./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix036_pso.opt_tso.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/mix036_pso.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/mix036_pso.opt_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix036_pso.opt_tso.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-eb4cb34-m [2024-06-21 21:03:23,463 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:03:23,527 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:03:23,532 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:03:23,532 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:03:23,556 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:03:23,556 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:03:23,556 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:03:23,557 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:03:23,560 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:03:23,560 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:03:23,561 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:03:23,561 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:03:23,562 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:03:23,562 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:03:23,563 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:03:23,563 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:03:23,563 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:03:23,563 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:03:23,564 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:03:23,564 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:03:23,564 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:03:23,564 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:03:23,565 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:03:23,565 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:03:23,565 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:03:23,565 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:03:23,565 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:03:23,566 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:03:23,566 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:03:23,567 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:03:23,567 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:03:23,567 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:03:23,567 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:03:23,568 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:03:23,568 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:03:23,568 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:03:23,568 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:03:23,568 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:03:23,568 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:03:23,569 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:03:23,569 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:03:23,569 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:03:23,569 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:03:23,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:03:23,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:03:23,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:03:23,810 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:03:23,810 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:03:23,811 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix036_pso.opt_tso.opt.i [2024-06-21 21:03:24,879 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:03:25,101 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:03:25,101 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix036_pso.opt_tso.opt.i [2024-06-21 21:03:25,113 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/918e49c29/e0f2bb386c464cf9b341b8d04e534295/FLAG74536fff9 [2024-06-21 21:03:25,123 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/918e49c29/e0f2bb386c464cf9b341b8d04e534295 [2024-06-21 21:03:25,125 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:03:25,125 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:03:25,126 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix036_pso.opt_tso.opt.yml/witness.yml [2024-06-21 21:03:25,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:03:25,288 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:03:25,289 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:03:25,289 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:03:25,292 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:03:25,293 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:03:25" (1/2) ... [2024-06-21 21:03:25,293 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@570327b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:03:25, skipping insertion in model container [2024-06-21 21:03:25,294 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:03:25" (1/2) ... [2024-06-21 21:03:25,295 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5e886a8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:03:25, skipping insertion in model container [2024-06-21 21:03:25,295 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:03:25" (2/2) ... [2024-06-21 21:03:25,295 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@570327b1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:03:25, skipping insertion in model container [2024-06-21 21:03:25,295 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:03:25" (2/2) ... [2024-06-21 21:03:25,295 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:03:25,387 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:03:25,388 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] ((((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! 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$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1)) [2024-06-21 21:03:25,389 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || ((((((((((((((((((((((((0 <= __unbuffered_cnt && z$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_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (x == 0 || x == 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)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1)) [2024-06-21 21:03:25,389 INFO L97 edCorrectnessWitness]: Location invariant before [L865-L865] ((((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! 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$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1)) [2024-06-21 21:03:25,389 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] ((((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || ((((((((((((((((((((((((0 <= __unbuffered_cnt && z$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_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (x == 0 || x == 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)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1)) [2024-06-21 21:03:25,389 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:03:25,390 INFO L106 edCorrectnessWitness]: ghost_update [L859-L859] multithreaded = 1; [2024-06-21 21:03:25,427 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:03:25,705 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:03:25,729 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:03:25,882 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:03:25,924 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:03:25,925 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:03:25 WrapperNode [2024-06-21 21:03:25,925 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:03:25,926 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:03:25,926 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:03:25,927 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:03:25,933 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:03:25" (1/1) ... [2024-06-21 21:03:25,971 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:03:25" (1/1) ... [2024-06-21 21:03:25,998 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 147 [2024-06-21 21:03:25,998 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:03:25,999 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:03:25,999 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:03:25,999 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:03:26,015 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:03:25" (1/1) ... [2024-06-21 21:03:26,016 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:03:25" (1/1) ... [2024-06-21 21:03:26,019 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:03:25" (1/1) ... [2024-06-21 21:03:26,046 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]. [2024-06-21 21:03:26,046 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:03:25" (1/1) ... [2024-06-21 21:03:26,046 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:03:25" (1/1) ... [2024-06-21 21:03:26,055 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:03:25" (1/1) ... [2024-06-21 21:03:26,056 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:03:25" (1/1) ... [2024-06-21 21:03:26,058 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:03:25" (1/1) ... [2024-06-21 21:03:26,059 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:03:25" (1/1) ... [2024-06-21 21:03:26,062 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:03:26,063 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:03:26,063 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:03:26,063 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:03:26,063 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:03:25" (1/1) ... [2024-06-21 21:03:26,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:03:26,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:03:26,084 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) [2024-06-21 21:03:26,111 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 [2024-06-21 21:03:26,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:03:26,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:03:26,122 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:03:26,122 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:03:26,123 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:03:26,123 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:03:26,123 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:03:26,123 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:03:26,123 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 21:03:26,123 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 21:03:26,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:03:26,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:03:26,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:03:26,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:03:26,125 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:03:26,229 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:03:26,231 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:03:26,624 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:03:26,624 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:03:26,740 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:03:26,741 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:03:26,741 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:03:26 BoogieIcfgContainer [2024-06-21 21:03:26,741 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:03:26,742 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:03:26,743 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:03:26,745 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:03:26,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:03:25" (1/4) ... [2024-06-21 21:03:26,746 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4345c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:03:26, skipping insertion in model container [2024-06-21 21:03:26,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:03:25" (2/4) ... [2024-06-21 21:03:26,746 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4345c4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:03:26, skipping insertion in model container [2024-06-21 21:03:26,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:03:25" (3/4) ... [2024-06-21 21:03:26,746 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4345c4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:03:26, skipping insertion in model container [2024-06-21 21:03:26,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:03:26" (4/4) ... [2024-06-21 21:03:26,747 INFO L112 eAbstractionObserver]: Analyzing ICFG mix036_pso.opt_tso.opt.i [2024-06-21 21:03:26,761 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:03:26,761 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 21:03:26,761 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:03:26,797 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:03:26,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 21:03:26,845 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-21 21:03:26,845 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:03:26,847 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 83 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. [2024-06-21 21:03:26,848 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 21:03:26,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-21 21:03:26,865 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:03:26,872 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;@6a9e7bd2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:03:26,872 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 21:03:26,876 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:03:26,876 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:03:26,876 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:03:26,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:26,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:03:26,877 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)] === [2024-06-21 21:03:26,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:26,881 INFO L85 PathProgramCache]: Analyzing trace with hash 382402826, now seen corresponding path program 1 times [2024-06-21 21:03:26,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:26,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792711776] [2024-06-21 21:03:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:26,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:27,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:27,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792711776] [2024-06-21 21:03:27,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792711776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:27,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:27,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:03:27,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691227867] [2024-06-21 21:03:27,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:27,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:03:27,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:27,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:03:27,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:03:27,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-06-21 21:03:27,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:27,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:27,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-06-21 21:03:27,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:28,699 INFO L124 PetriNetUnfolderBase]: 4867/7159 cut-off events. [2024-06-21 21:03:28,700 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-06-21 21:03:28,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14071 conditions, 7159 events. 4867/7159 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 42140 event pairs, 3534 based on Foata normal form. 1/6926 useless extension candidates. Maximal degree in co-relation 14058. Up to 6693 conditions per place. [2024-06-21 21:03:28,743 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 40 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-21 21:03:28,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 225 flow [2024-06-21 21:03:28,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:03:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:03:28,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-06-21 21:03:28,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 21:03:28,754 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 106 transitions. [2024-06-21 21:03:28,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 225 flow [2024-06-21 21:03:28,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 218 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 21:03:28,760 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-21 21:03:28,761 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} [2024-06-21 21:03:28,764 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-21 21:03:28,764 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-21 21:03:28,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:28,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:28,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:28,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:03:28,765 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)] === [2024-06-21 21:03:28,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:28,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1877631283, now seen corresponding path program 1 times [2024-06-21 21:03:28,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:28,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564897154] [2024-06-21 21:03:28,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:28,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:29,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:29,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:29,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564897154] [2024-06-21 21:03:29,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564897154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:29,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:29,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:03:29,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447818954] [2024-06-21 21:03:29,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:29,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:03:29,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:29,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:03:29,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:03:29,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-06-21 21:03:29,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:29,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:29,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-06-21 21:03:29,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:30,215 INFO L124 PetriNetUnfolderBase]: 5569/7957 cut-off events. [2024-06-21 21:03:30,215 INFO L125 PetriNetUnfolderBase]: For 1662/1662 co-relation queries the response was YES. [2024-06-21 21:03:30,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18144 conditions, 7957 events. 5569/7957 cut-off events. For 1662/1662 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 45772 event pairs, 3437 based on Foata normal form. 4/7838 useless extension candidates. Maximal degree in co-relation 18132. Up to 7610 conditions per place. [2024-06-21 21:03:30,262 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 51 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-21 21:03:30,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 319 flow [2024-06-21 21:03:30,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:03:30,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:03:30,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-06-21 21:03:30,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6415094339622641 [2024-06-21 21:03:30,268 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 136 transitions. [2024-06-21 21:03:30,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 319 flow [2024-06-21 21:03:30,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:03:30,271 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-21 21:03:30,272 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} [2024-06-21 21:03:30,272 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-21 21:03:30,273 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-21 21:03:30,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:30,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:30,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:30,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:03:30,276 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)] === [2024-06-21 21:03:30,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:30,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1141713804, now seen corresponding path program 1 times [2024-06-21 21:03:30,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:30,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706414790] [2024-06-21 21:03:30,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:30,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:31,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:31,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706414790] [2024-06-21 21:03:31,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706414790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:31,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:31,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:03:31,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330539192] [2024-06-21 21:03:31,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:31,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:03:31,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:31,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:03:31,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:03:31,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-21 21:03:31,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 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) [2024-06-21 21:03:31,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:31,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-21 21:03:31,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:32,196 INFO L124 PetriNetUnfolderBase]: 7070/10028 cut-off events. [2024-06-21 21:03:32,196 INFO L125 PetriNetUnfolderBase]: For 5698/5698 co-relation queries the response was YES. [2024-06-21 21:03:32,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25462 conditions, 10028 events. 7070/10028 cut-off events. For 5698/5698 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 57245 event pairs, 3323 based on Foata normal form. 8/9880 useless extension candidates. Maximal degree in co-relation 25448. Up to 9556 conditions per place. [2024-06-21 21:03:32,246 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 69 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-21 21:03:32,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 484 flow [2024-06-21 21:03:32,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:03:32,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:03:32,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-21 21:03:32,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60062893081761 [2024-06-21 21:03:32,259 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 191 transitions. [2024-06-21 21:03:32,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 484 flow [2024-06-21 21:03:32,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 456 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 21:03:32,262 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 243 flow [2024-06-21 21:03:32,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-21 21:03:32,262 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-21 21:03:32,263 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 243 flow [2024-06-21 21:03:32,263 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) [2024-06-21 21:03:32,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:32,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:32,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:03:32,263 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:03:32,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:32,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1344921504, now seen corresponding path program 1 times [2024-06-21 21:03:32,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:32,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677799625] [2024-06-21 21:03:32,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:32,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:33,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:33,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677799625] [2024-06-21 21:03:33,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677799625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:33,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:33,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:03:33,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092277615] [2024-06-21 21:03:33,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:33,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:03:33,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:33,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:03:33,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:03:33,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-21 21:03:33,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 243 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) [2024-06-21 21:03:33,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:33,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-21 21:03:33,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:34,354 INFO L124 PetriNetUnfolderBase]: 6156/9048 cut-off events. [2024-06-21 21:03:34,355 INFO L125 PetriNetUnfolderBase]: For 9447/9447 co-relation queries the response was YES. [2024-06-21 21:03:34,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25090 conditions, 9048 events. 6156/9048 cut-off events. For 9447/9447 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 53517 event pairs, 3157 based on Foata normal form. 3/8932 useless extension candidates. Maximal degree in co-relation 25073. Up to 8408 conditions per place. [2024-06-21 21:03:34,400 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 58 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-21 21:03:34,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 445 flow [2024-06-21 21:03:34,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:03:34,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:03:34,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-21 21:03:34,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-21 21:03:34,403 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 243 flow. Second operand 5 states and 140 transitions. [2024-06-21 21:03:34,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 445 flow [2024-06-21 21:03:34,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 407 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 21:03:34,410 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 266 flow [2024-06-21 21:03:34,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-21 21:03:34,411 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-21 21:03:34,411 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 266 flow [2024-06-21 21:03:34,412 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) [2024-06-21 21:03:34,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:34,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:34,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:03:34,412 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)] === [2024-06-21 21:03:34,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:34,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1069311275, now seen corresponding path program 1 times [2024-06-21 21:03:34,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:34,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739686706] [2024-06-21 21:03:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:34,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:35,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:35,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739686706] [2024-06-21 21:03:35,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739686706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:35,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:35,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:03:35,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143191270] [2024-06-21 21:03:35,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:35,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:03:35,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:35,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:03:35,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:03:35,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:03:35,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 266 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) [2024-06-21 21:03:35,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:35,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:03:35,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:36,596 INFO L124 PetriNetUnfolderBase]: 7083/10066 cut-off events. [2024-06-21 21:03:36,596 INFO L125 PetriNetUnfolderBase]: For 16755/16777 co-relation queries the response was YES. [2024-06-21 21:03:36,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30874 conditions, 10066 events. 7083/10066 cut-off events. For 16755/16777 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 57524 event pairs, 3533 based on Foata normal form. 5/9952 useless extension candidates. Maximal degree in co-relation 30855. Up to 9589 conditions per place. [2024-06-21 21:03:36,642 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 69 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-21 21:03:36,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 99 transitions, 602 flow [2024-06-21 21:03:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:03:36,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:03:36,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-21 21:03:36,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345911949685535 [2024-06-21 21:03:36,647 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 266 flow. Second operand 6 states and 170 transitions. [2024-06-21 21:03:36,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 99 transitions, 602 flow [2024-06-21 21:03:36,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 99 transitions, 573 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 21:03:36,653 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 354 flow [2024-06-21 21:03:36,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-21 21:03:36,656 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-06-21 21:03:36,656 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 354 flow [2024-06-21 21:03:36,657 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) [2024-06-21 21:03:36,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:36,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:36,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:03:36,657 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)] === [2024-06-21 21:03:36,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:36,658 INFO L85 PathProgramCache]: Analyzing trace with hash -290520905, now seen corresponding path program 2 times [2024-06-21 21:03:36,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:36,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741963264] [2024-06-21 21:03:36,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:36,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:37,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:37,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741963264] [2024-06-21 21:03:37,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741963264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:37,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:37,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:03:37,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708633368] [2024-06-21 21:03:37,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:37,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:03:37,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:37,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:03:37,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:03:37,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:03:37,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 354 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) [2024-06-21 21:03:37,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:37,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:03:37,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:38,869 INFO L124 PetriNetUnfolderBase]: 7074/10069 cut-off events. [2024-06-21 21:03:38,869 INFO L125 PetriNetUnfolderBase]: For 24671/24712 co-relation queries the response was YES. [2024-06-21 21:03:38,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33548 conditions, 10069 events. 7074/10069 cut-off events. For 24671/24712 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 57360 event pairs, 3536 based on Foata normal form. 25/9976 useless extension candidates. Maximal degree in co-relation 33528. Up to 9580 conditions per place. [2024-06-21 21:03:38,930 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 63 selfloop transitions, 21 changer transitions 0/93 dead transitions. [2024-06-21 21:03:38,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 93 transitions, 584 flow [2024-06-21 21:03:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:03:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:03:38,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-21 21:03:38,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5157232704402516 [2024-06-21 21:03:38,932 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 354 flow. Second operand 6 states and 164 transitions. [2024-06-21 21:03:38,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 93 transitions, 584 flow [2024-06-21 21:03:38,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 538 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 21:03:38,942 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 361 flow [2024-06-21 21:03:38,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-06-21 21:03:38,945 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-21 21:03:38,946 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 361 flow [2024-06-21 21:03:38,946 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) [2024-06-21 21:03:38,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:38,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:38,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:03:38,947 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)] === [2024-06-21 21:03:38,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:38,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1527713679, now seen corresponding path program 1 times [2024-06-21 21:03:38,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:38,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973642952] [2024-06-21 21:03:38,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:38,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:39,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:39,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973642952] [2024-06-21 21:03:39,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973642952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:39,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:39,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:03:39,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868552698] [2024-06-21 21:03:39,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:39,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:03:39,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:39,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:03:39,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:03:40,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:03:40,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 361 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) [2024-06-21 21:03:40,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:40,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:03:40,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:41,179 INFO L124 PetriNetUnfolderBase]: 7165/10223 cut-off events. [2024-06-21 21:03:41,180 INFO L125 PetriNetUnfolderBase]: For 28403/28441 co-relation queries the response was YES. [2024-06-21 21:03:41,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34438 conditions, 10223 events. 7165/10223 cut-off events. For 28403/28441 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 58444 event pairs, 3526 based on Foata normal form. 7/10113 useless extension candidates. Maximal degree in co-relation 34416. Up to 9682 conditions per place. [2024-06-21 21:03:41,235 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 87 selfloop transitions, 32 changer transitions 0/128 dead transitions. [2024-06-21 21:03:41,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 128 transitions, 820 flow [2024-06-21 21:03:41,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:03:41,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:03:41,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-21 21:03:41,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212264150943396 [2024-06-21 21:03:41,236 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 361 flow. Second operand 8 states and 221 transitions. [2024-06-21 21:03:41,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 128 transitions, 820 flow [2024-06-21 21:03:41,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 128 transitions, 746 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:03:41,250 INFO L231 Difference]: Finished difference. Result has 75 places, 88 transitions, 513 flow [2024-06-21 21:03:41,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=513, PETRI_PLACES=75, PETRI_TRANSITIONS=88} [2024-06-21 21:03:41,251 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-06-21 21:03:41,251 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 88 transitions, 513 flow [2024-06-21 21:03:41,251 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) [2024-06-21 21:03:41,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:41,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:41,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:03:41,252 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)] === [2024-06-21 21:03:41,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:41,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1383478193, now seen corresponding path program 2 times [2024-06-21 21:03:41,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:41,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967920374] [2024-06-21 21:03:41,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:41,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:42,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:42,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967920374] [2024-06-21 21:03:42,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967920374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:42,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:42,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:03:42,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663396020] [2024-06-21 21:03:42,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:42,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:03:42,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:42,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:03:42,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:03:42,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:03:42,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 88 transitions, 513 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) [2024-06-21 21:03:42,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:42,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:03:42,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:43,549 INFO L124 PetriNetUnfolderBase]: 7187/10246 cut-off events. [2024-06-21 21:03:43,549 INFO L125 PetriNetUnfolderBase]: For 38844/38908 co-relation queries the response was YES. [2024-06-21 21:03:43,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37454 conditions, 10246 events. 7187/10246 cut-off events. For 38844/38908 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 58244 event pairs, 3508 based on Foata normal form. 11/10130 useless extension candidates. Maximal degree in co-relation 37430. Up to 9689 conditions per place. [2024-06-21 21:03:43,612 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 87 selfloop transitions, 34 changer transitions 0/130 dead transitions. [2024-06-21 21:03:43,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 130 transitions, 925 flow [2024-06-21 21:03:43,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:03:43,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:03:43,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-21 21:03:43,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522911051212938 [2024-06-21 21:03:43,614 INFO L175 Difference]: Start difference. First operand has 75 places, 88 transitions, 513 flow. Second operand 7 states and 194 transitions. [2024-06-21 21:03:43,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 130 transitions, 925 flow [2024-06-21 21:03:43,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 130 transitions, 867 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 21:03:43,629 INFO L231 Difference]: Finished difference. Result has 79 places, 92 transitions, 590 flow [2024-06-21 21:03:43,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=590, PETRI_PLACES=79, PETRI_TRANSITIONS=92} [2024-06-21 21:03:43,630 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-06-21 21:03:43,630 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 92 transitions, 590 flow [2024-06-21 21:03:43,630 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) [2024-06-21 21:03:43,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:43,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:43,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:03:43,631 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:03:43,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:43,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1211090323, now seen corresponding path program 3 times [2024-06-21 21:03:43,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:43,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832109407] [2024-06-21 21:03:43,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:43,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:44,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:44,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832109407] [2024-06-21 21:03:44,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832109407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:44,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:44,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:03:44,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833787374] [2024-06-21 21:03:44,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:44,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:03:44,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:44,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:03:44,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:03:44,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:03:44,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 92 transitions, 590 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) [2024-06-21 21:03:44,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:44,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:03:44,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:45,967 INFO L124 PetriNetUnfolderBase]: 7209/10283 cut-off events. [2024-06-21 21:03:45,967 INFO L125 PetriNetUnfolderBase]: For 50641/50699 co-relation queries the response was YES. [2024-06-21 21:03:45,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40339 conditions, 10283 events. 7209/10283 cut-off events. For 50641/50699 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 58787 event pairs, 3397 based on Foata normal form. 21/10187 useless extension candidates. Maximal degree in co-relation 40314. Up to 9633 conditions per place. [2024-06-21 21:03:46,022 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 77 selfloop transitions, 50 changer transitions 0/136 dead transitions. [2024-06-21 21:03:46,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 136 transitions, 1102 flow [2024-06-21 21:03:46,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:03:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:03:46,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-21 21:03:46,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5336927223719676 [2024-06-21 21:03:46,024 INFO L175 Difference]: Start difference. First operand has 79 places, 92 transitions, 590 flow. Second operand 7 states and 198 transitions. [2024-06-21 21:03:46,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 136 transitions, 1102 flow [2024-06-21 21:03:46,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 136 transitions, 983 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 21:03:46,049 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 696 flow [2024-06-21 21:03:46,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=696, PETRI_PLACES=81, PETRI_TRANSITIONS=100} [2024-06-21 21:03:46,050 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-21 21:03:46,050 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 696 flow [2024-06-21 21:03:46,050 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) [2024-06-21 21:03:46,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:46,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:46,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:03:46,051 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:03:46,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:46,051 INFO L85 PathProgramCache]: Analyzing trace with hash -2133651053, now seen corresponding path program 4 times [2024-06-21 21:03:46,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:46,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374602567] [2024-06-21 21:03:46,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:46,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:47,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:47,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374602567] [2024-06-21 21:03:47,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374602567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:47,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:47,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:03:47,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343203103] [2024-06-21 21:03:47,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:47,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:03:47,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:47,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:03:47,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:03:47,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:03:47,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 100 transitions, 696 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) [2024-06-21 21:03:47,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:47,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:03:47,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:48,568 INFO L124 PetriNetUnfolderBase]: 7200/10284 cut-off events. [2024-06-21 21:03:48,568 INFO L125 PetriNetUnfolderBase]: For 51614/51672 co-relation queries the response was YES. [2024-06-21 21:03:48,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40284 conditions, 10284 events. 7200/10284 cut-off events. For 51614/51672 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 58695 event pairs, 3404 based on Foata normal form. 19/10183 useless extension candidates. Maximal degree in co-relation 40258. Up to 9624 conditions per place. [2024-06-21 21:03:48,633 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 72 selfloop transitions, 50 changer transitions 0/131 dead transitions. [2024-06-21 21:03:48,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 131 transitions, 1038 flow [2024-06-21 21:03:48,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:03:48,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:03:48,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-21 21:03:48,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175202156334232 [2024-06-21 21:03:48,635 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 696 flow. Second operand 7 states and 192 transitions. [2024-06-21 21:03:48,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 131 transitions, 1038 flow [2024-06-21 21:03:48,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 131 transitions, 955 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 21:03:48,661 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 724 flow [2024-06-21 21:03:48,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=724, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-21 21:03:48,661 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-06-21 21:03:48,662 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 724 flow [2024-06-21 21:03:48,662 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) [2024-06-21 21:03:48,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:48,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:48,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:03:48,662 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)] === [2024-06-21 21:03:48,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:48,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1388468107, now seen corresponding path program 1 times [2024-06-21 21:03:48,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:48,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283383629] [2024-06-21 21:03:48,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:48,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:49,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:49,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283383629] [2024-06-21 21:03:49,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283383629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:49,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:49,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:03:49,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647452683] [2024-06-21 21:03:49,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:49,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:03:49,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:49,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:03:49,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:03:49,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:03:49,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 724 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) [2024-06-21 21:03:49,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:49,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:03:49,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:51,071 INFO L124 PetriNetUnfolderBase]: 8032/11719 cut-off events. [2024-06-21 21:03:51,072 INFO L125 PetriNetUnfolderBase]: For 62062/62064 co-relation queries the response was YES. [2024-06-21 21:03:51,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45196 conditions, 11719 events. 8032/11719 cut-off events. For 62062/62064 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 68466 event pairs, 3728 based on Foata normal form. 6/11586 useless extension candidates. Maximal degree in co-relation 45168. Up to 10879 conditions per place. [2024-06-21 21:03:51,152 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 113 selfloop transitions, 17 changer transitions 0/139 dead transitions. [2024-06-21 21:03:51,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 139 transitions, 1149 flow [2024-06-21 21:03:51,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:03:51,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:03:51,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 21:03:51,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-21 21:03:51,154 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 724 flow. Second operand 7 states and 188 transitions. [2024-06-21 21:03:51,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 139 transitions, 1149 flow [2024-06-21 21:03:51,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 139 transitions, 1008 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 21:03:51,187 INFO L231 Difference]: Finished difference. Result has 87 places, 107 transitions, 705 flow [2024-06-21 21:03:51,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=705, PETRI_PLACES=87, PETRI_TRANSITIONS=107} [2024-06-21 21:03:51,187 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-21 21:03:51,187 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 107 transitions, 705 flow [2024-06-21 21:03:51,188 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) [2024-06-21 21:03:51,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:51,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:51,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:03:51,188 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:03:51,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:51,188 INFO L85 PathProgramCache]: Analyzing trace with hash 294175589, now seen corresponding path program 1 times [2024-06-21 21:03:51,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:51,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29463644] [2024-06-21 21:03:51,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:51,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:51,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:51,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29463644] [2024-06-21 21:03:51,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29463644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:51,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:51,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:03:51,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615908221] [2024-06-21 21:03:51,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:51,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:03:51,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:51,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:03:51,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:03:52,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-21 21:03:52,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 705 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:52,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:52,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-21 21:03:52,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:53,185 INFO L124 PetriNetUnfolderBase]: 7529/11383 cut-off events. [2024-06-21 21:03:53,185 INFO L125 PetriNetUnfolderBase]: For 72592/72609 co-relation queries the response was YES. [2024-06-21 21:03:53,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46063 conditions, 11383 events. 7529/11383 cut-off events. For 72592/72609 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 70190 event pairs, 3781 based on Foata normal form. 19/11368 useless extension candidates. Maximal degree in co-relation 46033. Up to 10255 conditions per place. [2024-06-21 21:03:53,266 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 102 selfloop transitions, 10 changer transitions 0/126 dead transitions. [2024-06-21 21:03:53,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 126 transitions, 1011 flow [2024-06-21 21:03:53,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:03:53,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:03:53,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-21 21:03:53,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5169811320754717 [2024-06-21 21:03:53,268 INFO L175 Difference]: Start difference. First operand has 87 places, 107 transitions, 705 flow. Second operand 5 states and 137 transitions. [2024-06-21 21:03:53,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 126 transitions, 1011 flow [2024-06-21 21:03:53,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 126 transitions, 951 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 21:03:53,314 INFO L231 Difference]: Finished difference. Result has 88 places, 111 transitions, 718 flow [2024-06-21 21:03:53,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=718, PETRI_PLACES=88, PETRI_TRANSITIONS=111} [2024-06-21 21:03:53,314 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-06-21 21:03:53,314 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 111 transitions, 718 flow [2024-06-21 21:03:53,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:53,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:53,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:53,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:03:53,315 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:03:53,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:53,316 INFO L85 PathProgramCache]: Analyzing trace with hash -196436560, now seen corresponding path program 1 times [2024-06-21 21:03:53,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:53,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643660602] [2024-06-21 21:03:53,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:53,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:54,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:54,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643660602] [2024-06-21 21:03:54,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643660602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:54,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:54,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:03:54,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098780865] [2024-06-21 21:03:54,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:54,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:03:54,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:54,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:03:54,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:03:54,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:03:54,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 111 transitions, 718 flow. Second operand has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:54,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:54,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:03:54,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:56,132 INFO L124 PetriNetUnfolderBase]: 9228/13214 cut-off events. [2024-06-21 21:03:56,132 INFO L125 PetriNetUnfolderBase]: For 110143/110354 co-relation queries the response was YES. [2024-06-21 21:03:56,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59400 conditions, 13214 events. 9228/13214 cut-off events. For 110143/110354 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 77240 event pairs, 3328 based on Foata normal form. 47/13190 useless extension candidates. Maximal degree in co-relation 59369. Up to 12078 conditions per place. [2024-06-21 21:03:56,238 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 126 selfloop transitions, 41 changer transitions 0/177 dead transitions. [2024-06-21 21:03:56,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 177 transitions, 1406 flow [2024-06-21 21:03:56,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:03:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:03:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-06-21 21:03:56,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303983228511531 [2024-06-21 21:03:56,242 INFO L175 Difference]: Start difference. First operand has 88 places, 111 transitions, 718 flow. Second operand 9 states and 253 transitions. [2024-06-21 21:03:56,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 177 transitions, 1406 flow [2024-06-21 21:03:56,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 177 transitions, 1363 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 21:03:56,291 INFO L231 Difference]: Finished difference. Result has 94 places, 115 transitions, 846 flow [2024-06-21 21:03:56,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=846, PETRI_PLACES=94, PETRI_TRANSITIONS=115} [2024-06-21 21:03:56,292 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-21 21:03:56,292 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 115 transitions, 846 flow [2024-06-21 21:03:56,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:56,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:56,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:56,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:03:56,293 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)] === [2024-06-21 21:03:56,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:56,293 INFO L85 PathProgramCache]: Analyzing trace with hash -193579600, now seen corresponding path program 2 times [2024-06-21 21:03:56,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:56,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957815287] [2024-06-21 21:03:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:56,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:57,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:57,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:57,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957815287] [2024-06-21 21:03:57,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957815287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:57,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:57,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:03:57,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236734686] [2024-06-21 21:03:57,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:57,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:03:57,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:57,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:03:57,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:03:57,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:03:57,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 115 transitions, 846 flow. Second operand has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:57,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:57,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:03:57,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:59,053 INFO L124 PetriNetUnfolderBase]: 9174/13146 cut-off events. [2024-06-21 21:03:59,053 INFO L125 PetriNetUnfolderBase]: For 125724/125912 co-relation queries the response was YES. [2024-06-21 21:03:59,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60827 conditions, 13146 events. 9174/13146 cut-off events. For 125724/125912 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 76868 event pairs, 3828 based on Foata normal form. 53/13128 useless extension candidates. Maximal degree in co-relation 60795. Up to 12228 conditions per place. [2024-06-21 21:03:59,150 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 118 selfloop transitions, 36 changer transitions 0/164 dead transitions. [2024-06-21 21:03:59,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 164 transitions, 1326 flow [2024-06-21 21:03:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:03:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:03:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-21 21:03:59,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235849056603774 [2024-06-21 21:03:59,153 INFO L175 Difference]: Start difference. First operand has 94 places, 115 transitions, 846 flow. Second operand 8 states and 222 transitions. [2024-06-21 21:03:59,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 164 transitions, 1326 flow [2024-06-21 21:03:59,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 164 transitions, 1257 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 21:03:59,215 INFO L231 Difference]: Finished difference. Result has 97 places, 115 transitions, 861 flow [2024-06-21 21:03:59,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=861, PETRI_PLACES=97, PETRI_TRANSITIONS=115} [2024-06-21 21:03:59,216 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 41 predicate places. [2024-06-21 21:03:59,216 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 115 transitions, 861 flow [2024-06-21 21:03:59,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:59,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:59,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:59,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:03:59,217 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)] === [2024-06-21 21:03:59,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:59,217 INFO L85 PathProgramCache]: Analyzing trace with hash -78288430, now seen corresponding path program 3 times [2024-06-21 21:03:59,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:59,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757539334] [2024-06-21 21:03:59,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:59,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:00,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:00,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757539334] [2024-06-21 21:04:00,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757539334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:00,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:00,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:04:00,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570914495] [2024-06-21 21:04:00,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:00,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:04:00,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:00,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:04:00,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:04:00,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:04:00,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 115 transitions, 861 flow. Second operand has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:00,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:00,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:04:00,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:02,111 INFO L124 PetriNetUnfolderBase]: 9280/13321 cut-off events. [2024-06-21 21:04:02,111 INFO L125 PetriNetUnfolderBase]: For 139712/139894 co-relation queries the response was YES. [2024-06-21 21:04:02,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62679 conditions, 13321 events. 9280/13321 cut-off events. For 139712/139894 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 78362 event pairs, 3970 based on Foata normal form. 76/13326 useless extension candidates. Maximal degree in co-relation 62645. Up to 12301 conditions per place. [2024-06-21 21:04:02,224 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 96 selfloop transitions, 55 changer transitions 0/161 dead transitions. [2024-06-21 21:04:02,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 161 transitions, 1353 flow [2024-06-21 21:04:02,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:02,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-21 21:04:02,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5259433962264151 [2024-06-21 21:04:02,227 INFO L175 Difference]: Start difference. First operand has 97 places, 115 transitions, 861 flow. Second operand 8 states and 223 transitions. [2024-06-21 21:04:02,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 161 transitions, 1353 flow [2024-06-21 21:04:02,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 161 transitions, 1271 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 21:04:02,307 INFO L231 Difference]: Finished difference. Result has 98 places, 117 transitions, 945 flow [2024-06-21 21:04:02,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=945, PETRI_PLACES=98, PETRI_TRANSITIONS=117} [2024-06-21 21:04:02,309 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 42 predicate places. [2024-06-21 21:04:02,309 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 117 transitions, 945 flow [2024-06-21 21:04:02,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:02,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:02,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:02,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:04:02,309 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)] === [2024-06-21 21:04:02,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:02,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1054302776, now seen corresponding path program 1 times [2024-06-21 21:04:02,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:02,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806073779] [2024-06-21 21:04:02,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:02,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:03,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:03,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806073779] [2024-06-21 21:04:03,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806073779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:03,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:03,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:04:03,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012855220] [2024-06-21 21:04:03,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:03,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:04:03,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:03,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:04:03,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:04:03,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:04:03,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 117 transitions, 945 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) [2024-06-21 21:04:03,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:03,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:04:03,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:05,167 INFO L124 PetriNetUnfolderBase]: 9660/13719 cut-off events. [2024-06-21 21:04:05,167 INFO L125 PetriNetUnfolderBase]: For 154774/154784 co-relation queries the response was YES. [2024-06-21 21:04:05,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65122 conditions, 13719 events. 9660/13719 cut-off events. For 154774/154784 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 78001 event pairs, 4176 based on Foata normal form. 14/13699 useless extension candidates. Maximal degree in co-relation 65087. Up to 13013 conditions per place. [2024-06-21 21:04:05,280 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 126 selfloop transitions, 35 changer transitions 0/169 dead transitions. [2024-06-21 21:04:05,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 169 transitions, 1496 flow [2024-06-21 21:04:05,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:05,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:05,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-21 21:04:05,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-21 21:04:05,285 INFO L175 Difference]: Start difference. First operand has 98 places, 117 transitions, 945 flow. Second operand 8 states and 214 transitions. [2024-06-21 21:04:05,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 169 transitions, 1496 flow [2024-06-21 21:04:05,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 169 transitions, 1366 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 21:04:05,371 INFO L231 Difference]: Finished difference. Result has 101 places, 124 transitions, 988 flow [2024-06-21 21:04:05,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=988, PETRI_PLACES=101, PETRI_TRANSITIONS=124} [2024-06-21 21:04:05,372 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-06-21 21:04:05,372 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 124 transitions, 988 flow [2024-06-21 21:04:05,372 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) [2024-06-21 21:04:05,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:05,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:05,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:04:05,373 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)] === [2024-06-21 21:04:05,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:05,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1232642212, now seen corresponding path program 1 times [2024-06-21 21:04:05,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:05,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024002388] [2024-06-21 21:04:05,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:05,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:06,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:06,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024002388] [2024-06-21 21:04:06,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024002388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:06,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:06,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:04:06,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855232297] [2024-06-21 21:04:06,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:06,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:04:06,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:06,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:04:06,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:04:06,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:04:06,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 124 transitions, 988 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-21 21:04:06,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:06,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:04:06,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:07,720 INFO L124 PetriNetUnfolderBase]: 9185/13312 cut-off events. [2024-06-21 21:04:07,721 INFO L125 PetriNetUnfolderBase]: For 176531/176551 co-relation queries the response was YES. [2024-06-21 21:04:07,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65891 conditions, 13312 events. 9185/13312 cut-off events. For 176531/176551 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 78387 event pairs, 4117 based on Foata normal form. 26/13228 useless extension candidates. Maximal degree in co-relation 65854. Up to 12334 conditions per place. [2024-06-21 21:04:07,845 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 110 selfloop transitions, 35 changer transitions 0/160 dead transitions. [2024-06-21 21:04:07,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 160 transitions, 1516 flow [2024-06-21 21:04:07,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:04:07,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:04:07,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-21 21:04:07,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-21 21:04:07,847 INFO L175 Difference]: Start difference. First operand has 101 places, 124 transitions, 988 flow. Second operand 6 states and 168 transitions. [2024-06-21 21:04:07,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 160 transitions, 1516 flow [2024-06-21 21:04:07,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 160 transitions, 1406 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 21:04:07,936 INFO L231 Difference]: Finished difference. Result has 102 places, 132 transitions, 1065 flow [2024-06-21 21:04:07,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1065, PETRI_PLACES=102, PETRI_TRANSITIONS=132} [2024-06-21 21:04:07,937 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-21 21:04:07,937 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 132 transitions, 1065 flow [2024-06-21 21:04:07,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-21 21:04:07,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:07,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:07,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:04:07,938 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:04:07,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:07,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1636339600, now seen corresponding path program 4 times [2024-06-21 21:04:07,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:07,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579753413] [2024-06-21 21:04:07,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:07,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:08,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:08,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579753413] [2024-06-21 21:04:08,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579753413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:08,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:08,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:04:08,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258535545] [2024-06-21 21:04:08,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:08,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:04:08,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:08,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:04:08,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:04:09,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:04:09,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 132 transitions, 1065 flow. Second operand has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:09,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:09,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:04:09,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:10,906 INFO L124 PetriNetUnfolderBase]: 9394/13547 cut-off events. [2024-06-21 21:04:10,906 INFO L125 PetriNetUnfolderBase]: For 204475/204616 co-relation queries the response was YES. [2024-06-21 21:04:10,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70654 conditions, 13547 events. 9394/13547 cut-off events. For 204475/204616 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 79730 event pairs, 3891 based on Foata normal form. 46/13496 useless extension candidates. Maximal degree in co-relation 70616. Up to 12451 conditions per place. [2024-06-21 21:04:11,054 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 108 selfloop transitions, 57 changer transitions 0/176 dead transitions. [2024-06-21 21:04:11,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 176 transitions, 1591 flow [2024-06-21 21:04:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:11,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:11,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-21 21:04:11,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-21 21:04:11,056 INFO L175 Difference]: Start difference. First operand has 102 places, 132 transitions, 1065 flow. Second operand 8 states and 220 transitions. [2024-06-21 21:04:11,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 176 transitions, 1591 flow [2024-06-21 21:04:11,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 176 transitions, 1545 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 21:04:11,185 INFO L231 Difference]: Finished difference. Result has 108 places, 134 transitions, 1199 flow [2024-06-21 21:04:11,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1019, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1199, PETRI_PLACES=108, PETRI_TRANSITIONS=134} [2024-06-21 21:04:11,185 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-21 21:04:11,186 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 134 transitions, 1199 flow [2024-06-21 21:04:11,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:11,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:11,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:11,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:04:11,186 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:04:11,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:11,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1425503702, now seen corresponding path program 2 times [2024-06-21 21:04:11,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:11,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818531568] [2024-06-21 21:04:11,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:11,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:12,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:12,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818531568] [2024-06-21 21:04:12,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818531568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:12,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:12,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:04:12,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263896671] [2024-06-21 21:04:12,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:12,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:04:12,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:12,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:04:12,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:04:12,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:04:12,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 134 transitions, 1199 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) [2024-06-21 21:04:12,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:12,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:04:12,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:13,863 INFO L124 PetriNetUnfolderBase]: 9844/14062 cut-off events. [2024-06-21 21:04:13,863 INFO L125 PetriNetUnfolderBase]: For 225848/225863 co-relation queries the response was YES. [2024-06-21 21:04:13,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74346 conditions, 14062 events. 9844/14062 cut-off events. For 225848/225863 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 80430 event pairs, 4172 based on Foata normal form. 20/14000 useless extension candidates. Maximal degree in co-relation 74306. Up to 13270 conditions per place. [2024-06-21 21:04:13,976 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 136 selfloop transitions, 43 changer transitions 0/187 dead transitions. [2024-06-21 21:04:13,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 187 transitions, 1823 flow [2024-06-21 21:04:13,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:13,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-21 21:04:13,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49528301886792453 [2024-06-21 21:04:13,977 INFO L175 Difference]: Start difference. First operand has 108 places, 134 transitions, 1199 flow. Second operand 8 states and 210 transitions. [2024-06-21 21:04:13,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 187 transitions, 1823 flow [2024-06-21 21:04:14,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 187 transitions, 1673 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 21:04:14,114 INFO L231 Difference]: Finished difference. Result has 111 places, 145 transitions, 1293 flow [2024-06-21 21:04:14,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1293, PETRI_PLACES=111, PETRI_TRANSITIONS=145} [2024-06-21 21:04:14,115 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-21 21:04:14,115 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 145 transitions, 1293 flow [2024-06-21 21:04:14,115 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) [2024-06-21 21:04:14,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:14,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:14,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:04:14,115 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:04:14,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:14,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1416932822, now seen corresponding path program 3 times [2024-06-21 21:04:14,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:14,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213841313] [2024-06-21 21:04:14,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:14,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:14,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:14,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213841313] [2024-06-21 21:04:14,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213841313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:14,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:14,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:04:14,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216582618] [2024-06-21 21:04:14,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:14,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:04:14,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:14,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:04:14,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:04:15,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:04:15,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 145 transitions, 1293 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) [2024-06-21 21:04:15,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:15,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:04:15,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:16,728 INFO L124 PetriNetUnfolderBase]: 9880/14114 cut-off events. [2024-06-21 21:04:16,728 INFO L125 PetriNetUnfolderBase]: For 250542/250557 co-relation queries the response was YES. [2024-06-21 21:04:16,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77253 conditions, 14114 events. 9880/14114 cut-off events. For 250542/250557 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 80809 event pairs, 3895 based on Foata normal form. 20/14052 useless extension candidates. Maximal degree in co-relation 77211. Up to 13185 conditions per place. [2024-06-21 21:04:16,853 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 135 selfloop transitions, 54 changer transitions 0/197 dead transitions. [2024-06-21 21:04:16,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 197 transitions, 2059 flow [2024-06-21 21:04:16,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:16,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:16,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-21 21:04:16,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-21 21:04:16,854 INFO L175 Difference]: Start difference. First operand has 111 places, 145 transitions, 1293 flow. Second operand 8 states and 214 transitions. [2024-06-21 21:04:16,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 197 transitions, 2059 flow [2024-06-21 21:04:16,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 197 transitions, 1951 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-21 21:04:17,000 INFO L231 Difference]: Finished difference. Result has 116 places, 151 transitions, 1445 flow [2024-06-21 21:04:17,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1445, PETRI_PLACES=116, PETRI_TRANSITIONS=151} [2024-06-21 21:04:17,001 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 60 predicate places. [2024-06-21 21:04:17,001 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 151 transitions, 1445 flow [2024-06-21 21:04:17,001 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) [2024-06-21 21:04:17,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:17,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:17,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:04:17,002 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)] === [2024-06-21 21:04:17,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:17,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1273693410, now seen corresponding path program 4 times [2024-06-21 21:04:17,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:17,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755180518] [2024-06-21 21:04:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:17,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:18,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:18,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755180518] [2024-06-21 21:04:18,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755180518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:18,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:18,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:04:18,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550507661] [2024-06-21 21:04:18,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:18,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:04:18,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:18,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:04:18,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:04:18,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:04:18,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 151 transitions, 1445 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) [2024-06-21 21:04:18,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:18,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:04:18,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:19,984 INFO L124 PetriNetUnfolderBase]: 9865/14109 cut-off events. [2024-06-21 21:04:19,985 INFO L125 PetriNetUnfolderBase]: For 273848/273863 co-relation queries the response was YES. [2024-06-21 21:04:20,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78006 conditions, 14109 events. 9865/14109 cut-off events. For 273848/273863 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 80878 event pairs, 4185 based on Foata normal form. 20/14047 useless extension candidates. Maximal degree in co-relation 77963. Up to 13301 conditions per place. [2024-06-21 21:04:20,108 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 143 selfloop transitions, 42 changer transitions 0/193 dead transitions. [2024-06-21 21:04:20,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 193 transitions, 1955 flow [2024-06-21 21:04:20,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:20,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:20,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-21 21:04:20,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49764150943396224 [2024-06-21 21:04:20,110 INFO L175 Difference]: Start difference. First operand has 116 places, 151 transitions, 1445 flow. Second operand 8 states and 211 transitions. [2024-06-21 21:04:20,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 193 transitions, 1955 flow [2024-06-21 21:04:20,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 193 transitions, 1801 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-21 21:04:20,313 INFO L231 Difference]: Finished difference. Result has 120 places, 151 transitions, 1385 flow [2024-06-21 21:04:20,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1385, PETRI_PLACES=120, PETRI_TRANSITIONS=151} [2024-06-21 21:04:20,313 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 64 predicate places. [2024-06-21 21:04:20,314 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 151 transitions, 1385 flow [2024-06-21 21:04:20,314 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) [2024-06-21 21:04:20,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:20,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:20,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:04:20,314 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)] === [2024-06-21 21:04:20,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:20,315 INFO L85 PathProgramCache]: Analyzing trace with hash -765065660, now seen corresponding path program 2 times [2024-06-21 21:04:20,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:20,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940002768] [2024-06-21 21:04:20,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:20,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:21,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:21,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940002768] [2024-06-21 21:04:21,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940002768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:21,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:21,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:04:21,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901206977] [2024-06-21 21:04:21,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:21,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:04:21,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:21,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:04:21,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:04:21,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:04:21,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 151 transitions, 1385 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-21 21:04:21,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:21,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:04:21,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:22,840 INFO L124 PetriNetUnfolderBase]: 9308/13518 cut-off events. [2024-06-21 21:04:22,840 INFO L125 PetriNetUnfolderBase]: For 286880/286895 co-relation queries the response was YES. [2024-06-21 21:04:22,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75276 conditions, 13518 events. 9308/13518 cut-off events. For 286880/286895 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 79759 event pairs, 4105 based on Foata normal form. 21/13426 useless extension candidates. Maximal degree in co-relation 75231. Up to 12517 conditions per place. [2024-06-21 21:04:22,969 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 116 selfloop transitions, 35 changer transitions 0/171 dead transitions. [2024-06-21 21:04:22,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 171 transitions, 1747 flow [2024-06-21 21:04:22,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:04:22,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:04:22,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 21:04:22,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 21:04:22,970 INFO L175 Difference]: Start difference. First operand has 120 places, 151 transitions, 1385 flow. Second operand 6 states and 159 transitions. [2024-06-21 21:04:22,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 171 transitions, 1747 flow [2024-06-21 21:04:23,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 171 transitions, 1583 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 21:04:23,137 INFO L231 Difference]: Finished difference. Result has 117 places, 151 transitions, 1300 flow [2024-06-21 21:04:23,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1300, PETRI_PLACES=117, PETRI_TRANSITIONS=151} [2024-06-21 21:04:23,138 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 61 predicate places. [2024-06-21 21:04:23,138 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 151 transitions, 1300 flow [2024-06-21 21:04:23,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-21 21:04:23,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:23,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:23,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:04:23,139 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)] === [2024-06-21 21:04:23,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:23,139 INFO L85 PathProgramCache]: Analyzing trace with hash 990285222, now seen corresponding path program 1 times [2024-06-21 21:04:23,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:23,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512380762] [2024-06-21 21:04:23,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:23,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:23,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:23,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:23,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512380762] [2024-06-21 21:04:23,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512380762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:23,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:23,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:04:23,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752136205] [2024-06-21 21:04:23,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:23,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:04:23,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:23,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:04:23,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:04:23,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:04:23,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 151 transitions, 1300 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-21 21:04:23,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:23,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:04:23,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:25,559 INFO L124 PetriNetUnfolderBase]: 8719/12874 cut-off events. [2024-06-21 21:04:25,559 INFO L125 PetriNetUnfolderBase]: For 265904/265906 co-relation queries the response was YES. [2024-06-21 21:04:25,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71090 conditions, 12874 events. 8719/12874 cut-off events. For 265904/265906 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 76772 event pairs, 3553 based on Foata normal form. 4/12793 useless extension candidates. Maximal degree in co-relation 71046. Up to 11874 conditions per place. [2024-06-21 21:04:25,663 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 155 selfloop transitions, 21 changer transitions 0/185 dead transitions. [2024-06-21 21:04:25,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 185 transitions, 1920 flow [2024-06-21 21:04:25,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:04:25,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:04:25,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-21 21:04:25,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-21 21:04:25,665 INFO L175 Difference]: Start difference. First operand has 117 places, 151 transitions, 1300 flow. Second operand 6 states and 165 transitions. [2024-06-21 21:04:25,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 185 transitions, 1920 flow [2024-06-21 21:04:25,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 185 transitions, 1819 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:04:25,848 INFO L231 Difference]: Finished difference. Result has 118 places, 159 transitions, 1366 flow [2024-06-21 21:04:25,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1366, PETRI_PLACES=118, PETRI_TRANSITIONS=159} [2024-06-21 21:04:25,850 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-21 21:04:25,850 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 159 transitions, 1366 flow [2024-06-21 21:04:25,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-21 21:04:25,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:25,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:25,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:04:25,851 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:04:25,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:25,851 INFO L85 PathProgramCache]: Analyzing trace with hash -724841858, now seen corresponding path program 2 times [2024-06-21 21:04:25,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:25,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95329286] [2024-06-21 21:04:25,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:25,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:26,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:26,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95329286] [2024-06-21 21:04:26,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95329286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:26,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:26,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:04:26,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536780542] [2024-06-21 21:04:26,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:26,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:04:26,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:26,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:04:26,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:04:26,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:04:26,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 159 transitions, 1366 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-21 21:04:26,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:26,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:04:26,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:28,254 INFO L124 PetriNetUnfolderBase]: 8705/12860 cut-off events. [2024-06-21 21:04:28,254 INFO L125 PetriNetUnfolderBase]: For 287900/287906 co-relation queries the response was YES. [2024-06-21 21:04:28,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73481 conditions, 12860 events. 8705/12860 cut-off events. For 287900/287906 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 76790 event pairs, 3530 based on Foata normal form. 8/12786 useless extension candidates. Maximal degree in co-relation 73436. Up to 11862 conditions per place. [2024-06-21 21:04:28,369 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 149 selfloop transitions, 21 changer transitions 0/179 dead transitions. [2024-06-21 21:04:28,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 179 transitions, 1766 flow [2024-06-21 21:04:28,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:04:28,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:04:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 21:04:28,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 21:04:28,371 INFO L175 Difference]: Start difference. First operand has 118 places, 159 transitions, 1366 flow. Second operand 6 states and 159 transitions. [2024-06-21 21:04:28,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 179 transitions, 1766 flow [2024-06-21 21:04:28,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 179 transitions, 1676 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-21 21:04:28,605 INFO L231 Difference]: Finished difference. Result has 122 places, 159 transitions, 1327 flow [2024-06-21 21:04:28,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1327, PETRI_PLACES=122, PETRI_TRANSITIONS=159} [2024-06-21 21:04:28,606 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-06-21 21:04:28,606 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 159 transitions, 1327 flow [2024-06-21 21:04:28,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-21 21:04:28,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:28,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:28,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:04:28,606 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)] === [2024-06-21 21:04:28,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:28,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1676350832, now seen corresponding path program 1 times [2024-06-21 21:04:28,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:28,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399731059] [2024-06-21 21:04:28,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:28,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:29,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:29,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399731059] [2024-06-21 21:04:29,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399731059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:29,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:29,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:29,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212464448] [2024-06-21 21:04:29,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:29,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:29,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:29,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:29,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:29,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:04:29,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 159 transitions, 1327 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:29,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:29,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:04:29,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:31,687 INFO L124 PetriNetUnfolderBase]: 10131/14522 cut-off events. [2024-06-21 21:04:31,687 INFO L125 PetriNetUnfolderBase]: For 363942/363946 co-relation queries the response was YES. [2024-06-21 21:04:31,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85276 conditions, 14522 events. 10131/14522 cut-off events. For 363942/363946 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 83653 event pairs, 4061 based on Foata normal form. 18/14443 useless extension candidates. Maximal degree in co-relation 85229. Up to 13077 conditions per place. [2024-06-21 21:04:31,828 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 143 selfloop transitions, 79 changer transitions 0/230 dead transitions. [2024-06-21 21:04:31,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 230 transitions, 2160 flow [2024-06-21 21:04:31,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:04:31,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:04:31,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-21 21:04:31,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5157232704402516 [2024-06-21 21:04:31,830 INFO L175 Difference]: Start difference. First operand has 122 places, 159 transitions, 1327 flow. Second operand 9 states and 246 transitions. [2024-06-21 21:04:31,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 230 transitions, 2160 flow [2024-06-21 21:04:32,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 230 transitions, 2101 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:04:32,047 INFO L231 Difference]: Finished difference. Result has 128 places, 175 transitions, 1678 flow [2024-06-21 21:04:32,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1678, PETRI_PLACES=128, PETRI_TRANSITIONS=175} [2024-06-21 21:04:32,047 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 72 predicate places. [2024-06-21 21:04:32,047 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 175 transitions, 1678 flow [2024-06-21 21:04:32,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:32,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:32,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:32,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:04:32,048 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:04:32,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:32,048 INFO L85 PathProgramCache]: Analyzing trace with hash 206624990, now seen corresponding path program 2 times [2024-06-21 21:04:32,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:32,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829491193] [2024-06-21 21:04:32,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:32,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:33,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:33,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:33,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829491193] [2024-06-21 21:04:33,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829491193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:33,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:33,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:33,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110753370] [2024-06-21 21:04:33,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:33,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:33,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:33,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:33,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:33,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:04:33,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 175 transitions, 1678 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:33,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:33,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:04:33,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:35,312 INFO L124 PetriNetUnfolderBase]: 10373/14915 cut-off events. [2024-06-21 21:04:35,312 INFO L125 PetriNetUnfolderBase]: For 403371/403373 co-relation queries the response was YES. [2024-06-21 21:04:35,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90600 conditions, 14915 events. 10373/14915 cut-off events. For 403371/403373 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 86559 event pairs, 4115 based on Foata normal form. 18/14842 useless extension candidates. Maximal degree in co-relation 90550. Up to 13600 conditions per place. [2024-06-21 21:04:35,474 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 147 selfloop transitions, 81 changer transitions 0/236 dead transitions. [2024-06-21 21:04:35,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 236 transitions, 2454 flow [2024-06-21 21:04:35,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:04:35,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:04:35,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-21 21:04:35,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115303983228512 [2024-06-21 21:04:35,476 INFO L175 Difference]: Start difference. First operand has 128 places, 175 transitions, 1678 flow. Second operand 9 states and 244 transitions. [2024-06-21 21:04:35,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 236 transitions, 2454 flow [2024-06-21 21:04:35,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 236 transitions, 2290 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 21:04:35,775 INFO L231 Difference]: Finished difference. Result has 135 places, 184 transitions, 1856 flow [2024-06-21 21:04:35,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1856, PETRI_PLACES=135, PETRI_TRANSITIONS=184} [2024-06-21 21:04:35,775 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-21 21:04:35,775 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 184 transitions, 1856 flow [2024-06-21 21:04:35,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:35,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:35,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:35,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:04:35,776 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:04:35,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:35,776 INFO L85 PathProgramCache]: Analyzing trace with hash -984439812, now seen corresponding path program 3 times [2024-06-21 21:04:35,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:35,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568159359] [2024-06-21 21:04:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:35,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:36,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:36,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568159359] [2024-06-21 21:04:36,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568159359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:36,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:36,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:36,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891850374] [2024-06-21 21:04:36,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:36,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:36,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:36,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:36,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:37,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:04:37,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 184 transitions, 1856 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:37,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:37,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:04:37,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:39,100 INFO L124 PetriNetUnfolderBase]: 10557/15227 cut-off events. [2024-06-21 21:04:39,100 INFO L125 PetriNetUnfolderBase]: For 442337/442339 co-relation queries the response was YES. [2024-06-21 21:04:39,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94620 conditions, 15227 events. 10557/15227 cut-off events. For 442337/442339 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 89152 event pairs, 4163 based on Foata normal form. 18/15154 useless extension candidates. Maximal degree in co-relation 94567. Up to 13880 conditions per place. [2024-06-21 21:04:39,256 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 149 selfloop transitions, 86 changer transitions 0/243 dead transitions. [2024-06-21 21:04:39,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 243 transitions, 2640 flow [2024-06-21 21:04:39,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:04:39,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:04:39,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-21 21:04:39,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-21 21:04:39,257 INFO L175 Difference]: Start difference. First operand has 135 places, 184 transitions, 1856 flow. Second operand 9 states and 243 transitions. [2024-06-21 21:04:39,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 243 transitions, 2640 flow [2024-06-21 21:04:39,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 243 transitions, 2452 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 21:04:39,609 INFO L231 Difference]: Finished difference. Result has 141 places, 191 transitions, 1999 flow [2024-06-21 21:04:39,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1999, PETRI_PLACES=141, PETRI_TRANSITIONS=191} [2024-06-21 21:04:39,610 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2024-06-21 21:04:39,610 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 191 transitions, 1999 flow [2024-06-21 21:04:39,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:39,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:39,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:39,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:04:39,611 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:04:39,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:39,611 INFO L85 PathProgramCache]: Analyzing trace with hash -975243042, now seen corresponding path program 4 times [2024-06-21 21:04:39,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:39,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724622992] [2024-06-21 21:04:39,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:39,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:40,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:40,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724622992] [2024-06-21 21:04:40,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724622992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:40,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:40,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:40,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385422725] [2024-06-21 21:04:40,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:40,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:40,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:40,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:40,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:40,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:04:40,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 191 transitions, 1999 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:40,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:40,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:04:40,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:43,274 INFO L124 PetriNetUnfolderBase]: 10518/15160 cut-off events. [2024-06-21 21:04:43,274 INFO L125 PetriNetUnfolderBase]: For 469930/469932 co-relation queries the response was YES. [2024-06-21 21:04:43,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95194 conditions, 15160 events. 10518/15160 cut-off events. For 469930/469932 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 88494 event pairs, 3780 based on Foata normal form. 18/15087 useless extension candidates. Maximal degree in co-relation 95139. Up to 12881 conditions per place. [2024-06-21 21:04:43,414 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 131 selfloop transitions, 106 changer transitions 0/245 dead transitions. [2024-06-21 21:04:43,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 245 transitions, 2689 flow [2024-06-21 21:04:43,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:04:43,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:04:43,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-21 21:04:43,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073375262054507 [2024-06-21 21:04:43,432 INFO L175 Difference]: Start difference. First operand has 141 places, 191 transitions, 1999 flow. Second operand 9 states and 242 transitions. [2024-06-21 21:04:43,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 245 transitions, 2689 flow [2024-06-21 21:04:43,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 245 transitions, 2505 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 21:04:43,753 INFO L231 Difference]: Finished difference. Result has 145 places, 192 transitions, 2072 flow [2024-06-21 21:04:43,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2072, PETRI_PLACES=145, PETRI_TRANSITIONS=192} [2024-06-21 21:04:43,754 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 89 predicate places. [2024-06-21 21:04:43,754 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 192 transitions, 2072 flow [2024-06-21 21:04:43,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:43,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:43,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:43,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:04:43,755 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)] === [2024-06-21 21:04:43,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:43,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1384220528, now seen corresponding path program 1 times [2024-06-21 21:04:43,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:43,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475237981] [2024-06-21 21:04:43,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:43,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:44,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:44,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475237981] [2024-06-21 21:04:44,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475237981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:44,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:44,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:04:44,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522416620] [2024-06-21 21:04:44,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:44,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:04:44,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:44,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:04:44,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:04:44,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:04:44,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 192 transitions, 2072 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:44,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:44,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:04:44,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:46,583 INFO L124 PetriNetUnfolderBase]: 9400/13980 cut-off events. [2024-06-21 21:04:46,583 INFO L125 PetriNetUnfolderBase]: For 430326/430328 co-relation queries the response was YES. [2024-06-21 21:04:46,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87357 conditions, 13980 events. 9400/13980 cut-off events. For 430326/430328 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 85217 event pairs, 3568 based on Foata normal form. 4/13894 useless extension candidates. Maximal degree in co-relation 87301. Up to 12935 conditions per place. [2024-06-21 21:04:46,711 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 198 selfloop transitions, 18 changer transitions 0/225 dead transitions. [2024-06-21 21:04:46,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 225 transitions, 2668 flow [2024-06-21 21:04:46,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:04:46,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:04:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 21:04:46,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-21 21:04:46,712 INFO L175 Difference]: Start difference. First operand has 145 places, 192 transitions, 2072 flow. Second operand 7 states and 184 transitions. [2024-06-21 21:04:46,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 225 transitions, 2668 flow [2024-06-21 21:04:47,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 225 transitions, 2399 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 21:04:47,043 INFO L231 Difference]: Finished difference. Result has 145 places, 196 transitions, 1930 flow [2024-06-21 21:04:47,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1803, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1930, PETRI_PLACES=145, PETRI_TRANSITIONS=196} [2024-06-21 21:04:47,044 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 89 predicate places. [2024-06-21 21:04:47,044 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 196 transitions, 1930 flow [2024-06-21 21:04:47,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:47,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:47,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:47,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:04:47,045 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)] === [2024-06-21 21:04:47,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:47,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1554918308, now seen corresponding path program 2 times [2024-06-21 21:04:47,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:47,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113175594] [2024-06-21 21:04:47,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:47,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:47,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:47,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113175594] [2024-06-21 21:04:47,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113175594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:47,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:47,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:04:47,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345461580] [2024-06-21 21:04:47,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:47,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:04:47,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:47,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:04:47,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:04:47,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:04:47,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 196 transitions, 1930 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:47,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:47,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:04:47,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:49,916 INFO L124 PetriNetUnfolderBase]: 9432/14025 cut-off events. [2024-06-21 21:04:49,916 INFO L125 PetriNetUnfolderBase]: For 451859/451861 co-relation queries the response was YES. [2024-06-21 21:04:49,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89015 conditions, 14025 events. 9432/14025 cut-off events. For 451859/451861 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 85358 event pairs, 3546 based on Foata normal form. 4/13936 useless extension candidates. Maximal degree in co-relation 88958. Up to 12866 conditions per place. [2024-06-21 21:04:50,068 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 191 selfloop transitions, 35 changer transitions 0/235 dead transitions. [2024-06-21 21:04:50,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 235 transitions, 2748 flow [2024-06-21 21:04:50,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:04:50,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:04:50,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-21 21:04:50,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121293800539084 [2024-06-21 21:04:50,069 INFO L175 Difference]: Start difference. First operand has 145 places, 196 transitions, 1930 flow. Second operand 7 states and 190 transitions. [2024-06-21 21:04:50,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 235 transitions, 2748 flow [2024-06-21 21:04:50,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 235 transitions, 2651 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 21:04:50,469 INFO L231 Difference]: Finished difference. Result has 147 places, 204 transitions, 2084 flow [2024-06-21 21:04:50,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2084, PETRI_PLACES=147, PETRI_TRANSITIONS=204} [2024-06-21 21:04:50,470 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-06-21 21:04:50,470 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 204 transitions, 2084 flow [2024-06-21 21:04:50,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:50,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:50,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:50,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:04:50,471 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)] === [2024-06-21 21:04:50,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:50,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1897979346, now seen corresponding path program 3 times [2024-06-21 21:04:50,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:50,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106979722] [2024-06-21 21:04:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:50,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:51,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:51,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106979722] [2024-06-21 21:04:51,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106979722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:51,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:51,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:04:51,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188792608] [2024-06-21 21:04:51,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:51,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:04:51,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:51,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:04:51,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:04:51,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:04:51,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 204 transitions, 2084 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:51,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:51,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:04:51,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:53,432 INFO L124 PetriNetUnfolderBase]: 9418/14010 cut-off events. [2024-06-21 21:04:53,432 INFO L125 PetriNetUnfolderBase]: For 482767/482771 co-relation queries the response was YES. [2024-06-21 21:04:53,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91434 conditions, 14010 events. 9418/14010 cut-off events. For 482767/482771 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 85253 event pairs, 3513 based on Foata normal form. 4/13925 useless extension candidates. Maximal degree in co-relation 91376. Up to 12854 conditions per place. [2024-06-21 21:04:53,589 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 185 selfloop transitions, 35 changer transitions 0/229 dead transitions. [2024-06-21 21:04:53,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 229 transitions, 2598 flow [2024-06-21 21:04:53,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:04:53,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:04:53,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 21:04:53,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-21 21:04:53,591 INFO L175 Difference]: Start difference. First operand has 147 places, 204 transitions, 2084 flow. Second operand 7 states and 184 transitions. [2024-06-21 21:04:53,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 229 transitions, 2598 flow [2024-06-21 21:04:53,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 229 transitions, 2452 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-21 21:04:53,999 INFO L231 Difference]: Finished difference. Result has 151 places, 204 transitions, 2017 flow [2024-06-21 21:04:53,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1938, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2017, PETRI_PLACES=151, PETRI_TRANSITIONS=204} [2024-06-21 21:04:54,000 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 95 predicate places. [2024-06-21 21:04:54,000 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 204 transitions, 2017 flow [2024-06-21 21:04:54,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:54,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:54,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:54,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:04:54,001 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)] === [2024-06-21 21:04:54,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:54,001 INFO L85 PathProgramCache]: Analyzing trace with hash 2053200428, now seen corresponding path program 1 times [2024-06-21 21:04:54,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:54,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974507281] [2024-06-21 21:04:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:54,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:55,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:55,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974507281] [2024-06-21 21:04:55,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974507281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:55,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:55,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:04:55,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562092849] [2024-06-21 21:04:55,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:55,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:04:55,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:55,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:04:55,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:04:55,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-21 21:04:55,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 204 transitions, 2017 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:55,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:55,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-21 21:04:55,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:57,291 INFO L124 PetriNetUnfolderBase]: 8867/13343 cut-off events. [2024-06-21 21:04:57,291 INFO L125 PetriNetUnfolderBase]: For 505160/505181 co-relation queries the response was YES. [2024-06-21 21:04:57,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88645 conditions, 13343 events. 8867/13343 cut-off events. For 505160/505181 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 82961 event pairs, 3477 based on Foata normal form. 19/13191 useless extension candidates. Maximal degree in co-relation 88585. Up to 12144 conditions per place. [2024-06-21 21:04:57,460 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 196 selfloop transitions, 17 changer transitions 0/234 dead transitions. [2024-06-21 21:04:57,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 234 transitions, 2620 flow [2024-06-21 21:04:57,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:04:57,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:04:57,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 21:04:57,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-21 21:04:57,461 INFO L175 Difference]: Start difference. First operand has 151 places, 204 transitions, 2017 flow. Second operand 7 states and 183 transitions. [2024-06-21 21:04:57,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 234 transitions, 2620 flow [2024-06-21 21:04:57,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 234 transitions, 2510 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 21:04:57,927 INFO L231 Difference]: Finished difference. Result has 153 places, 211 transitions, 2069 flow [2024-06-21 21:04:57,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1914, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2069, PETRI_PLACES=153, PETRI_TRANSITIONS=211} [2024-06-21 21:04:57,928 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-21 21:04:57,928 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 211 transitions, 2069 flow [2024-06-21 21:04:57,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:57,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:57,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:57,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:04:57,929 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:04:57,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:57,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1956312483, now seen corresponding path program 1 times [2024-06-21 21:04:57,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:57,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035926151] [2024-06-21 21:04:57,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:57,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:58,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:58,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035926151] [2024-06-21 21:04:58,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035926151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:58,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:58,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:04:58,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104261646] [2024-06-21 21:04:58,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:58,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:04:58,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:58,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:04:58,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:04:58,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-21 21:04:58,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 211 transitions, 2069 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:58,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:58,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-21 21:04:58,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:00,466 INFO L124 PetriNetUnfolderBase]: 8467/12931 cut-off events. [2024-06-21 21:05:00,467 INFO L125 PetriNetUnfolderBase]: For 525354/525511 co-relation queries the response was YES. [2024-06-21 21:05:00,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89301 conditions, 12931 events. 8467/12931 cut-off events. For 525354/525511 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 82764 event pairs, 3263 based on Foata normal form. 16/12670 useless extension candidates. Maximal degree in co-relation 89239. Up to 11541 conditions per place. [2024-06-21 21:05:00,608 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 187 selfloop transitions, 10 changer transitions 0/226 dead transitions. [2024-06-21 21:05:00,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 226 transitions, 2569 flow [2024-06-21 21:05:00,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:05:00,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:05:00,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-21 21:05:00,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-21 21:05:00,609 INFO L175 Difference]: Start difference. First operand has 153 places, 211 transitions, 2069 flow. Second operand 5 states and 135 transitions. [2024-06-21 21:05:00,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 226 transitions, 2569 flow [2024-06-21 21:05:01,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 226 transitions, 2471 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-21 21:05:01,098 INFO L231 Difference]: Finished difference. Result has 154 places, 215 transitions, 2078 flow [2024-06-21 21:05:01,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1971, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2078, PETRI_PLACES=154, PETRI_TRANSITIONS=215} [2024-06-21 21:05:01,098 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-21 21:05:01,098 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 215 transitions, 2078 flow [2024-06-21 21:05:01,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:01,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:01,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:01,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:05:01,099 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)] === [2024-06-21 21:05:01,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:01,099 INFO L85 PathProgramCache]: Analyzing trace with hash 2129595771, now seen corresponding path program 1 times [2024-06-21 21:05:01,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:01,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585419706] [2024-06-21 21:05:01,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:01,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:02,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:02,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585419706] [2024-06-21 21:05:02,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585419706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:02,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:02,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:05:02,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704139720] [2024-06-21 21:05:02,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:02,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:05:02,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:02,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:05:02,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:05:02,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:05:02,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 215 transitions, 2078 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) [2024-06-21 21:05:02,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:02,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:05:02,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:04,576 INFO L124 PetriNetUnfolderBase]: 10630/15344 cut-off events. [2024-06-21 21:05:04,576 INFO L125 PetriNetUnfolderBase]: For 654732/654744 co-relation queries the response was YES. [2024-06-21 21:05:04,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108341 conditions, 15344 events. 10630/15344 cut-off events. For 654732/654744 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 89839 event pairs, 4061 based on Foata normal form. 16/15358 useless extension candidates. Maximal degree in co-relation 108278. Up to 14325 conditions per place. [2024-06-21 21:05:04,708 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 215 selfloop transitions, 51 changer transitions 0/274 dead transitions. [2024-06-21 21:05:04,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 274 transitions, 3282 flow [2024-06-21 21:05:04,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:05:04,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:05:04,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-21 21:05:04,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202156334231806 [2024-06-21 21:05:04,710 INFO L175 Difference]: Start difference. First operand has 154 places, 215 transitions, 2078 flow. Second operand 7 states and 193 transitions. [2024-06-21 21:05:04,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 274 transitions, 3282 flow [2024-06-21 21:05:05,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 274 transitions, 3203 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 21:05:05,025 INFO L231 Difference]: Finished difference. Result has 159 places, 233 transitions, 2439 flow [2024-06-21 21:05:05,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2439, PETRI_PLACES=159, PETRI_TRANSITIONS=233} [2024-06-21 21:05:05,026 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 103 predicate places. [2024-06-21 21:05:05,026 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 233 transitions, 2439 flow [2024-06-21 21:05:05,026 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) [2024-06-21 21:05:05,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:05,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:05,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:05:05,027 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:05:05,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:05,027 INFO L85 PathProgramCache]: Analyzing trace with hash 2135309691, now seen corresponding path program 2 times [2024-06-21 21:05:05,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:05,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82511565] [2024-06-21 21:05:05,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:05,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:05,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:05,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82511565] [2024-06-21 21:05:05,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82511565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:05,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:05,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:05:05,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248638356] [2024-06-21 21:05:05,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:05,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:05:05,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:05,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:05:05,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:05:06,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:05:06,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 233 transitions, 2439 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) [2024-06-21 21:05:06,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:06,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:05:06,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:08,702 INFO L124 PetriNetUnfolderBase]: 10708/15451 cut-off events. [2024-06-21 21:05:08,702 INFO L125 PetriNetUnfolderBase]: For 700485/700497 co-relation queries the response was YES. [2024-06-21 21:05:08,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112753 conditions, 15451 events. 10708/15451 cut-off events. For 700485/700497 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 90506 event pairs, 4035 based on Foata normal form. 16/15465 useless extension candidates. Maximal degree in co-relation 112688. Up to 14395 conditions per place. [2024-06-21 21:05:08,876 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 212 selfloop transitions, 59 changer transitions 0/279 dead transitions. [2024-06-21 21:05:08,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 279 transitions, 3551 flow [2024-06-21 21:05:08,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:05:08,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:05:08,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-21 21:05:08,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121293800539084 [2024-06-21 21:05:08,877 INFO L175 Difference]: Start difference. First operand has 159 places, 233 transitions, 2439 flow. Second operand 7 states and 190 transitions. [2024-06-21 21:05:08,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 279 transitions, 3551 flow [2024-06-21 21:05:09,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 279 transitions, 3396 flow, removed 67 selfloop flow, removed 2 redundant places. [2024-06-21 21:05:09,451 INFO L231 Difference]: Finished difference. Result has 164 places, 241 transitions, 2595 flow [2024-06-21 21:05:09,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2314, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2595, PETRI_PLACES=164, PETRI_TRANSITIONS=241} [2024-06-21 21:05:09,452 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 108 predicate places. [2024-06-21 21:05:09,452 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 241 transitions, 2595 flow [2024-06-21 21:05:09,452 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) [2024-06-21 21:05:09,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:09,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:09,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:05:09,453 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)] === [2024-06-21 21:05:09,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:09,453 INFO L85 PathProgramCache]: Analyzing trace with hash 45777117, now seen corresponding path program 3 times [2024-06-21 21:05:09,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:09,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973084457] [2024-06-21 21:05:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:09,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:10,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:10,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973084457] [2024-06-21 21:05:10,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973084457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:10,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:10,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:05:10,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518009784] [2024-06-21 21:05:10,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:10,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:05:10,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:10,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:05:10,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:05:10,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:05:10,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 241 transitions, 2595 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) [2024-06-21 21:05:10,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:10,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:05:10,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:13,212 INFO L124 PetriNetUnfolderBase]: 10694/15429 cut-off events. [2024-06-21 21:05:13,212 INFO L125 PetriNetUnfolderBase]: For 727775/727790 co-relation queries the response was YES. [2024-06-21 21:05:13,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113415 conditions, 15429 events. 10694/15429 cut-off events. For 727775/727790 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 90270 event pairs, 4031 based on Foata normal form. 18/15443 useless extension candidates. Maximal degree in co-relation 113348. Up to 14383 conditions per place. [2024-06-21 21:05:13,420 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 213 selfloop transitions, 61 changer transitions 0/282 dead transitions. [2024-06-21 21:05:13,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 282 transitions, 3571 flow [2024-06-21 21:05:13,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:05:13,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:05:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-21 21:05:13,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121293800539084 [2024-06-21 21:05:13,421 INFO L175 Difference]: Start difference. First operand has 164 places, 241 transitions, 2595 flow. Second operand 7 states and 190 transitions. [2024-06-21 21:05:13,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 282 transitions, 3571 flow [2024-06-21 21:05:14,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 282 transitions, 3375 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-21 21:05:14,209 INFO L231 Difference]: Finished difference. Result has 168 places, 243 transitions, 2560 flow [2024-06-21 21:05:14,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2560, PETRI_PLACES=168, PETRI_TRANSITIONS=243} [2024-06-21 21:05:14,210 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 112 predicate places. [2024-06-21 21:05:14,210 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 243 transitions, 2560 flow [2024-06-21 21:05:14,210 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) [2024-06-21 21:05:14,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:14,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:14,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:05:14,211 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)] === [2024-06-21 21:05:14,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:14,211 INFO L85 PathProgramCache]: Analyzing trace with hash -957833861, now seen corresponding path program 4 times [2024-06-21 21:05:14,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:14,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212831230] [2024-06-21 21:05:14,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:14,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:15,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:15,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212831230] [2024-06-21 21:05:15,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212831230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:15,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:15,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:05:15,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032299906] [2024-06-21 21:05:15,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:15,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:05:15,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:15,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:05:15,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:05:15,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:05:15,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 243 transitions, 2560 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) [2024-06-21 21:05:15,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:15,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:05:15,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:18,015 INFO L124 PetriNetUnfolderBase]: 10726/15466 cut-off events. [2024-06-21 21:05:18,015 INFO L125 PetriNetUnfolderBase]: For 758491/758506 co-relation queries the response was YES. [2024-06-21 21:05:18,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114449 conditions, 15466 events. 10726/15466 cut-off events. For 758491/758506 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 90430 event pairs, 4031 based on Foata normal form. 18/15480 useless extension candidates. Maximal degree in co-relation 114381. Up to 14412 conditions per place. [2024-06-21 21:05:18,188 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 208 selfloop transitions, 65 changer transitions 0/281 dead transitions. [2024-06-21 21:05:18,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 281 transitions, 3454 flow [2024-06-21 21:05:18,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:05:18,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:05:18,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 21:05:18,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49865229110512127 [2024-06-21 21:05:18,190 INFO L175 Difference]: Start difference. First operand has 168 places, 243 transitions, 2560 flow. Second operand 7 states and 185 transitions. [2024-06-21 21:05:18,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 281 transitions, 3454 flow [2024-06-21 21:05:18,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 281 transitions, 3340 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 21:05:18,853 INFO L231 Difference]: Finished difference. Result has 172 places, 247 transitions, 2679 flow [2024-06-21 21:05:18,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2456, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2679, PETRI_PLACES=172, PETRI_TRANSITIONS=247} [2024-06-21 21:05:18,854 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 116 predicate places. [2024-06-21 21:05:18,854 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 247 transitions, 2679 flow [2024-06-21 21:05:18,854 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) [2024-06-21 21:05:18,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:18,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:18,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:05:18,855 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)] === [2024-06-21 21:05:18,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:18,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1540012189, now seen corresponding path program 5 times [2024-06-21 21:05:18,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:18,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203722080] [2024-06-21 21:05:18,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:18,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:19,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:19,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203722080] [2024-06-21 21:05:19,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203722080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:19,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:19,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:05:19,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838232443] [2024-06-21 21:05:19,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:19,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:05:19,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:19,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:05:19,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:05:20,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:05:20,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 247 transitions, 2679 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) [2024-06-21 21:05:20,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:20,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:05:20,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:22,558 INFO L124 PetriNetUnfolderBase]: 10712/15451 cut-off events. [2024-06-21 21:05:22,558 INFO L125 PetriNetUnfolderBase]: For 789410/789447 co-relation queries the response was YES. [2024-06-21 21:05:22,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115080 conditions, 15451 events. 10712/15451 cut-off events. For 789410/789447 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 90466 event pairs, 4033 based on Foata normal form. 32/15480 useless extension candidates. Maximal degree in co-relation 115010. Up to 14400 conditions per place. [2024-06-21 21:05:22,973 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 204 selfloop transitions, 65 changer transitions 0/277 dead transitions. [2024-06-21 21:05:22,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 277 transitions, 3461 flow [2024-06-21 21:05:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:05:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:05:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 21:05:22,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48787061994609165 [2024-06-21 21:05:22,975 INFO L175 Difference]: Start difference. First operand has 172 places, 247 transitions, 2679 flow. Second operand 7 states and 181 transitions. [2024-06-21 21:05:22,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 277 transitions, 3461 flow [2024-06-21 21:05:23,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 277 transitions, 3269 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-21 21:05:23,664 INFO L231 Difference]: Finished difference. Result has 175 places, 247 transitions, 2626 flow [2024-06-21 21:05:23,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2487, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2626, PETRI_PLACES=175, PETRI_TRANSITIONS=247} [2024-06-21 21:05:23,665 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 119 predicate places. [2024-06-21 21:05:23,665 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 247 transitions, 2626 flow [2024-06-21 21:05:23,665 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) [2024-06-21 21:05:23,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:23,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:23,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:05:23,665 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)] === [2024-06-21 21:05:23,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:23,666 INFO L85 PathProgramCache]: Analyzing trace with hash 232562043, now seen corresponding path program 6 times [2024-06-21 21:05:23,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:23,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841555335] [2024-06-21 21:05:23,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:23,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:24,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:24,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841555335] [2024-06-21 21:05:24,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841555335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:24,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:24,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:05:24,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276869873] [2024-06-21 21:05:24,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:24,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:05:24,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:24,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:05:24,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:05:24,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:05:24,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 247 transitions, 2626 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) [2024-06-21 21:05:24,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:24,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:05:24,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:27,411 INFO L124 PetriNetUnfolderBase]: 10698/15438 cut-off events. [2024-06-21 21:05:27,412 INFO L125 PetriNetUnfolderBase]: For 818118/818155 co-relation queries the response was YES. [2024-06-21 21:05:27,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115567 conditions, 15438 events. 10698/15438 cut-off events. For 818118/818155 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 90397 event pairs, 4033 based on Foata normal form. 32/15467 useless extension candidates. Maximal degree in co-relation 115496. Up to 14388 conditions per place. [2024-06-21 21:05:27,710 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 202 selfloop transitions, 65 changer transitions 0/275 dead transitions. [2024-06-21 21:05:27,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 275 transitions, 3258 flow [2024-06-21 21:05:27,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:05:27,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:05:27,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 21:05:27,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48247978436657685 [2024-06-21 21:05:27,724 INFO L175 Difference]: Start difference. First operand has 175 places, 247 transitions, 2626 flow. Second operand 7 states and 179 transitions. [2024-06-21 21:05:27,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 275 transitions, 3258 flow [2024-06-21 21:05:28,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 275 transitions, 3074 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 21:05:28,298 INFO L231 Difference]: Finished difference. Result has 178 places, 247 transitions, 2581 flow [2024-06-21 21:05:28,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2442, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2581, PETRI_PLACES=178, PETRI_TRANSITIONS=247} [2024-06-21 21:05:28,299 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 122 predicate places. [2024-06-21 21:05:28,299 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 247 transitions, 2581 flow [2024-06-21 21:05:28,299 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) [2024-06-21 21:05:28,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:28,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:28,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:05:28,300 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:05:28,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:28,301 INFO L85 PathProgramCache]: Analyzing trace with hash 539384207, now seen corresponding path program 1 times [2024-06-21 21:05:28,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:28,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629503253] [2024-06-21 21:05:28,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:28,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:29,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:29,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629503253] [2024-06-21 21:05:29,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629503253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:29,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:29,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:05:29,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143845038] [2024-06-21 21:05:29,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:29,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:05:29,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:29,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:05:29,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:05:29,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-21 21:05:29,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 247 transitions, 2581 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:29,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:29,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-21 21:05:29,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:31,757 INFO L124 PetriNetUnfolderBase]: 9584/14275 cut-off events. [2024-06-21 21:05:31,757 INFO L125 PetriNetUnfolderBase]: For 826395/826656 co-relation queries the response was YES. [2024-06-21 21:05:31,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109213 conditions, 14275 events. 9584/14275 cut-off events. For 826395/826656 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 88543 event pairs, 3743 based on Foata normal form. 16/14089 useless extension candidates. Maximal degree in co-relation 109141. Up to 12955 conditions per place. [2024-06-21 21:05:31,923 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 207 selfloop transitions, 14 changer transitions 0/263 dead transitions. [2024-06-21 21:05:31,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 263 transitions, 3137 flow [2024-06-21 21:05:31,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:05:31,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:05:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 21:05:31,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2024-06-21 21:05:31,924 INFO L175 Difference]: Start difference. First operand has 178 places, 247 transitions, 2581 flow. Second operand 6 states and 152 transitions. [2024-06-21 21:05:31,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 263 transitions, 3137 flow [2024-06-21 21:05:32,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 263 transitions, 2959 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 21:05:32,481 INFO L231 Difference]: Finished difference. Result has 177 places, 251 transitions, 2524 flow [2024-06-21 21:05:32,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2403, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2524, PETRI_PLACES=177, PETRI_TRANSITIONS=251} [2024-06-21 21:05:32,482 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 121 predicate places. [2024-06-21 21:05:32,482 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 251 transitions, 2524 flow [2024-06-21 21:05:32,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:32,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:32,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:32,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:05:32,483 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)] === [2024-06-21 21:05:32,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:32,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1759841485, now seen corresponding path program 1 times [2024-06-21 21:05:32,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:32,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066936349] [2024-06-21 21:05:32,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:32,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:33,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:33,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066936349] [2024-06-21 21:05:33,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066936349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:33,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:33,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:05:33,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310499093] [2024-06-21 21:05:33,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:33,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:05:33,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:33,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:05:33,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:05:33,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:05:33,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 251 transitions, 2524 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:33,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:33,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:05:33,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:36,463 INFO L124 PetriNetUnfolderBase]: 11245/16117 cut-off events. [2024-06-21 21:05:36,468 INFO L125 PetriNetUnfolderBase]: For 1036279/1036287 co-relation queries the response was YES. [2024-06-21 21:05:36,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129675 conditions, 16117 events. 11245/16117 cut-off events. For 1036279/1036287 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 93746 event pairs, 3549 based on Foata normal form. 24/16139 useless extension candidates. Maximal degree in co-relation 129602. Up to 14799 conditions per place. [2024-06-21 21:05:36,673 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 251 selfloop transitions, 50 changer transitions 0/310 dead transitions. [2024-06-21 21:05:36,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 310 transitions, 3624 flow [2024-06-21 21:05:36,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:36,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:36,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-21 21:05:36,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235849056603774 [2024-06-21 21:05:36,683 INFO L175 Difference]: Start difference. First operand has 177 places, 251 transitions, 2524 flow. Second operand 8 states and 222 transitions. [2024-06-21 21:05:36,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 310 transitions, 3624 flow [2024-06-21 21:05:37,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 310 transitions, 3531 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-21 21:05:37,597 INFO L231 Difference]: Finished difference. Result has 181 places, 255 transitions, 2682 flow [2024-06-21 21:05:37,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2431, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2682, PETRI_PLACES=181, PETRI_TRANSITIONS=255} [2024-06-21 21:05:37,598 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 125 predicate places. [2024-06-21 21:05:37,598 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 255 transitions, 2682 flow [2024-06-21 21:05:37,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:37,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:37,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:37,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:05:37,598 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:05:37,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:37,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1144195869, now seen corresponding path program 2 times [2024-06-21 21:05:37,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:37,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619414727] [2024-06-21 21:05:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:37,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:38,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:38,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619414727] [2024-06-21 21:05:38,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619414727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:38,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:38,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:05:38,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838614433] [2024-06-21 21:05:38,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:38,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:05:38,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:38,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:05:38,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:05:38,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:05:38,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 255 transitions, 2682 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:38,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:38,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:05:38,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:42,039 INFO L124 PetriNetUnfolderBase]: 11416/16373 cut-off events. [2024-06-21 21:05:42,039 INFO L125 PetriNetUnfolderBase]: For 1097107/1097115 co-relation queries the response was YES. [2024-06-21 21:05:42,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133785 conditions, 16373 events. 11416/16373 cut-off events. For 1097107/1097115 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 95643 event pairs, 4189 based on Foata normal form. 28/16397 useless extension candidates. Maximal degree in co-relation 133711. Up to 15234 conditions per place. [2024-06-21 21:05:42,224 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 247 selfloop transitions, 52 changer transitions 0/308 dead transitions. [2024-06-21 21:05:42,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 308 transitions, 3562 flow [2024-06-21 21:05:42,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:42,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:42,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-21 21:05:42,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-06-21 21:05:42,225 INFO L175 Difference]: Start difference. First operand has 181 places, 255 transitions, 2682 flow. Second operand 8 states and 215 transitions. [2024-06-21 21:05:42,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 308 transitions, 3562 flow [2024-06-21 21:05:42,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 308 transitions, 3381 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 21:05:42,918 INFO L231 Difference]: Finished difference. Result has 184 places, 261 transitions, 2725 flow [2024-06-21 21:05:42,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2511, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2725, PETRI_PLACES=184, PETRI_TRANSITIONS=261} [2024-06-21 21:05:42,919 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 128 predicate places. [2024-06-21 21:05:42,919 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 261 transitions, 2725 flow [2024-06-21 21:05:42,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:42,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:42,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:42,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:05:42,920 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:05:42,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:42,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1477370911, now seen corresponding path program 1 times [2024-06-21 21:05:42,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:42,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620103655] [2024-06-21 21:05:42,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:42,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:44,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:44,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620103655] [2024-06-21 21:05:44,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620103655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:44,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:44,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:05:44,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123243203] [2024-06-21 21:05:44,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:44,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:05:44,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:44,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:05:44,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:05:44,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:05:44,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 261 transitions, 2725 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:44,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:44,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:05:44,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:47,176 INFO L124 PetriNetUnfolderBase]: 11494/16492 cut-off events. [2024-06-21 21:05:47,177 INFO L125 PetriNetUnfolderBase]: For 1132676/1132684 co-relation queries the response was YES. [2024-06-21 21:05:47,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135393 conditions, 16492 events. 11494/16492 cut-off events. For 1132676/1132684 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 96486 event pairs, 4182 based on Foata normal form. 12/16500 useless extension candidates. Maximal degree in co-relation 135319. Up to 15346 conditions per place. [2024-06-21 21:05:47,401 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 247 selfloop transitions, 62 changer transitions 0/318 dead transitions. [2024-06-21 21:05:47,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 318 transitions, 3851 flow [2024-06-21 21:05:47,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-21 21:05:47,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5165094339622641 [2024-06-21 21:05:47,403 INFO L175 Difference]: Start difference. First operand has 184 places, 261 transitions, 2725 flow. Second operand 8 states and 219 transitions. [2024-06-21 21:05:47,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 318 transitions, 3851 flow [2024-06-21 21:05:48,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 318 transitions, 3719 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 21:05:48,390 INFO L231 Difference]: Finished difference. Result has 188 places, 270 transitions, 2942 flow [2024-06-21 21:05:48,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2593, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2942, PETRI_PLACES=188, PETRI_TRANSITIONS=270} [2024-06-21 21:05:48,391 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 132 predicate places. [2024-06-21 21:05:48,391 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 270 transitions, 2942 flow [2024-06-21 21:05:48,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:48,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:48,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:48,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:05:48,392 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:05:48,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:48,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1483084831, now seen corresponding path program 2 times [2024-06-21 21:05:48,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:48,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813165763] [2024-06-21 21:05:48,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:48,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:49,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:49,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813165763] [2024-06-21 21:05:49,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813165763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:49,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:49,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:05:49,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090251015] [2024-06-21 21:05:49,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:49,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:05:49,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:49,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:05:49,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:05:49,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:05:49,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 270 transitions, 2942 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:49,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:49,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:05:49,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:52,583 INFO L124 PetriNetUnfolderBase]: 11526/16534 cut-off events. [2024-06-21 21:05:52,583 INFO L125 PetriNetUnfolderBase]: For 1185135/1185143 co-relation queries the response was YES. [2024-06-21 21:05:52,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138697 conditions, 16534 events. 11526/16534 cut-off events. For 1185135/1185143 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 96810 event pairs, 4182 based on Foata normal form. 12/16542 useless extension candidates. Maximal degree in co-relation 138621. Up to 15375 conditions per place. [2024-06-21 21:05:52,762 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 254 selfloop transitions, 69 changer transitions 0/332 dead transitions. [2024-06-21 21:05:52,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 332 transitions, 4046 flow [2024-06-21 21:05:52,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:05:52,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:05:52,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 265 transitions. [2024-06-21 21:05:52,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 21:05:52,764 INFO L175 Difference]: Start difference. First operand has 188 places, 270 transitions, 2942 flow. Second operand 10 states and 265 transitions. [2024-06-21 21:05:52,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 332 transitions, 4046 flow