places, 170 transitions, 1747 flow [2024-06-28 02:54:33,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1747, PETRI_PLACES=127, PETRI_TRANSITIONS=170} [2024-06-28 02:54:33,840 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-28 02:54:33,840 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 170 transitions, 1747 flow [2024-06-28 02:54:33,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:33,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:54:33,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:54:33,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 02:54:33,841 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:54:33,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:54:33,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1215672280, now seen corresponding path program 1 times [2024-06-28 02:54:33,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:54:33,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812835177] [2024-06-28 02:54:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:54:33,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:54:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:54:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:54:34,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:54:34,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812835177] [2024-06-28 02:54:34,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812835177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:54:34,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:54:34,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:54:34,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595286327] [2024-06-28 02:54:34,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:54:34,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:54:34,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:54:34,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:54:34,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:54:34,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:54:34,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 170 transitions, 1747 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:34,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:54:34,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:54:34,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:54:36,962 INFO L124 PetriNetUnfolderBase]: 12026/16772 cut-off events. [2024-06-28 02:54:36,962 INFO L125 PetriNetUnfolderBase]: For 376231/376231 co-relation queries the response was YES. [2024-06-28 02:54:37,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94949 conditions, 16772 events. 12026/16772 cut-off events. For 376231/376231 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 93845 event pairs, 4971 based on Foata normal form. 4/16770 useless extension candidates. Maximal degree in co-relation 94898. Up to 16273 conditions per place. [2024-06-28 02:54:37,178 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 173 selfloop transitions, 31 changer transitions 0/211 dead transitions. [2024-06-28 02:54:37,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 211 transitions, 2449 flow [2024-06-28 02:54:37,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:54:37,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:54:37,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-28 02:54:37,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48787061994609165 [2024-06-28 02:54:37,180 INFO L175 Difference]: Start difference. First operand has 127 places, 170 transitions, 1747 flow. Second operand 7 states and 181 transitions. [2024-06-28 02:54:37,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 211 transitions, 2449 flow [2024-06-28 02:54:37,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 211 transitions, 2339 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-28 02:54:37,541 INFO L231 Difference]: Finished difference. Result has 131 places, 178 transitions, 1840 flow [2024-06-28 02:54:37,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1840, PETRI_PLACES=131, PETRI_TRANSITIONS=178} [2024-06-28 02:54:37,541 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-28 02:54:37,542 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 178 transitions, 1840 flow [2024-06-28 02:54:37,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:37,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:54:37,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:54:37,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 02:54:37,542 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:54:37,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:54:37,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1210592054, now seen corresponding path program 2 times [2024-06-28 02:54:37,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:54:37,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525732167] [2024-06-28 02:54:37,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:54:37,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:54:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:54:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:54:38,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:54:38,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525732167] [2024-06-28 02:54:38,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525732167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:54:38,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:54:38,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:54:38,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235867714] [2024-06-28 02:54:38,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:54:38,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:54:38,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:54:38,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:54:38,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:54:38,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-28 02:54:38,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 178 transitions, 1840 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:38,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:54:38,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-28 02:54:38,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:54:40,711 INFO L124 PetriNetUnfolderBase]: 11694/16422 cut-off events. [2024-06-28 02:54:40,712 INFO L125 PetriNetUnfolderBase]: For 434236/434330 co-relation queries the response was YES. [2024-06-28 02:54:40,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97163 conditions, 16422 events. 11694/16422 cut-off events. For 434236/434330 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 93765 event pairs, 3352 based on Foata normal form. 18/16203 useless extension candidates. Maximal degree in co-relation 97111. Up to 14304 conditions per place. [2024-06-28 02:54:40,888 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 141 selfloop transitions, 61 changer transitions 0/220 dead transitions. [2024-06-28 02:54:40,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 220 transitions, 2362 flow [2024-06-28 02:54:40,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:54:40,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:54:40,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-28 02:54:40,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-28 02:54:40,889 INFO L175 Difference]: Start difference. First operand has 131 places, 178 transitions, 1840 flow. Second operand 7 states and 196 transitions. [2024-06-28 02:54:40,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 220 transitions, 2362 flow [2024-06-28 02:54:41,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 220 transitions, 2272 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-28 02:54:41,319 INFO L231 Difference]: Finished difference. Result has 135 places, 178 transitions, 1885 flow [2024-06-28 02:54:41,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1885, PETRI_PLACES=135, PETRI_TRANSITIONS=178} [2024-06-28 02:54:41,320 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-28 02:54:41,320 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 178 transitions, 1885 flow [2024-06-28 02:54:41,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:41,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:54:41,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:54:41,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 02:54:41,320 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:54:41,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:54:41,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1403042106, now seen corresponding path program 3 times [2024-06-28 02:54:41,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:54:41,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794447445] [2024-06-28 02:54:41,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:54:41,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:54:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:54:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:54:42,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:54:42,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794447445] [2024-06-28 02:54:42,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794447445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:54:42,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:54:42,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:54:42,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221759754] [2024-06-28 02:54:42,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:54:42,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:54:42,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:54:42,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:54:42,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:54:42,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-28 02:54:42,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 178 transitions, 1885 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:42,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:54:42,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-28 02:54:42,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:54:44,359 INFO L124 PetriNetUnfolderBase]: 11610/16316 cut-off events. [2024-06-28 02:54:44,359 INFO L125 PetriNetUnfolderBase]: For 453209/453303 co-relation queries the response was YES. [2024-06-28 02:54:44,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97797 conditions, 16316 events. 11610/16316 cut-off events. For 453209/453303 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 93174 event pairs, 2823 based on Foata normal form. 18/16148 useless extension candidates. Maximal degree in co-relation 97743. Up to 14000 conditions per place. [2024-06-28 02:54:44,545 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 135 selfloop transitions, 63 changer transitions 0/216 dead transitions. [2024-06-28 02:54:44,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 216 transitions, 2397 flow [2024-06-28 02:54:44,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:54:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:54:44,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-28 02:54:44,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-28 02:54:44,546 INFO L175 Difference]: Start difference. First operand has 135 places, 178 transitions, 1885 flow. Second operand 7 states and 189 transitions. [2024-06-28 02:54:44,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 216 transitions, 2397 flow [2024-06-28 02:54:44,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 216 transitions, 2235 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 02:54:44,873 INFO L231 Difference]: Finished difference. Result has 135 places, 179 transitions, 1872 flow [2024-06-28 02:54:44,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1872, PETRI_PLACES=135, PETRI_TRANSITIONS=179} [2024-06-28 02:54:44,874 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-28 02:54:44,874 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 179 transitions, 1872 flow [2024-06-28 02:54:44,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:44,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:54:44,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:54:44,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 02:54:44,875 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:54:44,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:54:44,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1566379534, now seen corresponding path program 2 times [2024-06-28 02:54:44,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:54:44,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835616782] [2024-06-28 02:54:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:54:44,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:54:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:54:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:54:45,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:54:45,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835616782] [2024-06-28 02:54:45,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835616782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:54:45,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:54:45,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:54:45,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520761271] [2024-06-28 02:54:45,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:54:45,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:54:45,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:54:45,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:54:45,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:54:45,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:54:45,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 179 transitions, 1872 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:45,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:54:45,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:54:45,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:54:47,912 INFO L124 PetriNetUnfolderBase]: 11980/16707 cut-off events. [2024-06-28 02:54:47,912 INFO L125 PetriNetUnfolderBase]: For 439177/439193 co-relation queries the response was YES. [2024-06-28 02:54:47,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99433 conditions, 16707 events. 11980/16707 cut-off events. For 439177/439193 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 93478 event pairs, 4929 based on Foata normal form. 16/16719 useless extension candidates. Maximal degree in co-relation 99378. Up to 16188 conditions per place. [2024-06-28 02:54:48,078 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 166 selfloop transitions, 36 changer transitions 0/209 dead transitions. [2024-06-28 02:54:48,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 209 transitions, 2504 flow [2024-06-28 02:54:48,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:54:48,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:54:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-28 02:54:48,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636118598382749 [2024-06-28 02:54:48,079 INFO L175 Difference]: Start difference. First operand has 135 places, 179 transitions, 1872 flow. Second operand 7 states and 172 transitions. [2024-06-28 02:54:48,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 209 transitions, 2504 flow [2024-06-28 02:54:48,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 209 transitions, 2347 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 02:54:48,394 INFO L231 Difference]: Finished difference. Result has 137 places, 183 transitions, 1864 flow [2024-06-28 02:54:48,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1864, PETRI_PLACES=137, PETRI_TRANSITIONS=183} [2024-06-28 02:54:48,395 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2024-06-28 02:54:48,395 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 183 transitions, 1864 flow [2024-06-28 02:54:48,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:48,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:54:48,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:54:48,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 02:54:48,396 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:54:48,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:54:48,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1569935320, now seen corresponding path program 3 times [2024-06-28 02:54:48,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:54:48,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167226595] [2024-06-28 02:54:48,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:54:48,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:54:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:54:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:54:49,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:54:49,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167226595] [2024-06-28 02:54:49,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167226595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:54:49,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:54:49,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:54:49,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619195078] [2024-06-28 02:54:49,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:54:49,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:54:49,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:54:49,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:54:49,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:54:49,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:54:49,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 183 transitions, 1864 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:49,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:54:49,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:54:49,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:54:51,616 INFO L124 PetriNetUnfolderBase]: 11966/16689 cut-off events. [2024-06-28 02:54:51,616 INFO L125 PetriNetUnfolderBase]: For 462234/462250 co-relation queries the response was YES. [2024-06-28 02:54:51,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99540 conditions, 16689 events. 11966/16689 cut-off events. For 462234/462250 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 93300 event pairs, 4927 based on Foata normal form. 16/16701 useless extension candidates. Maximal degree in co-relation 99484. Up to 16176 conditions per place. [2024-06-28 02:54:51,843 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 166 selfloop transitions, 35 changer transitions 0/208 dead transitions. [2024-06-28 02:54:51,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 208 transitions, 2328 flow [2024-06-28 02:54:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:54:51,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:54:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-28 02:54:51,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636118598382749 [2024-06-28 02:54:51,844 INFO L175 Difference]: Start difference. First operand has 137 places, 183 transitions, 1864 flow. Second operand 7 states and 172 transitions. [2024-06-28 02:54:51,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 208 transitions, 2328 flow [2024-06-28 02:54:52,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 208 transitions, 2172 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-28 02:54:52,227 INFO L231 Difference]: Finished difference. Result has 140 places, 183 transitions, 1787 flow [2024-06-28 02:54:52,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1708, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1787, PETRI_PLACES=140, PETRI_TRANSITIONS=183} [2024-06-28 02:54:52,227 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-06-28 02:54:52,228 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 183 transitions, 1787 flow [2024-06-28 02:54:52,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:52,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:54:52,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:54:52,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 02:54:52,228 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:54:52,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:54:52,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1569934948, now seen corresponding path program 3 times [2024-06-28 02:54:52,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:54:52,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957462512] [2024-06-28 02:54:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:54:52,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:54:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:54:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:54:53,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:54:53,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957462512] [2024-06-28 02:54:53,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957462512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:54:53,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:54:53,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:54:53,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929140350] [2024-06-28 02:54:53,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:54:53,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:54:53,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:54:53,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:54:53,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:54:53,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:54:53,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 183 transitions, 1787 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:53,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:54:53,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:54:53,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:54:56,165 INFO L124 PetriNetUnfolderBase]: 11957/16678 cut-off events. [2024-06-28 02:54:56,165 INFO L125 PetriNetUnfolderBase]: For 489213/489227 co-relation queries the response was YES. [2024-06-28 02:54:56,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100187 conditions, 16678 events. 11957/16678 cut-off events. For 489213/489227 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 93408 event pairs, 5003 based on Foata normal form. 14/16680 useless extension candidates. Maximal degree in co-relation 100130. Up to 15988 conditions per place. [2024-06-28 02:54:56,334 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 144 selfloop transitions, 58 changer transitions 0/209 dead transitions. [2024-06-28 02:54:56,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 209 transitions, 2463 flow [2024-06-28 02:54:56,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:54:56,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:54:56,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-28 02:54:56,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-28 02:54:56,336 INFO L175 Difference]: Start difference. First operand has 140 places, 183 transitions, 1787 flow. Second operand 7 states and 178 transitions. [2024-06-28 02:54:56,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 209 transitions, 2463 flow [2024-06-28 02:54:56,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 209 transitions, 2339 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-28 02:54:56,624 INFO L231 Difference]: Finished difference. Result has 140 places, 183 transitions, 1790 flow [2024-06-28 02:54:56,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1790, PETRI_PLACES=140, PETRI_TRANSITIONS=183} [2024-06-28 02:54:56,636 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-06-28 02:54:56,637 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 183 transitions, 1790 flow [2024-06-28 02:54:56,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:56,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:54:56,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:54:56,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 02:54:56,637 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:54:56,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:54:56,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1539606588, now seen corresponding path program 1 times [2024-06-28 02:54:56,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:54:56,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263752263] [2024-06-28 02:54:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:54:56,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:54:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:54:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:54:57,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:54:57,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263752263] [2024-06-28 02:54:57,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263752263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:54:57,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:54:57,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:54:57,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722648863] [2024-06-28 02:54:57,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:54:57,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:54:57,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:54:57,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:54:57,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:54:57,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-28 02:54:57,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 183 transitions, 1790 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:54:57,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:54:57,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-28 02:54:57,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:54:59,689 INFO L124 PetriNetUnfolderBase]: 10578/15117 cut-off events. [2024-06-28 02:54:59,690 INFO L125 PetriNetUnfolderBase]: For 443917/443917 co-relation queries the response was YES. [2024-06-28 02:54:59,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90614 conditions, 15117 events. 10578/15117 cut-off events. For 443917/443917 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 87573 event pairs, 4216 based on Foata normal form. 2/15077 useless extension candidates. Maximal degree in co-relation 90556. Up to 14427 conditions per place. [2024-06-28 02:54:59,867 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 189 selfloop transitions, 18 changer transitions 0/215 dead transitions. [2024-06-28 02:54:59,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 215 transitions, 2334 flow [2024-06-28 02:54:59,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:54:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:54:59,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-28 02:54:59,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-28 02:54:59,869 INFO L175 Difference]: Start difference. First operand has 140 places, 183 transitions, 1790 flow. Second operand 7 states and 177 transitions. [2024-06-28 02:54:59,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 215 transitions, 2334 flow [2024-06-28 02:55:00,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 215 transitions, 2177 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 02:55:00,304 INFO L231 Difference]: Finished difference. Result has 141 places, 187 transitions, 1744 flow [2024-06-28 02:55:00,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1633, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1744, PETRI_PLACES=141, PETRI_TRANSITIONS=187} [2024-06-28 02:55:00,305 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2024-06-28 02:55:00,305 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 187 transitions, 1744 flow [2024-06-28 02:55:00,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:00,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:00,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:00,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 02:55:00,305 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:55:00,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:00,306 INFO L85 PathProgramCache]: Analyzing trace with hash -2069909496, now seen corresponding path program 2 times [2024-06-28 02:55:00,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:00,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305468030] [2024-06-28 02:55:00,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:00,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:01,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:01,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305468030] [2024-06-28 02:55:01,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305468030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:01,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:01,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:55:01,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607811966] [2024-06-28 02:55:01,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:01,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:55:01,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:01,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:55:01,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:55:01,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-28 02:55:01,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 187 transitions, 1744 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:01,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:01,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-28 02:55:01,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:03,170 INFO L124 PetriNetUnfolderBase]: 10594/15216 cut-off events. [2024-06-28 02:55:03,170 INFO L125 PetriNetUnfolderBase]: For 481281/481284 co-relation queries the response was YES. [2024-06-28 02:55:03,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93335 conditions, 15216 events. 10594/15216 cut-off events. For 481281/481284 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 89010 event pairs, 4214 based on Foata normal form. 4/15183 useless extension candidates. Maximal degree in co-relation 93278. Up to 14401 conditions per place. [2024-06-28 02:55:03,386 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 179 selfloop transitions, 35 changer transitions 0/222 dead transitions. [2024-06-28 02:55:03,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 222 transitions, 2484 flow [2024-06-28 02:55:03,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:03,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:03,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-28 02:55:03,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48517520215633425 [2024-06-28 02:55:03,388 INFO L175 Difference]: Start difference. First operand has 141 places, 187 transitions, 1744 flow. Second operand 7 states and 180 transitions. [2024-06-28 02:55:03,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 222 transitions, 2484 flow [2024-06-28 02:55:03,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 222 transitions, 2403 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-28 02:55:03,850 INFO L231 Difference]: Finished difference. Result has 143 places, 195 transitions, 1882 flow [2024-06-28 02:55:03,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1882, PETRI_PLACES=143, PETRI_TRANSITIONS=195} [2024-06-28 02:55:03,850 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 87 predicate places. [2024-06-28 02:55:03,850 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 195 transitions, 1882 flow [2024-06-28 02:55:03,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:03,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:03,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:03,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 02:55:03,851 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:55:03,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:03,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1392988312, now seen corresponding path program 1 times [2024-06-28 02:55:03,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:03,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027860780] [2024-06-28 02:55:03,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:03,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:04,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:04,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027860780] [2024-06-28 02:55:04,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027860780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:04,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:04,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:55:04,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547442199] [2024-06-28 02:55:04,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:04,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:55:04,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:04,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:55:04,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:55:04,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-28 02:55:04,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 195 transitions, 1882 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:04,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:04,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-28 02:55:04,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:06,870 INFO L124 PetriNetUnfolderBase]: 10626/15249 cut-off events. [2024-06-28 02:55:06,871 INFO L125 PetriNetUnfolderBase]: For 523331/523331 co-relation queries the response was YES. [2024-06-28 02:55:06,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96721 conditions, 15249 events. 10626/15249 cut-off events. For 523331/523331 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 89044 event pairs, 4188 based on Foata normal form. 4/15208 useless extension candidates. Maximal degree in co-relation 96663. Up to 14417 conditions per place. [2024-06-28 02:55:07,050 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 194 selfloop transitions, 31 changer transitions 0/233 dead transitions. [2024-06-28 02:55:07,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 233 transitions, 2650 flow [2024-06-28 02:55:07,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:07,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:07,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-28 02:55:07,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-28 02:55:07,052 INFO L175 Difference]: Start difference. First operand has 143 places, 195 transitions, 1882 flow. Second operand 7 states and 183 transitions. [2024-06-28 02:55:07,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 233 transitions, 2650 flow [2024-06-28 02:55:07,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 233 transitions, 2560 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-28 02:55:07,498 INFO L231 Difference]: Finished difference. Result has 147 places, 203 transitions, 1999 flow [2024-06-28 02:55:07,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1999, PETRI_PLACES=147, PETRI_TRANSITIONS=203} [2024-06-28 02:55:07,499 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-06-28 02:55:07,499 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 203 transitions, 1999 flow [2024-06-28 02:55:07,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:07,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:07,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:07,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 02:55:07,499 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:55:07,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:07,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1869303660, now seen corresponding path program 2 times [2024-06-28 02:55:07,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:07,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713612807] [2024-06-28 02:55:07,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:07,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:08,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:08,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713612807] [2024-06-28 02:55:08,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713612807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:08,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:08,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:55:08,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977721990] [2024-06-28 02:55:08,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:08,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:55:08,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:08,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:55:08,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:55:08,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-28 02:55:08,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 203 transitions, 1999 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:08,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:08,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-28 02:55:08,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:10,545 INFO L124 PetriNetUnfolderBase]: 10658/15299 cut-off events. [2024-06-28 02:55:10,545 INFO L125 PetriNetUnfolderBase]: For 558439/558444 co-relation queries the response was YES. [2024-06-28 02:55:10,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99569 conditions, 15299 events. 10658/15299 cut-off events. For 558439/558444 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 89358 event pairs, 4163 based on Foata normal form. 8/15268 useless extension candidates. Maximal degree in co-relation 99509. Up to 14446 conditions per place. [2024-06-28 02:55:10,738 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 189 selfloop transitions, 36 changer transitions 0/233 dead transitions. [2024-06-28 02:55:10,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 233 transitions, 2703 flow [2024-06-28 02:55:10,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:10,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:10,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-28 02:55:10,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-28 02:55:10,740 INFO L175 Difference]: Start difference. First operand has 147 places, 203 transitions, 1999 flow. Second operand 7 states and 178 transitions. [2024-06-28 02:55:10,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 233 transitions, 2703 flow [2024-06-28 02:55:11,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 233 transitions, 2619 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-28 02:55:11,229 INFO L231 Difference]: Finished difference. Result has 151 places, 207 transitions, 2066 flow [2024-06-28 02:55:11,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2066, PETRI_PLACES=151, PETRI_TRANSITIONS=207} [2024-06-28 02:55:11,230 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 95 predicate places. [2024-06-28 02:55:11,230 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 207 transitions, 2066 flow [2024-06-28 02:55:11,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:11,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:11,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:11,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 02:55:11,231 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:55:11,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:11,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1570119646, now seen corresponding path program 3 times [2024-06-28 02:55:11,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:11,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752015207] [2024-06-28 02:55:11,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:11,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:12,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:12,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:12,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752015207] [2024-06-28 02:55:12,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752015207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:12,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:12,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:55:12,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984833233] [2024-06-28 02:55:12,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:12,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:55:12,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:12,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:55:12,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:55:12,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-28 02:55:12,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 207 transitions, 2066 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:12,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:12,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-28 02:55:12,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:14,532 INFO L124 PetriNetUnfolderBase]: 10651/15287 cut-off events. [2024-06-28 02:55:14,532 INFO L125 PetriNetUnfolderBase]: For 586376/586378 co-relation queries the response was YES. [2024-06-28 02:55:14,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100473 conditions, 15287 events. 10651/15287 cut-off events. For 586376/586378 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 89455 event pairs, 4210 based on Foata normal form. 2/15248 useless extension candidates. Maximal degree in co-relation 100411. Up to 14478 conditions per place. [2024-06-28 02:55:14,703 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 186 selfloop transitions, 35 changer transitions 0/229 dead transitions. [2024-06-28 02:55:14,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 229 transitions, 2564 flow [2024-06-28 02:55:14,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-28 02:55:14,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-28 02:55:14,704 INFO L175 Difference]: Start difference. First operand has 151 places, 207 transitions, 2066 flow. Second operand 7 states and 175 transitions. [2024-06-28 02:55:14,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 229 transitions, 2564 flow [2024-06-28 02:55:15,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 229 transitions, 2412 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-28 02:55:15,202 INFO L231 Difference]: Finished difference. Result has 154 places, 207 transitions, 1993 flow [2024-06-28 02:55:15,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1914, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1993, PETRI_PLACES=154, PETRI_TRANSITIONS=207} [2024-06-28 02:55:15,203 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-28 02:55:15,203 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 207 transitions, 1993 flow [2024-06-28 02:55:15,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:15,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:15,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:15,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 02:55:15,204 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:55:15,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:15,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1570119832, now seen corresponding path program 3 times [2024-06-28 02:55:15,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:15,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724141207] [2024-06-28 02:55:15,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:15,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:16,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:16,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724141207] [2024-06-28 02:55:16,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724141207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:16,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:16,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:55:16,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764427706] [2024-06-28 02:55:16,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:16,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:55:16,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:16,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:55:16,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:55:16,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-28 02:55:16,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 207 transitions, 1993 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:16,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:16,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-28 02:55:16,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:18,906 INFO L124 PetriNetUnfolderBase]: 10637/15254 cut-off events. [2024-06-28 02:55:18,906 INFO L125 PetriNetUnfolderBase]: For 613789/613794 co-relation queries the response was YES. [2024-06-28 02:55:18,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100914 conditions, 15254 events. 10637/15254 cut-off events. For 613789/613794 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 88855 event pairs, 4161 based on Foata normal form. 8/15223 useless extension candidates. Maximal degree in co-relation 100851. Up to 14425 conditions per place. [2024-06-28 02:55:19,078 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 189 selfloop transitions, 35 changer transitions 0/232 dead transitions. [2024-06-28 02:55:19,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 232 transitions, 2503 flow [2024-06-28 02:55:19,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:19,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-28 02:55:19,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-28 02:55:19,087 INFO L175 Difference]: Start difference. First operand has 154 places, 207 transitions, 1993 flow. Second operand 7 states and 178 transitions. [2024-06-28 02:55:19,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 232 transitions, 2503 flow [2024-06-28 02:55:19,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 232 transitions, 2363 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-28 02:55:19,651 INFO L231 Difference]: Finished difference. Result has 154 places, 207 transitions, 1932 flow [2024-06-28 02:55:19,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1932, PETRI_PLACES=154, PETRI_TRANSITIONS=207} [2024-06-28 02:55:19,652 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-28 02:55:19,652 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 207 transitions, 1932 flow [2024-06-28 02:55:19,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:19,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:19,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:19,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 02:55:19,657 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:55:19,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:19,658 INFO L85 PathProgramCache]: Analyzing trace with hash 497354746, now seen corresponding path program 1 times [2024-06-28 02:55:19,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:19,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588792573] [2024-06-28 02:55:19,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:19,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:20,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:20,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588792573] [2024-06-28 02:55:20,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588792573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:20,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:20,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:55:20,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395921722] [2024-06-28 02:55:20,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:20,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:55:20,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:20,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:55:20,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:55:20,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-28 02:55:20,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 207 transitions, 1932 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) [2024-06-28 02:55:20,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:20,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-28 02:55:20,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:22,796 INFO L124 PetriNetUnfolderBase]: 9890/14502 cut-off events. [2024-06-28 02:55:22,797 INFO L125 PetriNetUnfolderBase]: For 648858/649182 co-relation queries the response was YES. [2024-06-28 02:55:22,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98476 conditions, 14502 events. 9890/14502 cut-off events. For 648858/649182 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 88453 event pairs, 3745 based on Foata normal form. 1/14243 useless extension candidates. Maximal degree in co-relation 98413. Up to 13170 conditions per place. [2024-06-28 02:55:22,972 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 175 selfloop transitions, 10 changer transitions 0/222 dead transitions. [2024-06-28 02:55:22,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 222 transitions, 2388 flow [2024-06-28 02:55:22,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:55:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:55:22,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-28 02:55:22,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49433962264150944 [2024-06-28 02:55:22,974 INFO L175 Difference]: Start difference. First operand has 154 places, 207 transitions, 1932 flow. Second operand 5 states and 131 transitions. [2024-06-28 02:55:22,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 222 transitions, 2388 flow [2024-06-28 02:55:23,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 222 transitions, 2290 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 02:55:23,539 INFO L231 Difference]: Finished difference. Result has 152 places, 211 transitions, 1927 flow [2024-06-28 02:55:23,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1834, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1927, PETRI_PLACES=152, PETRI_TRANSITIONS=211} [2024-06-28 02:55:23,540 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 96 predicate places. [2024-06-28 02:55:23,540 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 211 transitions, 1927 flow [2024-06-28 02:55:23,540 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) [2024-06-28 02:55:23,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:23,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:23,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 02:55:23,541 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:55:23,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:23,541 INFO L85 PathProgramCache]: Analyzing trace with hash -978129268, now seen corresponding path program 1 times [2024-06-28 02:55:23,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:23,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034722631] [2024-06-28 02:55:23,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:23,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:24,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:24,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034722631] [2024-06-28 02:55:24,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034722631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:24,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:24,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:55:24,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321329041] [2024-06-28 02:55:24,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:24,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:55:24,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:24,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:55:24,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:55:24,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:55:24,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 211 transitions, 1927 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:24,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:24,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:55:24,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:27,773 INFO L124 PetriNetUnfolderBase]: 12138/16927 cut-off events. [2024-06-28 02:55:27,773 INFO L125 PetriNetUnfolderBase]: For 791719/791724 co-relation queries the response was YES. [2024-06-28 02:55:27,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118208 conditions, 16927 events. 12138/16927 cut-off events. For 791719/791724 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 94773 event pairs, 4791 based on Foata normal form. 12/16930 useless extension candidates. Maximal degree in co-relation 118144. Up to 15798 conditions per place. [2024-06-28 02:55:27,970 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 172 selfloop transitions, 93 changer transitions 0/272 dead transitions. [2024-06-28 02:55:27,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 272 transitions, 3073 flow [2024-06-28 02:55:27,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:55:27,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:55:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-28 02:55:27,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141509433962265 [2024-06-28 02:55:27,973 INFO L175 Difference]: Start difference. First operand has 152 places, 211 transitions, 1927 flow. Second operand 8 states and 218 transitions. [2024-06-28 02:55:27,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 272 transitions, 3073 flow [2024-06-28 02:55:28,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 272 transitions, 3008 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-28 02:55:28,522 INFO L231 Difference]: Finished difference. Result has 158 places, 226 transitions, 2354 flow [2024-06-28 02:55:28,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2354, PETRI_PLACES=158, PETRI_TRANSITIONS=226} [2024-06-28 02:55:28,523 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 102 predicate places. [2024-06-28 02:55:28,523 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 226 transitions, 2354 flow [2024-06-28 02:55:28,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:28,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:28,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:28,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 02:55:28,524 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:55:28,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:28,525 INFO L85 PathProgramCache]: Analyzing trace with hash 234697759, now seen corresponding path program 1 times [2024-06-28 02:55:28,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:28,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887054010] [2024-06-28 02:55:28,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:28,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:29,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:29,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887054010] [2024-06-28 02:55:29,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887054010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:29,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:29,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:55:29,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504728401] [2024-06-28 02:55:29,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:29,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:55:29,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:29,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:55:29,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:55:29,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:55:29,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 226 transitions, 2354 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:29,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:29,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:55:29,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:32,194 INFO L124 PetriNetUnfolderBase]: 12216/17027 cut-off events. [2024-06-28 02:55:32,194 INFO L125 PetriNetUnfolderBase]: For 854238/854246 co-relation queries the response was YES. [2024-06-28 02:55:32,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124889 conditions, 17027 events. 12216/17027 cut-off events. For 854238/854246 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 95362 event pairs, 4887 based on Foata normal form. 10/17031 useless extension candidates. Maximal degree in co-relation 124823. Up to 16289 conditions per place. [2024-06-28 02:55:32,529 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 194 selfloop transitions, 73 changer transitions 0/274 dead transitions. [2024-06-28 02:55:32,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 274 transitions, 3456 flow [2024-06-28 02:55:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:32,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:32,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-28 02:55:32,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013477088948787 [2024-06-28 02:55:32,531 INFO L175 Difference]: Start difference. First operand has 158 places, 226 transitions, 2354 flow. Second operand 7 states and 186 transitions. [2024-06-28 02:55:32,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 274 transitions, 3456 flow [2024-06-28 02:55:32,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 274 transitions, 3313 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-28 02:55:32,966 INFO L231 Difference]: Finished difference. Result has 163 places, 239 transitions, 2597 flow [2024-06-28 02:55:32,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2211, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2597, PETRI_PLACES=163, PETRI_TRANSITIONS=239} [2024-06-28 02:55:32,967 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 107 predicate places. [2024-06-28 02:55:32,968 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 239 transitions, 2597 flow [2024-06-28 02:55:32,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:32,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:32,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:32,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 02:55:32,968 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:55:32,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:32,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1852295321, now seen corresponding path program 2 times [2024-06-28 02:55:32,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:32,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076431591] [2024-06-28 02:55:32,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:32,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:33,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:33,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076431591] [2024-06-28 02:55:33,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076431591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:33,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:33,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:55:33,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073673828] [2024-06-28 02:55:33,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:33,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:55:33,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:33,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:55:33,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:55:34,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:55:34,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 239 transitions, 2597 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:34,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:34,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:55:34,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:36,841 INFO L124 PetriNetUnfolderBase]: 12202/17009 cut-off events. [2024-06-28 02:55:36,841 INFO L125 PetriNetUnfolderBase]: For 884837/884845 co-relation queries the response was YES. [2024-06-28 02:55:36,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125150 conditions, 17009 events. 12202/17009 cut-off events. For 884837/884845 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 95209 event pairs, 4887 based on Foata normal form. 10/17013 useless extension candidates. Maximal degree in co-relation 125081. Up to 16277 conditions per place. [2024-06-28 02:55:37,236 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 195 selfloop transitions, 69 changer transitions 0/271 dead transitions. [2024-06-28 02:55:37,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 271 transitions, 3489 flow [2024-06-28 02:55:37,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:55:37,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:55:37,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-28 02:55:37,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-28 02:55:37,238 INFO L175 Difference]: Start difference. First operand has 163 places, 239 transitions, 2597 flow. Second operand 7 states and 183 transitions. [2024-06-28 02:55:37,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 271 transitions, 3489 flow [2024-06-28 02:55:37,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 271 transitions, 3363 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 02:55:37,802 INFO L231 Difference]: Finished difference. Result has 166 places, 239 transitions, 2621 flow [2024-06-28 02:55:37,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2471, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2621, PETRI_PLACES=166, PETRI_TRANSITIONS=239} [2024-06-28 02:55:37,803 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 110 predicate places. [2024-06-28 02:55:37,803 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 239 transitions, 2621 flow [2024-06-28 02:55:37,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:37,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:37,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:37,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 02:55:37,804 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:55:37,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:37,804 INFO L85 PathProgramCache]: Analyzing trace with hash -968863678, now seen corresponding path program 2 times [2024-06-28 02:55:37,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:37,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557370124] [2024-06-28 02:55:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:37,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:38,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:38,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557370124] [2024-06-28 02:55:38,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557370124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:38,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:38,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:55:38,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444955825] [2024-06-28 02:55:38,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:38,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:55:38,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:38,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:55:38,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:55:38,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:55:38,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 239 transitions, 2621 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:38,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:38,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:55:38,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:42,310 INFO L124 PetriNetUnfolderBase]: 12460/17382 cut-off events. [2024-06-28 02:55:42,310 INFO L125 PetriNetUnfolderBase]: For 942595/942600 co-relation queries the response was YES. [2024-06-28 02:55:42,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128822 conditions, 17382 events. 12460/17382 cut-off events. For 942595/942600 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 97421 event pairs, 4801 based on Foata normal form. 12/17385 useless extension candidates. Maximal degree in co-relation 128753. Up to 16025 conditions per place. [2024-06-28 02:55:42,478 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 183 selfloop transitions, 106 changer transitions 0/296 dead transitions. [2024-06-28 02:55:42,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 296 transitions, 3954 flow [2024-06-28 02:55:42,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:55:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:55:42,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-28 02:55:42,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-28 02:55:42,483 INFO L175 Difference]: Start difference. First operand has 166 places, 239 transitions, 2621 flow. Second operand 8 states and 214 transitions. [2024-06-28 02:55:42,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 296 transitions, 3954 flow [2024-06-28 02:55:43,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 296 transitions, 3827 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 02:55:43,158 INFO L231 Difference]: Finished difference. Result has 171 places, 253 transitions, 2938 flow [2024-06-28 02:55:43,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2494, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2938, PETRI_PLACES=171, PETRI_TRANSITIONS=253} [2024-06-28 02:55:43,160 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 115 predicate places. [2024-06-28 02:55:43,160 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 253 transitions, 2938 flow [2024-06-28 02:55:43,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:43,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:43,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:43,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 02:55:43,161 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:55:43,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:43,161 INFO L85 PathProgramCache]: Analyzing trace with hash -968874838, now seen corresponding path program 3 times [2024-06-28 02:55:43,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:43,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131864149] [2024-06-28 02:55:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:43,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:44,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:44,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131864149] [2024-06-28 02:55:44,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131864149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:44,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:44,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:55:44,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095187228] [2024-06-28 02:55:44,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:44,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:55:44,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:44,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:55:44,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:55:44,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:55:44,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 253 transitions, 2938 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:44,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:44,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:55:44,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:55:47,599 INFO L124 PetriNetUnfolderBase]: 12442/17368 cut-off events. [2024-06-28 02:55:47,599 INFO L125 PetriNetUnfolderBase]: For 981877/981882 co-relation queries the response was YES. [2024-06-28 02:55:47,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130341 conditions, 17368 events. 12442/17368 cut-off events. For 981877/981882 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 97482 event pairs, 4795 based on Foata normal form. 12/17371 useless extension candidates. Maximal degree in co-relation 130270. Up to 16017 conditions per place. [2024-06-28 02:55:47,798 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 181 selfloop transitions, 107 changer transitions 0/295 dead transitions. [2024-06-28 02:55:47,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 295 transitions, 3937 flow [2024-06-28 02:55:47,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:55:47,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:55:47,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-28 02:55:47,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-28 02:55:47,800 INFO L175 Difference]: Start difference. First operand has 171 places, 253 transitions, 2938 flow. Second operand 8 states and 214 transitions. [2024-06-28 02:55:47,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 295 transitions, 3937 flow [2024-06-28 02:55:48,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 295 transitions, 3730 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-28 02:55:48,631 INFO L231 Difference]: Finished difference. Result has 175 places, 254 transitions, 2980 flow [2024-06-28 02:55:48,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2731, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2980, PETRI_PLACES=175, PETRI_TRANSITIONS=254} [2024-06-28 02:55:48,641 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 119 predicate places. [2024-06-28 02:55:48,641 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 254 transitions, 2980 flow [2024-06-28 02:55:48,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:48,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:55:48,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:55:48,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 02:55:48,642 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:55:48,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:55:48,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1333746719, now seen corresponding path program 3 times [2024-06-28 02:55:48,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:55:48,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248856551] [2024-06-28 02:55:48,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:55:48,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:55:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:55:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:55:49,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:55:49,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248856551] [2024-06-28 02:55:49,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248856551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:55:49,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:55:49,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:55:49,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274651675] [2024-06-28 02:55:49,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:55:49,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:55:49,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:55:49,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:55:49,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:55:49,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-28 02:55:49,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 254 transitions, 2980 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:55:49,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:55:49,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-28 02:55:49,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand